/* roulang page: index */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* Mobile menu button */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 82vh;
            display: flex;
            align-items: center;
            padding: 80px 0 60px;
            background: var(--bg-dark);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 1;
        }

        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 15, 20, 0.88) 0%, rgba(13, 15, 20, 0.72) 50%, rgba(13, 15, 20, 0.9) 100%);
        }

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

        .hero-left {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(183, 255, 0, 0.12);
            border: 1px solid rgba(183, 255, 0, 0.4);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
            100% { opacity: 1; transform: scale(1); }
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.5px;
            margin: 0 0 20px;
            color: #FFFFFF;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-sub {
            font-size: 16.5px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin: 0 0 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 15px;
            padding: 14px 26px;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.25s ease;
            box-shadow: none;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 24px rgba(183, 255, 0, 0.4);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 15px;
            padding: 14px 26px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: all 0.25s ease;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 16px rgba(183, 255, 0, 0.2);
        }

        .hero-group-progress {
            background: rgba(22, 25, 32, 0.85);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            width: 100%;
            max-width: 480px;
        }

        .hero-group-progress .group-stats {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .hero-group-progress .group-stats strong {
            color: var(--primary);
            font-size: 18px;
            font-weight: 800;
        }

        .progress-bar {
            height: 6px;
            background: var(--border-color);
            border-radius: 3px;
            overflow: hidden;
        }

        .progress-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            transition: width 1s ease;
        }

        .hero-right {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-panel {
            background: rgba(22, 25, 32, 0.9);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            width: 100%;
            max-width: 420px;
            box-shadow: var(--shadow-card);
        }

        .hero-panel .panel-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-panel .match-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
        }

        .hero-panel .match-item:last-child {
            border-bottom: none;
        }

        .hero-panel .match-teams {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .hero-panel .match-time {
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-panel .match-score {
            font-size: 15px;
            font-weight: 800;
            color: var(--primary);
        }

        /* Section shared */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: var(--bg-card);
        }

        .section-dark {
            background: var(--bg-dark);
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 12px;
            color: #FFFFFF;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin: 0 0 40px;
            max-width: 700px;
        }

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

        .section-header.center {
            text-align: center;
        }

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

        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            background: rgba(183, 255, 0, 0.1);
            color: var(--primary);
            border: 1px solid rgba(183, 255, 0, 0.3);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

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

        .kpi-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: all 0.25s ease;
        }

        .kpi-card:hover {
            border-color: var(--primary);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.12);
            transform: translateY(-3px);
        }

        .kpi-number {
            font-size: 42px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: -1px;
        }

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

        .kpi-icon {
            width: 36px;
            height: 36px;
            margin: 0 auto 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(183, 255, 0, 0.08);
            border-radius: 50%;
            color: var(--primary);
            font-weight: 800;
            font-size: 16px;
        }

        /* Service matrix */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .service-card:hover {
            border-color: rgba(183, 255, 0, 0.5);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-card .service-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(183, 255, 0, 0.1);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            color: var(--primary);
            font-weight: 900;
            font-size: 18px;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
            color: #FFFFFF;
        }

        .service-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Compare section */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }

        .compare-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.3s ease;
        }

        .compare-card.before {
            border-left: 4px solid var(--accent-pink);
        }

        .compare-card.after {
            border-left: 4px solid var(--primary);
            border-color: rgba(183, 255, 0, 0.3);
        }

        .compare-card .compare-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .compare-card .compare-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .compare-card .compare-list li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-card .compare-list li:last-child {
            border-bottom: none;
        }

        .compare-card .compare-list .mark {
            color: var(--accent-pink);
            font-weight: 700;
            font-size: 16px;
        }

        .compare-card.after .compare-list .mark {
            color: var(--primary);
        }

        /* Milestones */
        .milestone-track {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .milestone-track::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }

        .milestone-item {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .milestone-dot {
            width: 56px;
            height: 56px;
            background: var(--bg-card);
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 18px;
            color: var(--primary);
            margin: 0 auto 14px;
            box-shadow: 0 0 16px rgba(183, 255, 0, 0.15);
        }

        .milestone-item h4 {
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 6px;
            color: #FFFFFF;
        }

        .milestone-item p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        /* Brand intro */
        .brand-intro {
            display: grid;
            grid-template-columns: 1.3fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .brand-intro .brand-text h3 {
            font-size: 28px;
            font-weight: 800;
            margin: 0 0 16px;
            color: #FFFFFF;
        }

        .brand-intro .brand-text p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin: 0 0 14px;
        }

        .brand-intro .brand-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .brand-intro .brand-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

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

        .testimonial-card {
            background: var(--bg-card-alt);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
        }

        .testimonial-card:hover {
            border-color: rgba(183, 255, 0, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .testimonial-card .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .testimonial-card .testimonial-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            overflow: hidden;
            flex-shrink: 0;
        }

        .testimonial-card .testimonial-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .testimonial-card .testimonial-name {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
        }

        .testimonial-card .testimonial-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        .testimonial-card .testimonial-quote {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0;
        }

