/* roulang page: index */
:root {
            --primary: #0b1a30;
            --secondary: #7b2ff7;
            --accent: #00d4ff;
            --bg-dark: #0a1929;
            --bg-card: #112240;
            --text-main: #e6f1ff;
            --text-weak: #8892b0;
            --text-muted: #5a6a8a;
            --border-light: rgba(255,255,255,0.1);
            --glass-bg: rgba(255,255,255,0.05);
            --radius-card: 16px;
            --radius-btn: 30px;
            --radius-input: 8px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
            --max-width: 1200px;
            --nav-width: 260px;
            --spacing-section: 80px;
            --font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        *,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 18px;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a { color: var(--secondary); text-decoration: none; transition: color 0.3s; }
        a:hover { color: var(--accent); }
        a:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: var(--font-family); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--text-main); }
        h1 { font-size: 48px; }
        h2 { font-size: 36px; }
        h3 { font-size: 24px; }
        .text-weak { color: var(--text-weak); }
        .text-muted { color: var(--text-muted); }
        .text-accent { color: var(--accent); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: var(--spacing-section) 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { color: var(--text-weak); font-size: 18px; max-width: 640px; margin: 0 auto; }

        /* Layout */
        .app-shell { display: flex; min-height: 100vh; }
        .nav-sidebar {
            width: var(--nav-width);
            background: var(--primary);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            border-right: 1px solid var(--border-light);
            overflow-y: auto;
        }
        .nav-sidebar .logo-area {
            padding: 32px 24px 24px;
            border-bottom: 1px solid var(--border-light);
        }
        .nav-sidebar .logo-area a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--accent);
            font-size: 22px;
            font-weight: 700;
        }
        .nav-sidebar .logo-area a i { font-size: 28px; }
        .nav-sidebar .logo-area a:hover { color: var(--accent); }
        .nav-sidebar .nav-menu { padding: 16px 0; flex: 1; }
        .nav-sidebar .nav-menu li { margin: 0; }
        .nav-sidebar .nav-menu a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 24px;
            color: var(--text-weak);
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            border-left: 3px solid transparent;
        }
        .nav-sidebar .nav-menu a i { width: 20px; text-align: center; font-size: 18px; }
        .nav-sidebar .nav-menu a:hover, .nav-sidebar .nav-menu a.active {
            color: var(--text-main);
            background: rgba(123,47,247,0.12);
            border-left-color: var(--secondary);
        }
        .nav-sidebar .nav-menu a.active { color: var(--accent); }
        .nav-sidebar .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-muted);
        }
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
        }

        /* Mobile Nav */
        .mobile-nav-toggle { display: none; }
        .mobile-nav-overlay { display: none; }

        /* Hero */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 50%, var(--bg-dark) 100%);
            overflow: hidden;
            padding: 40px 24px;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(123,47,247,0.25) 0%, transparent 60%);
            z-index: 1;
        }
        .hero-content { position: relative; z-index: 2; max-width: 800px; }
        .hero-content h1 {
            font-size: 56px;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--text-main) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content .subtitle {
            font-size: 20px;
            color: var(--text-weak);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-content .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero-content .hero-stats .stat-item { text-align: center; }
        .hero-content .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
        }
        .hero-content .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 4px;
        }
        .btn {
            display: inline-block;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-size: 18px;
            font-weight: 600;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
            border: none;
            line-height: 1.4;
            min-height: 54px;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(123,47,247,0.35);
        }
        .btn-primary:hover {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 0 30px rgba(0,212,255,0.5);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: transparent;
            color: var(--secondary);
            border: 2px solid var(--secondary);
        }
        .btn-secondary:hover {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 0 20px rgba(123,47,247,0.3);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
        }
        .btn-accent:hover {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 0 30px rgba(0,212,255,0.4);
            transform: translateY(-2px);
        }
        .btn-glow {
            animation: glow-pulse 2s ease-in-out infinite;
        }
        @keyframes glow-pulse {
            0%,100% { box-shadow: 0 0 20px rgba(0,212,255,0.4); }
            50% { box-shadow: 0 0 40px rgba(0,212,255,0.7); }
        }

        /* Glass Card */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            transition: all 0.4s;
            box-shadow: var(--shadow-card);
        }
        .glass-card:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .glass-card .card-icon { font-size: 40px; color: var(--accent); margin-bottom: 16px; }
        .glass-card h3 { font-size: 22px; margin-bottom: 12px; }
        .glass-card p { color: var(--text-weak); font-size: 16px; line-height: 1.6; }

        /* Services - 两列+一列大卡 */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .services-grid .feature-large {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: center;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all 0.4s;
        }
        .services-grid .feature-large:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .services-grid .feature-large .text-side h3 { font-size: 28px; margin-bottom: 16px; }
        .services-grid .feature-large .text-side p { color: var(--text-weak); font-size: 16px; line-height: 1.7; }
        .services-grid .feature-large .img-side img {
            border-radius: 12px;
            width: 100%;
            object-fit: cover;
        }
        .services-grid .glass-card { text-align: center; }

        /* Demo Section */
        .demo-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0d1f3c 100%);
            position: relative;
        }
        .demo-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .demo-content { position: relative; z-index: 1; }
        .demo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .demo-grid .demo-image img { border-radius: var(--radius-card); box-shadow: var(--shadow-card); width: 100%; }
        .demo-grid .demo-text h3 { font-size: 32px; margin-bottom: 20px; }
        .demo-grid .demo-text p { color: var(--text-weak); font-size: 17px; line-height: 1.8; margin-bottom: 16px; }
        .demo-grid .demo-text .demo-features { margin-top: 20px; }
        .demo-grid .demo-text .demo-features li {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            color: var(--text-main);
            font-size: 16px;
        }
        .demo-grid .demo-text .demo-features li i { color: var(--accent); font-size: 18px; }

        /* Evidence */
        .evidence-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .evidence-grid .evidence-item {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 16px;
            transition: all 0.4s;
        }
        .evidence-grid .evidence-item:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .evidence-grid .evidence-item .ev-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .evidence-grid .evidence-item .ev-label { color: var(--text-weak); font-size: 16px; }
        .evidence-grid .evidence-item .ev-icon { font-size: 36px; color: var(--secondary); margin-bottom: 12px; }

