/* roulang page: index */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 68px;
            --step-h: 48px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }

        a:hover {
            text-decoration: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .container {
            max-width: 1280px;
        }

        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }

        .navbar-logo span.logo-text {
            color: var(--ink);
        }

        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(16px, 2vw, 28px);
        }

        .desktop-nav a.nav-link-item {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }

        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }

        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }

        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }

        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }

        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }

        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }

        .mobile-nav-panel {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 20px 24px;
            z-index: 1040;
            display: none;
            flex-direction: column;
            gap: 8px;
            max-height: calc(100vh - var(--header-h));
            overflow-y: auto;
        }

        .mobile-nav-panel.open {
            display: flex;
        }

        .mobile-nav-panel a {
            font-size: 0.95rem;
            font-weight: 500;
            padding: 10px 4px;
            border-bottom: 1px solid var(--line);
            color: var(--ink-soft);
        }

        .mobile-nav-panel a:last-child {
            border-bottom: none;
        }

        .mobile-nav-panel a.active {
            color: var(--ink);
            font-weight: 700;
        }

        /* ===== Progress Step Nav ===== */
        .progress-step-nav {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            z-index: 1045;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            height: var(--step-h);
            display: flex;
            align-items: center;
        }

        .progress-step-nav .step-inner {
            display: flex;
            align-items: center;
            gap: 0;
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .progress-step-nav .step-inner::-webkit-scrollbar {
            display: none;
        }

        .progress-step-nav .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            padding: 0 16px;
            height: var(--step-h);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--ink-soft);
            cursor: pointer;
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .progress-step-nav .step-item .step-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--line);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .progress-step-nav .step-item.active .step-dot {
            background: var(--accent-2);
            box-shadow: 0 0 0 4px var(--accent-2-dim);
        }

        .progress-step-nav .step-item.active {
            color: var(--ink);
            font-weight: 600;
        }

        .progress-step-nav .step-item:hover {
            color: var(--ink);
        }

        .progress-step-nav .step-connector {
            width: 28px;
            height: 2px;
            background: var(--line);
            flex-shrink: 0;
        }

        /* ===== Buttons ===== */
        .btn-hth {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 600;
            border: 1px solid transparent;
            transition: all var(--transition-base);
            position: relative;
            white-space: nowrap;
        }

        .btn-hth:active {
            transform: translateY(1px) scale(0.98);
        }

        .btn-primary-hth {
            background: var(--primary);
            color: var(--accent);
            border-color: var(--primary);
        }

        .btn-primary-hth:hover {
            transform: translateY(-2px);
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 6px 20px rgba(27, 31, 36, 0.25);
        }

        .btn-outline-hth {
            background: transparent;
            color: var(--ink);
            border-color: var(--line);
        }

        .btn-outline-hth:hover {
            border-color: var(--ink);
            background: var(--surface);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-accent-hth {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            font-weight: 700;
        }

        .btn-accent-hth:hover {
            background: #c8f02e;
            border-color: #c8f02e;
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(214, 255, 63, 0.35);
        }

        .btn-dark-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-dark-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            background: rgba(214, 255, 63, 0.06);
        }

        .btn-sm-hth {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* ===== Section Base ===== */
        .section-block {
            padding: clamp(56px, 7vw, 88px) 0;
            position: relative;
        }

        .section-block-sm {
            padding: clamp(40px, 5vw, 64px) 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--ink-soft);
            margin-bottom: 16px;
        }

        .section-label .label-line {
            width: 32px;
            height: 2px;
            background: var(--accent-2);
            display: inline-block;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--ink-soft);
            line-height: 1.85;
            max-width: 640px;
        }

        /* ===== Hero / Metrics Board ===== */
        .hero-section {
            position: relative;
            background: var(--bg-deep);
            min-height: min(680px, 90vh);
            display: flex;
            align-items: center;
            padding: calc(var(--header-h) + var(--step-h) + 40px) 0 48px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 14, 17, 0.55);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(214, 255, 63, 0.12);
            border: 1px solid rgba(214, 255, 63, 0.28);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 20px;
            white-space: nowrap;
        }

        .hero-badge .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            animation: pulse-dot 1.6s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(214, 255, 63, 0.45);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(214, 255, 63, 0);
            }
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.4rem);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.03em;
            color: #fff;
            margin-bottom: 20px;
        }

        .hero-title .highlight {
            color: var(--accent);
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.5vw, 1.2rem);
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.75;
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 32px;
        }

        .hero-carousel-dots {
            display: flex;
            gap: 8px;
            align-items: center;
            margin-bottom: 24px;
        }

        .carousel-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.25);
            border: none;
            padding: 0;
            transition: all var(--transition-base);
        }

        .carousel-dot.active {
            background: var(--accent);
            width: 28px;
            border-radius: 6px;
        }

        .carousel-dot:hover {
            background: rgba(255, 255, 255, 0.5);
        }

        .hero-metric-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            margin-top: 8px;
        }

        .hero-metric-card {
            background: rgba(16, 20, 26, 0.72);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            transition: all var(--transition-base);
        }

        .hero-metric-card:hover {
            border-color: rgba(214, 255, 63, 0.45);
            box-shadow: var(--shadow-dark);
            transform: translateY(-3px);
        }

        .metric-value {
            font-family: var(--font-num);
            font-size: 2.4rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        .metric-value .unit {
            font-size: 1rem;
            color: var(--accent);
            font-weight: 500;
            margin-left: 4px;
        }

        .metric-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.62);
            margin-top: 6px;
            font-weight: 500;
        }

        .hero-countdown-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .countdown-ring {
            position: relative;
            width: 100px;
            height: 100px;
            flex-shrink: 0;
        }

        .countdown-ring svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }

        .countdown-ring .ring-bg {
            fill: none;
            stroke: rgba(255, 255, 255, 0.1);
            stroke-width: 6;
        }

        .countdown-ring .ring-fg {
            fill: none;
            stroke: var(--accent);
            stroke-width: 6;
            stroke-linecap: round;
            transition: stroke-dashoffset 1s linear;
        }

        .countdown-ring .ring-center {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-family: var(--font-num);
        }

        .countdown-ring .ring-center .days {
            font-size: 1.6rem;
            font-weight: 800;
            line-height: 1.1;
        }

        .countdown-ring .ring-center .label {
            font-size: 0.65rem;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 0.08em;
        }

        .countdown-info {
            color: rgba(255, 255, 255, 0.72);
            font-size: 0.88rem;
        }

        .countdown-info strong {
            color: var(--accent);
            font-weight: 700;
        }

        .stock-alert {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: var(--warning);
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(255, 181, 71, 0.1);
            border: 1px solid rgba(255, 181, 71, 0.3);
            margin-left: 12px;
        }

        /* ===== Entry Matrix ===== */
        .entry-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
        }

        .entry-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-base);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .entry-card:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .entry-card .entry-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: var(--accent-dim);
            color: var(--ink);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin: 0 auto 12px;
            transition: all var(--transition-base);
        }

        .entry-card:hover .entry-icon {
            background: var(--accent);
        }

        .entry-card .entry-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .entry-card .entry-count {
            font-size: 0.75rem;
            color: var(--ink-soft);
            font-weight: 500;
        }

        /* ===== Service Matrix ===== */
        .service-matrix-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .service-matrix-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: clamp(20px, 3vw, 32px);
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-matrix-card:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .service-matrix-card.card-large {
            grid-row: span 2;
        }

        .service-card-num {
            font-family: var(--font-num);
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--ink-soft);
            letter-spacing: 0.08em;
            margin-bottom: 12px;
        }

        .service-card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--ink);
            margin-bottom: 14px;
        }

        .service-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .service-card-desc {
            font-size: 0.9rem;
            color: var(--ink-soft);
            line-height: 1.75;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .service-card-cover {
            width: 100%;
            aspect-ratio: 16/10;
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 14px;
            background: #e9edf0;
        }

        .service-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .service-matrix-card:hover .service-card-cover img {
            transform: scale(1.04);
        }

        .service-capability-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--ink-soft);
        }

        .capability-track {
            flex: 1;
            height: 6px;
            background: var(--line);
            border-radius: 3px;
            overflow: hidden;
        }

        .capability-fill {
            height: 100%;
            border-radius: 3px;
            background: var(--accent-2);
        }

        .service-tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 12px;
        }

        .service-tag {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            background: var(--bg);
            color: var(--ink-soft);
            border: 1px solid var(--line);
        }

        /* ===== Results Comparison ===== */
        .comparison-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .comparison-row {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: all var(--transition-base);
        }

        .comparison-row:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
        }

        .comparison-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.95rem;
        }

        .comparison-info {
            flex: 1;
            min-width: 0;
        }

        .comparison-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .comparison-meta {
            font-size: 0.78rem;
            color: var(--ink-soft);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .comparison-bar-wrap {
            width: 100%;
            max-width: 280px;
            flex-shrink: 0;
        }

        .comparison-bar-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--ink-soft);
            margin-bottom: 4px;
        }

        .comparison-bar {
            height: 8px;
            background: var(--line);
            border-radius: 4px;
            overflow: hidden;
            position: relative;
        }

        .comparison-bar .fill-before {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            background: #c5cdd3;
            border-radius: 4px;
        }

        .comparison-bar .fill-after {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            background: var(--accent);
            border-radius: 4px;
        }

        .comparison-improve {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--signal);
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* ===== Milestone Timeline ===== */
        .milestone-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 32px;
        }

        .milestone-list::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: var(--line);
            border-radius: 1px;
        }

        .milestone-item {
            position: relative;
            padding-bottom: 28px;
        }

        .milestone-item:last-child {
            padding-bottom: 0;
        }

        .milestone-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 8px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-2);
            box-shadow: 0 0 0 4px var(--accent-2-dim);
        }

        .milestone-date {
            font-family: var(--font-num);
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-2);
            letter-spacing: 0.06em;
            margin-bottom: 4px;
        }

        .milestone-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .milestone-desc {
            font-size: 0.88rem;
            color: var(--ink-soft);
            line-height: 1.7;
        }

        /* ===== Activity Highlight Wall ===== */
        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .highlight-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .highlight-card:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .highlight-card .cover-wrap {
            aspect-ratio: 3/2;
            overflow: hidden;
            background: #e9edf0;
        }

        .highlight-card .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .highlight-card:hover .cover-wrap img {
            transform: scale(1.05);
        }

        .highlight-card .body {
            padding: 16px 20px 20px;
        }

        .highlight-card .hl-tag {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            background: var(--accent-dim);
            color: var(--ink);
            margin-bottom: 8px;
            display: inline-block;
        }

        .highlight-card .hl-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .highlight-card .hl-desc {
            font-size: 0.82rem;
            color: var(--ink-soft);
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .highlight-card .hl-btn {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--ink);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            border: none;
            background: none;
            padding: 0;
        }

        .highlight-card .hl-btn i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }

        .highlight-card:hover .hl-btn i {
            transform: translateX(4px);
        }

        /* ===== News / Info Section ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-list-item {
            display: flex;
            gap: 18px;
            padding: 18px 0;
            border-bottom: 1px solid var(--line);
            transition: all var(--transition-fast);
        }

        .news-list-item:first-child {
            padding-top: 0;
        }

        .news-list-item:hover {
            opacity: 0.75;
        }

        .news-num {
            font-family: var(--font-num);
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--ink-soft);
            flex-shrink: 0;
            width: 28px;
            padding-top: 2px;
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-title-link {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--ink);
            display: block;
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-title-link:hover {
            color: var(--ink);
            opacity: 0.75;
        }

        .news-excerpt {
            font-size: 0.85rem;
            color: var(--ink-soft);
            line-height: 1.7;
        }

        .news-sidebar {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            align-self: start;
            position: sticky;
            top: calc(var(--header-h) + var(--step-h) + 20px);
        }

        .news-sidebar h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 16px;
        }

        .news-sidebar .sidebar-link {
            display: block;
            font-size: 0.85rem;
            color: var(--ink-soft);
            padding: 8px 0;
            border-bottom: 1px solid var(--line);
            transition: all var(--transition-fast);
            line-height: 1.5;
        }