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

        .audience-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .audience-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .audience-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .audience-card .audience-body {
            padding: 18px;
        }

        .audience-card .audience-body h4 {
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 6px;
            color: #FFFFFF;
        }

        .audience-card .audience-body p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* News */
        .news-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 24px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            border-color: rgba(183, 255, 0, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .news-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .news-card .news-body {
            padding: 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-card .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card .news-title {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .news-card .news-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .news-card.featured {
            grid-row: span 1;
        }

        .news-card.featured img {
            height: 240px;
        }

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

        .assurance-card {
            background: var(--bg-card-alt);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .assurance-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .assurance-card .assurance-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(183, 255, 0, 0.1);
            border-radius: 50%;
            color: var(--primary);
            font-weight: 900;
            font-size: 20px;
        }

        .assurance-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 8px;
            color: #FFFFFF;
        }

        .assurance-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

        .faq-item:hover {
            border-color: rgba(183, 255, 0, 0.4);
        }

        .faq-item .faq-question {
            padding: 18px 22px;
            font-size: 17px;
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }

        .faq-item .faq-question .faq-indicator {
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            transition: transform 0.25s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .faq-item.open .faq-question .faq-indicator {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open {
            border-left: 3px solid var(--primary);
        }

        /* CTA */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, rgba(183, 255, 0, 0.08) 0%, rgba(0, 229, 160, 0.04) 50%, rgba(139, 92, 246, 0.06) 100%);
            border-top: 1px solid rgba(183, 255, 0, 0.15);
            border-bottom: 1px solid rgba(183, 255, 0, 0.15);
        }

        .cta-box {
            background: var(--bg-card);
            border: 1px solid rgba(183, 255, 0, 0.3);
            border-radius: var(--radius-md);
            padding: 48px 40px;
            text-align: center;
            box-shadow: 0 0 40px rgba(183, 255, 0, 0.06);
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0 0 10px;
            color: #FFFFFF;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-box .btn-primary {
            font-size: 16px;
            padding: 16px 36px;
        }

        /* Footer */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero {
                min-height: auto;
                padding: 60px 0 40px;
            }

            .hero h1 {
                font-size: 38px;
            }

            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .audience-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .news-grid {
                grid-template-columns: 1fr 1fr;
            }

            .news-card.featured {
                grid-column: span 2;
            }

            .brand-intro {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .milestone-track {
                grid-template-columns: repeat(2, 1fr);
            }

            .milestone-track::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta.desktop-only {
                display: none;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .hero h1 {
                font-size: 30px;
            }

            .hero-sub {
                font-size: 14.5px;
            }

            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .kpi-number {
                font-size: 32px;
            }

            .service-grid {
                grid-template-columns: 1fr;
            }

            .compare-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .audience-grid {
                grid-template-columns: 1fr;
            }

            .news-grid {
                grid-template-columns: 1fr;
            }

            .news-card.featured {
                grid-column: span 1;
            }

            .assurance-grid {
                grid-template-columns: 1fr;
            }

            .milestone-track {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-box {
                padding: 32px 20px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
                width: 100%;
            }

            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
                line-height: 1.2;
            }

            .kpi-grid {
                grid-template-columns: 1fr;
            }

            .hero-panel {
                padding: 18px;
            }

            .section-title {
                font-size: 22px;
            }

            .nav-logo {
                font-size: 18px;
            }

            .nav-logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        /* Category page header */
        .cat-hero {
            padding: 72px 0 48px;
            background: radial-gradient(ellipse at 20% 0%, rgba(183, 255, 0, 0.08), transparent 55%),
                radial-gradient(ellipse at 85% 30%, rgba(139, 92, 246, 0.06), transparent 50%),
                var(--bg-dark);
            border-bottom: 1px solid rgba(42, 47, 58, 0.4);
        }

        .cat-hero h1 {
            font-size: 42px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        .cat-hero h1 .highlight {
            color: var(--primary);
        }

        .cat-hero .cat-desc {
            max-width: 780px;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin: 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: var(--text-weak);
        }

        .breadcrumb .current {
            color: var(--primary);
        }

        /* Guide list cards - left image right text */
        .guide-list-item {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }

        .guide-list-item:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 0 30px rgba(183, 255, 0, 0.15), var(--shadow-card);
        }

        .guide-list-item .guide-img {
            position: relative;
            overflow: hidden;
            min-height: 200px;
        }

        .guide-list-item .guide-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .guide-list-item:hover .guide-img img {
            transform: scale(1.03);
        }

        .guide-list-item .guide-body {
            padding: 24px 28px 24px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .guide-list-item .guide-tag-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .guide-list-item .guide-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
            line-height: 1.5;
            transition: color 0.2s ease;
        }

        .guide-list-item:hover .guide-title {
            color: var(--primary);
        }

        .guide-list-item .guide-excerpt {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0 0 14px;
        }

        .guide-list-item .guide-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12.5px;
            color: var(--text-weak);
        }