        /* News / CMS */
        .news-section { background: var(--bg-dark); }
        .news-scroll {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 20px;
            display: flex;
            gap: 16px;
            transition: all 0.4s;
            box-shadow: var(--shadow-card);
        }
        .news-card:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .news-card .news-img {
            width: 120px;
            min-width: 120px;
            height: 80px;
            border-radius: 8px;
            object-fit: cover;
            background: var(--bg-card);
        }
        .news-card .news-body { flex: 1; min-width: 0; }
        .news-card .news-body .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .news-card .news-body .news-title a { color: inherit; }
        .news-card .news-body .news-title a:hover { color: var(--accent); }
        .news-card .news-body .news-summary {
            font-size: 14px;
            color: var(--text-weak);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .news-card .news-body .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .news-card .news-body .news-meta .tag {
            background: rgba(123,47,247,0.2);
            color: var(--secondary);
            padding: 2px 10px;
            border-radius: 12px;
            font-size: 12px;
        }
        .news-card .news-body .news-meta .news-date { color: var(--accent); font-size: 13px; }
        .news-card .news-body .news-meta .news-arrow { margin-left: auto; color: var(--text-weak); font-size: 14px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-weak);
        }
        .news-empty i { font-size: 48px; margin-bottom: 16px; opacity: 0.4; }
        .news-empty p { font-size: 18px; }

        /* Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .pricing-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            text-align: center;
            transition: all 0.4s;
            position: relative;
            box-shadow: var(--shadow-card);
        }
        .pricing-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
        }
        .pricing-card.featured {
            border-color: var(--secondary);
            background: rgba(123,47,247,0.1);
        }
        .pricing-card.featured .badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--secondary);
            color: #fff;
            padding: 4px 20px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
        }
        .pricing-card .price-name { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
        .pricing-card .price-amount { font-size: 42px; font-weight: 900; color: var(--accent); margin: 16px 0; }
        .pricing-card .price-amount span { font-size: 18px; color: var(--text-weak); }
        .pricing-card .price-desc { color: var(--text-weak); font-size: 15px; margin-bottom: 20px; }
        .pricing-card .price-features { text-align: left; margin: 0 0 24px; }
        .pricing-card .price-features li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-weak);
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .pricing-card .price-features li i { color: var(--accent); font-size: 14px; }
        .pricing-card .btn { width: 100%; }

        /* FAQ */
        .faq-section { background: var(--bg-dark); }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--border-light);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }
        .faq-item:hover { border-color: rgba(123,47,247,0.3); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-family);
            transition: color 0.3s;
        }
        .faq-question:hover { color: var(--accent); }
        .faq-question .faq-icon { font-size: 20px; color: var(--accent); transition: transform 0.3s; }
        .faq-question.open .faq-icon { transform: rotate(45deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 16px;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-content { position: relative; z-index: 1; }
        .cta-content h2 { font-size: 40px; margin-bottom: 16px; }
        .cta-content p { color: var(--text-weak); font-size: 18px; max-width: 600px; margin: 0 auto 32px; }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
        }
        .floating-cta .btn {
            padding: 16px 32px;
            min-height: 56px;
            border-radius: 50px;
            box-shadow: 0 8px 32px rgba(123,47,247,0.4);
            font-size: 17px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .floating-cta .btn:hover {
            box-shadow: 0 0 40px rgba(0,212,255,0.6);
        }

        /* Footer */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-light);
            padding: 40px 0 24px;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-inner .footer-brand { font-size: 16px; font-weight: 600; color: var(--accent); }
        .footer-inner .footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
        .footer-inner .footer-links a { color: var(--text-muted); font-size: 14px; }
        .footer-inner .footer-links a:hover { color: var(--accent); }
        .footer-inner .footer-copy { color: var(--text-muted); font-size: 14px; }
        .footer-inner .footer-socials { display: flex; gap: 16px; }
        .footer-inner .footer-socials a { color: var(--text-muted); font-size: 20px; }
        .footer-inner .footer-socials a:hover { color: var(--accent); }