        .news-sidebar .sidebar-link:last-child {
            border-bottom: none;
        }

        .news-sidebar .sidebar-link:hover {
            color: var(--ink);
            padding-left: 4px;
        }

        .news-sidebar .sidebar-link .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-2);
            display: inline-block;
            margin-right: 8px;
            vertical-align: middle;
        }

        /* ===== Platform Guarantee ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .guarantee-item:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
        }

        .guarantee-item .gi-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--accent-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.95rem;
            color: var(--ink);
        }

        .guarantee-item .gi-text {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--ink);
        }

        /* ===== User Reviews ===== */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }

        .review-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
        }

        .review-card:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .review-stars {
            color: var(--warning);
            font-size: 0.85rem;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }

        .review-text {
            font-size: 0.9rem;
            color: var(--ink-soft);
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .review-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .review-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--ink);
        }

        .review-role {
            font-size: 0.72rem;
            color: var(--ink-soft);
        }

        /* ===== Partner Tags ===== */
        .partner-tags-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 14px;
        }

        .partner-tag-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .partner-tag-card:hover {
            border-color: var(--accent);
            background: var(--accent-dim);
            transform: translateY(-2px);
        }

        .partner-tag-card .pt-name {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .partner-tag-card .pt-desc {
            font-size: 0.72rem;
            color: var(--ink-soft);
            line-height: 1.5;
        }

        /* ===== Brand Intro ===== */
        .brand-intro {
            background: var(--bg-deep);
            color: #fff;
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4vw, 48px);
            position: relative;
            overflow: hidden;
        }

        .brand-intro::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(214, 255, 63, 0.06);
            pointer-events: none;
        }

        .brand-intro h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .brand-intro p {
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.9;
            max-width: 800px;
            position: relative;
            z-index: 1;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-accordion .accordion-item:last-child {
            margin-bottom: 0;
        }

        .faq-accordion .accordion-button {
            background: var(--surface);
            color: var(--ink);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 22px;
            border-radius: var(--radius-md) !important;
            box-shadow: none;
            border: none;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--ink);
            border-left: 3px solid var(--accent);
            border-radius: var(--radius-md) var(--radius-md) 0 0 !important;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
        }

        .faq-accordion .accordion-button::after {
            display: none;
        }

        .faq-accordion .accordion-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--ink);
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-accordion .accordion-button:not(.collapsed) .accordion-icon {
            transform: rotate(45deg);
            background: var(--accent);
        }

        .faq-accordion .accordion-body {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--ink-soft);
            line-height: 1.8;
            border-left: 3px solid var(--accent);
        }

        /* ===== Conversion Form ===== */
        .conversion-section {
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
        }

        .conversion-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .conversion-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 14, 17, 0.55);
            z-index: 1;
        }

        .conversion-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .conversion-left h3 {
            color: #fff;
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .conversion-left .conv-desc {
            color: rgba(255, 255, 255, 0.72);
            font-size: 0.98rem;
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 400px;
        }

        .conv-point-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .conv-point-list li {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.9rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.6;
        }

        .conv-point-list li i {
            color: var(--accent);
            font-size: 0.8rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .conversion-form-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: clamp(24px, 3vw, 36px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .conversion-form-card .form-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .conversion-form-card .form-sub {
            font-size: 0.8rem;
            color: var(--ink-soft);
            margin-bottom: 20px;
        }

        .conversion-form-card .form-label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 4px;
        }

        .conversion-form-card .form-control,
        .conversion-form-card .form-select {
            height: 46px;
            border-radius: 8px;
            border: 1px solid var(--line);
            font-size: 0.9rem;
            padding: 0 14px;
            color: var(--ink);
            background: var(--surface);
            transition: all var(--transition-fast);
            box-shadow: none !important;
        }

        .conversion-form-card .form-control:focus,
        .conversion-form-card .form-select:focus {
            border-color: var(--accent-2);
            box-shadow: 0 0 0 3px rgba(0, 208, 229, 0.15) !important;
        }

        .conversion-form-card .form-control::placeholder {
            color: #adb5bd;
            font-size: 0.85rem;
        }

        .conversion-form-card .btn-submit {
            width: 100%;
            background: var(--primary);
            color: var(--accent);
            border: none;
            border-radius: 8px;
            padding: 13px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            transition: all var(--transition-base);
            margin-top: 8px;
        }

        .conversion-form-card .btn-submit:hover {
            background: #2a3037;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(27, 31, 36, 0.3);
        }

        .conversion-form-card .btn-submit:active {
            transform: translateY(1px) scale(0.98);
        }

        /* ===== App Download ===== */
        .app-section {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4vw, 44px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .app-info h4 {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .app-info p {
            font-size: 0.9rem;
            color: var(--ink-soft);
            margin-bottom: 0;
            max-width: 500px;
        }

        .app-badge-group {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
        }

        .app-badge-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--line);
            background: var(--bg);
            cursor: pointer;
            transition: all var(--transition-fast);
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--ink);
        }

        .app-badge-btn:hover {
            border-color: var(--ink);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .app-badge-btn i {
            font-size: 1.2rem;
            color: var(--ink);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.72);
            padding: 48px 0 24px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.02em;
        }

        .footer-brand .footer-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 800;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 0;
            transition: all var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.78rem;
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        .footer-legal-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Scroll Top Button ===== */
        .scroll-top-btn {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            border: 1px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            z-index: 1030;
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .scroll-top-btn.visible {
            opacity: 1;
            pointer-events: auto;
        }

        .scroll-top-btn:hover {
            background: #2a3037;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1200px) {
            .container {
                max-width: 100%;
                padding-left: 24px;
                padding-right: 24px;
            }
            .container-fluid-custom {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 991px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .service-matrix-grid {
                grid-template-columns: 1fr;
            }
            .service-matrix-card.card-large {
                grid-row: auto;
            }
            .highlight-grid {
                grid-template-columns: 1fr 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .news-sidebar {
                position: static;
            }
            .conversion-content {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .hero-metric-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .entry-matrix-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 767px) {
            :root {
                --header-h: 60px;
                --step-h: 42px;
            }
            .section-block {
                padding: 44px 0;
            }
            .section-block-sm {
                padding: 32px 0;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-metric-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .hero-metric-card {
                padding: 14px 16px;
            }
            .metric-value {
                font-size: 1.7rem;
            }
            .highlight-grid {
                grid-template-columns: 1fr;
            }
            .entry-matrix-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .entry-card {
                padding: 16px 12px;
            }
            .comparison-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .comparison-bar-wrap {
                max-width: 100%;
                width: 100%;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .partner-tags-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .app-section {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .conversion-form-card {
                padding: 20px;
            }
            .hero-cta-group .btn-hth {
                width: 100%;
            }
            .progress-step-nav .step-item {
                font-size: 0.72rem;
                padding: 0 10px;
            }
            .progress-step-nav .step-connector {
                width: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .container-fluid-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-metric-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .metric-value {
                font-size: 1.4rem;
            }
            .entry-matrix-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .entry-card {
                padding: 12px 10px;
            }
            .entry-card .entry-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .review-card {
                padding: 18px;
            }
            .partner-tags-grid {
                grid-template-columns: 1fr 1fr;
            }
            .btn-hth {
                padding: 10px 20px;
                font-size: 0.85rem;
            }
            .faq-accordion .accordion-button {
                font-size: 0.85rem;
                padding: 14px 16px;
            }
            .faq-accordion .accordion-body {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 68px;
            --step-h: 48px;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1280px;
        }
        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }
        .navbar-logo span.logo-text {
            color: var(--ink);
        }
        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(16px, 2vw, 28px);
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }
        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }
        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }
        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }
        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }
        .mobile-nav-panel {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 20px 24px;
            display: none;
            flex-direction: column;
            gap: 12px;
            z-index: 1040;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 10px 0;
            border-bottom: 1px solid var(--line);
            transition: color var(--transition-fast);
        }
        .mobile-nav-panel a:last-child {
            border-bottom: none;
        }
        .mobile-nav-panel a.active,
        .mobile-nav-panel a:hover {
            color: var(--ink);
            font-weight: 600;
        }

        /* ===== Step Progress Nav ===== */
        .step-progress-bar {
            background: var(--surface-deep);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            height: var(--step-h);
            display: flex;
            align-items: center;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            z-index: 1040;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .step-progress-bar::-webkit-scrollbar {
            display: none;
        }
        .step-progress-inner {
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: max-content;
            padding: 0 16px;
        }
        .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.55);
            white-space: nowrap;
            transition: color var(--transition-base);
        }
        .step-item .step-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.25);
            transition: background var(--transition-base);
        }
        .step-item.active {
            color: var(--accent);
        }
        .step-item.active .step-dot {
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }
        .step-item.done {
            color: rgba(255, 255, 255, 0.85);
        }
        .step-item.done .step-dot {
            background: var(--accent-2);
        }
        .step-item a {
            color: inherit;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .step-item a:hover {
            color: var(--accent);
        }

        /* ===== Inner Hero ===== */
        .inner-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 64px 0 52px;
            margin-top: var(--step-h);
        }
        .inner-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 14, 17, 0.68);
        }
        .inner-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
        }
        .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        .breadcrumb-custom .current {
            color: var(--accent);
            font-weight: 600;
        }
        .inner-hero h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }
        .inner-hero h1 .accent-word {
            color: var(--accent);
        }
        .inner-hero .hero-sub {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 620px;
            line-height: 1.85;
        }

        /* ===== Stats Strip ===== */
        .stats-strip {
            padding: 36px 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
        }
        .stats-strip .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card-mini {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: all var(--transition-base);
        }
        .stat-card-mini:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .stat-card-mini .stat-num {
            font-family: var(--font-num);
            font-size: 2rem;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .stat-card-mini .stat-label {
            font-size: 0.82rem;
            color: var(--ink-soft);
            margin-top: 4px;
        }

        /* ===== Compare Section ===== */
        .compare-section {
            padding: 56px 0 64px;
            background: var(--bg);
        }
        .section-head-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .section-head-row .section-title {
            font-size: clamp(1.4rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.01em;
            margin: 0;
        }
        .section-head-row .section-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-2);
            letter-spacing: 0.08em;
            background: var(--accent-2-dim);
            padding: 4px 12px;
            border-radius: 999px;
        }
        .compare-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .compare-row {
            display: grid;
            grid-template-columns: 180px 1fr auto;
            gap: 18px;
            align-items: center;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            transition: all var(--transition-base);
        }
        .compare-row:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .compare-row .compare-thumb {
            width: 100%;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--line);
        }
        .compare-row .compare-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .compare-row .compare-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 4px;
            color: var(--ink);
        }
        .compare-row .compare-info .compare-desc {
            font-size: 0.85rem;
            color: var(--ink-soft);
            line-height: 1.6;
            margin: 0;
        }
        .compare-row .compare-bars {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .compare-bars .bar-group {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 120px;
        }
        .compare-bars .bar-label {
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--ink-soft);
            display: flex;
            justify-content: space-between;
        }
        .compare-bars .bar-track {
            height: 6px;
            background: var(--bg);
            border-radius: 999px;
            overflow: hidden;
        }
        .compare-bars .bar-fill {
            height: 100%;
            border-radius: 999px;
            background: var(--accent);
            transition: width 0.8s ease-out;
        }
        .compare-bars .bar-fill.old {
            background: #B9C1C8;
        }
        .compare-bars .bar-fill.new {
            background: var(--accent);
        }
        .compare-bars .delta-badge {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--signal);
            background: rgba(255, 61, 113, 0.1);
            border-radius: var(--radius-sm);
            padding: 4px 10px;
            white-space: nowrap;
        }

