/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-light: #f8f9fa;
            --bg-dark: #0d1b2a;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #333333;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); line-height: 1.3; font-weight: 700; }

        /* ===== 容器 ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 2px 30px rgba(0,0,0,0.06); }
        .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-area { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .logo-icon {
            width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
            font-weight: 900; font-size: 18px; color: #fff; letter-spacing: -0.5px;
        }
        .logo-text {
            font-size: 22px; font-weight: 800; color: var(--text-dark);
            letter-spacing: -0.3px;
        }
        .logo-text span { color: var(--primary); }
        .nav-menu { display: flex; align-items: center; gap: 8px; }
        .nav-menu a {
            padding: 8px 18px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500;
            color: var(--text-body); transition: var(--transition); position: relative;
        }
        .nav-menu a:hover { background: rgba(230,57,70,0.06); color: var(--primary); }
        .nav-menu a.active {
            background: var(--primary); color: var(--text-white); font-weight: 600;
            box-shadow: 0 4px 14px rgba(230,57,70,0.3);
        }
        .nav-cta {
            padding: 9px 24px; border-radius: 50px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important; font-weight: 600; font-size: 14px; box-shadow: 0 4px 16px rgba(230,57,70,0.3);
        }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(230,57,70,0.4); }
        .nav-toggle { display: none; background: none; font-size: 28px; color: var(--text-dark); cursor: pointer; padding: 4px; }

        /* ===== 首屏 Hero（分屏风格） ===== */
        .hero-section {
            padding: 120px 0 80px; min-height: 85vh;
            background: linear-gradient(135deg, #0d1b2a 0%, #1b2838 50%, #1a1a2e 100%);
            position: relative; overflow: hidden;
            display: flex; align-items: center;
        }
        .hero-section::before {
            content: ''; position: absolute; top: -30%; right: -10%; width: 60%; height: 140%;
            background: radial-gradient(ellipse at center, rgba(230,57,70,0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 6px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary-light));
        }
        .hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 2; }
        .hero-content h1 {
            font-size: 48px; font-weight: 900; color: var(--text-white); line-height: 1.15;
            margin-bottom: 20px; letter-spacing: -1px;
        }
        .hero-content h1 .highlight { background: linear-gradient(135deg, var(--primary-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-content p {
            font-size: 18px; color: rgba(255,255,255,0.7); max-width: 520px; margin-bottom: 32px; line-height: 1.8;
        }
        .hero-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
        .hero-badge {
            padding: 6px 16px; border-radius: 50px; font-size: 13px; font-weight: 500;
            background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.85); border: 1px solid rgba(255,255,255,0.12);
        }
        .hero-badge i { margin-right: 6px; color: var(--accent); }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
            border-radius: 50px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; font-weight: 700; font-size: 16px; transition: var(--transition);
            box-shadow: 0 8px 30px rgba(230,57,70,0.35); border: none; cursor: pointer;
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 40px rgba(230,57,70,0.45); color: #fff; }
        .btn-secondary {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 36px;
            border-radius: 50px; background: rgba(255,255,255,0.06); color: var(--text-white);
            font-weight: 600; font-size: 16px; border: 1.5px solid rgba(255,255,255,0.2);
            transition: var(--transition); cursor: pointer;
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.4); color: #fff; }
        .hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
        .hero-card {
            background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-lg); padding: 40px 36px; width: 100%; max-width: 440px;
            backdrop-filter: blur(12px);
        }
        .hero-card-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
        .hero-stat-item { text-align: center; }
        .hero-stat-number { font-size: 32px; font-weight: 900; color: var(--text-white); line-height: 1.2; }
        .hero-stat-number .accent { color: var(--accent); }
        .hero-stat-number .prim { color: var(--primary-light); }
        .hero-stat-label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }
        .hero-card-divider { height: 1px; background: rgba(255,255,255,0.08); margin: 20px 0; }
        .hero-card-list { display: flex; flex-direction: column; gap: 12px; }
        .hero-card-item { display: flex; align-items: center; gap: 12px; font-size: 14px; color: rgba(255,255,255,0.7); }
        .hero-card-item i { width: 20px; color: var(--accent); font-size: 14px; }
        .hero-card-item .tag {
            padding: 2px 12px; border-radius: 50px; font-size: 11px; font-weight: 600;
            background: rgba(230,57,70,0.2); color: var(--primary-light); margin-left: auto;
        }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-card); }
        .section-dark { background: var(--bg-dark); }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header h2 {
            font-size: 36px; font-weight: 800; margin-bottom: 12px; color: var(--text-dark);
            letter-spacing: -0.5px;
        }
        .section-header p {
            font-size: 17px; color: var(--text-light); max-width: 580px; margin: 0 auto; line-height: 1.8;
        }
        .section-header .label {
            display: inline-block; padding: 4px 18px; border-radius: 50px; font-size: 12px; font-weight: 700;
            text-transform: uppercase; letter-spacing: 1px; background: rgba(230,57,70,0.08); color: var(--primary);
            margin-bottom: 12px;
        }