        /* Badge / Tag */
        .badge-pill {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(123,47,247,0.2);
            color: var(--secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root { --spacing-section: 60px; --nav-width: 0px; }
            .nav-sidebar { display: none; }
            .main-content { margin-left: 0; }
            .mobile-nav-toggle { display: flex; }
            .mobile-nav-toggle {
                position: fixed;
                top: 16px;
                left: 16px;
                z-index: 1100;
                background: var(--primary);
                border: 1px solid var(--border-light);
                color: var(--text-main);
                width: 48px;
                height: 48px;
                border-radius: 12px;
                align-items: center;
                justify-content: center;
                font-size: 22px;
                cursor: pointer;
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                box-shadow: 0 4px 20px rgba(0,0,0,0.5);
            }
            .mobile-nav-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0,0,0,0.7);
                z-index: 1050;
            }
            .mobile-nav-overlay.open { display: block; }
            .mobile-nav-panel {
                position: fixed;
                top: 0;
                left: -280px;
                width: 280px;
                height: 100vh;
                background: var(--primary);
                z-index: 1060;
                transition: left 0.3s;
                padding: 24px 0;
                border-right: 1px solid var(--border-light);
                overflow-y: auto;
            }
            .mobile-nav-panel.open { left: 0; }
            .mobile-nav-panel .logo-area { padding: 16px 24px 20px; border-bottom: 1px solid var(--border-light); margin-bottom: 8px; }
            .mobile-nav-panel .logo-area a { display: flex; align-items: center; gap: 12px; color: var(--accent); font-size: 20px; font-weight: 700; }
            .mobile-nav-panel .nav-menu a { display: flex; align-items: center; gap: 14px; padding: 14px 24px; color: var(--text-weak); font-size: 16px; border-left: 3px solid transparent; }
            .mobile-nav-panel .nav-menu a:hover, .mobile-nav-panel .nav-menu a.active { color: var(--text-main); background: rgba(123,47,247,0.12); border-left-color: var(--secondary); }
            .mobile-nav-panel .nav-menu a.active { color: var(--accent); }
            h1 { font-size: 36px; }
            h2 { font-size: 28px; }
            .hero-content h1 { font-size: 40px; }
            .services-grid { grid-template-columns: 1fr; }
            .services-grid .feature-large { grid-template-columns: 1fr; }
            .demo-grid { grid-template-columns: 1fr; }
            .evidence-grid { grid-template-columns: repeat(2, 1fr); }
            .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
            .hero-content .hero-stats { gap: 24px; }
            .hero-content .hero-stats .stat-number { font-size: 28px; }
            .news-scroll { grid-template-columns: 1fr; }
            .floating-cta { bottom: 20px; right: 20px; }
            .floating-cta .btn { padding: 12px 24px; font-size: 15px; min-height: 48px; }
        }
        @media (max-width: 640px) {
            :root { --spacing-section: 40px; }
            h1 { font-size: 28px; }
            h2 { font-size: 24px; }
            h3 { font-size: 20px; }
            .hero-content h1 { font-size: 32px; }
            .hero-content .subtitle { font-size: 17px; }
            .hero-content .hero-stats { flex-direction: column; gap: 16px; }
            .services-grid .feature-large { padding: 20px; }
            .services-grid .glass-card { padding: 24px 16px; }
            .evidence-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .evidence-grid .evidence-item { padding: 20px 12px; }
            .evidence-grid .evidence-item .ev-number { font-size: 32px; }
            .pricing-card { padding: 28px 20px; }
            .cta-content h2 { font-size: 28px; }
            .news-card { flex-direction: column; }
            .news-card .news-img { width: 100%; min-width: auto; height: 160px; }
            .faq-question { font-size: 15px; padding: 16px 18px; }
            .faq-answer { font-size: 14px; padding: 0 18px 16px; }
            .footer-inner { flex-direction: column; text-align: center; }
            .btn { padding: 12px 28px; font-size: 16px; min-height: 48px; }
            .section-title { margin-bottom: 32px; }
            .floating-cta .btn { padding: 10px 20px; font-size: 14px; min-height: 44px; }
            .container { padding: 0 16px; }
        }
        @media (max-width: 520px) {
            .evidence-grid { grid-template-columns: 1fr 1fr; }
            .hero-content h1 { font-size: 28px; }
            .hero-content .subtitle { font-size: 15px; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a30;
            --primary-light: #112240;
            --accent: #7b2ff7;
            --accent-glow: #00d4ff;
            --bg-body: #0a1929;
            --bg-card: rgba(255, 255, 255, 0.05);
            --border-glass: rgba(255, 255, 255, 0.1);
            --text-primary: #e6f1ff;
            --text-secondary: #8892b0;
            --text-muted: #5a6a8a;
            --radius-card: 16px;
            --radius-btn: 30px;
            --radius-input: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.6);
            --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --sidebar-width: 260px;
            --transition: 0.3s ease;
            --spacing-section: 80px;
            --spacing-section-mobile: 40px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-glow);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-glow);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== 布局容器 ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .content-area {
            flex: 1;
            padding: 40px 30px 60px;
            max-width: 1000px;
            margin: 0 auto;
            width: 100%;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* ===== 左侧导航 (App Shell) ===== */
        .nav-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-glass);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            backdrop-filter: blur(4px);
        }

        .logo-area {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .logo-area a {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-glow);
            display: flex;
            align-items: center;
            gap: 12px;
            letter-spacing: 1px;
        }

        .logo-area a i {
            font-size: 28px;
            color: var(--accent);
        }

        .logo-area a:hover {
            color: var(--accent-glow);
        }

        .nav-menu {
            flex: 1;
            padding: 20px 0;
        }

        .nav-menu li {
            margin: 2px 0;
        }

        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 24px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .nav-menu li a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .nav-menu li a:hover {
            color: var(--text-primary);
            background: rgba(123, 47, 247, 0.08);
            border-left-color: var(--accent);
        }

        .nav-menu li a:hover i {
            color: var(--accent);
        }

        .nav-menu li a.active {
            color: var(--text-primary);
            background: rgba(123, 47, 247, 0.12);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .nav-menu li a.active i {
            color: var(--accent);
        }

        .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-footer i {
            color: var(--accent);
            font-size: 14px;
        }

        /* ===== 移动端导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--primary);
            border-bottom: 1px solid var(--border-glass);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            backdrop-filter: blur(12px);
        }

        .mobile-header .logo-area-mobile {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-header .logo-area-mobile a {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-glow);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .logo-area-mobile a i {
            font-size: 22px;
            color: var(--accent);
        }

        .mobile-menu-toggle {
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 25, 41, 0.98);
            z-index: 998;
            padding: 20px 16px 40px;
            overflow-y: auto;
            backdrop-filter: blur(8px);
        }

        .mobile-menu-overlay.open {
            display: block;
        }

        .mobile-menu-overlay .nav-menu-mobile {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu-overlay .nav-menu-mobile a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 20px;
            color: var(--text-secondary);
            font-size: 16px;
            font-weight: 500;
            border-radius: 12px;
            transition: all var(--transition);
        }

        .mobile-menu-overlay .nav-menu-mobile a i {
            width: 20px;
            text-align: center;
            font-size: 18px;
        }

        .mobile-menu-overlay .nav-menu-mobile a:hover,
        .mobile-menu-overlay .nav-menu-mobile a.active {
            color: var(--text-primary);
            background: rgba(123, 47, 247, 0.12);
        }

        .mobile-menu-overlay .nav-footer-mobile {
            margin-top: 30px;
            padding: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 13px;
            text-align: center;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            padding: 0 0 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

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

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

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章标题区 ===== */
        .article-header {
            margin-bottom: 40px;
        }

        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            font-size: 14px;
            color: var(--accent);
        }

        .article-meta .category-tag {
            background: rgba(123, 47, 247, 0.15);
            color: var(--accent);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(123, 47, 247, 0.2);
        }

        /* ===== 正文区 ===== */
        .article-body {
            max-width: 800px;
            font-size: 18px;
            line-height: 1.85;
            color: var(--text-primary);
        }