        /* ===== Conclusion Card ===== */
        .conclusion-block {
            padding: 56px 0;
            background: var(--bg-deep);
            color: #fff;
        }
        .conclusion-card {
            background: var(--surface-deep);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4vw, 48px);
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 36px;
            align-items: center;
        }
        .conclusion-card .conclusion-left h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .conclusion-card .conclusion-left p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            line-height: 1.85;
            margin: 0;
        }
        .conclusion-card .conclusion-left .check-list {
            list-style: none;
            padding: 0;
            margin: 18px 0 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .conclusion-card .conclusion-left .check-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .conclusion-card .conclusion-left .check-list li i {
            color: var(--accent);
            font-size: 0.9rem;
        }
        .conclusion-card .conclusion-right {
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: flex-end;
        }
        .conclusion-card .conclusion-right .big-stat {
            font-family: var(--font-num);
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
        }
        .conclusion-card .conclusion-right .stat-note {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
        }
        .btn-accent-solid {
            background: var(--accent);
            color: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            display: inline-block;
        }
        .btn-accent-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(214, 255, 63, 0.25);
            color: var(--primary);
        }
        .btn-accent-solid:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        /* ===== Use Cases ===== */
        .use-case-section {
            padding: 56px 0;
            background: var(--surface);
        }
        .use-case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .use-case-card {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
        }
        .use-case-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .use-case-card .uc-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--ink);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }
        .use-case-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--ink);
        }
        .use-case-card p {
            font-size: 0.88rem;
            color: var(--ink-soft);
            line-height: 1.75;
            margin: 0;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 56px 0;
            background: var(--bg);
        }
        .faq-section .accordion-item {
            border: 1px solid var(--line);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            background: var(--surface);
            transition: all var(--transition-base);
        }
        .faq-section .accordion-item:hover {
            border-color: var(--accent);
        }
        .faq-section .accordion-button {
            background: transparent;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--ink);
            padding: 18px 20px;
            box-shadow: none;
            border: none;
            position: relative;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: var(--accent-dim);
            color: var(--ink);
            box-shadow: none;
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            border: none;
            outline: 2px solid var(--accent-2);
            outline-offset: -2px;
        }
        .faq-section .accordion-button::after {
            filter: brightness(0.4);
        }
        .faq-section .accordion-button:not(.collapsed)::after {
            filter: brightness(0.2);
        }
        .faq-section .accordion-body {
            padding: 18px 20px;
            font-size: 0.9rem;
            color: var(--ink-soft);
            line-height: 1.8;
            border-top: 1px solid var(--line);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 56px 0;
            background: var(--bg-deep);
            color: #fff;
        }
        .cta-panel {
            background: var(--surface-deep);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4vw, 48px);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }
        .cta-panel .cta-left h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .cta-panel .cta-left p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            line-height: 1.8;
            margin: 0 0 16px;
        }
        .cta-panel .cta-left .cta-points {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .cta-panel .cta-left .cta-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.8);
        }
        .cta-panel .cta-left .cta-points li i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .cta-form .form-label {
            font-size: 0.82rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 2px;
        }
        .cta-form .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            color: #fff;
            height: 46px;
            font-size: 0.9rem;
            padding: 0 14px;
            transition: all var(--transition-fast);
        }
        .cta-form .form-control::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .cta-form .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(214, 255, 63, 0.15);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .cta-form .btn-submit {
            background: var(--accent);
            color: var(--primary);
            border: none;
            border-radius: 8px;
            height: 48px;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            margin-top: 4px;
        }
        .cta-form .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(214, 255, 63, 0.25);
        }
        .cta-form .btn-submit:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: #fff;
            padding: 56px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .footer-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.2rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 800;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            line-height: 1.75;
            max-width: 300px;
        }
        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            padding-top: 20px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-legal-links {
            display: flex;
            gap: 16px;
            margin-left: auto;
        }
        .footer-legal-links a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.78rem;
            transition: color var(--transition-fast);
        }
        .footer-legal-links a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .desktop-nav {
                gap: 14px;
            }
            .desktop-nav a.nav-link-item {
                font-size: 0.82rem;
            }
            .stats-strip .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .compare-row {
                grid-template-columns: 120px 1fr;
            }
            .compare-row .compare-bars {
                grid-column: 2;
                flex-wrap: wrap;
            }
            .conclusion-card {
                grid-template-columns: 1fr;
            }
            .conclusion-card .conclusion-right {
                align-items: flex-start;
            }
            .cta-panel {
                grid-template-columns: 1fr;
            }
            .use-case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767.98px) {
            :root {
                --header-h: 56px;
                --step-h: 38px;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .navbar-logo {
                font-size: 1.1rem;
            }
            .navbar-logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 0.75rem;
            }
            .inner-hero {
                padding: 40px 0 36px;
            }
            .inner-hero h1 {
                font-size: 1.5rem;
            }
            .stats-strip .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card-mini .stat-num {
                font-size: 1.5rem;
            }
            .compare-row {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 14px;
            }
            .compare-row .compare-thumb {
                max-width: 140px;
                height: 56px;
            }
            .compare-row .compare-bars {
                grid-column: 1;
                flex-wrap: wrap;
                gap: 8px;
            }
            .compare-bars .bar-group {
                min-width: 100px;
            }
            .use-case-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-legal-links {
                margin-left: 0;
            }
            .conclusion-card .conclusion-right .big-stat {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 420px) {
            .stats-strip .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-card-mini {
                padding: 12px 14px;
            }
            .stat-card-mini .stat-num {
                font-size: 1.2rem;
            }
            .compare-bars .bar-group {
                min-width: 80px;
            }
            .inner-hero h1 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 68px;
            --step-h: 48px;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1280px;
        }
        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }
        .navbar-logo span.logo-text {
            color: var(--ink);
        }
        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(14px, 1.8vw, 26px);
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }
        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }
        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }
        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }
        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 20px 24px;
            z-index: 1040;
            flex-direction: column;
            gap: 10px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 10px 4px;
            border-bottom: 1px solid var(--line);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--ink);
            padding-left: 8px;
        }
        .mobile-nav-panel a.active {
            font-weight: 700;
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }

        /* ===== Step Progress Nav ===== */
        .step-progress-bar {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            z-index: 1035;
            height: var(--step-h);
            background: var(--bg);
            border-bottom: 1px solid var(--line);
            display: flex;
            align-items: center;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .step-progress-bar::-webkit-scrollbar {
            display: none;
        }
        .step-progress-inner {
            display: flex;
            align-items: center;
            gap: 0;
            min-width: max-content;
            max-width: 1280px;
            width: 100%;
            margin: 0 auto;
            padding: 0 clamp(16px, 4vw, 48px);
        }
        .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--ink-soft);
            white-space: nowrap;
            position: relative;
            transition: color var(--transition-base);
            cursor: pointer;
        }
        .step-item:hover {
            color: var(--ink);
        }
        .step-item.active {
            color: var(--ink);
        }
        .step-item .step-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--line);
            flex-shrink: 0;
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }
        .step-item.active .step-dot {
            background: var(--accent);
            box-shadow: 0 0 12px rgba(214, 255, 63, 0.5);
        }
        .step-item.done .step-dot {
            background: var(--accent-2);
        }
        .step-divider {
            flex: 0 0 24px;
            height: 1px;
            background: var(--line);
            margin: 0 4px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 14px 0;
            margin-bottom: 0;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--ink-soft);
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .breadcrumb-nav li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-nav a {
            color: var(--ink-soft);
            transition: color var(--transition-fast);
        }
        .breadcrumb-nav a:hover {
            color: var(--ink);
        }
        .breadcrumb-nav .separator {
            color: var(--line);
            font-size: 0.75rem;
        }
        .breadcrumb-nav .current {
            color: var(--ink);
            font-weight: 600;
        }

        /* ===== Inner Hero ===== */
        .inner-hero {
            background: var(--bg-deep);
            color: #fff;
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .inner-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .inner-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(11, 14, 17, 0.82) 0%, rgba(11, 14, 17, 0.92) 100%);
            z-index: 1;
        }
        .inner-hero .container {
            position: relative;
            z-index: 2;
        }
        .inner-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-dim);
            color: var(--accent);
            padding: 4px 14px;
            font-size: 0.78rem;
            font-weight: 700;
            border-radius: 20px;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            border: 1px solid rgba(214, 255, 63, 0.25);
        }
        .inner-hero h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: #fff;
            line-height: 1.3;
        }
        .inner-hero .hero-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .inner-hero .hero-stats-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .inner-hero .hero-stat {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }
        .inner-hero .hero-stat .num {
            font-family: var(--font-num);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.01em;
        }
        .inner-hero .hero-stat .label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 56px 0;
        }
        .section-block-sm {
            padding: 40px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--ink-soft);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-label::before {
            content: '';
            width: 18px;
            height: 2px;
            background: var(--accent);
            flex-shrink: 0;
        }
        .section-title {
            font-size: clamp(1.4rem, 2.4vw, 1.8rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-desc {
            font-size: 0.95rem;
            color: var(--ink-soft);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* ===== Filter Tags ===== */
        .filter-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 20px;
            border: 1px solid var(--line);
            background: var(--surface);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all var(--transition-fast);
            cursor: pointer;
            user-select: none;
        }
        .filter-tag:hover {
            border-color: var(--accent);
            color: var(--ink);
            background: var(--accent-dim);
        }
        .filter-tag.active {
            border-color: var(--primary);
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .filter-tag .tag-count {
            font-family: var(--font-num);
            font-size: 0.72rem;
            background: rgba(0, 0, 0, 0.06);
            padding: 1px 7px;
            border-radius: 10px;
        }
        .filter-tag.active .tag-count {
            background: rgba(255, 255, 255, 0.2);
        }

        /* ===== Grid Cards ===== */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .grid-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .grid-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .grid-card:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
        }
        .grid-card .card-image-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg);
        }
        .grid-card .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease-out;
        }
        .grid-card:hover .card-image-wrap img {
            transform: scale(1.04);
        }
        .grid-card .card-index {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(11, 14, 17, 0.7);
            color: var(--accent);
            font-family: var(--font-num);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 4px;
            letter-spacing: 0.06em;
            z-index: 1;
        }
        .grid-card .card-badge {
            position: absolute;
            top: 10px;
            right: 10px;
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            z-index: 1;
            background: var(--accent-dim);
            color: var(--primary);
            border: 1px solid rgba(214, 255, 63, 0.4);
        }
        .grid-card .card-badge.hot {
            background: rgba(255, 61, 113, 0.12);
            color: var(--signal);
            border-color: rgba(255, 61, 113, 0.3);
        }
        .grid-card .card-badge.stable {
            background: rgba(0, 208, 229, 0.12);
            color: var(--accent-2);
            border-color: rgba(0, 208, 229, 0.3);
        }
        .grid-card .card-badge.new {
            background: rgba(255, 181, 71, 0.14);
            color: #d4880a;
            border-color: rgba(255, 181, 71, 0.35);
        }
        .grid-card .card-body {
            padding: 16px 16px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .grid-card .card-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.45;
            margin: 0;
        }
        .grid-card .card-desc {
            font-size: 0.82rem;
            color: var(--ink-soft);
            line-height: 1.65;
            margin: 0;
            flex: 1;
        }
        .grid-card .metric-bar-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 4px;
        }
        .grid-card .metric-bar-label {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--ink-soft);
            white-space: nowrap;
            min-width: 52px;
        }
        .grid-card .metric-bar {
            flex: 1;
            height: 6px;
            background: var(--bg);
            border-radius: 4px;
            overflow: hidden;
        }
        .grid-card .metric-bar-fill {
            height: 100%;
            border-radius: 4px;
            background: var(--accent);
            transition: width 0.5s ease-out;
        }
        .grid-card .metric-bar-fill.cyan {
            background: var(--accent-2);
        }
        .grid-card .metric-value {
            font-family: var(--font-num);
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--ink);
            min-width: 38px;
            text-align: right;
        }

