/* roulang page: index */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 68px;
            --bottom-tab-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }

        a:hover {
            color: var(--neon);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }

        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }

        .text-glow {
            color: var(--neon);
            text-shadow: 0 0 8px rgba(0, 240, 160, 0.4);
        }

        .numeric {
            font-family: var(--font-numeric);
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.01em;
        }

        .badge-neon {
            background: rgba(0, 240, 160, 0.12);
            color: var(--neon);
            border: 1px solid rgba(0, 240, 160, 0.3);
        }

        .badge-electric {
            background: rgba(26, 139, 255, 0.12);
            color: var(--electric);
            border: 1px solid rgba(26, 139, 255, 0.3);
        }

        .badge-gold {
            background: rgba(255, 180, 84, 0.12);
            color: var(--gold);
            border: 1px solid rgba(255, 180, 84, 0.3);
        }

        .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: 0;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 32px;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head-center {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .section-head-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #F5F7FA;
            font-weight: 800;
            font-size: 19px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-link:hover {
            color: var(--neon);
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #00F0A0, #1A8BFF);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #0A0E1A;
            flex-shrink: 0;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .desktop-nav a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 6px;
            position: relative;
            white-space: nowrap;
            transition: color 0.25s ease, background 0.25s ease;
        }

        .desktop-nav a:hover {
            color: #F5F7FA;
            background: rgba(255, 255, 255, 0.06);
        }

        .desktop-nav a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }

        .desktop-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--neon);
            border-radius: 999px;
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.5);
        }

        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            flex-shrink: 0;
        }

        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: #F5F7FA;
            border-radius: 999px;
            transition: all 0.3s ease;
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 99;
            background: rgba(10, 14, 26, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 24px 20px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            border-radius: 10px;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-menu a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }

        /* Bottom tab nav */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            height: calc(var(--bottom-tab-height) + env(safe-area-inset-bottom, 0px));
            padding-bottom: env(safe-area-inset-bottom, 0px);
            background: rgba(10, 14, 26, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glass);
            display: none;
        }

        .bottom-tab-inner {
            display: flex;
            align-items: stretch;
            justify-content: space-around;
            height: 64px;
            max-width: 600px;
            margin: 0 auto;
        }

        .bottom-tab-inner a {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--text-muted);
            font-size: 11px;
            font-weight: 500;
            transition: color 0.25s ease;
        }

        .bottom-tab-inner a.active {
            color: var(--neon);
        }

        .bottom-tab-inner a svg {
            width: 22px;
            height: 22px;
            transition: color 0.25s ease;
        }

        .bottom-tab-inner a.active svg {
            color: var(--neon);
            filter: drop-shadow(0 0 6px rgba(0, 240, 160, 0.6));
        }

        /* Hero */
        .hero-section {
            position: relative;
            padding-top: 72px;
            padding-bottom: 72px;
            overflow: hidden;
            background-image: url('/assets/images/4e81646140f84849.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92) 0%, rgba(10, 14, 26, 0.78) 40%, rgba(10, 14, 26, 0.95) 100%);
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 40px;
            align-items: flex-start;
        }

        .hero-content {
            max-width: 680px;
        }

        .hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 0;
            color: #F5F7FA;
            margin-bottom: 20px;
        }

        .hero-title .highlight {
            color: var(--neon);
            text-shadow: 0 0 16px rgba(0, 240, 160, 0.5);
        }

        .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 600px;
        }

        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .hero-comparison {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            width: 100%;
            max-width: 820px;
        }

        .hero-comp-card {
            padding: 20px;
            border-radius: 14px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .hero-comp-card.win-side {
            border-color: rgba(0, 240, 160, 0.4);
            background: rgba(0, 240, 160, 0.08);
            box-shadow: 0 0 18px rgba(0, 240, 160, 0.15);
        }

        .hero-comp-label {
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .hero-comp-card.win-side .hero-comp-label {
            color: var(--neon);
        }
        .hero-comp-card:not(.win-side) .hero-comp-label {
            color: var(--text-muted);
        }

        .hero-comp-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .hero-stat-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(0, 240, 160, 0.1);
            border: 1px solid rgba(0, 240, 160, 0.25);
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--neon);
            margin-bottom: 20px;
        }

        /* Metric board */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            text-align: center;
            padding: 28px 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .metric-value {
            font-family: var(--font-numeric);
            font-size: 40px;
            font-weight: 700;
            line-height: 1;
            color: #F5F7FA;
            background: linear-gradient(135deg, #F5F7FA 20%, #00F0A0 90%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-trend {
            font-size: 13px;
            font-weight: 600;
            color: var(--neon);
        }

        .metric-trend.down {
            color: var(--danger);
        }

        /* Service matrix */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .service-card {
            display: flex;
            flex-direction: column;
            gap: 12px;
            padding: 24px;
        }

        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(0, 240, 160, 0.1);
            border: 1px solid rgba(0, 240, 160, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon);
            flex-shrink: 0;
        }

        .service-title {
            font-size: 18px;
            font-weight: 700;
            color: #F5F7FA;
            margin: 0;
        }

        .service-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--electric);
            margin-top: auto;
        }

        .service-link:hover {
            color: var(--neon);
        }

        /* Comparison table */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .comparison-col {
            padding: 28px;
            border-radius: 14px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.03);
        }

        .comparison-col.winner {
            border-color: rgba(0, 240, 160, 0.45);
            background: rgba(0, 240, 160, 0.06);
            box-shadow: 0 0 20px rgba(0, 240, 160, 0.12);
        }

        .comparison-col-header {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .comparison-col.winner .comparison-col-header {
            color: var(--neon);
        }
        .comparison-col:not(.winner) .comparison-col-header {
            color: var(--text-muted);
        }