        .guide-list-item .guide-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .difficulty-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .difficulty-easy {
            background: rgba(183, 255, 0, 0.12);
            color: var(--primary);
            border: 1px solid rgba(183, 255, 0, 0.3);
        }

        .difficulty-medium {
            background: rgba(0, 229, 160, 0.12);
            color: var(--secondary);
            border: 1px solid rgba(0, 229, 160, 0.3);
        }

        .difficulty-hard {
            background: rgba(230, 0, 122, 0.12);
            color: var(--accent-pink);
            border: 1px solid rgba(230, 0, 122, 0.3);
        }

        .difficulty-expert {
            background: rgba(139, 92, 246, 0.12);
            color: var(--accent-purple);
            border: 1px solid rgba(139, 92, 246, 0.3);
        }

        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud .tag {
            display: inline-block;
            padding: 7px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            cursor: default;
        }

        .tag-cloud .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
            box-shadow: 0 0 12px rgba(183, 255, 0, 0.12);
        }

        .tag-cloud .tag.hot {
            border-color: var(--accent-pink);
            color: var(--accent-pink);
            background: rgba(230, 0, 122, 0.06);
        }

        /* Difficulty filter */
        .difficulty-filter {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .difficulty-filter .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            cursor: default;
        }

        .difficulty-filter .filter-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .difficulty-filter .filter-chip.active {
            border-color: var(--primary);
            background: rgba(183, 255, 0, 0.1);
            color: var(--primary);
        }

        /* Section shared */
        .section {
            padding: 64px 0;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 8px;
            letter-spacing: 0.3px;
        }

        .section-header h2 .accent {
            color: var(--primary);
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        .section-alt {
            background: var(--bg-card-alt);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        /* Related cards */
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 0 24px rgba(183, 255, 0, 0.12), var(--shadow-card);
        }

        .related-card .related-img {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .related-card .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .related-card:hover .related-img img {
            transform: scale(1.03);
        }

        .related-card .related-body {
            padding: 20px 22px;
        }

        .related-card .related-tag {
            font-size: 11.5px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            display: block;
            margin-bottom: 8px;
        }

        .related-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .related-card p {
            font-size: 13.5px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.65;
        }

        .related-card .related-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
            color: var(--text-weak);
        }

        /* View more */
        .view-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            padding: 8px 0;
            border-bottom: 1px solid transparent;
            transition: all 0.25s ease;
        }

        .view-more:hover {
            border-bottom-color: var(--primary);
            color: var(--primary-dark);
        }

        /* CTA */
        .cta-band {
            padding: 72px 0;
            background: linear-gradient(135deg, rgba(183, 255, 0, 0.12) 0%, rgba(139, 92, 246, 0.08) 50%, rgba(0, 229, 160, 0.06) 100%);
            border-top: 1px solid rgba(183, 255, 0, 0.15);
            border-bottom: 1px solid rgba(183, 255, 0, 0.15);
            text-align: center;
        }

        .cta-band h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 12px;
            letter-spacing: 0.3px;
        }

        .cta-band h2 .highlight {
            color: var(--primary);
        }

        .cta-band p {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0 0 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .cta-band .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            border: none;
        }

        .cta-band .btn-primary {
            background: var(--primary);
            color: #0D0F14;
        }

        .cta-band .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 28px rgba(183, 255, 0, 0.35);
            transform: translateY(-2px);
        }

        .cta-band .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* Footer */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 9px;
        }

        .footer-col ul a {
            font-size: 13.5px;
            color: var(--text-muted);
            transition: color 0.2s ease;
            display: inline-block;
        }

        .footer-col ul a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 22px;
            border-top: 1px solid var(--border-color);
            font-size: 12.5px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cat-hero h1 {
                font-size: 36px;
            }

            .guide-list-item {
                grid-template-columns: 240px 1fr;
                gap: 18px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .desktop-only {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .cat-hero {
                padding: 48px 0 36px;
            }

            .cat-hero h1 {
                font-size: 30px;
            }

            .guide-list-item {
                grid-template-columns: 1fr;
                gap: 0;
            }

            .guide-list-item .guide-body {
                padding: 18px 22px 22px;
            }

            .guide-list-item .guide-img {
                min-height: 180px;
                aspect-ratio: 16/9;
            }

            .section {
                padding: 40px 0;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .cta-band h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .cat-hero h1 {
                font-size: 26px;
            }

            .cat-hero .cat-desc {
                font-size: 14.5px;
            }

            .section {
                padding: 36px 0;
            }

            .section-header h2 {
                font-size: 21px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .cta-band {
                padding: 48px 0;
            }

            .cta-band h2 {
                font-size: 23px;
            }

            .guide-list-item .guide-title {
                font-size: 17px;
            }

            .guide-list-item .guide-excerpt {
                font-size: 13.5px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.78);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.55);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }
        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* Mobile menu button */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }
        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        /* Section base */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-card);
        }
        .section-title {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 12px 0;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .section-title .accent {
            color: var(--primary);
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 16px;
            margin: 0 0 48px 0;
            max-width: 640px;
            line-height: 1.75;
        }
        .text-accent-primary {
            color: var(--primary);
        }
        .text-accent-purple {
            color: var(--accent-purple);
        }
        .text-accent-pink {
            color: var(--accent-pink);
        }