        /* ===== Metrics Panel ===== */
        .metrics-panel {
            background: var(--surface-deep);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .metrics-panel .metric-item {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .metrics-panel .metric-num {
            font-family: var(--font-num);
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1.1;
        }
        .metrics-panel .metric-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== Process Steps ===== */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .process-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: all var(--transition-base);
        }
        .process-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .process-item .process-num {
            font-family: var(--font-num);
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent);
            background: var(--primary);
            border-radius: var(--radius-sm);
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .process-item .process-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 4px;
        }
        .process-item .process-content p {
            font-size: 0.88rem;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            padding: 16px 20px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--ink);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            letter-spacing: -0.005em;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--accent-dim);
            color: var(--ink);
            box-shadow: none;
        }
        .faq-accordion .accordion-button::after {
            display: none;
        }
        .faq-accordion .faq-icon {
            font-size: 0.8rem;
            color: var(--ink-soft);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-accordion .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(180deg);
            color: var(--ink);
        }
        .faq-accordion .accordion-body {
            padding: 0 20px 16px;
            font-size: 0.88rem;
            color: var(--ink-soft);
            line-height: 1.8;
            border-top: 1px solid var(--line);
            padding-top: 12px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--bg-deep);
            color: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .cta-block .container {
            position: relative;
            z-index: 1;
        }
        .cta-block h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            max-width: 540px;
            margin-bottom: 20px;
        }

        /* ===== Buttons ===== */
        .btn-primary-brand {
            background: var(--primary);
            color: var(--accent);
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 11px 24px;
            font-size: 0.88rem;
            font-weight: 700;
            letter-spacing: 0.01em;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-brand:hover {
            background: #2b3038;
            border-color: #2b3038;
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary-brand:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline-brand {
            background: transparent;
            color: var(--ink);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 10px 20px;
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-brand:hover {
            border-color: var(--accent);
            background: var(--accent-dim);
            color: var(--ink);
            transform: translateY(-2px);
        }
        .btn-outline-brand:active {
            transform: translateY(0);
        }
        .btn-light-brand {
            background: var(--accent);
            color: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 11px 24px;
            font-size: 0.88rem;
            font-weight: 700;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-light-brand:hover {
            background: #c6ef2f;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(214, 255, 63, 0.3);
        }
        .btn-light-brand:active {
            transform: translateY(0);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .site-footer .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
        }
        .site-footer .footer-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.75;
            max-width: 340px;
            margin: 0;
        }
        .site-footer .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .site-footer .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.06em;
            margin-bottom: 6px;
        }
        .site-footer .footer-col a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-legal-links {
            display: flex;
            gap: 16px;
        }
        .site-footer .footer-legal-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-legal-links a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .grid-cards {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 991px) {
            .desktop-nav {
                gap: 12px;
            }
            .desktop-nav a.nav-link-item {
                font-size: 0.78rem;
            }
            .grid-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .grid-cards {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .inner-hero {
                padding: 32px 0 28px;
            }
            .section-block {
                padding: 40px 0;
            }
            .metrics-panel {
                padding: 24px 18px;
            }
            .metrics-panel .metric-num {
                font-size: 1.5rem;
            }
            .cta-block {
                padding: 28px 20px;
            }
            .step-item {
                font-size: 0.72rem;
                padding: 5px 10px;
            }
            .step-divider {
                flex: 0 0 12px;
            }
        }
        @media (max-width: 575px) {
            .grid-cards {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .inner-hero .hero-stats-row {
                gap: 14px;
                flex-direction: column;
            }
            .inner-hero h1 {
                font-size: 1.55rem;
            }
            .filter-tags {
                gap: 8px;
            }
            .filter-tag {
                font-size: 0.75rem;
                padding: 5px 12px;
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .process-item {
                flex-direction: column;
                gap: 10px;
            }
            .process-item .process-num {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
        }
        @media (max-width: 400px) {
            .grid-cards {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category3 */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 60px;
            --step-h: 42px;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1280px;
        }
        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }
        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }
        .navbar-logo span.logo-text {
            color: var(--ink);
        }
        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(14px, 1.8vw, 26px);
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }
        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }
        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }
        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }
        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }
        .mobile-nav-panel {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 12px 20px 24px;
            display: none;
            flex-direction: column;
            gap: 10px;
            z-index: 1049;
            transition: all var(--transition-base);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 10px 4px;
            border-bottom: 1px solid var(--line);
            display: block;
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-nav-panel a.active {
            border-left: 3px solid var(--accent);
            padding-left: 12px;
        }
        /* ===== Step Progress Nav ===== */
        .step-progress-bar {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            z-index: 1048;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            height: var(--step-h);
            display: flex;
            align-items: center;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .step-progress-bar::-webkit-scrollbar {
            display: none;
        }
        .step-progress-inner {
            display: flex;
            align-items: center;
            gap: 0;
            min-width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 clamp(16px, 4vw, 48px);
        }
        .step-progress-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--ink-soft);
            white-space: nowrap;
            padding: 0 8px;
            position: relative;
            transition: color var(--transition-fast);
        }
        .step-progress-item:hover {
            color: var(--ink);
        }
        .step-progress-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .step-progress-item .step-dot {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 2px solid var(--line);
            background: var(--surface);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.65rem;
            font-weight: 700;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .step-progress-item.active .step-dot {
            border-color: var(--accent);
            background: var(--primary);
            color: var(--accent);
        }
        .step-progress-item .step-dot.done {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--primary);
        }
        .step-progress-item .step-line {
            flex: 1;
            height: 2px;
            background: var(--line);
            min-width: 20px;
            margin: 0 4px;
            border-radius: 1px;
        }
        .step-progress-item .step-line:last-child {
            display: none;
        }
        /* ===== Main ===== */
        .main-content {
            padding-top: calc(var(--header-h) + var(--step-h));
        }
        .breadcrumb-custom {
            font-size: 0.82rem;
            color: var(--ink-soft);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 10px;
            padding-top: 18px;
        }
        .breadcrumb-custom a {
            color: var(--ink-soft);
        }
        .breadcrumb-custom a:hover {
            color: var(--ink);
        }
        .breadcrumb-custom .sep {
            color: var(--line);
        }
        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 40px 0 48px;
            background: linear-gradient(135deg, #F4F6F8 0%, #E8ECEF 100%);
            border-bottom: 1px solid var(--line);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: var(--accent-dim);
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: var(--accent-2-dim);
            pointer-events: none;
        }
        .page-hero .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .page-hero h1 {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .page-hero .hero-sub {
            font-size: 1.1rem;
            color: var(--ink-soft);
            margin-bottom: 20px;
            max-width: 520px;
            line-height: 1.75;
        }
        .hero-tag {
            display: inline-block;
            background: var(--primary);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.05em;
            margin-bottom: 14px;
        }
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .btn-custom-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--primary);
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
        }
        .btn-custom-primary:hover {
            background: var(--bg-deep);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            color: var(--accent);
        }
        .btn-custom-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }
        .btn-custom-secondary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            color: var(--ink);
            font-weight: 500;
            font-size: 0.92rem;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--line);
            transition: all var(--transition-base);
        }
        .btn-custom-secondary:hover {
            border-color: var(--accent);
            background: rgba(214, 255, 63, 0.06);
            transform: translateY(-2px);
            color: var(--ink);
        }
        .btn-custom-secondary:active {
            transform: translateY(1px);
        }
        /* Flash sale bar */
        .flash-sale-bar {
            background: var(--bg-deep);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-dark);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .flash-sale-label {
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--warning);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .flash-sale-label i {
            animation: pulse-icon 1.2s ease-in-out infinite;
        }
        .countdown-wrap {
            display: flex;
            align-items: center;
            gap: 6px;
            font-family: var(--font-num);
        }
        .countdown-block {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            padding: 6px 10px;
            text-align: center;
            min-width: 48px;
        }
        .countdown-block .cd-num {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent);
            font-family: var(--font-num);
            display: block;
            line-height: 1.2;
        }
        .countdown-block .cd-label {
            font-size: 0.6rem;
            color: rgba(255, 255, 255, 0.5);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .countdown-sep {
            font-size: 1.1rem;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.4);
            font-family: var(--font-num);
        }
        .flash-match-info {
            flex: 1;
            min-width: 160px;
        }
        .flash-match-info h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 2px;
        }
        .flash-match-info p {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.6);
            margin: 0;
        }
        .flash-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 0.82rem;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            border: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .flash-cta-btn:hover {
            background: #e6ff6b;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(214, 255, 63, 0.3);
            color: var(--primary);
        }
        .flash-cta-btn:active {
            transform: scale(0.96);
        }
        @keyframes pulse-icon {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        /* ===== Metrics Section ===== */
        .metrics-section {
            background: var(--bg-deep);
            padding: 44px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .metric-card-dark {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition-base);
        }
        .metric-card-dark:hover {
            border-color: rgba(214, 255, 63, 0.3);
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }
        .metric-card-dark .metric-num {
            font-family: var(--font-num);
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }
        .metric-card-dark .metric-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
        }
        /* ===== Steps Section ===== */
        .steps-section {
            padding: 64px 0 56px;
            background: var(--bg);
        }
        .section-head {
            margin-bottom: 36px;
            max-width: 640px;
        }
        .section-head h2 {
            font-size: clamp(24px, 2.5vw, 32px);
            font-weight: 800;
            letter-spacing: -0.015em;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 1rem;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.75;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--ink-soft);
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .steps-vertical {
            position: relative;
            max-width: 1050px;
            margin: 0 auto;
        }
        .steps-vertical::before {
            content: '';
            position: absolute;
            left: 56px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--line);
            border-radius: 1px;
        }
        .step-row {
            position: relative;
            display: grid;
            grid-template-columns: 120px 1fr 200px;
            gap: 20px;
            margin-bottom: 28px;
            padding-left: 8px;
            align-items: stretch;
        }
        .step-number-badge {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            position: relative;
            z-index: 2;
            padding-top: 8px;
        }
        .step-number-badge .step-icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--surface);
            border: 2px solid var(--line);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink-soft);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .step-row:hover .step-icon-circle {
            border-color: var(--accent);
            background: var(--primary);
            color: var(--accent);
            box-shadow: 0 0 0 4px var(--accent-dim);
        }
        .step-number-badge .step-label {
            font-size: 0.68rem;
            font-weight: 600;
            color: var(--ink-soft);
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }
        .step-main-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: all var(--transition-base);
        }
        .step-main-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .step-main-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--ink);
            margin: 0;
            line-height: 1.4;
        }
        .step-main-card p {
            font-size: 0.9rem;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.7;
        }
        .step-main-card .step-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .step-main-card .step-tag {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            background: var(--accent-dim);
            color: var(--ink);
            letter-spacing: 0.02em;
        }
        .step-main-card .step-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            max-height: 120px;
            width: 100%;
            object-fit: cover;
            margin-top: 4px;
        }
        .step-side-card {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 16px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: all var(--transition-base);
        }
        .step-side-card:hover {
            border-color: var(--accent-2);
            background: var(--surface);
        }
        .step-side-card .side-metric {
            font-family: var(--font-num);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.2;
        }
        .step-side-card .side-desc {
            font-size: 0.78rem;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.6;
        }
        .step-side-card .side-bar {
            height: 4px;
            background: var(--line);
            border-radius: 2px;
            overflow: hidden;
        }
        .step-side-card .side-bar .side-bar-fill {
            height: 100%;
            background: var(--accent);
            border-radius: 2px;
            transition: width var(--transition-slow);
        }
        /* ===== Channels Section ===== */
        .channels-section {
            padding: 56px 0 64px;
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .channels-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .channel-card {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: all var(--transition-base);
            cursor: default;
        }
        .channel-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            background: #fff;
        }
        .channel-thumb {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--line);
        }
        .channel-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .channel-info h4 {
            font-size: 0.98rem;
            font-weight: 700;
            margin-bottom: 2px;
            color: var(--ink);
        }
        .channel-info p {
            font-size: 0.78rem;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.5;
        }
        .channel-badge {
            font-size: 0.65rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 10px;
            background: var(--accent-dim);
            color: var(--ink);
            display: inline-block;
            margin-top: 4px;
        }
        /* ===== Quality Section ===== */
        .quality-section {
            padding: 64px 0;
            background: var(--bg-deep);
        }
        .quality-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 28px;
        }
        .quality-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            transition: all var(--transition-base);
        }
        .quality-card:hover {
            border-color: rgba(0, 208, 229, 0.35);
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }
        .quality-card .q-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--accent-2-dim);
            color: var(--accent-2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .quality-card h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .quality-card p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            margin: 0;
            line-height: 1.6;
        }
        .quality-card .q-value {
            font-family: var(--font-num);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 6px;
        }
        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion-custom .accordion-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--accent);
        }
        .accordion-custom .accordion-header {
            padding: 0;
            border: none;
            background: transparent;
        }
        .accordion-custom .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--ink);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            text-align: left;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--accent-dim);
            color: var(--ink);
            border-left: 3px solid var(--accent);
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-2);
            outline-offset: -2px;
        }
        .accordion-custom .accordion-button::after {
            display: none;
        }
        .accordion-custom .accordion-button .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--ink-soft);
            transition: transform var(--transition-base);
        }
        .accordion-custom .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(180deg);
            color: var(--ink);
        }
        .accordion-custom .accordion-body {
            padding: 0 20px 16px;
            font-size: 0.88rem;
            color: var(--ink-soft);
            line-height: 1.75;
            border-left: 3px solid var(--accent);
            margin-left: 0;
            background: var(--accent-dim);
        }
        /* ===== Conversion CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--bg-deep);
        }
        .cta-panel {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .cta-left h2 {
            font-size: clamp(22px, 2.2vw, 28px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .cta-left p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 14px;
            line-height: 1.7;
        }
        .cta-points {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .cta-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .cta-points li i {
            color: var(--accent);
            font-size: 0.7rem;
            flex-shrink: 0;
        }
        .cta-form-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--line);
        }
        .cta-form-card .form-label {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--ink-soft);
            margin-bottom: 4px;
        }
        .cta-form-card .form-control {
            height: 44px;
            border-radius: 8px;
            border: 1px solid var(--line);
            font-size: 0.88rem;
            color: var(--ink);
            padding: 0 14px;
            transition: all var(--transition-fast);
            background: var(--bg);
        }
        .cta-form-card .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(214, 255, 63, 0.15);
            outline: none;
            background: #fff;
        }
        .cta-form-card .form-control::placeholder {
            color: #a0a8b0;
        }
        .btn-submit-large {
            width: 100%;
            height: 46px;
            background: var(--primary);
            color: var(--accent);
            border: none;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.92rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all var(--transition-base);
            letter-spacing: 0.04em;
        }
        .btn-submit-large:hover {
            background: var(--bg-deep);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
            color: var(--accent);
        }
        .btn-submit-large:active {
            transform: scale(0.98);
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.6);
            padding: 42px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 24px;
        }
        .footer-brand {
            max-width: 320px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
        }
        .footer-brand p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.65;
            margin: 0;
        }
        .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }
        .footer-col a {
            display: block;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 16px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
        }
        .footer-legal-links {
            display: flex;
            gap: 14px;
        }
        .footer-legal-links a {
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-legal-links a:hover {
            color: var(--accent);
        }
        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .page-hero .hero-inner {
                grid-template-columns: 1fr;
            }
            .channels-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .quality-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-row {
                grid-template-columns: 80px 1fr;
                gap: 12px;
            }
            .step-side-card {
                grid-column: 2;
            }
            .steps-vertical::before {
                left: 38px;
            }
            .step-row .step-icon-circle {
                width: 44px;
                height: 44px;
                font-size: 1rem;
            }
            .cta-panel {
                grid-template-columns: 1fr;
                padding: 28px 24px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-h: 54px;
                --step-h: 36px;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .step-progress-item {
                font-size: 0.7rem;
            }
            .step-progress-item .step-dot {
                width: 18px;
                height: 18px;
                font-size: 0.55rem;
            }
            .page-hero {
                padding: 24px 0 32px;
            }
            .flash-sale-bar {
                padding: 12px 14px;
                gap: 10px;
            }
            .countdown-block {
                min-width: 38px;
                padding: 4px 6px;
            }
            .countdown-block .cd-num {
                font-size: 1rem;
            }
            .countdown-block .cd-label {
                font-size: 0.55rem;
            }
            .channels-grid {
                grid-template-columns: 1fr;
            }
            .quality-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .metric-card-dark {
                padding: 14px 10px;
            }
            .metric-card-dark .metric-num {
                font-size: 1.5rem;
            }
            .step-row {
                grid-template-columns: 1fr;
                gap: 10px;
                padding-left: 24px;
            }
            .steps-vertical::before {
                left: 14px;
            }
            .step-number-badge {
                flex-direction: row;
                justify-content: flex-start;
                gap: 8px;
                padding-top: 0;
                position: absolute;
                left: -24px;
                top: 8px;
            }
            .step-number-badge .step-icon-circle {
                width: 36px;
                height: 36px;
                font-size: 0.85rem;
            }
            .step-number-badge .step-label {
                display: none;
            }
            .step-main-card {
                padding: 16px 18px;
            }
            .step-side-card {
                grid-column: 1;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-panel {
                padding: 20px 16px;
            }
        }
        @media (max-width: 576px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .countdown-block {
                min-width: 32px;
            }
            .countdown-block .cd-num {
                font-size: 0.95rem;
            }
            .flash-match-info h5 {
                font-size: 0.8rem;
            }
            .flash-cta-btn {
                font-size: 0.72rem;
                padding: 8px 12px;
            }
            .btn-custom-primary,
            .btn-custom-secondary {
                font-size: 0.82rem;
                padding: 10px 16px;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                gap: 8px;
            }
        }
        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