        /* ===== 特色板块 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card); border-radius: var(--radius); padding: 36px 28px;
            box-shadow: var(--shadow); border: 1px solid var(--border-light);
            transition: var(--transition); text-align: center;
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .feature-icon {
            width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; font-size: 28px; color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .feature-icon.alt { background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); }
        .feature-icon.acc { background: linear-gradient(135deg, var(--accent), #e07a2f); }
        .feature-card h3 { font-size: 20px; margin-bottom: 10px; }
        .feature-card p { font-size: 15px; color: var(--text-light); line-height: 1.7; }

        /* ===== 分类入口 ===== */
        .categories-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            border-radius: var(--radius); overflow: hidden; background: var(--bg-card);
            box-shadow: var(--shadow); border: 1px solid var(--border-light);
            transition: var(--transition); display: flex; flex-direction: column;
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .category-card-top { padding: 32px 28px 20px; display: flex; align-items: center; gap: 16px; }
        .category-card-top .cat-icon {
            width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
            font-size: 24px; color: #fff; flex-shrink: 0;
        }
        .category-card-top .cat-icon.red { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
        .category-card-top .cat-icon.blue { background: linear-gradient(135deg, var(--secondary), var(--secondary-light)); }
        .category-card-top h3 { font-size: 20px; font-weight: 700; margin-bottom: 2px; }
        .category-card-top p { font-size: 14px; color: var(--text-light); }
        .category-card .cat-body { padding: 0 28px 24px; flex: 1; }
        .category-card .cat-body ul { display: flex; flex-direction: column; gap: 8px; }
        .category-card .cat-body ul li {
            font-size: 14px; color: var(--text-body); display: flex; align-items: center; gap: 8px;
        }
        .category-card .cat-body ul li i { color: var(--primary); font-size: 12px; }
        .category-card .cat-footer { padding: 16px 28px; border-top: 1px solid var(--border-light); }
        .category-card .cat-footer a {
            font-size: 14px; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 8px;
        }
        .category-card .cat-footer a:hover { gap: 12px; }

        /* ===== 热门赛事 ===== */
        .events-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .event-card {
            background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow); border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .event-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .event-card-img {
            height: 160px; background: linear-gradient(135deg, #1d3557, #457b9d);
            display: flex; align-items: center; justify-content: center; font-size: 48px; color: rgba(255,255,255,0.15);
            position: relative;
        }
        .event-card-img .event-badge {
            position: absolute; top: 12px; left: 12px; padding: 4px 14px; border-radius: 50px;
            font-size: 11px; font-weight: 700; background: var(--primary); color: #fff;
        }
        .event-card-img .event-badge.live { background: #2a9d8f; }
        .event-card-body { padding: 20px 22px 22px; }
        .event-card-body h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
        .event-card-body .meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; margin-bottom: 10px; }
        .event-card-body .meta i { margin-right: 4px; }
        .event-card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
        .stat-card {
            background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius); padding: 36px 20px; backdrop-filter: blur(8px);
        }
        .stat-card .num { font-size: 42px; font-weight: 900; color: var(--text-white); line-height: 1.2; }
        .stat-card .num .prim { color: var(--primary-light); }
        .stat-card .num .acc { color: var(--accent); }
        .stat-card .label { font-size: 15px; color: rgba(255,255,255,0.55); margin-top: 6px; }