        /* Badge / Tag */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(183, 255, 0, 0.08);
            color: var(--primary);
            border: 1px solid rgba(183, 255, 0, 0.25);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
            transition: all 0.2s ease;
        }
        .tag:hover {
            background: rgba(183, 255, 0, 0.15);
            border-color: var(--primary);
        }
        .tag-purple {
            background: rgba(139, 92, 246, 0.1);
            color: var(--accent-purple);
            border-color: rgba(139, 92, 246, 0.3);
        }
        .tag-pink {
            background: rgba(230, 0, 122, 0.08);
            color: var(--accent-pink);
            border-color: rgba(230, 0, 122, 0.28);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 24px rgba(183, 255, 0, 0.4);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: all 0.25s ease;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(183, 255, 0, 0.04);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        /* Category hero (H1 block) */
        .category-hero {
            padding: 72px 0 56px 0;
            background-color: var(--bg-dark);
            background-image: radial-gradient(ellipse at 20% 30%, rgba(183, 255, 0, 0.04) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 60%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
                linear-gradient(135deg, rgba(13, 15, 20, 0.95) 0%, rgba(22, 25, 32, 0.85) 100%);
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent-purple), var(--accent-pink));
            opacity: 0.7;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(183, 255, 0, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            border: 1px solid rgba(183, 255, 0, 0.25);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .category-hero h1 {
            font-size: 42px;
            font-weight: 900;
            color: var(--text-main);
            margin: 0 0 18px 0;
            letter-spacing: 0.8px;
            line-height: 1.25;
        }
        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero .category-desc {
            font-size: 16.5px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.85;
            margin: 0;
        }
        .category-hero .category-desc strong {
            color: var(--primary);
            font-weight: 600;
        }

        /* Card grid - tri-column */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .gear-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .gear-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(183, 255, 0, 0.08);
        }
        .gear-card .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background-color: var(--bg-card-alt);
        }
        .gear-card .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .gear-card:hover .card-image-wrap img {
            transform: scale(1.03);
        }
        .gear-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 3;
            background: rgba(13, 15, 20, 0.85);
            backdrop-filter: blur(6px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 4px;
            border: 1px solid rgba(183, 255, 0, 0.3);
            letter-spacing: 0.3px;
        }
        .gear-card .card-body {
            padding: 20px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .gear-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px 0;
            line-height: 1.4;
            transition: color 0.2s ease;
        }
        .gear-card:hover .card-title {
            color: var(--primary);
        }
        .gear-card .card-summary {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0 0 16px 0;
            flex: 1;
        }
        .gear-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid rgba(42, 47, 58, 0.5);
            font-size: 12.5px;
            color: var(--text-weak);
        }
        .gear-card .card-meta .score {
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .gear-card .card-meta .score .score-bar {
            display: inline-block;
            width: 52px;
            height: 4px;
            background: rgba(183, 255, 0, 0.18);
            border-radius: 2px;
            overflow: hidden;
            margin-left: 4px;
        }
        .gear-card .card-meta .score .score-bar .fill {
            display: block;
            height: 100%;
            background: var(--primary);
            border-radius: 2px;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: flex-start;
        }
        .tag-cloud .tag {
            font-size: 13px;
            padding: 8px 18px;
            border-radius: 20px;
            cursor: default;
        }
        .tag-cloud .tag:hover {
            transform: translateY(-2px);
            border-color: var(--primary);
        }

        /* Score summary */
        .score-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .score-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .score-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            opacity: 0.6;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .score-item:hover {
            border-color: rgba(183, 255, 0, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
        }
        .score-item .score-number {
            font-size: 44px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }
        .score-item .score-number .unit {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-muted);
            margin-top: 8px;
        }
        .score-item .score-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            letter-spacing: 0.5px;
        }

        /* Info split */
        .info-split {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: center;
        }
        .info-split .info-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            aspect-ratio: 16 / 10;
            background-color: var(--bg-card-alt);
        }
        .info-split .info-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .info-split .info-image:hover img {
            transform: scale(1.02);
        }
        .info-split .info-content h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px 0;
            line-height: 1.4;
        }
        .info-split .info-content p {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 16px 0;
        }
        .info-split .info-content ul {
            list-style: none;
            padding: 0;
            margin: 20px 0 0 0;
        }
        .info-split .info-content ul li {
            padding-left: 24px;
            position: relative;
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .info-split .info-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(183, 255, 0, 0.5);
        }

        /* Related articles */
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(183, 255, 0, 0.08);
        }
        .related-card .related-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-card-alt);
        }
        .related-card .related-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .related-image img {
            transform: scale(1.03);
        }
        .related-card .related-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .related-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px 0;
            line-height: 1.5;
            transition: color 0.2s ease;
        }
        .related-card:hover .related-title {
            color: var(--primary);
        }
        .related-card .related-meta {
            font-size: 12.5px;
            color: var(--text-weak);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid rgba(42, 47, 58, 0.4);
        }

