/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-bg: #0b0f1a;
            --color-bg-alt: #0f1422;
            --color-bg-card: rgba(26, 32, 53, 0.85);
            --color-bg-card-hover: rgba(30, 40, 65, 0.95);
            --color-surface: #1a2035;
            --color-border: #1e2938;
            --color-border-light: #2a3a4e;
            --color-neon-blue: #00d4ff;
            --color-neon-purple: #7c3aed;
            --color-neon-green: #00ff88;
            --color-neon-pink: #ff0080;
            --color-text-primary: #ffffff;
            --color-text-secondary: #94a3b8;
            --color-text-muted: #64748b;
            --color-accent-gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
            --color-btn-gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
            --color-btn-hover-gradient: linear-gradient(135deg, #00e5ff, #8b5cf6);
            --color-glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
            --color-glow-purple: 0 0 20px rgba(124, 58, 237, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 212, 255, 0.08);
            --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.12);
            --transition-fast: 0.2s ease;
            --transition-normal: 0.35s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--color-neon-blue);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-neon-green);
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text-primary);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            height: var(--nav-height);
            transition: background var(--transition-normal), box-shadow var(--transition-normal);
        }

        .site-header.scrolled {
            background: rgba(11, 15, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: rgba(0, 212, 255, 0.15);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--color-text-primary);
            text-decoration: none;
            transition: opacity var(--transition-fast);
        }
        .logo:hover {
            color: var(--color-text-primary);
            opacity: 0.9;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-accent-gradient);
            border-radius: var(--radius-sm);
            font-size: 18px;
            color: #fff;
            box-shadow: var(--color-glow-blue);
        }
        .logo .logo-text {
            background: var(--color-accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .main-nav a {
            color: var(--color-text-secondary);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent-gradient);
            border-radius: 2px;
            transition: width var(--transition-normal);
            box-shadow: var(--color-glow-blue);
        }
        .main-nav a:hover {
            color: var(--color-text-primary);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .main-nav a.active {
            color: var(--color-neon-blue);
        }
        .main-nav a.active::after {
            width: 100%;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.5);
        }

        .nav-cta {
            padding: 8px 24px;
            background: var(--color-btn-gradient);
            color: #fff !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--color-glow-blue);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
            color: #fff !important;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            color: var(--color-text-primary);
            font-size: 24px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 18px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform var(--transition-normal), opacity var(--transition-normal);
                pointer-events: none;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                font-size: 16px;
                padding: 8px 0;
            }
            .nav-cta {
                align-self: flex-start;
                margin-top: 8px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: var(--color-bg);
            padding: 120px 0 80px;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 212, 255, 0.08), transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(124, 58, 237, 0.06), transparent 50%),
                linear-gradient(to top, var(--color-bg) 0%, transparent 40%, var(--color-bg) 100%);
            z-index: 1;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(11, 15, 26, 0.2) 0%, var(--color-bg) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            color: var(--color-neon-blue);
            font-weight: 500;
            margin-bottom: 28px;
            letter-spacing: 0.5px;
        }
        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: clamp(36px, 6vw, 68px);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #ffffff 30%, #00d4ff 70%, #7c3aed 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        .hero-sub {
            font-size: clamp(18px, 2.2vw, 24px);
            color: var(--color-text-secondary);
            max-width: 720px;
            margin: 0 auto 36px;
            line-height: 1.6;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--color-btn-gradient);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--color-glow-blue);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--color-text-primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            border: 1.5px solid var(--color-border-light);
            transition: border-color var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
        }
        .btn-secondary:hover {
            border-color: var(--color-neon-blue);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-3px);
            color: var(--color-text-primary);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px 60px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 32px;
            font-weight: 800;
            background: var(--color-accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-stat-item .label {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero {
                padding: 100px 0 60px;
            }
            .hero-stats {
                gap: 24px 40px;
            }
            .hero-stat-item .num {
                font-size: 26px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-header .sub {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-header .accent-line {
            width: 60px;
            height: 3px;
            background: var(--color-accent-gradient);
            border-radius: 3px;
            margin: 18px auto 0;
            box-shadow: var(--color-glow-blue);
        }

        /* ===== 特色/优势板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 30px 30px;
            transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
            backdrop-filter: blur(4px);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-card-hover);
        }

        .feature-card .icon-box {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 212, 255, 0.1);
            border-radius: var(--radius-md);
            font-size: 24px;
            color: var(--color-neon-blue);
            margin-bottom: 20px;
            transition: background var(--transition-fast), box-shadow var(--transition-fast);
        }
        .feature-card:hover .icon-box {
            background: rgba(0, 212, 255, 0.18);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 22px;
            }
        }