        .article-body p {
            margin-bottom: 1.6em;
        }

        .article-body h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 22px;
            font-weight: 600;
            margin: 1.8em 0 0.6em;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .article-body img {
            margin: 1.5em auto;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            max-width: 100%;
        }

        .article-body ul,
        .article-body ol {
            margin: 1.2em 0;
            padding-left: 1.8em;
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 0.5em;
            color: var(--text-secondary);
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: rgba(123, 47, 247, 0.06);
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-body a {
            color: var(--accent-glow);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body a:hover {
            color: var(--accent);
        }

        .article-body code {
            background: rgba(255, 255, 255, 0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent-glow);
        }

        .article-body pre {
            background: var(--primary-light);
            padding: 20px 24px;
            border-radius: var(--radius-card);
            overflow-x: auto;
            border: 1px solid var(--border-glass);
            margin: 1.5em 0;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .related-section h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 24px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-section h3 i {
            color: var(--accent);
        }

        .related-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }

        .related-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: all var(--transition);
            backdrop-filter: blur(8px);
        }

        .related-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-glow);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .related-item .related-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-item .related-title a {
            color: var(--text-primary);
        }

        .related-item .related-title a:hover {
            color: var(--accent-glow);
        }

        .related-item .related-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .related-item .related-date i {
            color: var(--accent);
            font-size: 12px;
        }

        /* ===== 返回链接 ===== */
        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 32px;
            padding: 10px 24px;
            background: rgba(123, 47, 247, 0.1);
            border: 1px solid rgba(123, 47, 247, 0.2);
            border-radius: var(--radius-btn);
            color: var(--accent);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .back-link:hover {
            background: rgba(123, 47, 247, 0.2);
            border-color: var(--accent);
            color: var(--text-primary);
            transform: translateX(-4px);
        }

        /* ===== 文章未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(8px);
        }

        .not-found-box i {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .not-found-box h2 {
            font-size: 28px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .not-found-box .back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all var(--transition);
        }

        .not-found-box .back-home:hover {
            background: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-glass);
            padding: 40px 0 30px;
            margin-top: auto;
        }

        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            text-align: center;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-glow);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }

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

        .footer-socials {
            display: flex;
            gap: 16px;
        }

        .footer-socials a {
            color: var(--text-muted);
            font-size: 20px;
            transition: color var(--transition);
        }

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

        .footer-copy {
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            width: 100%;
        }

        /* ===== 浮动CTA ===== */
        .floating-cta {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 900;
        }

        .floating-cta a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 4px 20px rgba(123, 47, 247, 0.4);
            transition: all var(--transition);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .floating-cta a:hover {
            background: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #fff;
        }

        .floating-cta a i {
            font-size: 18px;
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
            }

            .nav-sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }

            .content-area {
                padding: 24px 16px 40px;
            }

            .article-header h1 {
                font-size: 28px;
            }

            .article-body {
                font-size: 16px;
            }

            .article-body h2 {
                font-size: 24px;
            }

            .article-body h3 {
                font-size: 20px;
            }

            .related-list {
                grid-template-columns: 1fr;
            }

            .floating-cta {
                bottom: 16px;
                right: 16px;
            }

            .floating-cta a {
                padding: 12px 20px;
                font-size: 14px;
            }

            .breadcrumb .current {
                max-width: 180px;
            }
        }

        @media screen and (max-width: 640px) {
            .content-area {
                padding: 16px 12px 32px;
            }

            .article-header h1 {
                font-size: 24px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
                flex-wrap: wrap;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.75;
            }

            .article-body h2 {
                font-size: 22px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .breadcrumb {
                font-size: 12px;
                gap: 6px;
                padding-bottom: 12px;
                margin-bottom: 16px;
            }

            .breadcrumb .current {
                max-width: 120px;
            }

            .related-section {
                margin-top: 40px;
                padding-top: 24px;
            }

            .related-section h3 {
                font-size: 18px;
            }

            .related-item {
                padding: 16px;
            }

            .not-found-box {
                padding: 40px 16px;
            }

            .not-found-box i {
                font-size: 48px;
            }

            .not-found-box h2 {
                font-size: 22px;
            }

            .footer-inner {
                gap: 16px;
            }

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

            .footer-links a {
                font-size: 13px;
            }

            .floating-cta a {
                padding: 10px 16px;
                font-size: 13px;
                gap: 6px;
            }

            .floating-cta a i {
                font-size: 14px;
            }
        }

        @media screen and (min-width: 1025px) {
            .mobile-header {
                display: none;
            }
        }

        /* ===== 辅助类 ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-glow {
            color: var(--accent-glow);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mb-4 {
            margin-bottom: 32px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .gap-1 {
            gap: 8px;
        }
        .gap-2 {
            gap: 16px;
        }
        .flex {
            display: flex;
        }
        .flex-center {
            align-items: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b1a30;
            --primary-light: #112240;
            --accent: #7b2ff7;
            --accent-glow: #00d4ff;
            --bg-body: #0a1929;
            --bg-card: rgba(255, 255, 255, 0.05);
            --border-card: rgba(255, 255, 255, 0.1);
            --text-primary: #e6f1ff;
            --text-secondary: #8892b0;
            --text-weak: #5a6a8a;
            --radius-card: 16px;
            --radius-btn: 30px;
            --radius-input: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.6);
            --font-sans: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --nav-width: 260px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-glow);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-glow);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media (max-width: 640px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ===== Layout: Sidebar + Main ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }
        .nav-sidebar {
            width: var(--nav-width);
            flex-shrink: 0;
            background: var(--primary);
            height: 100vh;
            position: sticky;
            top: 0;
            display: flex;
            flex-direction: column;
            border-right: 1px solid var(--border-card);
            z-index: 100;
            overflow-y: auto;
        }
        .main-content {
            flex: 1;
            min-width: 0;
            background: var(--bg-body);
        }