        /* CTA banner */
        .cta-banner {
            background: linear-gradient(135deg, #0D0F14 0%, #1B1F27 45%, #161920 100%);
            border: 1px solid rgba(183, 255, 0, 0.2);
            border-radius: var(--radius-md);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -30%;
            width: 80%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(183, 255, 0, 0.07) 0%, transparent 65%);
            pointer-events: none;
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -20%;
            width: 60%;
            height: 180%;
            background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-banner .cta-inner {
            position: relative;
            z-index: 2;
        }
        .cta-banner h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 12px 0;
            letter-spacing: 0.5px;
        }
        .cta-banner h2 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-banner p {
            color: var(--text-muted);
            font-size: 16px;
            margin: 0 0 28px 0;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: #090B0F;
            border-top: 1px solid rgba(42, 47, 58, 0.6);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px 0;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(42, 47, 58, 0.4);
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .score-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .info-split {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 34px;
            }
            .section {
                padding: 60px 0;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .category-desc {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .score-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .score-item .score-number {
                font-size: 30px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .cta-banner {
                padding: 36px 20px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .container {
                padding: 0 16px;
            }
            .info-split .info-content h3 {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .score-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section-title {
                font-size: 21px;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 20px;
                font-size: 14px;
            }
            .category-badge {
                font-size: 12px;
                padding: 4px 12px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .desktop-only {
            display: inline-flex;
        }

        /* Mobile menu button */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        /* Page header / category H1 */
        .page-header {
            padding: 72px 0 48px;
            background: var(--bg-dark);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(183, 255, 0, 0.08), transparent 70%);
            pointer-events: none;
        }
        .page-header::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.06), transparent 70%);
            pointer-events: none;
        }
        .page-header .container {
            position: relative;
            z-index: 1;
        }
        .page-header .page-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(183, 255, 0, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(183, 255, 0, 0.25);
            margin-bottom: 18px;
            letter-spacing: 1px;
        }
        .page-header h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.25;
            color: var(--text-main);
            margin: 0 0 16px 0;
            letter-spacing: 0.5px;
        }
        .page-header .page-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.85;
            margin: 0;
        }

        /* Section general */
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 8px 0;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0 0 32px 0;
            line-height: 1.7;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }
        .section-header-left {
            flex: 1;
            min-width: 260px;
        }

        /* News timeline */
        .news-timeline {
            position: relative;
            padding-left: 32px;
        }
        .news-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: linear-gradient(to bottom, var(--border-color), var(--accent-purple), var(--border-color));
            border-radius: 2px;
        }
        .news-item {
            position: relative;
            margin-bottom: 36px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            box-shadow: var(--shadow-card);
        }
        .news-item:hover {
            border-color: var(--primary);
            box-shadow: 0 12px 34px rgba(0, 0, 0, 0.45), var(--glow-primary);
            transform: translateY(-2px);
        }
        .news-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 28px;
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            border: 2px solid var(--bg-dark);
            box-shadow: 0 0 0 3px rgba(183, 255, 0, 0.25);
            z-index: 2;
        }
        .news-item .news-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
        }
        .news-item .news-image {
            flex: 0 0 280px;
            max-width: 280px;
            position: relative;
            min-height: 200px;
            overflow: hidden;
        }
        .news-item .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .news-item:hover .news-image img {
            transform: scale(1.03);
        }
        .news-item .news-body {
            flex: 1;
            padding: 24px 28px;
            min-width: 260px;
        }
        .news-item .news-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(183, 255, 0, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .news-item .news-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 10px 0;
            line-height: 1.5;
            transition: color 0.2s ease;
        }
        .news-item:hover .news-title {
            color: var(--primary);
        }
        .news-item .news-summary {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0 0 14px 0;
        }
        .news-item .news-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .news-item .news-tag {
            font-size: 12px;
            color: var(--text-muted);
            background: var(--bg-card-alt);
            border: 1px solid var(--border-color);
            padding: 3px 10px;
            border-radius: 999px;
            transition: all 0.2s ease;
        }
        .news-item .news-tag:hover {
            color: var(--primary);
            border-color: rgba(183, 255, 0, 0.4);
        }
        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            border-bottom: 2px solid transparent;
            padding-bottom: 4px;
            transition: all 0.2s ease;
        }
        .view-more-link:hover {
            border-bottom-color: var(--primary);
            color: var(--primary-dark);
        }
        .view-more-link .arrow-icon {
            font-size: 18px;
            line-height: 1;
        }

        /* Calendar summary */
        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .calendar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all 0.25s ease;
        }
        .calendar-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }
        .calendar-card .calendar-date {
            font-size: 28px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .calendar-card .calendar-month {
            font-size: 13px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .calendar-card .calendar-event {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .calendar-card .calendar-detail {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .tag-cloud .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 999px;
            transition: all 0.25s ease;
            cursor: default;
        }
        .tag-cloud .tag-item:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
            box-shadow: 0 0 14px rgba(183, 255, 0, 0.15);
        }
        .tag-cloud .tag-item .tag-count {
            font-size: 12px;
            color: var(--text-weak);
            background: var(--bg-card-alt);
            padding: 1px 8px;
            border-radius: 999px;
        }