        /* ===== 资讯列表板块 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-card-hover);
        }

        .news-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .news-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }
        .news-card .card-meta .tag {
            padding: 2px 12px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-neon-blue);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        .news-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card .card-body h3 a {
            color: var(--color-text-primary);
            transition: color var(--transition-fast);
        }
        .news-card .card-body h3 a:hover {
            color: var(--color-neon-blue);
        }
        .news-card .card-body p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
        }
        .news-card .card-footer-link {
            margin-top: 16px;
            font-size: 14px;
            color: var(--color-neon-blue);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            transition: gap var(--transition-fast);
        }
        .news-card .card-footer-link:hover {
            gap: 12px;
            color: var(--color-neon-green);
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--color-text-muted);
            font-size: 16px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card .card-img {
                height: 180px;
            }
        }

        /* ===== 热门赛事/服务卡片 ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            transform: translateY(-6px);
            border-color: rgba(124, 58, 237, 0.25);
            box-shadow: var(--shadow-card-hover);
        }

        .service-card .s-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .service-card .s-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .s-badge {
            display: inline-block;
            padding: 2px 14px;
            background: rgba(124, 58, 237, 0.12);
            color: var(--color-neon-purple);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .service-card p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
        }
        .service-card .s-footer {
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .service-card .s-footer .s-link {
            color: var(--color-neon-purple);
            font-weight: 500;
            transition: color var(--transition-fast);
        }
        .service-card .s-footer .s-link:hover {
            color: var(--color-neon-green);
        }

        @media (max-width: 992px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 20px;
            text-align: center;
            transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
        }
        .stat-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-card-hover);
        }
        .stat-card .stat-icon {
            font-size: 32px;
            color: var(--color-neon-blue);
            margin-bottom: 12px;
        }
        .stat-card .stat-num {
            font-size: 36px;
            font-weight: 800;
            background: var(--color-accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

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

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition-fast);
            gap: 16px;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--color-neon-blue);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal), padding var(--transition-normal);
            padding: 0 24px;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--color-bg-alt);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(0, 212, 255, 0.05), transparent 70%);
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            backdrop-filter: blur(8px);
            box-shadow: var(--shadow-card);
        }
        .cta-box h2 {
            font-size: clamp(26px, 3.2vw, 36px);
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-box p {
            color: var(--color-text-secondary);
            font-size: 17px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .cta-box .btn-primary {
            font-size: 17px;
            padding: 16px 44px;
        }
        .cta-box .cta-note {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 18px;
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 36px 24px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: 48px 0 28px;
        }

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

        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 18px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            color: var(--color-text-secondary);
            font-size: 16px;
            transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        }
        .footer-social a:hover {
            background: var(--color-neon-blue);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--color-text-primary);
        }
        .footer-col a {
            display: block;
            color: var(--color-text-secondary);
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-neon-blue);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-neon-blue);
        }

        @media (max-width: 992px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 额外响应式 ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 60px 0;
            }
            .section-header {
                margin-bottom: 40px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 44px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header .sub {
                font-size: 15px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-sub {
                font-size: 16px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== 选择文本样式 ===== */
        ::selection {
            background: rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-border-light);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-muted);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --clr-bg: #0a0e17;
            --clr-bg-alt: #111827;
            --clr-card: #1a1f2e;
            --clr-card-hover: #222a3e;
            --clr-neon: #00f5d4;
            --clr-neon-dim: rgba(0, 245, 212, 0.12);
            --clr-neon-glow: rgba(0, 245, 212, 0.35);
            --clr-accent: #f97316;
            --clr-accent-glow: rgba(249, 115, 22, 0.30);
            --clr-text: #f1f5f9;
            --clr-text-dim: #94a3b8;
            --clr-text-muted: #64748b;
            --clr-border: rgba(0, 245, 212, 0.15);
            --clr-border-light: rgba(255, 255, 255, 0.06);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px var(--clr-border);
            --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.60), 0 0 0 1px var(--clr-neon);
            --shadow-glow: 0 0 30px var(--clr-neon-glow);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --space-section: 80px;
            --space-section-mobile: 56px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            font-size: 16px;
        }

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

        a:hover {
            color: #fff;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--clr-border);
            transition: var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.03em;
        }

        .logo .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-neon);
            color: #0a0e17;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            box-shadow: 0 0 20px var(--clr-neon-glow);
        }

        .logo .logo-text {
            background: linear-gradient(135deg, #fff 60%, var(--clr-neon));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--clr-text-dim);
            padding: 6px 2px;
            position: relative;
            transition: var(--transition);
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--clr-neon);
            box-shadow: 0 0 12px var(--clr-neon-glow);
            transition: var(--transition);
            border-radius: 2px;
        }