        /* ===== Sidebar Navigation ===== */
        .logo-area {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .logo-area a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 900;
            color: var(--accent-glow);
            letter-spacing: 1px;
        }
        .logo-area a i {
            font-size: 28px;
            color: var(--accent-glow);
        }
        .logo-area a:hover {
            color: #fff;
        }
        .nav-menu {
            padding: 16px 0;
            flex: 1;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }
        .nav-menu li a i {
            width: 20px;
            font-size: 18px;
            text-align: center;
        }
        .nav-menu li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border-left-color: var(--accent);
        }
        .nav-menu li a.active {
            color: var(--accent-glow);
            background: rgba(0, 212, 255, 0.06);
            border-left-color: var(--accent-glow);
            font-weight: 700;
        }
        .nav-footer {
            padding: 16px 24px 24px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-footer i {
            color: var(--accent);
        }

        /* ===== Mobile Nav Toggle ===== */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 200;
            background: var(--primary);
            border: 1px solid var(--border-card);
            border-radius: 8px;
            width: 44px;
            height: 44px;
            color: var(--text-primary);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(12px);
            transition: background var(--transition);
        }
        .mobile-nav-toggle:hover {
            background: var(--primary-light);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            z-index: 90;
            backdrop-filter: blur(4px);
        }
        .mobile-overlay.active {
            display: block;
        }

        /* ===== Page Header ===== */
        .page-header {
            padding: 40px 0 20px;
        }
        .page-header h1 {
            font-size: 42px;
            font-weight: 900;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #e6f1ff 0%, var(--accent-glow) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-header .breadcrumb {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 8px;
        }
        .page-header .breadcrumb a {
            color: var(--text-secondary);
        }
        .page-header .breadcrumb a:hover {
            color: var(--accent-glow);
        }
        .page-header .breadcrumb span {
            color: var(--text-weak);
            margin: 0 6px;
        }
        .page-header .subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 700px;
        }

        /* ===== Hero Section (Category Banner) ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 60px;
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 100%);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 1;
            padding: 60px 48px;
            max-width: 720px;
        }
        .category-hero .hero-content .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .category-hero .hero-content h2 {
            font-size: 40px;
            font-weight: 900;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .category-hero .hero-content p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .category-hero .hero-content .btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .category-hero .hero-content .btn-group .btn-primary {
            padding: 12px 36px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .category-hero .hero-content .btn-group .btn-primary:hover {
            background: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #fff;
        }
        .category-hero .hero-content .btn-group .btn-secondary {
            padding: 12px 36px;
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--accent-glow);
            font-weight: 600;
            font-size: 16px;
            border: 1px solid var(--accent-glow);
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .category-hero .hero-content .btn-group .btn-secondary:hover {
            background: rgba(0, 212, 255, 0.1);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 60px 0;
        }
        .section-block .section-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 8px;
            text-align: center;
        }
        .section-block .section-sub {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            margin-bottom: 40px;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-block .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-glow));
            border-radius: 2px;
            margin: 0 auto 32px;
        }

        /* ===== Cards ===== */
        .card-glass {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: all var(--transition);
        }
        .card-glass:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-glow);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        }
        .card-glass .card-icon {
            font-size: 40px;
            color: var(--accent-glow);
            margin-bottom: 16px;
        }
        .card-glass h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card-glass p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .card-glass .card-tag {
            display: inline-block;
            background: rgba(123, 47, 247, 0.2);
            color: var(--accent-glow);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 12px;
            margin-top: 12px;
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .feature-grid .feature-wide {
            grid-column: 1 / -1;
        }
        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .steps-grid .step-card {
            counter-increment: step;
            text-align: center;
            padding: 32px 20px;
        }
        .steps-grid .step-card .step-number {
            font-size: 48px;
            font-weight: 900;
            color: var(--accent);
            opacity: 0.4;
            line-height: 1;
            margin-bottom: 12px;
        }
        .steps-grid .step-card h4 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.3);
        }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            user-select: none;
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-q .faq-icon {
            font-size: 20px;
            color: var(--accent-glow);
            transition: transform 0.3s;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.active .faq-q .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-a {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 100%);
            border-radius: var(--radius-card);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h3 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 44px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Stats Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin: 40px 0;
        }
        .stats-row .stat-card {
            text-align: center;
            padding: 28px 16px;
        }
        .stats-row .stat-card .stat-num {
            font-size: 40px;
            font-weight: 900;
            color: var(--accent-glow);
            line-height: 1.2;
        }
        .stats-row .stat-card .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 640px) {
            .stats-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* ===== Content Cards ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-grid .content-card {
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            transition: all var(--transition);
        }
        .content-grid .content-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent-glow);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        }
        .content-grid .content-card .card-img {
            height: 180px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .content-grid .content-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .content-grid .content-card .card-body {
            padding: 20px 20px 24px;
        }
        .content-grid .content-card .card-body .card-cat {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-glow);
            background: rgba(0, 212, 255, 0.12);
            padding: 2px 12px;
            border-radius: 12px;
            margin-bottom: 8px;
        }
        .content-grid .content-card .card-body h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .content-grid .content-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .content-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scene Cards ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scene-grid .scene-card {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px;
        }
        .scene-grid .scene-card .scene-icon {
            font-size: 36px;
            color: var(--accent-glow);
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 212, 255, 0.08);
            border-radius: 12px;
        }
        .scene-grid .scene-card .scene-text h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .scene-grid .scene-card .scene-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-card);
            padding: 40px 0 32px;
            margin-top: 60px;
        }
        .site-footer .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            text-align: center;
        }
        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-glow);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .site-footer .footer-links a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent-glow);
        }
        .site-footer .footer-socials {
            display: flex;
            gap: 16px;
        }
        .site-footer .footer-socials a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
            font-size: 18px;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .site-footer .footer-socials a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent-glow);
            transform: translateY(-2px);
        }
        .site-footer .footer-copy {
            font-size: 14px;
            color: var(--text-weak);
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            width: 100%;
            max-width: 600px;
        }

        /* ===== Floating CTA ===== */
        .floating-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 80;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 12px;
        }
        .floating-cta .float-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 24px rgba(123, 47, 247, 0.4);
            transition: all var(--transition);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .floating-cta .float-btn:hover {
            background: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #fff;
        }
        .floating-cta .float-btn i {
            font-size: 18px;
        }