/* roulang page: category4 */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 64px;
            --step-h: 42px;
            --filter-w: 260px;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + 16px);
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-h);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast), border var(--transition-fast);
        }
        a:hover {
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .container {
            max-width: 1280px;
        }
        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }
        .navbar-logo span.logo-text {
            color: var(--ink);
        }
        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(14px, 1.8vw, 24px);
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }
        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }
        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }
        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }
        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }
        .mobile-nav-panel {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 20px 24px;
            display: none;
            flex-direction: column;
            gap: 12px;
            z-index: 1049;
            max-height: calc(100vh - var(--header-h));
            overflow-y: auto;
            box-shadow: 0 12px 30px rgba(0,0,0,0.08);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 8px 4px;
            border-bottom: 1px solid var(--line);
        }
        .mobile-nav-panel a.active {
            color: var(--ink);
            font-weight: 700;
            border-bottom-color: var(--accent);
        }
        .mobile-nav-panel a:hover {
            color: var(--ink);
        }

        /* ===== Inner Hero ===== */
        .inner-hero {
            position: relative;
            background-image: linear-gradient(rgba(11,14,17,0.72), rgba(11,14,17,0.82)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 320px;
            display: flex;
            align-items: center;
            padding: 56px 0 48px;
            border-bottom: 1px solid var(--line);
        }
        .inner-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: rgba(255,255,255,0.7);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .sep {
            color: rgba(255,255,255,0.4);
        }
        .breadcrumb-custom .current {
            color: var(--accent);
            font-weight: 600;
        }
        .inner-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .inner-hero .hero-sub {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.82);
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 24px;
        }
        .hero-badge-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .hero-badge-group .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.18);
            color: #fff;
            font-size: 0.82rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 50px;
            transition: all var(--transition-fast);
        }
        .hero-badge-group .badge-pill:hover {
            background: rgba(214,255,63,0.15);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== Main Layout ===== */
        .catalog-section {
            padding: 56px 0 64px;
        }
        .catalog-layout {
            display: grid;
            grid-template-columns: var(--filter-w) 1fr;
            gap: 32px;
            align-items: start;
        }
        /* Filter Sidebar */
        .filter-sidebar {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            position: sticky;
            top: calc(var(--header-h) + 24px);
        }
        .filter-sidebar h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .filter-sidebar h3 i {
            color: var(--accent-2);
            font-size: 0.95rem;
        }
        .filter-group {
            margin-bottom: 22px;
        }
        .filter-group:last-child {
            margin-bottom: 0;
        }
        .filter-group label {
            font-size: 0.78rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--ink-soft);
            display: block;
            margin-bottom: 10px;
        }
        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 50px;
            padding: 6px 12px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--ink-soft);
            margin: 0 6px 8px 0;
            transition: all var(--transition-fast);
            cursor: pointer;
            user-select: none;
        }
        .filter-chip:hover {
            border-color: var(--accent);
            color: var(--ink);
            background: var(--surface);
        }
        .filter-chip.active {
            background: var(--primary);
            color: var(--accent);
            border-color: var(--primary);
        }
        .filter-chip .chip-count {
            font-family: var(--font-num);
            font-size: 0.72rem;
            font-weight: 600;
            opacity: 0.7;
        }
        .filter-reset {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: var(--signal);
            font-weight: 500;
            padding: 4px 0;
            transition: opacity var(--transition-fast);
        }
        .filter-reset:hover {
            opacity: 0.7;
        }

        /* Catalog List */
        .catalog-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .catalog-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: grid;
            grid-template-columns: 52px 88px 1fr auto;
            gap: 16px;
            align-items: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .catalog-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            width: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .catalog-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .catalog-item:hover::before {
            opacity: 1;
        }
        .catalog-item:focus-within {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
        }
        .item-number {
            font-family: var(--font-num);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--line);
            transition: color var(--transition-fast);
            letter-spacing: -0.02em;
            text-align: center;
        }
        .catalog-item:hover .item-number {
            color: var(--accent);
        }
        .item-thumb {
            width: 88px;
            height: 60px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .catalog-item:hover .item-thumb img {
            transform: scale(1.05);
        }
        .item-info {
            min-width: 0;
        }
        .item-info h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .item-info h3 .tag-mini {
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--accent-dim);
            color: var(--ink);
            padding: 2px 8px;
            border-radius: 50px;
        }
        .item-info .item-desc {
            font-size: 0.88rem;
            color: var(--ink-soft);
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .item-badges {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .item-badges .data-badge {
            font-family: var(--font-num);
            font-size: 0.76rem;
            font-weight: 600;
            background: var(--bg);
            border: 1px solid var(--line);
            color: var(--ink-soft);
            padding: 3px 10px;
            border-radius: 4px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }
        .item-badges .data-badge:hover {
            border-color: var(--accent-2);
            color: var(--ink);
        }
        .item-badges .data-badge i {
            font-size: 0.7rem;
            color: var(--accent-2);
        }
        .item-action {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 6px;
        }
        .item-action .heat-label {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--warning);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .item-action .btn-detail {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--ink);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 6px 14px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .item-action .btn-detail:hover {
            background: var(--primary);
            color: var(--accent);
            border-color: var(--primary);
        }