        .main-nav a:hover {
            color: #fff;
        }

        .main-nav a:hover::after {
            width: 100%;
        }

        .main-nav a.active {
            color: #fff;
        }

        .main-nav a.active::after {
            width: 100%;
        }

        .main-nav .nav-cta {
            padding: 8px 20px;
            background: var(--clr-neon);
            color: #0a0e17 !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 0 20px var(--clr-neon-glow);
            transition: var(--transition);
        }

        .main-nav .nav-cta::after {
            display: none;
        }

        .main-nav .nav-cta:hover {
            background: #fff;
            color: #0a0e17 !important;
            box-shadow: 0 0 30px rgba(255, 255, 255, 0.25);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px;
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
        }

        @media (max-width: 820px) {
            .main-nav {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px 32px;
                gap: 16px;
                border-bottom: 1px solid var(--clr-border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                align-items: stretch;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .main-nav a {
                font-size: 1.1rem;
                padding: 10px 0;
                text-align: center;
            }

            .main-nav a::after {
                bottom: 4px;
            }

            .main-nav .nav-cta {
                justify-content: center;
                margin-top: 8px;
            }

            .nav-toggle {
                display: flex;
            }
        }

        /* ===== Hero Section ===== */
        .hero {
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            padding: 140px 0 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg,
                    rgba(10, 14, 23, 0.92) 30%,
                    rgba(10, 14, 23, 0.60) 70%,
                    rgba(10, 14, 23, 0.40) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 180px;
            background: linear-gradient(to top, var(--clr-bg), transparent);
            z-index: 2;
        }

        .hero .container {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 860px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: var(--clr-neon-dim);
            border: 1px solid var(--clr-border);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--clr-neon);
            font-weight: 500;
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero h1 {
            font-size: clamp(2.4rem, 6vw, 4.2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            line-height: 1.15;
            letter-spacing: -0.03em;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--clr-neon), #48e5d0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: clamp(1.05rem, 1.8vw, 1.25rem);
            color: var(--clr-text-dim);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            background: var(--clr-neon);
            color: #0a0e17 !important;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50px;
            box-shadow: 0 0 30px var(--clr-neon-glow);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: #fff;
            color: #0a0e17 !important;
            box-shadow: 0 0 45px rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            background: transparent;
            color: var(--clr-text) !important;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 50px;
            border: 1px solid var(--clr-border);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--clr-neon);
            background: var(--clr-neon-dim);
            color: #fff !important;
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid var(--clr-border-light);
        }

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

        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--clr-neon);
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-top: 4px;
        }

        @media (max-width: 640px) {
            .hero {
                min-height: 80vh;
                padding: 110px 0 60px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: var(--space-section) 0;
        }

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

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .section-header .subtitle {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--clr-neon);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            color: #fff;
            margin-bottom: 16px;
        }

        .section-header p {
            color: var(--clr-text-dim);
            font-size: 1.05rem;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--space-section-mobile) 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== Features / 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }

        .feature-card {
            background: var(--clr-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--clr-border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--clr-neon), transparent);
            opacity: 0;
            transition: var(--transition);
        }

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

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

        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-neon-dim);
            border-radius: var(--radius-sm);
            font-size: 1.4rem;
            color: var(--clr-neon);
            margin-bottom: 18px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--clr-neon);
            color: #0a0e17;
            box-shadow: 0 0 24px var(--clr-neon-glow);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--clr-text-dim);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* ===== Sport Categories 赛事分类 ===== */
        .sport-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }

        .sport-card {
            background: var(--clr-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--clr-border-light);
            transition: var(--transition);
            cursor: pointer;
        }

        .sport-card:hover {
            transform: translateY(-6px);
            border-color: var(--clr-border);
            box-shadow: var(--shadow-card-hover);
        }

        .sport-card .card-img {
            height: 200px;
            background: center center / cover no-repeat;
            position: relative;
        }

        .sport-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, var(--clr-card) 0%, transparent 60%);
        }

        .sport-card .card-body {
            padding: 22px 24px 26px;
            position: relative;
        }

        .sport-card .card-tag {
            display: inline-block;
            padding: 2px 14px;
            background: var(--clr-neon-dim);
            border: 1px solid var(--clr-border);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--clr-neon);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .sport-card h3 {
            font-size: 1.25rem;
            color: #fff;
            margin-bottom: 8px;
        }