        /* ===== 最新资讯（CMS 列表） ===== */
        .news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .news-card {
            background: var(--bg-card); border-radius: var(--radius); padding: 24px 28px;
            box-shadow: var(--shadow); border: 1px solid var(--border-light);
            transition: var(--transition); display: flex; flex-direction: column;
        }
        .news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
        .news-card .cat-tag {
            display: inline-block; padding: 2px 14px; border-radius: 50px; font-size: 12px; font-weight: 600;
            background: rgba(230,57,70,0.08); color: var(--primary); margin-bottom: 10px; width: fit-content;
        }
        .news-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .news-card h3 a { color: var(--text-dark); }
        .news-card h3 a:hover { color: var(--primary); }
        .news-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; flex: 1; }
        .news-card .meta { font-size: 13px; color: var(--text-light); margin-top: 14px; display: flex; gap: 16px; border-top: 1px solid var(--border-light); padding-top: 14px; }
        .news-card .meta i { margin-right: 4px; }
        .news-empty { grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--text-light); font-size: 16px; background: var(--bg-card); border-radius: var(--radius); border: 1px dashed var(--border); }

        /* ===== 平台流程 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .steps-grid::before {
            content: ''; position: absolute; top: 40px; left: 10%; right: 10%; height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary-light));
            opacity: 0.3; z-index: 0;
        }
        .step-card { text-align: center; position: relative; z-index: 1; background: var(--bg-card); padding: 28px 16px; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border-light); }
        .step-num {
            width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px; font-size: 20px; font-weight: 900; color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 16px rgba(230,57,70,0.3);
        }
        .step-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
        .step-card p { font-size: 14px; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-sm); border: 1px solid var(--border-light);
            overflow: hidden; transition: var(--transition);
        }
        .faq-item summary {
            padding: 18px 24px; font-size: 16px; font-weight: 600; color: var(--text-dark);
            cursor: pointer; display: flex; justify-content: space-between; align-items: center;
            list-style: none; transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f107'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 18px;
            color: var(--text-light); transition: var(--transition);
        }
        .faq-item[open] summary::after { transform: rotate(180deg); color: var(--primary); }
        .faq-item[open] summary { background: rgba(230,57,70,0.03); }
        .faq-item .content { padding: 0 24px 18px; font-size: 15px; color: var(--text-light); line-height: 1.8; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1b2838 100%);
            padding: 80px 0; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(230,57,70,0.08) 0%, transparent 60%);
        }
        .cta-section h2 { font-size: 36px; font-weight: 800; color: var(--text-white); margin-bottom: 14px; position: relative; z-index: 2; }
        .cta-section p { font-size: 17px; color: rgba(255,255,255,0.6); max-width: 500px; margin: 0 auto 28px; position: relative; z-index: 2; }
        .cta-section .btn-primary { font-size: 17px; padding: 16px 44px; position: relative; z-index: 2; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0a0f1a; color: rgba(255,255,255,0.6); padding: 56px 0 28px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo-text { color: var(--text-white); font-size: 20px; }
        .footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 12px; max-width: 280px; }
        .footer-col h5 { font-size: 15px; font-weight: 700; color: var(--text-white); margin-bottom: 16px; }
        .footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.5); padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px;
            display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
            font-size: 13px; color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.04);
            display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.4);
            transition: var(--transition); font-size: 16px;
        }
        .footer-social a:hover { background: rgba(230,57,70,0.2); color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .hero-content h1 { font-size: 38px; }
            .hero-visual { order: -1; }
            .hero-card { max-width: 100%; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .events-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .nav-toggle { display: block; }
            .nav-menu.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 20px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 4px; }
            .nav-menu.open a { padding: 12px 16px; border-radius: var(--radius-sm); }
            .hero-section { padding: 100px 0 60px; min-height: auto; }
            .hero-content h1 { font-size: 30px; }
            .hero-content p { font-size: 16px; }
            .hero-card { padding: 28px 20px; }
            .hero-card-stats { gap: 12px; }
            .hero-stat-number { font-size: 26px; }
            .section { padding: 56px 0; }
            .section-header h2 { font-size: 28px; }
            .features-grid { grid-template-columns: 1fr; }
            .categories-grid { grid-template-columns: 1fr; }
            .events-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card { padding: 24px 12px; }
            .stat-card .num { font-size: 32px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .cta-section h2 { font-size: 28px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-content h1 { font-size: 26px; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-secondary { justify-content: center; width: 100%; }
            .hero-card-stats { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .section-header h2 { font-size: 24px; }
            .logo-text { font-size: 18px; }
            .nav-cta { padding: 7px 16px; font-size: 13px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #f1948a;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --bg-section-alt: #f0f2f5;
            --text-primary: #1a1a2e;
            --text-secondary: #555555;
            --text-light: #888888;
            --text-white: #ffffff;
            --border-color: #e8e8e8;
            --border-light: #f0f0f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 16px 48px rgba(231, 76, 60, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(26, 26, 46, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(26, 26, 46, 0.99);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: 8px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-menu a.active {
            color: #fff;
            background: rgba(231, 76, 60, 0.2);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-menu a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: 8px 24px;
            border-radius: 24px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.3);
        }
        .nav-menu a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(231, 76, 60, 0.4);
            background: linear-gradient(135deg, #c0392b, #e67e22);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* Mobile Nav */
        @media (max-width: 860px) {
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(26, 26, 46, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
                max-height: 70vh;
                overflow-y: auto;
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-menu a {
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
                border-radius: 8px;
            }
            .nav-menu a.active::after {
                display: none;
            }
            .nav-menu a.nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo-text {
                font-size: 16px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
        }