        /* ===== Data Strip ===== */
        .data-strip {
            background: var(--bg-deep);
            color: #fff;
            padding: 44px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .data-strip .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .strip-item {
            text-align: center;
            padding: 8px 12px;
            border-right: 1px solid rgba(255,255,255,0.1);
        }
        .strip-item:last-child {
            border-right: none;
        }
        .strip-item .strip-num {
            font-family: var(--font-num);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .strip-item .strip-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 56px 0;
            background: var(--surface);
        }
        .faq-section .section-header {
            margin-bottom: 32px;
        }
        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }
        .section-header p {
            color: var(--ink-soft);
            font-size: 1rem;
            max-width: 560px;
        }
        .accordion-custom .accordion-item {
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--surface);
            transition: border-color var(--transition-fast);
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--accent);
        }
        .accordion-custom .accordion-header {
            margin: 0;
        }
        .accordion-custom .accordion-button {
            background: var(--surface);
            color: var(--ink);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: all var(--transition-fast);
            position: relative;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg);
            color: var(--ink);
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed)::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--accent);
        }
        .accordion-custom .accordion-button::after {
            filter: none;
            opacity: 0.5;
            width: 0.9rem;
            height: 0.9rem;
            background-size: 0.9rem;
        }
        .accordion-custom .accordion-button:focus {
            outline: 2px solid var(--accent-2);
            outline-offset: -2px;
            box-shadow: none;
        }
        .accordion-custom .accordion-body {
            font-size: 0.92rem;
            color: var(--ink-soft);
            line-height: 1.8;
            padding: 16px 20px 20px;
            border-top: 1px solid var(--line);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-deep);
            color: #fff;
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(214,255,63,0.08), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 0.98rem;
            margin-bottom: 20px;
            max-width: 420px;
        }
        .cta-section .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            transition: all var(--transition-base);
            border: 1px solid transparent;
        }
        .cta-section .btn-primary-custom:hover {
            transform: translateY(-2px);
            background: #e4ff6b;
            box-shadow: 0 8px 20px rgba(214,255,63,0.25);
        }
        .cta-section .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            border: 1px solid rgba(255,255,255,0.3);
            transition: all var(--transition-base);
        }
        .cta-section .btn-secondary-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .cta-section .cta-points {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .cta-section .cta-points li {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.7);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .cta-section .cta-points li i {
            color: var(--accent);
            font-size: 0.75rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #080A0D;
            color: rgba(255,255,255,0.75);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 24px;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.65);
            margin-top: 12px;
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
        }
        .site-footer .footer-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
        }
        .site-footer .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.88rem;
            margin-bottom: 10px;
            transition: all var(--transition-fast);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 16px;
            font-size: 0.78rem;
            color: rgba(255,255,255,0.5);
        }
        .site-footer .footer-bottom .footer-legal-links {
            margin-left: auto;
            display: flex;
            gap: 16px;
        }
        .site-footer .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            :root {
                --filter-w: 220px;
            }
            .catalog-layout {
                gap: 20px;
            }
            .catalog-item {
                grid-template-columns: 42px 72px 1fr auto;
                gap: 12px;
                padding: 14px 16px;
            }
            .item-thumb {
                width: 72px;
                height: 52px;
            }
        }
        @media (max-width: 991px) {
            .catalog-layout {
                grid-template-columns: 1fr;
            }
            .filter-sidebar {
                position: static;
                display: flex;
                flex-wrap: wrap;
                gap: 10px;
                align-items: center;
                padding: 16px;
            }
            .filter-sidebar h3 {
                margin-bottom: 0;
                margin-right: 12px;
            }
            .filter-group {
                margin-bottom: 0;
                display: flex;
                align-items: center;
                gap: 4px;
                flex-wrap: wrap;
            }
            .filter-group label {
                margin-bottom: 0;
                margin-right: 8px;
            }
            .filter-chip {
                margin: 0 4px 4px 0;
            }
            .filter-reset {
                margin-left: auto;
            }
            .data-strip .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .strip-item:nth-child(2) {
                border-right: none;
            }
            .cta-section .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767px) {
            :root {
                --header-h: 56px;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .inner-hero {
                min-height: 260px;
                padding: 40px 0 36px;
            }
            .inner-hero h1 {
                font-size: 1.75rem;
            }
            .catalog-section {
                padding: 32px 0 40px;
            }
            .filter-sidebar {
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
            }
            .filter-sidebar h3 {
                margin-right: 0;
                margin-bottom: 8px;
            }
            .catalog-item {
                grid-template-columns: 36px 62px 1fr;
                gap: 10px;
                padding: 12px 14px;
            }
            .item-thumb {
                width: 62px;
                height: 46px;
            }
            .item-number {
                font-size: 1.15rem;
            }
            .item-action {
                grid-column: 2 / -1;
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                margin-top: 4px;
            }
            .item-info .item-desc {
                font-size: 0.82rem;
            }
            .data-strip .container {
                grid-template-columns: 1fr 1fr;
                padding: 0 16px;
            }
            .strip-item .strip-num {
                font-size: 1.6rem;
            }
            .cta-section {
                padding: 40px 0;
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .site-footer .footer-bottom .footer-legal-links {
                margin-left: 0;
                flex-wrap: wrap;
            }
            .breadcrumb-custom {
                font-size: 0.78rem;
            }
        }
        @media (max-width: 575px) {
            .catalog-item {
                grid-template-columns: 1fr;
                text-align: left;
            }
            .item-number {
                text-align: left;
                font-size: 1rem;
            }
            .item-thumb {
                width: 100%;
                height: 120px;
            }
            .item-action {
                grid-column: 1 / -1;
                flex-wrap: wrap;
            }
            .hero-badge-group .badge-pill {
                font-size: 0.72rem;
                padding: 4px 10px;
            }
            .data-strip .container {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .strip-item {
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.08);
                padding-bottom: 12px;
            }
            .strip-item:last-child {
                border-bottom: none;
            }
        }

/* roulang page: category5 */
:root {
            --bg: #F4F6F8;
            --bg-deep: #0B0E11;
            --surface: #FFFFFF;
            --surface-deep: #10141A;
            --line: #DDE3E8;
            --ink: #11161C;
            --ink-soft: #4B5560;
            --primary: #1B1F24;
            --accent: #D6FF3F;
            --accent-dim: rgba(214, 255, 63, 0.12);
            --accent-2: #00D0E5;
            --accent-2-dim: rgba(0, 208, 229, 0.12);
            --signal: #FF3D71;
            --warning: #FFB547;
            --radius-sm: 4px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --transition-slow: 240ms ease-out;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
            --header-h: 68px;
            --step-h: 48px;
        }
        :root {
            --header-h: 60px;
            --step-h: 42px;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-2);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1280px;
        }
        .container-fluid-custom {
            width: 100%;
            padding-left: clamp(16px, 4vw, 48px);
            padding-right: clamp(16px, 4vw, 48px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: var(--header-h);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .site-header .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--ink);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            letter-spacing: 0;
        }
        .navbar-logo span.logo-text {
            color: var(--ink);
        }
        .navbar-logo:hover {
            color: var(--ink);
            opacity: 0.85;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: clamp(16px, 2vw, 28px);
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .desktop-nav a.nav-link-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition-base);
        }
        .desktop-nav a.nav-link-item:hover::after,
        .desktop-nav a.nav-link-item.active::after {
            width: 100%;
        }
        .desktop-nav a.nav-link-item:hover {
            color: var(--ink);
        }
        .desktop-nav a.nav-link-item.active {
            color: var(--ink);
            font-weight: 600;
        }
        .mobile-toggle-btn {
            display: none;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--ink);
            transition: all var(--transition-fast);
        }
        .mobile-toggle-btn:hover {
            border-color: var(--accent);
            color: var(--ink);
        }
        .mobile-nav-panel {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 20px 24px;
            display: none;
            flex-direction: column;
            gap: 8px;
            z-index: 1049;
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: var(--accent-dim);
            color: var(--ink);
            font-weight: 600;
        }

        /* ===== Step Progress Nav ===== */
        .step-nav-bar {
            background: var(--bg-deep);
            height: var(--step-h);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            position: relative;
            z-index: 900;
        }
        .step-nav-bar .container {
            display: flex;
            align-items: center;
            gap: clamp(12px, 2vw, 24px);
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
        }
        .step-nav-bar .container::-webkit-scrollbar {
            height: 3px;
        }
        .step-nav-bar .container::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 4px;
        }
        .step-link {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.8rem;
            font-weight: 500;
            white-space: nowrap;
            padding: 6px 4px;
            transition: color var(--transition-fast);
            flex-shrink: 0;
            position: relative;
        }
        .step-link .step-dot {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.55rem;
            font-weight: 700;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .step-link:hover {
            color: var(--accent);
        }
        .step-link.active {
            color: var(--accent);
            font-weight: 600;
        }
        .step-link.active .step-dot {
            border-color: var(--accent);
            background: var(--accent);
            color: var(--bg-deep);
        }
        .step-link.completed {
            color: rgba(255, 255, 255, 0.75);
        }
        .step-link.completed .step-dot {
            border-color: var(--accent);
            color: var(--accent);
        }
        .step-link.completed .step-dot i {
            display: inline-block;
        }

        /* ===== Page Hero (Inner) ===== */
        .inner-hero {
            background: var(--surface);
            padding: 40px 0 24px;
            border-bottom: 1px solid var(--line);
        }
        .inner-hero .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--ink-soft);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .inner-hero .breadcrumb-row a {
            color: var(--ink-soft);
            transition: color var(--transition-fast);
        }
        .inner-hero .breadcrumb-row a:hover {
            color: var(--accent);
        }
        .inner-hero .breadcrumb-row .separator {
            color: var(--line);
            font-size: 0.7rem;
        }
        .inner-hero h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .inner-hero .hero-sub {
            font-size: 1.05rem;
            color: var(--ink-soft);
            max-width: 680px;
            line-height: 1.75;
        }

        /* ===== Metrics Mini Dashboard ===== */
        .metrics-mini {
            padding: 32px 0 48px;
            background: var(--bg);
        }
        .metrics-mini .metric-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            height: 100%;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .metrics-mini .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--accent);
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .metrics-mini .metric-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .metrics-mini .metric-card:hover::before {
            opacity: 1;
        }
        .metrics-mini .metric-value {
            font-family: var(--font-num);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .metrics-mini .metric-value .unit {
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink-soft);
        }
        .metrics-mini .metric-label {
            font-size: 0.88rem;
            color: var(--ink-soft);
            font-weight: 500;
        }
        .metrics-mini .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.78rem;
            font-weight: 600;
            color: #00A860;
            margin-top: 8px;
        }
        .metrics-mini .metric-trend.up {
            color: #00A860;
        }
        .metrics-mini .metric-trend.down {
            color: var(--signal);
        }

        /* ===== FAQ Section ===== */
        .faq-main-section {
            padding: 0 0 64px;
            background: var(--bg);
        }
        .faq-main-section .section-header {
            margin-bottom: 28px;
        }
        .faq-main-section .section-header h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .faq-main-section .section-header p {
            font-size: 0.95rem;
            color: var(--ink-soft);
            max-width: 620px;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--surface);
            transition: all var(--transition-base);
        }
        .faq-accordion .accordion-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .faq-accordion .accordion-button {
            background: var(--surface);
            border: none;
            padding: 18px 20px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--ink);
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all var(--transition-fast);
            position: relative;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--accent);
            box-shadow: none;
            border-left: 3px solid var(--accent);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-2);
            outline-offset: -2px;
        }
        .faq-accordion .accordion-button::after {
            filter: grayscale(1) brightness(0.3);
            transition: transform var(--transition-base);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            filter: none;
            transform: rotate(180deg);
        }
        .faq-accordion .faq-q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-accordion .faq-number {
            font-family: var(--font-num);
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--ink-soft);
            flex-shrink: 0;
            width: 32px;
            text-align: right;
        }
        .faq-accordion .accordion-body {
            padding: 16px 20px 20px 60px;
            font-size: 0.92rem;
            color: var(--ink-soft);
            line-height: 1.85;
            border-top: 1px solid var(--line);
            background: var(--bg);
        }

        /* ===== Side Conversion Card ===== */
        .conversion-side {
            position: sticky;
            top: calc(var(--header-h) + var(--step-h) + 20px);
        }
        .conversion-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-hover);
            transition: all var(--transition-base);
        }
        .conversion-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-dark);
        }
        .conversion-card .conv-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-dim);
            color: var(--ink);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        .conversion-card .conv-badge i {
            font-size: 0.7rem;
            color: var(--accent-2);
        }
        .conversion-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .conversion-card p {
            font-size: 0.88rem;
            color: var(--ink-soft);
            margin-bottom: 16px;
        }
        .conversion-card .conv-list {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }
        .conversion-card .conv-list li {
            font-size: 0.88rem;
            color: var(--ink-soft);
            padding: 8px 0;
            border-bottom: 1px solid var(--line);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .conversion-card .conv-list li i {
            color: var(--accent-2);
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .btn-conv-primary {
            display: block;
            width: 100%;
            background: var(--primary);
            color: var(--accent);
            border: 2px solid var(--primary);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            font-size: 1rem;
            font-weight: 700;
            transition: all var(--transition-base);
            text-align: center;
        }
        .btn-conv-primary:hover {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-conv-primary:active {
            transform: translateY(1px) scale(0.98);
            box-shadow: none;
        }
        .btn-conv-secondary {
            display: block;
            width: 100%;
            background: transparent;
            color: var(--ink);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 12px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all var(--transition-base);
            text-align: center;
            margin-top: 10px;
        }
        .btn-conv-secondary:hover {
            background: var(--bg);
            border-color: var(--accent-2);
            color: var(--accent-2);
        }