        .sport-card p {
            color: var(--clr-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .sport-card .card-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--clr-neon);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .sport-card .card-link i {
            transition: var(--transition);
            font-size: 0.8rem;
        }

        .sport-card:hover .card-link i {
            transform: translateX(4px);
        }

        /* ===== Process / 服务流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            padding: 28px 16px;
            position: relative;
        }

        .process-step::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: var(--clr-neon-dim);
            border: 1px solid var(--clr-border);
            border-radius: 50%;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--clr-neon);
            transition: var(--transition);
        }

        .process-step:hover::before {
            background: var(--clr-neon);
            color: #0a0e17;
            box-shadow: 0 0 24px var(--clr-neon-glow);
        }

        .process-step h3 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
        }

        .process-step p {
            color: var(--clr-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .process-step:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -20px;
            top: 40px;
            font-size: 1.6rem;
            color: var(--clr-neon);
            opacity: 0.4;
        }

        @media (max-width: 768px) {
            .process-step:not(:last-child)::after {
                display: none;
            }
        }

        /* ===== Scenarios / 适用场景 ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .scenario-item {
            background: var(--clr-card);
            border-radius: var(--radius);
            padding: 24px 22px;
            border: 1px solid var(--clr-border-light);
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .scenario-item:hover {
            border-color: var(--clr-border);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .scenario-item .si-icon {
            width: 44px;
            height: 44px;
            min-width: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-neon-dim);
            border-radius: var(--radius-sm);
            color: var(--clr-neon);
            font-size: 1.1rem;
        }

        .scenario-item h4 {
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 4px;
        }

        .scenario-item p {
            color: var(--clr-text-dim);
            font-size: 0.88rem;
            line-height: 1.6;
        }

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

        .faq-item {
            background: var(--clr-card);
            border-radius: var(--radius);
            border: 1px solid var(--clr-border-light);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--clr-border);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--clr-text);
            background: transparent;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--clr-neon);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--clr-neon);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            padding: 0 24px;
            color: var(--clr-text-dim);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 260px;
            padding: 0 24px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            position: relative;
            padding: 80px 0;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92) 40%, rgba(10, 14, 23, 0.70) 100%);
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--clr-text-dim);
            font-size: 1.08rem;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border-light);
            padding: 56px 0 0;
        }

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

        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .footer-brand p {
            color: var(--clr-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 18px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-card);
            border-radius: 50%;
            color: var(--clr-text-dim);
            font-size: 1.1rem;
            border: 1px solid var(--clr-border-light);
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--clr-neon);
            color: #0a0e17;
            border-color: var(--clr-neon);
            box-shadow: 0 0 20px var(--clr-neon-glow);
        }

        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--clr-text-dim);
            padding: 5px 0;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--clr-border-light);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--clr-text-muted);
        }

        .footer-bottom a {
            color: var(--clr-text-dim);
        }

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

        @media (max-width: 820px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--clr-text-muted);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--clr-neon);
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 480px) {
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .sport-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --color-bg: #0a0e1a;
            --color-bg-alt: #111827;
            --color-bg-card: #1a1f2e;
            --color-bg-card-hover: #1f2638;
            --color-primary: #00d4ff;
            --color-primary-glow: rgba(0, 212, 255, 0.20);
            --color-primary-dim: rgba(0, 212, 255, 0.08);
            --color-secondary: #7c3aed;
            --color-secondary-glow: rgba(124, 58, 237, 0.20);
            --color-accent: #ff6b35;
            --color-accent-glow: rgba(255, 107, 53, 0.20);
            --color-text: #f0f4ff;
            --color-text-secondary: #c8d0e0;
            --color-text-muted: #8892b0;
            --color-border: #1e293b;
            --color-border-light: #2a3650;
            --color-glow: rgba(0, 212, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.40), 0 0 0 1px rgba(0, 212, 255, 0.06);
            --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(0, 212, 255, 0.15);
            --shadow-glow: 0 0 30px var(--color-primary-glow);
            --shadow-glow-secondary: 0 0 30px var(--color-secondary-glow);
            --transition: 0.30s cubic-bezier(0.22, 1, 0.36, 1);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-main);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #66e5ff;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 22px;
            color: var(--color-text);
            letter-spacing: 0.5px;
        }
        .logo:hover {
            color: var(--color-text);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 0 20px var(--color-primary-glow);
        }
        .logo-text {
            background: linear-gradient(90deg, var(--color-primary), #66e5ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            color: var(--color-text);
            background: var(--color-primary-dim);
        }
        .main-nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-dim);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-primary);
            box-shadow: 0 0 12px var(--color-primary);
        }
        .main-nav a.nav-cta {
            background: linear-gradient(135deg, var(--color-primary), #00a8cc);
            color: #0a0e1a;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 20px var(--color-primary-glow);
            margin-left: 8px;
        }
        .main-nav a.nav-cta:hover {
            box-shadow: 0 0 36px var(--color-primary-glow);
            transform: translateY(-1px);
            color: #0a0e1a;
        }
        .main-nav a.nav-cta i {
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--color-text);
            background: none;
            border: none;
            padding: 6px;
            cursor: pointer;
        }
        @media (max-width: 820px) {
            .main-nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(10, 14, 26, 0.97);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .main-nav a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
        }