        /* Stats bar */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stats-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all 0.25s ease;
        }
        .stats-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .stats-item .stats-number {
            font-size: 42px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stats-item .stats-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
        }
        .stats-item .stats-extra {
            font-size: 12px;
            color: var(--text-weak);
            margin-top: 4px;
        }

        /* Related news */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .related-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .related-card .related-image {
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .related-card .related-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .related-card:hover .related-image img {
            transform: scale(1.03);
        }
        .related-card .related-body {
            padding: 18px 20px;
        }
        .related-card .related-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .related-card .related-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.55;
            margin: 0 0 8px 0;
            transition: color 0.2s ease;
        }
        .related-card:hover .related-title {
            color: var(--primary);
        }
        .related-card .related-meta {
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Footer */
        .site-footer {
            background: #0A0C0F;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
            margin-top: 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(42, 47, 58, 0.6);
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .news-item .news-image {
                flex: 0 0 220px;
                max-width: 220px;
            }
            .calendar-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .desktop-only {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .page-header {
                padding: 48px 0 32px;
            }
            .page-header h1 {
                font-size: 32px;
            }
            .section {
                padding: 44px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .news-timeline {
                padding-left: 24px;
            }
            .news-item .news-image {
                flex: 0 0 100%;
                max-width: 100%;
                min-height: 180px;
            }
            .news-item .news-body {
                padding: 18px 20px;
            }
            .news-item .news-title {
                font-size: 18px;
            }
            .calendar-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-item .stats-number {
                font-size: 32px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-header h1 {
                font-size: 26px;
            }
            .page-header .page-desc {
                font-size: 15px;
            }
            .section-title {
                font-size: 22px;
            }
            .news-timeline {
                padding-left: 18px;
            }
            .news-timeline::before {
                left: 4px;
            }
            .news-item::before {
                left: -20px;
                width: 8px;
                height: 8px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .tag-cloud .tag-item {
                font-size: 13px;
                padding: 6px 14px;
            }
            .calendar-card {
                padding: 16px;
            }
            .calendar-card .calendar-date {
                font-size: 24px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        .section {
            padding: 72px 0;
        }

        .section-alt {
            background-color: var(--bg-card);
        }

        .section-dark {
            background-color: var(--bg-dark);
        }

        .section-gradient {
            background: linear-gradient(135deg, #1B1F27 0%, #0D0F14 50%, #1B1F27 100%);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            color: var(--text-weak);
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        .category-heading {
            padding: 48px 0 32px;
            border-bottom: 1px solid var(--border-color);
        }

        .category-heading h1 {
            font-size: 42px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        .category-heading h1 .highlight {
            color: var(--primary);
            text-shadow: 0 0 30px rgba(183, 255, 0, 0.3);
        }

        .category-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin: 0;
        }

        .team-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .team-card {
            display: flex;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
            box-shadow: var(--shadow-card);
        }

        .team-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.45), var(--glow-primary);
        }

        .team-card-img {
            flex: 0 0 160px;
            position: relative;
            overflow: hidden;
        }

        .team-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .team-card:hover .team-card-img img {
            transform: scale(1.05);
        }

        .team-card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(13, 15, 20, 0.7), transparent);
            pointer-events: none;
        }

        .team-card-body {
            flex: 1;
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .team-card-title-row {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 8px;
        }

        .team-card-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0;
            line-height: 1.3;
        }

        .team-card-badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            background: rgba(183, 255, 0, 0.12);
            color: var(--primary);
            border: 1px solid rgba(183, 255, 0, 0.25);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .team-card-subtitle {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0 0 12px;
        }

        .team-card-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .team-stat-pill {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            color: var(--text-secondary);
            background: var(--bg-card-alt);
            border: 1px solid var(--border-color);
        }

        .team-stat-pill strong {
            color: var(--primary);
            font-weight: 700;
        }

        .team-card-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0 0 14px;
            line-height: 1.65;
        }

        .team-card-link {
            align-self: flex-start;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            transition: color 0.2s ease;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .team-card-link:hover {
            color: var(--secondary);
        }

        .rank-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .rank-stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all 0.25s ease;
        }

        .rank-stat-item:hover {
            border-color: var(--accent-purple);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        }

        .rank-stat-value {
            font-size: 44px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
            letter-spacing: -1px;
            text-shadow: 0 0 30px rgba(183, 255, 0, 0.25);
        }

        .rank-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .tag-cloud-item {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all 0.2s ease;
            cursor: pointer;
            text-decoration: none;
        }

        .tag-cloud-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
            box-shadow: 0 0 16px rgba(183, 255, 0, 0.2);
        }

        .tag-cloud-item.active-tag {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(183, 255, 0, 0.08);
        }

        .related-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
            box-shadow: var(--shadow-card);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.45);
        }