        /* ===== Bottom CTA Strip ===== */
        .bottom-cta-strip {
            background: var(--bg-deep);
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }
        .bottom-cta-strip::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(214, 255, 63, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta-strip h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .bottom-cta-strip p {
            color: rgba(255, 255, 255, 0.65);
            max-width: 600px;
            margin-bottom: 24px;
            font-size: 0.95rem;
        }
        .btn-cta-strip {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            border: 2px solid var(--accent);
            border-radius: var(--radius-md);
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            transition: all var(--transition-base);
        }
        .btn-cta-strip:hover {
            background: transparent;
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-dark);
        }
        .btn-cta-strip:active {
            transform: translateY(1px) scale(0.98);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 24px;
        }
        .site-footer .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .site-footer .footer-brand .footer-logo {
            font-family: var(--font-sans);
            font-weight: 900;
            font-size: 1.25rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .footer-logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .site-footer .footer-col h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom .footer-legal-links {
            display: flex;
            gap: 16px;
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition-fast);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header .desktop-nav {
                display: none;
            }
            .mobile-toggle-btn {
                display: flex;
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            .inner-hero {
                padding: 28px 0 16px;
            }
            .metrics-mini {
                padding: 24px 0 32px;
            }
            .faq-main-section {
                padding-bottom: 40px;
            }
            .faq-accordion .accordion-body {
                padding-left: 20px;
            }
            .site-footer .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .conversion-side {
                position: static;
                margin-bottom: 24px;
            }
            .bottom-cta-strip {
                padding: 40px 0;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 575.98px) {
            .metrics-mini .metric-card {
                padding: 16px 18px;
            }
            .metrics-mini .metric-value {
                font-size: 1.7rem;
            }
            .step-nav-bar .container {
                gap: 16px;
            }
            .step-link {
                font-size: 0.72rem;
            }
        }

/* roulang page: category6 */
:root {
        --bg: #F4F6F8;
        --bg-deep: #0B0E11;
        --surface: #FFFFFF;
        --surface-deep: #10141A;
        --line: #DDE3E8;
        --ink: #11161C;
        --ink-soft: #4B5560;
        --primary: #1B1F24;
        --accent: #D6FF3F;
        --accent-dim: rgba(214, 255, 63, 0.12);
        --accent-2: #00D0E5;
        --accent-2-dim: rgba(0, 208, 229, 0.12);
        --signal: #FF3D71;
        --warning: #FFB547;
        --radius-sm: 4px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
        --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
        --transition-fast: 160ms ease-out;
        --transition-base: 200ms ease-out;
        --transition-slow: 240ms ease-out;
        --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        --font-num: 'Inter', 'Bebas Neue', 'DIN Alternate', monospace;
        --header-h: 60px;
        --step-h: 42px;
    }
    html {
        scroll-behavior: smooth;
        scroll-padding-top: calc(var(--header-h) + var(--step-h) + 16px);
    }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.8;
        color: var(--ink);
        background-color: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
        padding-top: calc(var(--header-h) + var(--step-h));
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color var(--transition-fast), opacity var(--transition-fast);
    }
    a:hover {
        text-decoration: none;
    }
    button {
        font-family: inherit;
        cursor: pointer;
    }
    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
        outline: 2px solid var(--accent-2);
        outline-offset: 2px;
        border-radius: var(--radius-sm);
    }
    .container {
        max-width: 1280px;
    }
    .container-fluid-custom {
        width: 100%;
        padding-left: clamp(16px, 4vw, 48px);
        padding-right: clamp(16px, 4vw, 48px);
    }

    /* ===== Header / Nav ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1050;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--line);
        height: var(--header-h);
        transition: box-shadow var(--transition-base);
    }
    .site-header.scrolled {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }
    .site-header .container {
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .navbar-logo {
        font-family: var(--font-sans);
        font-weight: 900;
        font-size: 1.35rem;
        letter-spacing: -0.02em;
        color: var(--ink);
        display: flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;
    }
    .navbar-logo .logo-mark {
        width: 36px;
        height: 36px;
        background: var(--primary);
        color: var(--accent);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.85rem;
        font-weight: 800;
        letter-spacing: 0;
    }
    .navbar-logo span.logo-text {
        color: var(--ink);
    }
    .navbar-logo:hover {
        color: var(--ink);
        opacity: 0.85;
    }
    .desktop-nav {
        display: flex;
        align-items: center;
        gap: clamp(12px, 1.6vw, 24px);
    }
    .desktop-nav a.nav-link-item {
        font-size: 0.85rem;
        font-weight: 500;
        color: var(--ink-soft);
        padding: 6px 2px;
        position: relative;
        white-space: nowrap;
    }
    .desktop-nav a.nav-link-item::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent);
        transition: width var(--transition-base);
    }
    .desktop-nav a.nav-link-item:hover::after,
    .desktop-nav a.nav-link-item.active::after {
        width: 100%;
    }
    .desktop-nav a.nav-link-item:hover {
        color: var(--ink);
    }
    .desktop-nav a.nav-link-item.active {
        color: var(--ink);
        font-weight: 600;
    }
    .mobile-toggle-btn {
        display: none;
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius-sm);
        width: 40px;
        height: 40px;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: var(--ink);
        transition: all var(--transition-fast);
    }
    .mobile-toggle-btn:hover {
        border-color: var(--accent);
        color: var(--ink);
    }
    .mobile-nav-panel {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: var(--surface);
        border-bottom: 1px solid var(--line);
        padding: 16px 20px 24px;
        display: none;
        flex-direction: column;
        gap: 4px;
        z-index: 1049;
    }
    .mobile-nav-panel.open {
        display: flex;
    }
    .mobile-nav-panel a {
        padding: 12px 4px;
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--ink-soft);
        border-bottom: 1px solid var(--line);
        transition: all var(--transition-fast);
    }
    .mobile-nav-panel a:last-child {
        border-bottom: none;
    }
    .mobile-nav-panel a:hover,
    .mobile-nav-panel a.active {
        color: var(--ink);
        background: var(--accent-dim);
        padding-left: 12px;
    }

    /* ===== Step Progress Nav ===== */
    .step-progress-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        z-index: 1048;
        background: var(--surface);
        border-bottom: 1px solid var(--line);
        height: var(--step-h);
        display: flex;
        align-items: center;
    }
    .step-progress-nav .step-inner {
        display: flex;
        align-items: center;
        gap: 0;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .step-progress-nav .step-inner::-webkit-scrollbar {
        display: none;
    }
    .step-progress-nav .step-item {
        display: flex;
        align-items: center;
        gap: 8px;
        white-space: nowrap;
        font-size: 0.78rem;
        font-weight: 500;
        color: var(--ink-soft);
        padding: 0 16px;
        height: var(--step-h);
        position: relative;
        cursor: pointer;
        transition: color var(--transition-fast);
        flex-shrink: 0;
    }
    .step-progress-nav .step-item::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 16px;
        right: 16px;
        height: 2px;
        background: transparent;
        transition: background var(--transition-base);
    }
    .step-progress-nav .step-item.active {
        color: var(--ink);
        font-weight: 700;
    }
    .step-progress-nav .step-item.active::after {
        background: var(--accent);
    }
    .step-progress-nav .step-item .step-num {
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: var(--line);
        color: var(--ink-soft);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.65rem;
        font-weight: 700;
        font-family: var(--font-num);
        flex-shrink: 0;
        transition: all var(--transition-fast);
    }
    .step-progress-nav .step-item.active .step-num {
        background: var(--accent);
        color: var(--primary);
    }
    .step-progress-nav .step-connector {
        flex-shrink: 0;
        width: 16px;
        height: 1px;
        background: var(--line);
    }

    /* ===== Page Specific Hero ===== */
    .svc-hero {
        background-image: url('/assets/images/backpic/back-3.webp');
        background-size: cover;
        background-position: center;
        position: relative;
        color: #FFFFFF;
        padding: 72px 0 64px;
        overflow: hidden;
    }
    .svc-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(11, 14, 17, 0.55);
        z-index: 1;
    }
    .svc-hero .container {
        position: relative;
        z-index: 2;
    }
    .svc-hero .breadcrumb-custom {
        font-size: 0.78rem;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .svc-hero .breadcrumb-custom a {
        color: rgba(255, 255, 255, 0.6);
        transition: color var(--transition-fast);
    }
    .svc-hero .breadcrumb-custom a:hover {
        color: var(--accent);
    }
    .svc-hero .breadcrumb-custom i {
        font-size: 0.55rem;
        opacity: 0.5;
    }
    .svc-hero h1 {
        font-size: clamp(2rem, 4vw, 3rem);
        font-weight: 900;
        letter-spacing: -0.02em;
        line-height: 1.2;
        margin-bottom: 16px;
        color: #FFFFFF;
    }
    .svc-hero h1 .accent-text {
        color: var(--accent);
    }
    .svc-hero .hero-sub {
        font-size: 1.05rem;
        color: rgba(255, 255, 255, 0.8);
        max-width: 560px;
        margin-bottom: 24px;
    }
    .svc-hero .hero-desc {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.65);
        max-width: 520px;
        line-height: 1.7;
    }

    /* Metrics Cards Dark */
    .metrics-dark-row {
        margin-top: 32px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
    }
    .metric-dark-card {
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: var(--radius-md);
        padding: 16px 18px;
        transition: all var(--transition-base);
    }
    .metric-dark-card:hover {
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(214, 255, 63, 0.4);
        transform: translateY(-3px);
    }
    .metric-dark-card .md-num {
        font-family: var(--font-num);
        font-size: 2rem;
        font-weight: 700;
        color: var(--accent);
        line-height: 1.1;
        margin-bottom: 6px;
    }
    .metric-dark-card .md-label {
        font-size: 0.78rem;
        color: rgba(255, 255, 255, 0.6);
        font-weight: 500;
    }
    .metric-dark-card .md-sub {
        font-size: 0.7rem;
        color: rgba(255, 255, 255, 0.4);
        margin-top: 4px;
    }

    /* Form Panel */
    .svc-form-panel {
        background: var(--surface);
        border-radius: var(--radius-lg);
        padding: 28px 32px;
        border: 1px solid var(--line);
        box-shadow: var(--shadow-dark);
    }
    .svc-form-panel h3 {
        font-size: 1.2rem;
        font-weight: 800;
        color: var(--ink);
        margin-bottom: 6px;
    }
    .svc-form-panel .form-intro {
        font-size: 0.82rem;
        color: var(--ink-soft);
        margin-bottom: 20px;
    }
    .svc-form-panel .form-label {
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--ink-soft);
        margin-bottom: 4px;
    }
    .svc-form-panel .form-control,
    .svc-form-panel .form-select {
        height: 46px;
        border-radius: 8px;
        border: 1px solid var(--line);
        font-size: 0.9rem;
        color: var(--ink);
        transition: all var(--transition-fast);
        background: var(--bg);
    }
    .svc-form-panel .form-control:focus,
    .svc-form-panel .form-select:focus {
        border-color: var(--accent-2);
        box-shadow: 0 0 0 3px rgba(0, 208, 229, 0.15);
        background: var(--surface);
    }
    .svc-form-panel textarea.form-control {
        height: auto;
        min-height: 80px;
        resize: vertical;
    }
    .btn-svc-submit {
        background: var(--primary);
        color: var(--accent);
        border: 1px solid var(--primary);
        border-radius: 8px;
        height: 48px;
        font-weight: 700;
        font-size: 0.95rem;
        transition: all var(--transition-base);
        width: 100%;
        letter-spacing: 0.02em;
    }
    .btn-svc-submit:hover {
        background: #2A3037;
        border-color: var(--accent);
        color: var(--accent);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }
    .btn-svc-submit:active {
        transform: translateY(1px);
        box-shadow: none;
    }
    .btn-svc-outline {
        background: transparent;
        color: var(--ink);
        border: 1px solid var(--line);
        border-radius: 8px;
        height: 44px;
        font-weight: 600;
        font-size: 0.88rem;
        transition: all var(--transition-base);
    }
    .btn-svc-outline:hover {
        border-color: var(--accent);
        background: var(--accent-dim);
        color: var(--ink);
    }
    .btn-svc-outline:active {
        transform: scale(0.98);
    }