        /* ===== Hero 文章头 ===== */
        .article-hero {
            padding-top: calc(var(--header-h) + 40px);
            padding-bottom: 48px;
            background: var(--color-bg-alt);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.50) 0%, var(--color-bg-alt) 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb span {
            color: var(--color-text-secondary);
        }
        .breadcrumb .sep {
            color: var(--color-border-light);
            font-size: 12px;
        }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.3px;
            color: var(--color-text);
            max-width: 880px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 14px;
            color: var(--color-text-muted);
            align-items: center;
        }
        .article-meta .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--color-primary-dim);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(0, 212, 255, 0.10);
        }
        .article-meta .tag i {
            font-size: 12px;
        }
        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .date i {
            font-size: 13px;
        }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: 48px 0 60px;
            background: var(--color-bg);
        }
        .article-body .container {
            max-width: 820px;
        }
        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--color-text-secondary);
        }
        .article-content p {
            margin-bottom: 1.5em;
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--color-text);
            margin-top: 2em;
            margin-bottom: 0.8em;
            font-weight: 700;
            letter-spacing: -0.2px;
        }
        .article-content h2 {
            font-size: 26px;
        }
        .article-content h3 {
            font-size: 22px;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.8em 0;
            box-shadow: var(--shadow-card);
        }
        .article-content ul,
        .article-content ol {
            margin: 1.2em 0;
            padding-left: 24px;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-bg-card);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-secondary);
        }
        .article-content a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: #66e5ff;
        }
        .article-content code {
            background: var(--color-bg-card);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-accent);
        }
        .article-content pre {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            overflow-x: auto;
            margin: 1.6em 0;
            border: 1px solid var(--color-border);
        }
        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--color-text-secondary);
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
        }
        .article-not-found i {
            font-size: 48px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .article-not-found h2 {
            font-size: 24px;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: #0a0e1a;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }
        .btn-back:hover {
            background: #66e5ff;
            color: #0a0e1a;
            box-shadow: 0 0 30px var(--color-primary-glow);
        }

        /* ===== 推荐文章 ===== */
        .section-related {
            padding: 60px 0;
            background: var(--color-bg-alt);
        }
        .section-title {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 16px;
            color: var(--color-text-muted);
            margin-bottom: 36px;
            max-width: 600px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.20);
            box-shadow: var(--shadow-card-hover);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .related-card .card-body a {
            color: inherit;
        }
        .related-card .card-body a:hover h3 {
            color: var(--color-primary);
        }
        @media (max-width: 820px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: 60px 0;
            background: var(--color-bg);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            gap: 16px;
            user-select: none;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
        }
        .faq-question i {
            color: var(--color-primary);
            font-size: 14px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text-secondary);
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-answer p {
            margin-bottom: 0.6em;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .section-cta {
            padding: 64px 0;
            background: var(--color-bg-alt);
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .section-cta .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-box {
            max-width: 720px;
            margin: 0 auto;
            padding: 40px 32px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
        }
        .cta-box h2 {
            font-size: clamp(22px, 2.8vw, 32px);
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #00a8cc);
            color: #0a0e1a;
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: 0 0 24px var(--color-primary-glow);
        }
        .cta-btn:hover {
            box-shadow: 0 0 48px var(--color-primary-glow);
            transform: translateY(-2px);
            color: #0a0e1a;
        }
        .cta-btn i {
            font-size: 15px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #060a14;
            border-top: 1px solid var(--color-border);
            padding: 48px 0 24px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-muted);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-dim);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--color-text-muted);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        @media (max-width: 820px) {
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 ===== */
        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
            border: none;
            margin: 0;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-border-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-muted);
        }

        /* ===== 选中 ===== */
        ::selection {
            background: var(--color-primary);
            color: #0a0e1a;
        }

        /* ===== 动效 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(18px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease both;
        }
        .animate-in-d1 {
            animation-delay: 0.1s;
        }
        .animate-in-d2 {
            animation-delay: 0.2s;
        }
        .animate-in-d3 {
            animation-delay: 0.3s;
        }