        .comparison-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .comparison-col:last-child .comparison-item:last-child {
            border-bottom: none;
        }

        /* Brand intro */
        .brand-intro-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
        }

        .brand-intro-img {
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid var(--border-glass);
            aspect-ratio: 4/3;
            background-size: cover;
            background-position: center;
        }

        .brand-intro-text {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .brand-intro-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Timeline */
        .timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .timeline-item {
            display: flex;
            flex-direction: column;
            gap: 10px;
            padding: 20px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            position: relative;
        }

        .timeline-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--neon);
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.6);
            position: absolute;
            top: -5px;
            left: 50%;
            transform: translateX(-50%);
        }

        .timeline-year {
            font-family: var(--font-numeric);
            font-size: 22px;
            font-weight: 700;
            color: var(--neon);
            letter-spacing: 0.02em;
        }

        .timeline-event {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* News list */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            display: flex;
            flex-direction: column;
            gap: 14px;
            overflow: hidden;
        }

        .news-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            border-radius: 10px;
            overflow: hidden;
            object-fit: cover;
        }

        .news-card-title {
            font-size: 16px;
            font-weight: 700;
            color: #F5F7FA;
            line-height: 1.5;
            margin: 0;
        }

        .news-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

        .news-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--electric);
        }
        .news-card-link:hover {
            color: var(--neon);
        }

        .view-more-row {
            display: flex;
            justify-content: flex-end;
            margin-top: 24px;
        }

        /* Guarantee */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .guarantee-item {
            display: flex;
            flex-direction: column;
            gap: 10px;
            padding: 20px;
            text-align: center;
            align-items: center;
        }

        .guarantee-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(0, 240, 160, 0.1);
            border: 1px solid rgba(0, 240, 160, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon);
        }

        .guarantee-title {
            font-size: 15px;
            font-weight: 700;
            color: #F5F7FA;
        }

        .guarantee-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Quick answers */
        .quick-answers-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .quick-answer-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .quick-answer-item:hover {
            border-color: rgba(0, 240, 160, 0.3);
            background: rgba(0, 240, 160, 0.04);
        }

        .quick-answer-q {
            font-size: 14px;
            font-weight: 700;
            color: #F5F7FA;
            min-width: 60px;
        }

        .quick-answer-a {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* FAQ accordion */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.2);
        }

        .faq-item.active {
            border-color: rgba(0, 240, 160, 0.5);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: #F5F7FA;
            text-align: left;
            cursor: pointer;
            transition: color 0.25s ease, background 0.25s ease;
            background: transparent;
        }

        .faq-question:hover {
            color: var(--neon);
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform 0.3s ease;
            color: var(--text-muted);
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--neon);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px 20px;
        }

        /* Form */
        .cta-form-wrap {
            max-width: 560px;
            margin: 0 auto;
            padding: 32px;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(0, 240, 160, 0.25);
            border-radius: 16px;
            box-shadow: 0 0 24px rgba(0, 240, 160, 0.08);
        }

        .cta-form-title {
            font-size: 20px;
            font-weight: 700;
            color: #F5F7FA;
            text-align: center;
            margin-bottom: 8px;
        }

        .cta-form-sub {
            font-size: 14px;
            color: var(--text-secondary);
            text-align: center;
            margin-bottom: 20px;
        }

        .cta-form-row {
            display: flex;
            gap: 10px;
            align-items: stretch;
        }

        .cta-input {
            flex: 1;
            min-height: 44px;
            padding: 10px 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            font-size: 15px;
            color: #F5F7FA;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .cta-input::placeholder {
            color: var(--text-muted);
        }
        .cta-input:focus {
            border-color: var(--neon);
            box-shadow: 0 0 10px rgba(0, 240, 160, 0.2);
        }

        /* Scene topics */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scene-card {
            display: flex;
            flex-direction: column;
            gap: 14px;
            padding: 28px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 14px;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .scene-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(0, 240, 160, 0.3);
        }

        .scene-card-icon {
            font-size: 28px;
            line-height: 1;
        }

        .scene-card-title {
            font-size: 18px;
            font-weight: 700;
            color: #F5F7FA;
        }

        .scene-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .scene-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--electric);
            margin-top: auto;
        }
        .scene-card-link:hover {
            color: var(--neon);
        }

        /* Trust bar */
        .trust-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 24px 40px;
            padding: 24px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: 14px;
        }

        .trust-item {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .trust-item-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--neon);
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: #0A0E1A;
            border-top: 1px solid var(--border-glass);
            padding-top: 48px;
            padding-bottom: 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: #F5F7FA;
            margin-bottom: 14px;
        }

        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.25s ease;
        }

        .footer-col-links a:hover {
            color: var(--neon);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            align-items: center;
            text-align: center;
        }

        .footer-bottom-links {
            display: flex;
            flex-wrap: wrap;
            gap: 4px 20px;
            justify-content: center;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }

        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding-top: 64px;
                padding-bottom: 64px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline {
                grid-template-columns: repeat(3, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }
            :root {
                --header-height: 60px;
            }
            .desktop-nav {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .bottom-tab-nav {
                display: block;
            }
            .hero-section {
                min-height: auto;
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-comparison {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .section {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .metric-value {
                font-size: 30px;
            }
            .service-matrix {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .timeline {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .timeline-dot {
                display: none;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .quick-answers-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .cta-form-row {
                flex-direction: column;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .trust-bar {
                gap: 16px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-cta-row {
                width: 100%;
            }
            .hero-cta-row .btn-primary,
            .hero-cta-row .btn-secondary {
                flex: 1;
                min-width: 140px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 14px;
                line-height: 1.7;
            }
            .section-title {
                font-size: 22px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .metric-value {
                font-size: 26px;
            }
            .glass-card {
                padding: 18px;
            }
            .service-card {
                padding: 18px;
            }
            .comparison-col {
                padding: 18px;
            }
            .news-card {
                padding: 16px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px 16px;
            }
            .cta-form-wrap {
                padding: 20px;
            }
            .scene-card {
                padding: 20px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .trust-bar {
                padding: 16px;
            }
            .trust-item {
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 68px;
            --bottom-tab-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }
        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        a:hover {
            color: var(--neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: 1px;
            flex-shrink: 0;
            transition: color 0.25s ease, text-shadow 0.25s ease;
        }
        .logo-link:hover {
            color: var(--neon);
            text-shadow: 0 0 14px rgba(0, 240, 160, 0.35);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #00F0A0 0%, #1A8BFF 100%);
            color: #0A0E1A;
            font-weight: 900;
            font-size: 18px;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .desktop-nav a {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 40px;
            padding: 0 14px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .desktop-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .desktop-nav a.active {
            color: var(--neon);
        }
        .desktop-nav a.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            background: var(--neon);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.6);
        }
        .hamburger-btn {
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            border: 1px solid var(--border-glass);
            background: var(--glass-bg);
            transition: border-color 0.25s ease;
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .hamburger-btn:hover {
            border-color: var(--neon);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(10, 14, 26, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            padding: 16px 20px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            min-height: 44px;
            padding: 0 12px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 16px;
            transition: background 0.25s ease, color 0.25s ease;
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
        }
        .mobile-menu a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }
        .mobile-tab-bar {
            display: none;
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 98;
            height: var(--bottom-tab-height);
            background: rgba(10, 14, 26, 0.96);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glass);
            padding-bottom: env(safe-area-inset-bottom, 0);
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4);
        }
        .mobile-tab-bar-inner {
            display: flex;
            align-items: stretch;
            height: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 8px;
        }
        .mobile-tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            min-width: 0;
            color: var(--text-muted);
            font-size: 11px;
            font-weight: 500;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
            padding: 4px 2px;
        }
        .mobile-tab-item:hover {
            color: var(--text-secondary);
        }
        .mobile-tab-item.active {
            color: var(--neon);
        }
        .mobile-tab-item svg {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }
        .page-banner {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 14, 26, 0.9) 50%, rgba(15, 23, 42, 0.6) 100%);
            border-bottom: 1px solid var(--border-glass);
            padding-top: 56px;
            padding-bottom: 56px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(26, 139, 255, 0.18) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -5%;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(0, 240, 160, 0.12) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .breadcrumb a:hover {
            color: var(--neon);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--neon);
            font-weight: 600;
        }
        .page-banner h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 14px 0;
            color: var(--text-primary);
            letter-spacing: 0;
        }
        .page-banner .banner-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.75;
            margin: 0;
        }
        .section-title {
            font-size: clamp(22px, 2.6vw, 30px);
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 12px 0;
            color: var(--text-primary);
            letter-spacing: 0;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0 0 32px 0;
            line-height: 1.7;
            max-width: 640px;
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            display: flex;
            flex-direction: column;
            overflow: hidden;
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(0, 240, 160, 0.35);
        }
        .guide-card .guide-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: var(--card-radius) var(--card-radius) 0 0;
            background: var(--bg-secondary);
        }
        .guide-card .guide-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .guide-cover img {
            transform: scale(1.05);
        }
        .guide-card .guide-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: rgba(10, 14, 26, 0.82);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--neon);
            letter-spacing: 0;
        }
        .guide-card .guide-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .guide-card .guide-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 8px 0;
            color: var(--text-primary);
        }
        .guide-card .guide-excerpt {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 14px 0;
            flex: 1;
        }
        .guide-card .guide-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        .guide-card .guide-link {
            font-weight: 600;
            font-size: 14px;
            color: var(--electric);
            transition: color 0.25s ease;
        }
        .guide-card .guide-link:hover {
            color: var(--neon);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-chip {
            display: inline-flex;
            align-items: center;
            min-height: 38px;
            padding: 6px 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-glass);
            border-radius: 999px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: border-color 0.25s ease, color 0.25s ease, background 0.25s ease;
        }
        .tag-chip:hover {
            border-color: var(--neon);
            color: var(--neon);
            background: rgba(0, 240, 160, 0.06);
        }
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 18px;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            box-shadow: var(--shadow-card);
            transition: border-color 0.25s ease, box-shadow 0.3s ease;
        }
        .rank-item:hover {
            border-color: rgba(0, 240, 160, 0.3);
            box-shadow: var(--shadow-card-hover);
        }
        .rank-num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-numeric);
            font-weight: 800;
            font-size: 18px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
        }
        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, rgba(255, 180, 84, 0.25) 0%, rgba(255, 180, 84, 0.08) 100%);
            color: var(--gold);
            border: 1px solid rgba(255, 180, 84, 0.35);
        }
        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, rgba(220, 220, 220, 0.18) 0%, rgba(220, 220, 220, 0.06) 100%);
            color: #D5D8DD;
            border: 1px solid rgba(220, 220, 220, 0.3);
        }
        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, rgba(205, 140, 80, 0.2) 0%, rgba(205, 140, 80, 0.06) 100%);
            color: #C8925E;
            border: 1px solid rgba(205, 140, 80, 0.3);
        }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 2px 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-meta {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }
        .rank-heat {
            flex-shrink: 0;
            font-family: var(--font-numeric);
            font-weight: 700;
            font-size: 15px;
            color: var(--neon);
        }
        .video-guide-card {
            position: relative;
            border-radius: var(--card-radius);
            overflow: hidden;
            min-height: 320px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .video-guide-card .video-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
            transition: opacity 0.5s ease, transform 0.6s ease;
        }
        .video-guide-card:hover .video-bg {
            opacity: 0.7;
            transform: scale(1.03);
        }
        .video-guide-card .video-overlay {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
            padding: 32px;
            text-align: center;
        }
        .video-guide-card .video-play-btn {
            width: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(10, 14, 26, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid var(--neon);
            border-radius: 50%;
            color: var(--neon);
            transition: box-shadow 0.3s ease, transform 0.25s ease;
            cursor: pointer;
        }
        .video-guide-card .video-play-btn:hover {
            box-shadow: 0 0 24px rgba(0, 240, 160, 0.5);
            transform: scale(1.06);
        }
        .video-guide-card .video-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        .video-guide-card .video-sub {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 420px;
            line-height: 1.6;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .guarantee-item {
            padding: 20px;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            box-shadow: var(--shadow-card);
            transition: border-color 0.3s ease;
        }
        .guarantee-item:hover {
            border-color: rgba(0, 240, 160, 0.25);
        }
        .guarantee-item .g-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 160, 0.1);
            border-radius: 10px;
            margin-bottom: 12px;
            color: var(--neon);
        }
        .guarantee-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 6px 0;
            color: var(--text-primary);
        }
        .guarantee-item p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .subscribe-cta {
            background: linear-gradient(135deg, rgba(0, 240, 160, 0.08) 0%, rgba(26, 139, 255, 0.06) 100%);
            border: 1px solid rgba(0, 240, 160, 0.2);
            border-radius: var(--card-radius);
            padding: 36px 32px;
            text-align: center;
        }
        .subscribe-cta h2 {
            font-size: clamp(20px, 2.2vw, 26px);
            font-weight: 800;
            margin: 0 0 10px 0;
            color: var(--text-primary);
        }
        .subscribe-cta p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0 0 24px 0;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 220px;
            min-height: 48px;
            padding: 10px 18px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item.active {
            border-color: rgba(0, 240, 160, 0.35);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 18px;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            cursor: pointer;
            transition: color 0.25s ease;
            text-align: left;
            width: 100%;
            background: none;
            border: none;
        }
        .faq-question:hover {
            color: var(--neon);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: transform 0.3s ease, color 0.3s ease;
            font-size: 18px;