        /* ===== Responsive: Mobile Sidebar ===== */
        @media (max-width: 900px) {
            .app-layout {
                flex-direction: column;
            }
            .nav-sidebar {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 280px;
                height: 100vh;
                z-index: 100;
                border-right: none;
                box-shadow: 4px 0 32px rgba(0, 0, 0, 0.6);
            }
            .nav-sidebar.open {
                display: flex;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .main-content {
                padding-top: 0;
            }
            .page-header h1 {
                font-size: 30px;
            }
            .category-hero .hero-content {
                padding: 36px 24px;
            }
            .category-hero .hero-content h2 {
                font-size: 28px;
            }
            .section-block .section-title {
                font-size: 26px;
            }
            .floating-cta {
                bottom: 20px;
                right: 20px;
            }
            .floating-cta .float-btn {
                padding: 12px 24px;
                font-size: 14px;
            }
        }
        @media (max-width: 520px) {
            .page-header h1 {
                font-size: 24px;
            }
            .category-hero {
                min-height: 320px;
            }
            .category-hero .hero-content h2 {
                font-size: 22px;
            }
            .category-hero .hero-content p {
                font-size: 15px;
            }
            .category-hero .hero-content .btn-group .btn-primary,
            .category-hero .hero-content .btn-group .btn-secondary {
                padding: 10px 24px;
                font-size: 14px;
            }
            .section-block {
                padding: 36px 0;
            }
            .section-block .section-title {
                font-size: 22px;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .cta-section h3 {
                font-size: 24px;
            }
            .floating-cta .float-btn {
                padding: 10px 18px;
                font-size: 13px;
            }
            .floating-cta .float-btn span {
                display: none;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: 1200px;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .grid-container {
                padding: 0 16px;
            }
        }
        .cell {
            margin-bottom: 0;
        }
        .grid-x>.cell {
            padding: 0;
        }
        .grid-margin-x {
            margin-left: 0;
            margin-right: 0;
        }
        .grid-margin-x>.cell {
            padding: 0 12px;
        }

/* roulang page: category2 */
:root {
            --primary: #0b1a30;
            --primary-light: #112240;
            --accent: #7b2ff7;
            --accent-hover: #00d4ff;
            --bg-body: #0a1929;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.1);
            --text-primary: #e6f1ff;
            --text-secondary: #8892b0;
            --text-muted: #5a6a8a;
            --border-light: rgba(255, 255, 255, 0.1);
            --border-accent: rgba(123, 47, 247, 0.3);
            --radius-card: 16px;
            --radius-btn: 30px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --sidebar-width: 260px;
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus {
            outline: 2px solid var(--accent-hover);
            outline-offset: 2px;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
        }

        /* ===== 导航侧边栏 ===== */
        .nav-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            padding: 24px 0;
            transition: var(--transition);
        }

        .nav-sidebar .logo-area {
            padding: 0 24px 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
        }

        .nav-sidebar .logo-area a {
            font-size: 22px;
            font-weight: 900;
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 1px;
        }
        .nav-sidebar .logo-area a i {
            font-size: 28px;
            color: var(--accent-hover);
        }
        .nav-sidebar .logo-area a:hover {
            color: var(--accent-hover);
        }

        .nav-menu {
            flex: 1;
            padding: 0 12px;
        }
        .nav-menu li {
            margin-bottom: 4px;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-menu li a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .nav-menu li a:hover {
            background: var(--bg-card);
            color: var(--text-primary);
        }
        .nav-menu li a.active {
            background: rgba(123, 47, 247, 0.15);
            color: var(--accent-hover);
            border-left: 3px solid var(--accent-hover);
        }
        .nav-menu li a.active::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--accent-hover);
            border-radius: 0 3px 3px 0;
        }

        .nav-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 13px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-footer i {
            color: var(--accent);
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 汉堡菜单（移动端） ===== */
        .hamburger-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            border: 1px solid var(--border-light);
            color: var(--text-primary);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .hamburger-toggle:hover {
            background: var(--primary-light);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Hero 区 ===== */
        .page-hero {
            position: relative;
            min-height: 50vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 60%, #0d1f3c 100%);
            overflow: hidden;
            padding: 80px 24px 60px;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(123, 47, 247, 0.2) 0%, transparent 70%);
            z-index: 0;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(123, 47, 247, 0.2);
            border: 1px solid var(--border-accent);
            border-radius: 30px;
            padding: 6px 20px;
            font-size: 14px;
            color: var(--accent-hover);
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 900;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 0%, var(--accent-hover) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 20px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .page-hero .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(123, 47, 247, 0.3);
        }
        .page-hero .hero-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-block .section-title h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-block .section-title p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .bg-alt {
            background: var(--primary-light);
        }

        /* ===== 卖点卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(12px);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .feature-card .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(123, 47, 247, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 26px;
            color: var(--accent-hover);
        }
        .feature-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(12px);
            position: relative;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-4px);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 0 20px rgba(123, 47, 247, 0.3);
        }
        .step-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ===== 适用场景 ===== */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scene-card {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: var(--transition);
            backdrop-filter: blur(12px);
        }
        .scene-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
        }
        .scene-card .scene-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(123, 47, 247, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent-hover);
        }
        .scene-card .scene-text h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        .scene-card .scene-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            backdrop-filter: blur(12px);
        }
        .faq-item:hover {
            border-color: var(--border-accent);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-question:hover {
            color: var(--accent-hover);
        }
        .faq-item .faq-question .faq-toggle {
            font-size: 18px;
            color: var(--accent-hover);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }

        /* ===== CTA 区 ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 100%);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            text-align: center;
            padding: 64px 24px;
        }
        .cta-block h2 {
            font-size: 32px;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .cta-block .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 16px 48px;
            border-radius: var(--radius-btn);
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(123, 47, 247, 0.3);
        }
        .cta-block .cta-btn:hover {
            background: var(--accent-hover);
            color: #fff;
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-light);
            padding: 40px 24px 24px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
        }
        .footer-links a:hover {
            color: var(--accent-hover);
        }
        .footer-socials {
            display: flex;
            gap: 16px;
        }
        .footer-socials a {
            color: var(--text-muted);
            font-size: 20px;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            color: var(--accent-hover);
        }
        .footer-copy {
            width: 100%;
            text-align: center;
            color: var(--text-muted);
            font-size: 13px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
            margin-top: 8px;
        }