    /* Section Base */
    .section-block {
        padding: 56px 0;
    }
    .section-block.section-white {
        background: var(--surface);
    }
    .section-block.section-light {
        background: var(--bg);
    }
    .section-block.section-dark {
        background: var(--bg-deep);
        color: #FFFFFF;
    }
    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.06em;
        color: var(--ink-soft);
        text-transform: uppercase;
        margin-bottom: 10px;
    }
    .section-label .label-dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--accent-2);
    }
    .section-title {
        font-size: clamp(1.5rem, 2.5vw, 2.1rem);
        font-weight: 800;
        letter-spacing: -0.015em;
        color: var(--ink);
        margin-bottom: 12px;
        line-height: 1.3;
    }
    .section-dark .section-title {
        color: #FFFFFF;
    }
    .section-desc {
        font-size: 0.95rem;
        color: var(--ink-soft);
        max-width: 680px;
        line-height: 1.75;
    }
    .section-dark .section-desc {
        color: rgba(255, 255, 255, 0.65);
    }

    /* Horizontal Metric Bars */
    .metric-bar-list {
        display: flex;
        flex-direction: column;
        gap: 18px;
        margin-top: 28px;
    }
    .metric-bar-item {
        display: grid;
        grid-template-columns: 140px 1fr 90px;
        gap: 16px;
        align-items: center;
    }
    .metric-bar-item .bar-name {
        font-weight: 700;
        font-size: 0.9rem;
        color: var(--ink);
        white-space: nowrap;
    }
    .metric-bar-item .bar-track {
        height: 10px;
        background: var(--line);
        border-radius: 999px;
        overflow: hidden;
        position: relative;
    }
    .metric-bar-item .bar-fill {
        height: 100%;
        border-radius: 999px;
        background: var(--accent-2);
        transition: width var(--transition-slow);
        position: relative;
    }
    .metric-bar-item .bar-fill.accent {
        background: var(--accent);
    }
    .metric-bar-item .bar-fill.signal {
        background: var(--signal);
    }
    .metric-bar-item .bar-val {
        font-family: var(--font-num);
        font-weight: 700;
        font-size: 0.95rem;
        color: var(--ink);
        text-align: right;
        white-space: nowrap;
    }
    .section-dark .metric-bar-item .bar-name {
        color: #FFFFFF;
    }
    .section-dark .metric-bar-item .bar-track {
        background: rgba(255, 255, 255, 0.12);
    }
    .section-dark .metric-bar-item .bar-val {
        color: #FFFFFF;
    }

    /* Flow Steps */
    .svc-flow-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
        margin-top: 32px;
    }
    .svc-flow-step {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        padding: 24px 20px;
        position: relative;
        transition: all var(--transition-base);
    }
    .svc-flow-step:hover {
        border-color: var(--accent);
        box-shadow: var(--shadow-hover);
        transform: translateY(-3px);
    }
    .svc-flow-step .step-number {
        font-family: var(--font-num);
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--accent-2);
        line-height: 1;
        margin-bottom: 12px;
    }
    .svc-flow-step .step-title {
        font-size: 1rem;
        font-weight: 700;
        color: var(--ink);
        margin-bottom: 8px;
    }
    .svc-flow-step .step-desc {
        font-size: 0.82rem;
        color: var(--ink-soft);
        line-height: 1.65;
    }
    .svc-flow-step .step-icon {
        position: absolute;
        top: 16px;
        right: 16px;
        font-size: 1.2rem;
        color: var(--line);
    }

    /* Coverage Area */
    .coverage-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        align-items: center;
        margin-top: 28px;
    }
    .coverage-wrapper .coverage-img {
        border-radius: var(--radius-md);
        overflow: hidden;
        border: 1px solid var(--line);
    }
    .coverage-wrapper .coverage-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        aspect-ratio: 16/10;
    }
    .coverage-wrapper .coverage-list {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .coverage-wrapper .cov-item {
        display: flex;
        gap: 14px;
        align-items: flex-start;
        padding: 14px 16px;
        background: var(--bg);
        border-radius: var(--radius-md);
        border: 1px solid var(--line);
        transition: all var(--transition-fast);
    }
    .coverage-wrapper .cov-item:hover {
        border-color: var(--accent-2);
        background: var(--surface);
    }
    .coverage-wrapper .cov-item i {
        font-size: 1.1rem;
        color: var(--accent-2);
        margin-top: 4px;
        flex-shrink: 0;
    }
    .coverage-wrapper .cov-item .cov-text {
        font-size: 0.88rem;
        color: var(--ink-soft);
        line-height: 1.6;
    }
    .coverage-wrapper .cov-item .cov-text strong {
        color: var(--ink);
        font-weight: 700;
        display: block;
        margin-bottom: 2px;
    }

    /* FAQ */
    .faq-accordion .accordion-item {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: var(--radius-md) !important;
        margin-bottom: 10px;
        overflow: hidden;
    }
    .faq-accordion .accordion-button {
        background: var(--surface);
        color: var(--ink);
        font-weight: 600;
        font-size: 0.95rem;
        padding: 18px 20px;
        border: none;
        box-shadow: none;
        border-radius: var(--radius-md) !important;
        transition: all var(--transition-fast);
        position: relative;
        text-align: left;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
        background: var(--accent-dim);
        color: var(--ink);
        box-shadow: none;
        border-left: 3px solid var(--accent);
    }
    .faq-accordion .accordion-button:hover {
        background: var(--bg);
    }
    .faq-accordion .accordion-button:focus {
        box-shadow: none;
        outline: 2px solid var(--accent-2);
        outline-offset: -2px;
    }
    .faq-accordion .accordion-button::after {
        filter: none;
        opacity: 0.5;
        transition: transform var(--transition-base);
    }
    .faq-accordion .accordion-body {
        padding: 16px 20px 20px;
        font-size: 0.88rem;
        color: var(--ink-soft);
        line-height: 1.75;
        border-top: 1px solid var(--line);
    }

    /* CTA Dark */
    .cta-dark-banner {
        background: var(--bg-deep);
        border-radius: var(--radius-lg);
        padding: 40px 48px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
        border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .cta-dark-banner .cta-content h2 {
        font-size: 1.5rem;
        font-weight: 800;
        color: #FFFFFF;
        margin-bottom: 8px;
    }
    .cta-dark-banner .cta-content p {
        font-size: 0.88rem;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 0;
        max-width: 480px;
    }
    .btn-cta-accent {
        background: var(--accent);
        color: var(--primary);
        border: 1px solid var(--accent);
        border-radius: 8px;
        height: 48px;
        font-weight: 700;
        font-size: 0.95rem;
        padding: 0 28px;
        transition: all var(--transition-base);
        white-space: nowrap;
    }
    .btn-cta-accent:hover {
        background: #c8f02e;
        border-color: #c8f02e;
        transform: translateY(-2px);
        box-shadow: 0 6px 24px rgba(214, 255, 63, 0.25);
        color: var(--primary);
    }
    .btn-cta-accent:active {
        transform: translateY(1px);
        box-shadow: none;
    }

    /* Footer */
    .site-footer {
        background: var(--bg-deep);
        color: rgba(255, 255, 255, 0.7);
        padding: 48px 0 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-footer .footer-top {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 32px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-footer .footer-brand .footer-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 900;
        font-size: 1.2rem;
        color: #FFFFFF;
        margin-bottom: 14px;
    }
    .site-footer .footer-brand .footer-logo .logo-mark {
        width: 32px;
        height: 32px;
        background: var(--accent);
        color: var(--primary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.75rem;
        font-weight: 800;
    }
    .site-footer .footer-brand p {
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.55);
        max-width: 320px;
        line-height: 1.7;
        margin-bottom: 0;
    }
    .site-footer .footer-col h5 {
        font-size: 0.78rem;
        font-weight: 700;
        color: #FFFFFF;
        letter-spacing: 0.04em;
        margin-bottom: 14px;
    }
    .site-footer .footer-col a {
        display: block;
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.55);
        padding: 5px 0;
        transition: all var(--transition-fast);
    }
    .site-footer .footer-col a:hover {
        color: var(--accent);
        padding-left: 6px;
    }
    .site-footer .footer-bottom {
        padding-top: 20px;
        display: flex;
        flex-wrap: wrap;
        gap: 10px 20px;
        font-size: 0.72rem;
        color: rgba(255, 255, 255, 0.4);
        align-items: center;
    }
    .site-footer .footer-legal-links {
        display: flex;
        gap: 16px;
    }
    .site-footer .footer-legal-links a {
        color: rgba(255, 255, 255, 0.4);
        font-size: 0.72rem;
        transition: color var(--transition-fast);
    }
    .site-footer .footer-legal-links a:hover {
        color: var(--accent);
    }

    /* Legend / Badge */
    .svc-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 10px;
        border-radius: 999px;
        font-size: 0.7rem;
        font-weight: 600;
        letter-spacing: 0.02em;
    }
    .svc-badge.badge-green {
        background: var(--accent-dim);
        color: #5a6b00;
        border: 1px solid rgba(214, 255, 63, 0.5);
    }
    .svc-badge.badge-cyan {
        background: var(--accent-2-dim);
        color: #007a87;
        border: 1px solid rgba(0, 208, 229, 0.5);
    }
    .svc-badge.badge-red {
        background: rgba(255, 61, 113, 0.1);
        color: #b5234d;
        border: 1px solid rgba(255, 61, 113, 0.4);
    }
    .svc-badge.badge-warm {
        background: rgba(255, 181, 71, 0.12);
        color: #9a6a1a;
        border: 1px solid rgba(255, 181, 71, 0.5);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1199px) {
        .desktop-nav {
            gap: 12px;
        }
        .desktop-nav a.nav-link-item {
            font-size: 0.78rem;
        }
    }
    @media (max-width: 991px) {
        .desktop-nav {
            display: none;
        }
        .mobile-toggle-btn {
            display: flex;
        }
        .metrics-dark-row {
            grid-template-columns: repeat(2, 1fr);
        }
        .svc-flow-steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .coverage-wrapper {
            grid-template-columns: 1fr;
        }
        .site-footer .footer-top {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .svg-hero {
            padding: 56px 0 48px;
        }
        .cta-dark-banner {
            padding: 32px 28px;
            flex-direction: column;
            text-align: center;
        }
    }
    @media (max-width: 767px) {
        body {
            padding-top: calc(var(--header-h) + var(--step-h));
        }
        .svc-hero {
            padding: 48px 0 40px;
        }
        .svc-hero h1 {
            font-size: 1.7rem;
        }
        .metrics-dark-row {
            grid-template-columns: repeat(2, 1fr);
            gap: 8px;
        }
        .metric-dark-card {
            padding: 12px 14px;
        }
        .metric-dark-card .md-num {
            font-size: 1.5rem;
        }
        .svc-form-panel {
            padding: 20px 18px;
        }
        .section-block {
            padding: 40px 0;
        }
        .metric-bar-item {
            grid-template-columns: 1fr;
            gap: 8px;
        }
        .metric-bar-item .bar-val {
            text-align: left;
        }
        .svc-flow-steps {
            grid-template-columns: 1fr;
        }
        .site-footer .footer-top {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .cta-dark-banner {
            padding: 24px 18px;
        }
        .step-progress-nav .step-item {
            font-size: 0.68rem;
            padding: 0 10px;
        }
        .step-progress-nav .step-item .step-num {
            width: 16px;
            height: 16px;
            font-size: 0.55rem;
        }
        .step-progress-nav .step-connector {
            width: 8px;
        }
        .mobile-nav-panel {
            max-height: calc(100vh - var(--header-h) - var(--step-h));
            overflow-y: auto;
        }
    }
    @media (max-width: 575px) {
        .metrics-dark-row {
            grid-template-columns: 1fr 1fr;
            gap: 6px;
        }
        .metric-dark-card .md-num {
            font-size: 1.3rem;
        }
        .metric-dark-card .md-label {
            font-size: 0.7rem;
        }
        .section-title {
            font-size: 1.3rem;
        }
        .svc-form-panel .btn-svc-submit {
            font-size: 0.85rem;
        }
        .site-footer .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }
    }