            font-weight: 300;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--neon);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 18px;
        }
        .faq-item.active .faq-answer {
            max-height: 220px;
            padding: 0 18px 16px;
        }
        .faq-answer p {
            font-size: 14.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .site-footer {
            background-color: #0A0E1A;
            border-top: 1px solid var(--border-glass);
            padding: 48px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 16px 0 0 0;
            max-width: 360px;
        }
        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }
        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-col-links a:hover {
            color: var(--neon);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            align-items: center;
            text-align: center;
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-bottom-links a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }
        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }
            .desktop-nav {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .mobile-tab-bar {
                display: block;
            }
            body {
                padding-bottom: calc(var(--bottom-tab-height) + env(safe-area-inset-bottom, 0));
            }
            .section {
                padding-top: 52px;
                padding-bottom: 52px;
            }
            .page-banner {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .subscribe-cta {
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                align-items: flex-start;
                text-align: left;
            }
            .footer-bottom-links {
                flex-wrap: wrap;
            }
            .rank-item {
                padding: 12px 14px;
                gap: 10px;
            }
            .video-guide-card {
                min-height: 240px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner .banner-desc {
                font-size: 15px;
            }
            .section-title {
                font-size: 20px;
            }
            .guide-card .guide-body {
                padding: 16px;
            }
            .subscribe-form {
                flex-direction: column;
                gap: 10px;
            }
            .subscribe-form input {
                min-width: 100%;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 18px;
                font-size: 14px;
                min-height: 42px;
            }
            .logo-link {
                font-size: 17px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 68px;
            --bottom-tab-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        a:hover {
            color: var(--neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible, a:focus-visible, input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding-top: 72px;
            padding-bottom: 72px;
        }
        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        .logo-link:hover {
            color: var(--neon);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 800;
            font-size: 18px;
            border-radius: 8px;
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.45);
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .desktop-nav a {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
            white-space: nowrap;
            text-decoration: none;
        }
        .desktop-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .desktop-nav a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }
        .desktop-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--neon);
            border-radius: 1px;
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.5);
        }
        .hamburger-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
            transition: background 0.3s ease, border-color 0.3s ease;
        }
        .hamburger-btn:hover {
            background: rgba(0, 240, 160, 0.10);
            border-color: rgba(0, 240, 160, 0.3);
        }
        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* Mobile drawer nav */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            z-index: 49;
            background: rgba(10, 14, 26, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            padding: 16px 20px 24px;
        }
        .mobile-drawer.open {
            display: block;
        }
        .mobile-drawer a {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            text-decoration: none;
            transition: background 0.25s ease, color 0.25s ease;
        }
        .mobile-drawer a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }
        /* Bottom tab nav */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--bottom-tab-height);
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-bottom: env(safe-area-inset-bottom, 0);
        }
        .bottom-tab-nav .tab-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 100%;
            max-width: 600px;
            margin: 0 auto;
            padding: 0 8px;
        }
        .bottom-tab-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            flex: 1;
            min-width: 0;
            height: 100%;
            padding: 6px 4px;
            color: var(--text-muted);
            text-decoration: none;
            font-size: 11px;
            font-weight: 500;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .bottom-tab-nav a:hover {
            color: var(--text-secondary);
        }
        .bottom-tab-nav a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.06);
        }
        .bottom-tab-nav a svg {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }
        /* Category H1 banner */
        .category-banner {
            padding-top: 56px;
            padding-bottom: 48px;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.8) 0%, rgba(10, 14, 26, 0.6) 100%);
            border-bottom: 1px solid var(--border-glass);
        }
        .category-banner h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .category-banner .banner-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
        }
        /* Section title */
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        /* Tag chips */
        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            cursor: pointer;
            transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
            white-space: nowrap;
        }
        .tag-chip:hover {
            color: var(--neon);
            border-color: rgba(0, 240, 160, 0.4);
            background: rgba(0, 240, 160, 0.06);
        }
        .tag-chip.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.10);
            border-color: rgba(0, 240, 160, 0.5);
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.2);
        }
        /* Ranking list */
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: 12px;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        .ranking-item:hover {
            background: rgba(255, 255, 255, 0.04);
            transform: translateX(2px);
        }
        .ranking-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 14px;
            font-family: var(--font-numeric);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
        }
        .ranking-badge.top1 {
            background: rgba(255, 180, 84, 0.15);
            color: var(--gold);
            box-shadow: 0 0 10px rgba(255, 180, 84, 0.3);
        }
        .ranking-badge.top2 {
            background: rgba(26, 139, 255, 0.15);
            color: var(--electric);
        }
        .ranking-badge.top3 {
            background: rgba(0, 240, 160, 0.12);
            color: var(--neon);
        }
        .ranking-info {
            flex: 1;
            min-width: 0;
        }
        .ranking-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .ranking-meta {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .ranking-heat {
            font-size: 14px;
            font-weight: 700;
            font-family: var(--font-numeric);
            color: var(--text-secondary);
            white-space: nowrap;
        }
        /* Video placeholder */
        .video-placeholder {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 240px;
            border-radius: var(--card-radius);
            background-size: cover;
            background-position: center;
            border: 1px solid var(--border-glass);
            overflow: hidden;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .video-placeholder:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-card-hover);
        }
        .video-placeholder .video-overlay {
            position: absolute;
            inset: 0;
            background: rgba(10, 14, 26, 0.55);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .video-placeholder .play-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 240, 160, 0.2);
            border: 2px solid var(--neon);
            color: var(--neon);
            box-shadow: 0 0 20px rgba(0, 240, 160, 0.4);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .video-placeholder:hover .play-btn {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 160, 0.6);
        }
        /* Form */
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }
        .subscribe-form input {
            flex: 1;
            min-height: 44px;
            padding: 10px 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: rgba(0, 240, 160, 0.5);
            box-shadow: 0 0 0 3px rgba(0, 240, 160, 0.1);
        }
        /* FAQ accordion */
        .faq-accordion-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: 12px;
            transition: border-color 0.3s ease;
        }
        .faq-accordion-item.active {
            border-color: rgba(0, 240, 160, 0.45);
        }
        .faq-accordion-btn {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 16px 18px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
            transition: background 0.3s ease, color 0.3s ease;
        }
        .faq-accordion-btn:hover {
            background: rgba(255, 255, 255, 0.04);
            color: var(--neon);
        }
        .faq-accordion-btn .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform 0.3s ease;
            color: var(--text-muted);
        }
        .faq-accordion-item.active .faq-accordion-btn .faq-icon {
            transform: rotate(180deg);
            color: var(--neon);
        }
        .faq-accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-accordion-item.active .faq-accordion-content {
            max-height: 400px;
        }
        .faq-accordion-content p {
            padding: 0 18px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* Footer */
        .site-footer {
            background: #0A0E1A;
            border-top: 1px solid var(--border-glass);
            padding-top: 56px;
            padding-bottom: 32px;
            margin-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
            margin-top: 8px;
        }
        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-col-links a:hover {
            color: var(--neon);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }
        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }
            body {
                padding-bottom: var(--bottom-tab-height);
            }
            .desktop-nav {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .bottom-tab-nav {
                display: block;
            }
            .section {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .category-banner {
                padding-top: 40px;
                padding-bottom: 36px;
            }
            .category-banner h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form {
                flex-direction: column;
            }
        }
        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 20px;
            }
            .glass-card {
                padding: 18px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 64px;
            --bottom-tab-height: 62px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        a:hover {
            color: var(--neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding-top: 72px;
            padding-bottom: 72px;
        }
        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 19px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--text-primary);
            text-shadow: 0 0 16px rgba(0, 240, 160, 0.4);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, #00F0A0, #1A8BFF);
            color: #0A0E1A;
            font-weight: 900;
            font-size: 17px;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .desktop-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            position: relative;
            white-space: nowrap;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .desktop-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .desktop-nav a.active {
            color: var(--neon);
            font-weight: 600;
        }
        .desktop-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--neon);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 160, 0.6);
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 8px;
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.25s ease, border-color 0.25s ease;
        }
        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .hamburger-btn span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 26, 0.97);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            padding: 24px 20px;
            z-index: 49;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            padding: 14px 16px;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid transparent;
            transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
            border-color: rgba(0, 240, 160, 0.2);
        }