        /* ===== 浮动 CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 900;
        }
        .float-cta a {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 700;
            box-shadow: 0 4px 24px rgba(123, 47, 247, 0.4);
            transition: var(--transition);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .float-cta a:hover {
            background: var(--accent-hover);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .nav-sidebar.open {
                transform: translateX(0);
            }
            .hamburger-toggle {
                display: flex;
            }
            .sidebar-overlay.open {
                display: block;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-block .section-title h2 {
                font-size: 28px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .scenes-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .float-cta {
                bottom: 20px;
                right: 20px;
            }
            .float-cta a {
                padding: 12px 20px;
                font-size: 14px;
            }
            .page-hero {
                min-height: 40vh;
                padding: 100px 20px 40px;
            }
            .cta-block h2 {
                font-size: 24px;
            }
            .cta-block .cta-btn {
                padding: 14px 32px;
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .container {
                padding: 0 16px;
            }
            .section-block .section-title h2 {
                font-size: 22px;
            }
            .feature-card {
                padding: 24px 16px;
            }
            .scene-card {
                flex-direction: column;
                align-items: center;
                text-align: center;
                padding: 20px 16px;
            }
            .faq-item .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                font-size: 14px;
                padding: 0 16px 14px;
            }
            .float-cta a {
                padding: 10px 16px;
                font-size: 13px;
                gap: 6px;
            }
            .footer-links {
                gap: 12px;
            }
            .footer-links a {
                font-size: 13px;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent-hover);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-2 {
            margin-top: 8px;
        }

/* roulang page: category3 */
/* ========== CSS 设计变量 ========== */
        :root {
            --primary: #0b1a30;
            --primary-light: #112240;
            --accent: #7b2ff7;
            --accent-hover: #00d4ff;
            --accent-glow: rgba(0, 212, 255, 0.6);
            --bg-body: #0a1929;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.10);
            --border-glass: 1px solid rgba(255, 255, 255, 0.10);
            --border-glass-hover: 1px solid rgba(0, 212, 255, 0.30);
            --text-primary: #e6f1ff;
            --text-secondary: #8892b0;
            --text-muted: #5a6a8a;
            --radius-card: 16px;
            --radius-btn: 30px;
            --radius-input: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px var(--accent-glow);
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --nav-width: 260px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

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

        button,
        input,
        textarea {
            font-family: var(--font-family);
            outline: none;
        }

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
        }

        /* ========== Layout ========== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ========== 左侧导航 ========== */
        .nav-sidebar {
            width: var(--nav-width);
            height: 100vh;
            position: fixed;
            top: 0;
            left: 0;
            background-color: var(--primary);
            border-right: var(--border-glass);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            padding: 24px 0;
            backdrop-filter: blur(12px);
            overflow-y: auto;
        }

        .logo-area {
            padding: 8px 24px 24px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 16px;
        }

        .logo-area a {
            font-size: 22px;
            font-weight: 900;
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }

        .logo-area a i {
            font-size: 26px;
            color: var(--accent);
        }

        .nav-menu {
            flex: 1;
            padding: 8px 12px;
        }

        .nav-menu li {
            margin-bottom: 4px;
        }

        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }

        .nav-menu li a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .nav-menu li a:hover {
            background: var(--bg-card);
            color: var(--text-primary);
        }

        .nav-menu li a:hover i {
            color: var(--accent-hover);
        }

        .nav-menu li a.active {
            background: rgba(123, 47, 247, 0.15);
            color: var(--text-primary);
            border-left: 3px solid var(--accent);
        }

        .nav-menu li a.active i {
            color: var(--accent);
        }

        .nav-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-footer i {
            color: var(--accent);
            font-size: 14px;
        }

        /* ========== 主内容区 ========== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .page-wrap {
            flex: 1;
        }

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

        /* ========== 板块间距 ========== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-hover) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-header p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ========== Hero ========== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 60%, #0a1929 100%);
            overflow: hidden;
            padding: 40px 0;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 50%, rgba(123, 47, 247, 0.15) 0%, transparent 60%);
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 800px;
            padding: 40px 24px;
            background: rgba(0, 0, 0, 0.35);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-card);
            border: var(--border-glass);
            box-shadow: var(--shadow-card);
        }

        .hero-content h1 {
            font-size: 56px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #ffffff 0%, var(--accent-hover) 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .hero-sub {
            font-size: 22px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            font-weight: 500;
        }

        .hero-content .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .hero-stats .stat-item {
            text-align: center;
        }

        .hero-stats .stat-item .num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-hover);
            display: block;
        }

        .hero-stats .stat-item .label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            min-height: 48px;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent) 0%, #9b4dff 100%);
            color: #fff;
            box-shadow: 0 4px 20px rgba(123, 47, 247, 0.3);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
            box-shadow: var(--shadow-glow);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .btn-secondary:hover {
            background: rgba(123, 47, 247, 0.1);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 18px 48px;
            font-size: 18px;
            min-height: 56px;
        }

        /* ========== 特色卖点 两列+一列大卡 ========== */
        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .features-grid .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }

        .features-grid .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        }

        .features-grid .feature-card.feature-wide {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 40px 36px;
        }

        .features-grid .feature-card.feature-wide .feature-icon {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(123, 47, 247, 0.2), rgba(0, 212, 255, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 34px;
            color: var(--accent-hover);
        }

        .features-grid .feature-card.feature-wide .feature-text {
            flex: 1;
        }

        .features-grid .feature-card.feature-wide .feature-text h3 {
            font-size: 24px;
            margin-bottom: 8px;
        }

        .features-grid .feature-card.feature-wide .feature-text p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 500px;
        }