        .related-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.05);
        }

        .related-card-body {
            padding: 20px;
        }

        .related-card-date {
            font-size: 12px;
            color: var(--text-weak);
            margin-bottom: 8px;
        }

        .related-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
            line-height: 1.4;
            transition: color 0.2s ease;
        }

        .related-card:hover .related-card-title {
            color: var(--primary);
        }

        .related-card-summary {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .cta-section {
            background: linear-gradient(135deg, #1B1F27 0%, #0D0F14 40%, #1B1F27 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 320px;
            height: 160px;
            background: radial-gradient(ellipse, rgba(183, 255, 0, 0.15), transparent);
            pointer-events: none;
        }

        .cta-title {
            font-size: 36px;
            font-weight: 900;
            color: var(--text-main);
            margin: 0 0 16px;
            position: relative;
            z-index: 1;
        }

        .cta-title .highlight-cta {
            color: var(--primary);
            text-shadow: 0 0 30px rgba(183, 255, 0, 0.4);
        }

        .cta-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 480px;
            margin: 0 auto 32px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 800;
            font-size: 16px;
            padding: 16px 36px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            border: none;
            text-decoration: none;
            position: relative;
            z-index: 1;
        }

        .cta-btn:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 30px rgba(183, 255, 0, 0.45);
            transform: translateY(-2px);
        }

        .cta-btn:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .site-footer {
            background: #0D0F14;
            border-top: 1px solid var(--border-color);
            padding: 64px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid var(--border-color);
        }

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li:last-child {
            margin-bottom: 0;
        }

        .footer-col ul li a {
            font-size: 13.5px;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            padding: 20px 0 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12.5px;
            color: var(--text-weak);
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        @media (max-width: 1024px) {
            .team-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .rank-stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .related-card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .desktop-only {
                display: none;
            }

            .section {
                padding: 48px 0;
            }

            .category-heading {
                padding: 32px 0 24px;
            }

            .category-heading h1 {
                font-size: 30px;
            }

            .team-card {
                flex-direction: column;
            }

            .team-card-img {
                flex: none;
                aspect-ratio: 16/9;
                width: 100%;
            }

            .rank-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .rank-stat-value {
                font-size: 32px;
            }

            .related-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .cta-section {
                padding: 40px 24px;
            }

            .cta-title {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .category-heading h1 {
                font-size: 25px;
            }

            .rank-stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .tag-cloud {
                gap: 8px;
            }

            .tag-cloud-item {
                padding: 8px 14px;
                font-size: 12.5px;
            }

            .team-card-title {
                font-size: 17px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #B7FF00;
            --primary-dark: #9EDF00;
            --secondary: #00E5A0;
            --bg-dark: #0D0F14;
            --bg-card: #161920;
            --bg-card-alt: #1B1F27;
            --border-color: #2A2F3A;
            --accent-purple: #8B5CF6;
            --accent-pink: #E6007A;
            --text-main: #E5E7EB;
            --text-secondary: #D1D5DB;
            --text-muted: #9CA3AF;
            --text-weak: #6B7280;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --glow-primary: 0 0 20px rgba(183, 255, 0, 0.3);
            --glow-pink: 0 0 18px rgba(230, 0, 122, 0.28);
            --glow-purple: 0 0 16px rgba(139, 92, 246, 0.25);
            --font-sans: 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            margin: 0;
            padding: 0;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 15, 20, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(42, 47, 58, 0.6);
            padding: 16px 0;
            transition: background 0.3s ease;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #0D0F14;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 18px;
            line-height: 1;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(183, 255, 0, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            box-shadow: none;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 20px rgba(183, 255, 0, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* Mobile menu button */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 15, 20, 0.98);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            gap: 4px;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(42, 47, 58, 0.5);
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            justify-content: center;
            display: flex;
        }

        /* Page Hero / Category Header */
        .page-hero {
            position: relative;
            padding: 72px 0 56px;
            background: radial-gradient(ellipse at 30% 20%, rgba(183, 255, 0, 0.06), transparent 55%),
                radial-gradient(ellipse at 75% 65%, rgba(139, 92, 246, 0.08), transparent 50%),
                var(--bg-dark);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image:
                linear-gradient(rgba(42, 47, 58, 0.28) 1px, transparent 1px),
                linear-gradient(90deg, rgba(42, 47, 58, 0.28) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(183, 255, 0, 0.1);
            border: 1px solid rgba(183, 255, 0, 0.3);
            border-radius: var(--radius-sm);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: 40px;
            font-weight: 900;
            line-height: 1.2;
            margin: 0 0 16px;
            color: var(--text-main);
            letter-spacing: 0.5px;
            max-width: 750px;
        }

        .page-hero h1 .highlight {
            color: var(--primary);
            text-shadow: var(--glow-primary);
        }

        .page-hero-desc {
            font-size: 16.5px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
            margin: 0;
        }

        /* Generic Section */
        .section {
            padding: 72px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--primary);
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 14px;
            color: var(--text-main);
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0 0 36px;
            max-width: 560px;
            line-height: 1.75;
        }