        /* Bottom tab nav mobile */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 48;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glass);
            height: var(--bottom-tab-height);
            padding-bottom: env(safe-area-inset-bottom, 0);
        }
        .bottom-tab-nav .tab-inner {
            display: flex;
            align-items: stretch;
            justify-content: space-around;
            height: 100%;
            max-width: 600px;
            margin: 0 auto;
        }
        .bottom-tab-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            flex: 1;
            min-height: 48px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-muted);
            transition: color 0.25s ease;
            position: relative;
        }
        .bottom-tab-nav a svg {
            width: 22px;
            height: 22px;
            stroke: currentColor;
            fill: none;
            stroke-width: 1.8;
            transition: stroke 0.25s ease, fill 0.25s ease;
        }
        .bottom-tab-nav a.active {
            color: var(--neon);
        }
        .bottom-tab-nav a.active svg {
            stroke: var(--neon);
            fill: rgba(0, 240, 160, 0.12);
        }

        /* Footer */
        .site-footer {
            background: #080C16;
            border-top: 1px solid var(--border-glass);
            padding-top: 48px;
            padding-bottom: 28px;
            margin-bottom: 0;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-glass);
            margin-bottom: 20px;
        }
        .footer-brand-text {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-top: 12px;
            max-width: 420px;
        }
        .footer-col-title {
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color 0.25s ease;
        }
        .footer-col-links a:hover {
            color: var(--neon);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
        }
        .footer-bottom-links a {
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }
        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Page-specific styles */
        /* H1 banner */
        .page-banner {
            padding: 48px 0 32px;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92), rgba(15, 23, 42, 0.85));
            border-bottom: 1px solid var(--border-glass);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 160, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -15%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 139, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 8px;
        }
        .page-banner h1 .highlight {
            color: var(--neon);
        }
        .page-banner .banner-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        /* Timeline */
        .timeline-list {
            position: relative;
            padding-left: 28px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .timeline-list::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: linear-gradient(180deg, var(--neon), rgba(0, 240, 160, 0.2), var(--electric));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            padding-left: 16px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 3px solid var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.5);
            z-index: 1;
        }
        .timeline-item .timeline-date {
            font-size: 13px;
            font-weight: 600;
            color: var(--neon);
            font-family: var(--font-numeric);
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .timeline-item .timeline-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .timeline-item .timeline-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .timeline-item .timeline-img {
            border-radius: 10px;
            overflow: hidden;
            margin-top: 10px;
            max-width: 280px;
            border: 1px solid var(--border-glass);
        }