        .features-grid .feature-card .feature-icon-sm {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(123, 47, 247, 0.15), rgba(0, 212, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .features-grid .feature-card h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .features-grid .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== 活动分类展示 ========== */
        .category-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .category-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            cursor: default;
        }

        .category-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-6px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
        }

        .category-card .cat-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(123, 47, 247, 0.2), rgba(0, 212, 255, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent-hover);
            transition: transform var(--transition);
        }

        .category-card:hover .cat-icon {
            transform: scale(1.08);
        }

        .category-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .category-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 12px;
        }

        .category-card .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(123, 47, 247, 0.2);
            color: var(--accent);
            border: 1px solid rgba(123, 47, 247, 0.3);
        }

        /* ========== 参与流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-4px);
        }

        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(123, 47, 247, 0.3);
        }

        .step-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .step-card .step-connector {
            position: absolute;
            top: 40px;
            right: -20px;
            font-size: 20px;
            color: var(--accent);
            opacity: 0.4;
        }

        .steps-grid .step-card:last-child .step-connector {
            display: none;
        }

        /* ========== 热门活动推荐 ========== */
        .event-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .event-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }

        .event-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-hover);
            transform: translateY(-6px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
        }

        .event-card .event-img {
            height: 180px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }

        .event-card .event-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .event-card .event-img .event-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(123, 47, 247, 0.85);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .event-card .event-img .event-tag.hot {
            background: rgba(255, 77, 77, 0.85);
        }

        .event-card .event-body {
            padding: 20px 22px 24px;
        }

        .event-card .event-body h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .event-card .event-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .event-card .event-meta .event-date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .event-card .event-meta .event-date i {
            color: var(--accent-hover);
        }

        .event-card .event-meta .event-link {
            color: var(--accent);
            font-weight: 600;
            transition: color var(--transition);
        }

        .event-card .event-meta .event-link:hover {
            color: var(--accent-hover);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.15);
        }

        .faq-item .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition);
            user-select: none;
            gap: 16px;
        }

        .faq-item .faq-question:hover {
            color: var(--accent-hover);
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(123, 47, 247, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--accent);
            transition: transform 0.4s ease;
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            padding: 0 28px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px 28px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1a0b40 100%);
            border-top: var(--border-glass);
            border-bottom: var(--border-glass);
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: 36px;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== 浮动CTA ========== */
        .floating-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            background: rgba(11, 26, 48, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: var(--border-glass);
            border-radius: var(--radius-btn);
            padding: 4px 4px 4px 20px;
            display: flex;
            align-items: center;
            gap: 4px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }

        .floating-cta:hover {
            border-color: var(--accent-hover);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
        }

        .floating-cta span {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .floating-cta .btn {
            padding: 12px 24px;
            font-size: 14px;
            min-height: 42px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--primary);
            border-top: var(--border-glass);
            padding: 40px 0 24px;
        }

        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 20px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }

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

        .footer-socials {
            display: flex;
            gap: 16px;
        }

        .footer-socials a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            border: var(--border-glass);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 18px;
            transition: all var(--transition);
        }

        .footer-socials a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .footer-copy {
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            width: 100%;
        }

        /* ========== 移动端导航 ========== */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary);
            border: var(--border-glass);
            color: var(--text-primary);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            backdrop-filter: blur(12px);
        }

        .mobile-nav-toggle:hover {
            background: var(--primary-light);
            border-color: var(--accent);
        }

        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1049;
            backdrop-filter: blur(4px);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .category-cards {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

        @media (max-width: 768px) {
            :root {
                --nav-width: 0px;
            }

            .nav-sidebar {
                transform: translateX(-100%);
                transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                width: 280px;
                border-right: var(--border-glass);
            }

            .nav-sidebar.open {
                transform: translateX(0);
            }

            .mobile-nav-toggle {
                display: flex;
            }

            .nav-overlay.open {
                display: block;
            }

            .main-content {
                margin-left: 0;
            }

            .hero-content h1 {
                font-size: 36px;
            }

            .hero-content .hero-sub {
                font-size: 18px;
            }

            .section {
                padding: 48px 0;
            }

            .section-header h2 {
                font-size: 28px;
            }

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

            .features-grid .feature-card.feature-wide {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
            }

            .features-grid .feature-card.feature-wide .feature-text p {
                max-width: 100%;
            }

            .category-cards {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

            .step-card .step-connector {
                display: none;
            }

            .event-cards {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stats .stat-item .num {
                font-size: 22px;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .floating-cta {
                bottom: 16px;
                right: 16px;
                padding: 4px 4px 4px 16px;
            }

            .floating-cta span {
                font-size: 12px;
            }

            .floating-cta .btn {
                padding: 10px 18px;
                font-size: 13px;
                min-height: 38px;
            }

            .footer-links {
                gap: 12px;
            }

            .container {
                padding: 0 16px;
            }

            .features-grid .feature-card {
                padding: 24px 20px;
            }

            .category-card {
                padding: 24px 16px;
            }

            .step-card {
                padding: 24px 16px;
            }

            .event-card .event-body {
                padding: 16px 18px 20px;
            }

            .faq-item .faq-question {
                padding: 16px 20px;
                font-size: 15px;
            }

            .faq-item .faq-answer {
                padding: 0 20px;
            }

            .faq-item.active .faq-answer {
                padding: 0 20px 20px 20px;
            }
        }

        @media (max-width: 520px) {
            .category-cards {
                grid-template-columns: 1fr;
            }

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

            .hero-content {
                padding: 24px 16px;
            }

            .hero-content h1 {
                font-size: 28px;
            }

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

            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 16px;
                min-height: 48px;
            }

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

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .floating-cta {
                bottom: 12px;
                right: 12px;
                padding: 4px 4px 4px 12px;
            }

            .floating-cta .btn {
                padding: 8px 14px;
                font-size: 12px;
                min-height: 34px;
            }

            .floating-cta span {
                font-size: 11px;
            }
        }

        /* ========== Foundation Overrides ========== */
        .row {
            max-width: 1200px;
        }

        /* ========== 动画 ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-content {
            animation: fadeInUp 0.8s ease forwards;
        }

        .section {
            animation: fadeInUp 0.6s ease forwards;
        }