        /* Optimization List (left text, right image) */
        .opt-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .opt-item {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 32px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            position: relative;
            overflow: hidden;
        }

        .opt-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .opt-item:hover {
            border-color: rgba(183, 255, 0, 0.45);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }

        .opt-item:hover::before {
            opacity: 1;
        }

        .opt-item:hover .opt-title {
            color: var(--primary);
        }

        .opt-item:hover .opt-img img {
            transform: scale(1.03);
        }

        .opt-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .opt-index {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .opt-title {
            font-size: 22px;
            font-weight: 750;
            line-height: 1.35;
            margin: 0 0 12px;
            color: var(--text-main);
            transition: color 0.25s ease;
        }

        .opt-desc {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0 0 16px;
        }

        .opt-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12.5px;
            font-weight: 500;
            border-radius: 20px;
            background: rgba(183, 255, 0, 0.08);
            border: 1px solid rgba(183, 255, 0, 0.22);
            color: var(--primary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .tag:hover {
            background: rgba(183, 255, 0, 0.16);
            border-color: var(--primary);
        }

        .tag.pink {
            background: rgba(230, 0, 122, 0.08);
            border-color: rgba(230, 0, 122, 0.25);
            color: var(--accent-pink);
        }

        .tag.pink:hover {
            background: rgba(230, 0, 122, 0.16);
            border-color: var(--accent-pink);
        }

        .tag.purple {
            background: rgba(139, 92, 246, 0.08);
            border-color: rgba(139, 92, 246, 0.25);
            color: var(--accent-purple);
        }

        .tag.purple:hover {
            background: rgba(139, 92, 246, 0.16);
            border-color: var(--accent-purple);
        }

        .opt-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--bg-card-alt);
            border: 1px solid var(--border-color);
            position: relative;
        }

        .opt-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 32px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14.5px;
            transition: color 0.2s ease, gap 0.2s ease;
        }

        .view-more-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            position: relative;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

        .step-card:hover {
            border-color: rgba(183, 255, 0, 0.4);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }

        .step-num {
            font-size: 48px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 14px;
            letter-spacing: -1px;
            text-shadow: var(--glow-primary);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text-main);
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.65;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -14px;
            transform: translateY(-50%);
            color: var(--text-weak);
            font-size: 20px;
            font-weight: 300;
            z-index: 1;
            pointer-events: none;
        }

        .step-card:last-child .step-arrow {
            display: none;
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .tag-cloud .tag {
            font-size: 14px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
        }

        .tag-cloud .tag.large {
            font-size: 15px;
            padding: 10px 22px;
            font-weight: 600;
        }

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

        .data-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            position: relative;
            overflow: hidden;
        }

        .data-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .data-card:hover {
            border-color: rgba(183, 255, 0, 0.35);
            box-shadow: var(--shadow-card);
        }

        .data-card:hover::after {
            opacity: 1;
        }

        .data-num {
            font-size: 44px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

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

        /* Related Articles */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            border-color: rgba(183, 255, 0, 0.4);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .article-card:hover .article-img img {
            transform: scale(1.03);
        }

        .article-card:hover .article-title-text {
            color: var(--primary);
        }

        .article-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-card-alt);
            border-bottom: 1px solid var(--border-color);
        }

        .article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .article-body {
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-date {
            font-size: 12.5px;
            color: var(--text-weak);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .article-title-text {
            font-size: 16.5px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 8px;
            color: var(--text-main);
            transition: color 0.25s ease;
        }

        .article-excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(183, 255, 0, 0.12) 0%, rgba(0, 229, 160, 0.08) 50%, rgba(139, 92, 246, 0.1) 100%);
            background-color: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(183, 255, 0, 0.08), transparent 65%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 900;
            line-height: 1.25;
            margin: 0 0 12px;
            color: var(--text-main);
            letter-spacing: 0.5px;
        }

        .cta-section h2 .highlight {
            color: var(--primary);
            text-shadow: var(--glow-primary);
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #0D0F14;
            font-weight: 800;
            font-size: 15.5px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
            box-shadow: none;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 28px rgba(183, 255, 0, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(183, 255, 0, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text-main);
            font-weight: 600;
            font-size: 15px;
            padding: 13px 30px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: all 0.25s ease;
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 16px rgba(183, 255, 0, 0.18);
        }

        /* Footer */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.2s ease;
            display: inline-block;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(42, 47, 58, 0.6);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .opt-item {
                grid-template-columns: 1fr 300px;
                gap: 22px;
                padding: 22px;
            }

            .step-arrow {
                display: none;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .desktop-only {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .page-hero-desc {
                font-size: 15px;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .opt-item {
                grid-template-columns: 1fr;
                gap: 18px;
                padding: 20px;
            }

            .opt-img {
                order: -1;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .cta-section {
                padding: 60px 0;
            }

            .cta-section h2 {
                font-size: 26px;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .data-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .data-num {
                font-size: 36px;
            }

            .page-hero h1 {
                font-size: 25px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 21px;
            }
        }