        /* Milestone mini timeline */
        .milestone-mini {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .milestone-mini .milestone-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease;
            position: relative;
        }
        .milestone-mini .milestone-card:hover {
            transform: translateY(-2px);
            border-color: rgba(0, 240, 160, 0.35);
        }
        .milestone-mini .ms-year {
            font-size: 15px;
            font-weight: 800;
            color: var(--neon);
            font-family: var(--font-numeric);
            margin-bottom: 6px;
        }
        .milestone-mini .ms-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
        }
        .milestone-mini .ms-text {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
            margin-top: 4px;
        }

        /* Partner list */
        .partner-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .partner-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 18px 20px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease;
        }
        .partner-card:hover {
            transform: translateY(-2px);
            border-color: rgba(0, 240, 160, 0.35);
        }
        .partner-card .partner-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .partner-card .partner-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Subscribe CTA */
        .subscribe-cta {
            background: linear-gradient(135deg, rgba(0, 240, 160, 0.08), rgba(26, 139, 255, 0.08));
            border: 1px solid rgba(0, 240, 160, 0.25);
            border-radius: var(--card-radius);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        .subscribe-cta .cta-text {
            flex: 1;
            min-width: 260px;
        }
        .subscribe-cta .cta-text h2 {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .subscribe-cta .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            flex: 1;
            min-width: 300px;
            max-width: 460px;
        }
        .subscribe-form input {
            flex: 1;
            min-height: 44px;
            padding: 10px 16px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }

        /* Platform guarantee */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .guarantee-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease;
        }
        .guarantee-card:hover {
            transform: translateY(-2px);
            border-color: rgba(0, 240, 160, 0.35);
        }
        .guarantee-card .gc-icon {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: rgba(0, 240, 160, 0.1);
            color: var(--neon);
            font-size: 18px;
            font-weight: 700;
        }
        .guarantee-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .guarantee-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ accordion */
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item.active {
            border-color: rgba(0, 240, 160, 0.45);
            box-shadow: 0 0 16px rgba(0, 240, 160, 0.12);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            padding: 16px 18px;
            background: transparent;
            color: var(--text-primary);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            transition: color 0.25s ease;
        }
        .faq-question:hover {
            color: var(--neon);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 18px;
            font-weight: 700;
            transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--neon);
            background: rgba(0, 240, 160, 0.12);
        }
        .faq-answer {
            display: none;
            padding: 0 18px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* Section heading */
        .section-heading {
            margin-bottom: 28px;
        }
        .section-heading h2 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 6px;
        }
        .section-heading h2 .neon-text {
            color: var(--neon);
        }
        .section-heading p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 560px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .milestone-mini {
                grid-template-columns: repeat(2, 1fr);
            }
            .partner-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
                --bottom-tab-height: 58px;
            }
            .desktop-nav {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .bottom-tab-nav {
                display: block;
            }
            body {
                padding-bottom: var(--bottom-tab-height);
            }
            .section {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .page-banner {
                padding: 32px 0 24px;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner .banner-desc {
                font-size: 14px;
            }
            .milestone-mini {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .partner-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .subscribe-cta {
                flex-direction: column;
                align-items: stretch;
                padding: 24px 20px;
            }
            .subscribe-form {
                flex-direction: column;
                max-width: 100%;
                min-width: auto;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section-heading h2 {
                font-size: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .timeline-list {
                padding-left: 22px;
                gap: 18px;
            }
            .timeline-list::before {
                left: 6px;
            }
            .timeline-item::before {
                left: -22px;
                width: 12px;
                height: 12px;
                top: 6px;
                border-width: 2px;
            }
            .timeline-item .timeline-title {
                font-size: 15px;
            }
            .timeline-item .timeline-img {
                max-width: 100%;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 14px;
            }
            .faq-answer {
                padding: 0 14px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 480px) {
            .page-banner h1 {
                font-size: 20px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 8px 16px;
                font-size: 14px;
                min-height: 40px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 60px;
            --bottom-tab-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: var(--bottom-tab-height);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        a:hover {
            color: var(--neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding-top: 48px;
            padding-bottom: 48px;
        }
        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            height: 100%;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
        }
        .logo-link:hover {
            color: var(--neon);
            text-shadow: 0 0 12px rgba(0, 240, 160, 0.4);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--neon) 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 800;
            font-size: 16px;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: nowrap;
        }
        .desktop-nav a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        .desktop-nav a:hover {
            color: var(--text-primary);
            border-bottom-color: rgba(255, 255, 255, 0.3);
        }
        .desktop-nav a.active {
            color: var(--neon);
            border-bottom-color: var(--neon);
            text-shadow: 0 0 10px rgba(0, 240, 160, 0.35);
        }
        .hamburger-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            border: 1px solid var(--border-glass);
            background: var(--glass-bg);
            transition: border-color 0.3s ease, background 0.3s ease;
        }
        .hamburger-btn:hover {
            border-color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(10, 14, 26, 0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            padding: 16px 20px;
            flex-direction: column;
            gap: 4px;
            z-index: 45;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 12px;
            border-radius: 8px;
            transition: background 0.25s ease, color 0.25s ease;
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
        }
        .mobile-menu a.active {
            background: rgba(0, 240, 160, 0.1);
            color: var(--neon);
        }
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 55;
            height: var(--bottom-tab-height);
            background: rgba(10, 14, 26, 0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-glass);
            padding-bottom: env(safe-area-inset-bottom);
        }
        .bottom-tab-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 100%;
            gap: 4px;
        }
        .bottom-tab-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--text-muted);
            font-size: 11px;
            font-weight: 500;
            min-width: 56px;
            padding: 4px 8px;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
            text-decoration: none;
        }
        .bottom-tab-nav a:hover {
            color: var(--text-primary);
        }
        .bottom-tab-nav a.active {
            color: var(--neon);
            background: rgba(0, 240, 160, 0.08);
        }
        .bottom-tab-nav svg {
            width: 20px;
            height: 20px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }
        .bottom-tab-nav a.active svg {
            fill: rgba(0, 240, 160, 0.15);
            stroke: var(--neon);
        }
        .page-title-banner {
            background: linear-gradient(135deg, rgba(26, 139, 255, 0.12) 0%, rgba(0, 240, 160, 0.06) 100%);
            border-bottom: 1px solid var(--border-glass);
            padding-top: 40px;
            padding-bottom: 32px;
            position: relative;
            overflow: hidden;
        }
        .page-title-banner::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 240, 160, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-title-banner h1 {
            font-size: clamp(24px, 4vw, 36px);
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0;
            line-height: 1.3;
        }
        .page-title-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }
        .chart-bar {
            display: flex;
            align-items: flex-end;
            gap: 8px;
            height: 120px;
            padding-top: 10px;
        }
        .chart-bar .bar {
            flex: 1;
            background: linear-gradient(180deg, var(--neon) 0%, rgba(0, 240, 160, 0.3) 100%);
            border-radius: 4px 4px 0 0;
            min-height: 12px;
            transition: height 0.6s ease;
            position: relative;
        }
        .chart-bar .bar:hover {
            background: linear-gradient(180deg, #5fffcd 0%, rgba(0, 240, 160, 0.6) 100%);
        }
        .chart-bar .bar-label {
            position: absolute;
            bottom: -22px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 11px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .chart-bar .bar-value {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 11px;
            color: var(--neon);
            font-weight: 700;
            font-family: var(--font-numeric);
        }
        .rank-bar-row {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .rank-bar-row:last-child {
            border-bottom: none;
        }
        .rank-bar-name {
            width: 100px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            flex-shrink: 0;
        }
        .rank-bar-track {
            flex: 1;
            height: 8px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 4px;
            overflow: hidden;
        }
        .rank-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--electric) 0%, var(--neon) 100%);
            border-radius: 4px;
            transition: width 0.6s ease;
        }
        .rank-bar-value {
            width: 52px;
            font-size: 14px;
            font-weight: 700;
            color: var(--neon);
            font-family: var(--font-numeric);
            text-align: right;
            flex-shrink: 0;
        }
        .data-stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 14px;
        }
        .data-stat-card {
            text-align: center;
            padding: 16px 12px;
        }
        .data-stat-card .num {
            font-family: var(--font-numeric);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .data-stat-card .label {
            font-size: 13px;
            color: var(--text-muted);
        }
        .faq-accordion-item {
            border-bottom: 1px solid var(--border-glass);
            padding: 12px 0;
            transition: border-color 0.3s ease;
        }
        .faq-accordion-item.active {
            border-bottom-color: var(--border-hover);
        }
        .faq-accordion-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            padding: 8px 0;
            text-align: left;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            transition: color 0.25s ease;
        }
        .faq-accordion-question:hover {
            color: var(--neon);
        }
        .faq-accordion-question .icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: transform 0.3s ease, color 0.3s ease;
        }
        .faq-accordion-item.active .faq-accordion-question .icon {
            transform: rotate(45deg);
            color: var(--neon);
        }
        .faq-accordion-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-accordion-item.active .faq-accordion-answer {
            max-height: 300px;
            padding-bottom: 12px;
            padding-top: 4px;
        }
        .site-footer {
            background: #0A0E1A;
            border-top: 1px solid var(--border-glass);
            padding-top: 40px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 360px;
        }
        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-col-links a:hover {
            color: var(--neon);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border-glass);
            padding-top: 16px;
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links a {
            color: var(--text-secondary);
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }
        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
        }
        @media (max-width: 1024px) {
            .desktop-nav {
                gap: 14px;
            }
            .desktop-nav a {
                font-size: 13px;
            }
        }
        @media (max-width: 767px) {
            .desktop-nav {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .bottom-tab-nav {
                display: block;
            }
            body {
                padding-bottom: var(--bottom-tab-height);
            }
            .section {
                padding-top: 32px;
                padding-bottom: 32px;
            }
            .page-title-banner {
                padding-top: 32px;
                padding-bottom: 24px;
            }
            .page-title-banner h1 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .chart-bar {
                height: 90px;
                gap: 5px;
            }
            .data-stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rank-bar-name {
                width: 72px;
                font-size: 12px;
            }
        }
        @media (max-width: 520px) {
            .data-stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .glass-card {
                padding: 16px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F172A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(255, 255, 255, 0.10);
            --text-primary: #F5F7FA;
            --text-secondary: #B0B8C5;
            --text-muted: #7C8595;
            --neon: #00F0A0;
            --electric: #1A8BFF;
            --gold: #FFB454;
            --danger: #FF4D6A;
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(0, 240, 160, 0.45);
            --card-radius: 16px;
            --small-radius: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 16px rgba(0, 240, 160, 0.45), 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-glow-hover: 0 0 24px rgba(0, 240, 160, 0.65), 0 4px 12px rgba(0, 0, 0, 0.5);
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Rajdhani", "DIN Alternate", sans-serif;
            --header-height: 68px;
            --bottom-tab-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: var(--bottom-tab-height);
        }
        @media (min-width: 768px) {
            body {
                padding-bottom: 0;
            }
        }
        a {
            color: var(--electric);
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, text-shadow 0.25s ease;
        }
        a:hover {
            color: var(--neon);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible, a:focus-visible, input:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section {
            padding-top: 72px;
            padding-bottom: 72px;
        }
        @media (max-width: 768px) {
            .section {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }
        .section-alt {
            background-color: rgba(15, 23, 42, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .glass-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--small-radius);
            padding: 16px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card-sm:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-card-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: linear-gradient(135deg, #00F0A0 0%, #00C88A 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: box-shadow 0.3s ease, transform 0.2s ease, filter 0.2s ease;
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px) scale(1.02);
            filter: brightness(1.1);
            color: #0A0E1A;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #F5F7FA;
            font-weight: 600;
            font-size: 15px;
            border-radius: 8px;
            transition: border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 240, 160, 0.2);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-weight: 800;
            font-size: 18px;
            letter-spacing: 0.5px;
            transition: color 0.25s ease;
        }
        .logo-link:hover {
            color: var(--neon);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #00F0A0 0%, #1A8BFF 100%);
            color: #0A0E1A;
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
        }
        .desktop-nav {
            display: none;
            align-items: center;
            gap: 28px;
        }
        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
        }
        .desktop-nav a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            transition: color 0.25s ease;
            white-space: nowrap;
        }
        .desktop-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--neon);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        .desktop-nav a:hover {
            color: var(--text-primary);
        }
        .desktop-nav a:hover::after {
            transform: scaleX(1);
        }
        .desktop-nav a.active {
            color: var(--neon);
            font-weight: 600;
        }
        .desktop-nav a.active::after {
            transform: scaleX(1);
        }
        .hamburger-btn {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            border: 1px solid var(--border-glass);
            background: transparent;
            min-height: 44px;
            min-width: 44px;
            align-items: center;
            justify-content: center;
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn:hover span {
            background: var(--neon);
        }
        @media (min-width: 768px) {
            .hamburger-btn {
                display: none;
            }
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(10, 14, 26, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            z-index: 40;
            padding: 16px 20px;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-drawer.open {
            display: flex;
        }
        .mobile-drawer a {
            color: var(--text-secondary);
            font-size: 16px;
            font-weight: 500;
            padding: 12px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.25s ease;
        }
        .mobile-drawer a:hover {
            color: var(--neon);
        }
        .mobile-drawer a.active {
            color: var(--neon);
            font-weight: 600;
        }
        .bottom-tab-nav {
            display: flex;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: var(--bottom-tab-height);
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-glass);
            z-index: 45;
            padding-bottom: env(safe-area-inset-bottom);
        }
        @media (min-width: 768px) {
            .bottom-tab-nav {
                display: none;
            }
        }
        .bottom-tab-nav a {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: var(--text-muted);
            font-size: 11px;
            font-weight: 500;
            transition: color 0.25s ease;
            min-height: 44px;
        }
        .bottom-tab-nav a svg {
            width: 20px;
            height: 20px;
            stroke: currentColor;
            fill: none;
            stroke-width: 2;
            transition: fill 0.25s ease, stroke 0.25s ease;
        }
        .bottom-tab-nav a.active {
            color: var(--neon);
        }
        .bottom-tab-nav a.active svg {
            fill: rgba(0, 240, 160, 0.2);
            stroke: var(--neon);
        }
        .bottom-tab-nav a:hover {
            color: var(--neon);
        }
        .faq-accordion {
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-accordion:hover {
            border-color: rgba(255, 255, 255, 0.18);
        }
        .faq-accordion.open {
            border-color: var(--border-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            text-align: left;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: color 0.25s ease;
            min-height: 44px;
        }
        .faq-question:hover {
            color: var(--neon);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: transform 0.3s ease, color 0.3s ease;
            font-size: 18px;
            font-weight: 700;
        }
        .faq-accordion.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--neon);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-accordion.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .form-input {
            width: 100%;
            min-height: 48px;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 15px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        .form-input:focus {
            border-color: var(--neon);
            box-shadow: 0 0 0 3px rgba(0, 240, 160, 0.15);
        }
        .site-footer {
            background: #0A0E1A;
            border-top: 1px solid var(--border-glass);
            padding-top: 48px;
            padding-bottom: 32px;
        }
        @media (max-width: 768px) {
            .site-footer {
                padding-bottom: 80px;
            }
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 40px;
            }
        }
        .footer-brand-text {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-top: 14px;
            max-width: 460px;
        }
        .footer-col-title {
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.25s ease;
        }
        .footer-col-links a:hover {
            color: var(--neon);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: flex-start;
        }
        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
                gap: 16px;
            }
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 14px;
        }
        .footer-bottom-links a {
            color: var(--text-secondary);
            font-size: 14px;
        }
        .footer-bottom-links a:hover {
            color: var(--neon);
        }
        .footer-copyright {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.6;
        }