        /* ===== Hero ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(231, 76, 60, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(243, 156, 18, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-hero h1 span {
            color: var(--primary);
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .hero-badges .badge {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.9);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-badges .badge i {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 120px 0 60px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 14px;
            }
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-title h2 span {
            color: var(--primary);
        }
        .section-title p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-title .title-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            margin: 16px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(231, 76, 60, 0.15);
        }
        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: #e8ecf1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            color: var(--text-light);
            position: relative;
            overflow: hidden;
        }
        .card-image .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(0, 0, 0, 0.3) 0%, transparent 60%);
        }
        .card-image .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            z-index: 1;
        }
        .card-image .card-date {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 12px;
            z-index: 1;
        }
        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-primary);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }
        .card-body .card-meta span {
            display: flex;
            align-items: center;
        }
        @media (max-width: 640px) {
            .card-image {
                height: 160px;
            }
            .card-body {
                padding: 18px;
            }
            .card-body h3 {
                font-size: 16px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(231, 76, 60, 0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
            color: var(--primary-dark);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: 18px;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 17px;
            border-radius: 28px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        .badge-primary {
            background: rgba(231, 76, 60, 0.1);
            color: var(--primary);
            border-color: rgba(231, 76, 60, 0.2);
        }
        .badge-accent {
            background: rgba(243, 156, 18, 0.1);
            color: var(--accent);
            border-color: rgba(243, 156, 18, 0.2);
        }
        .badge-live {
            background: rgba(231, 76, 60, 0.15);
            color: var(--primary);
            border-color: rgba(231, 76, 60, 0.25);
            animation: pulse-dot 2s infinite;
        }
        .badge-live::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            display: inline-block;
            animation: live-blink 1s infinite;
        }
        @keyframes live-blink {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.2);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(231, 76, 60, 0);
            }
        }

        /* ===== Stats / Data Blocks ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .stat-number {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 860px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 32px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
        }

        /* ===== Category Tabs ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 40px;
        }
        .category-tabs .tab-btn {
            padding: 8px 22px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: var(--bg-white);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .category-tabs .tab-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(231, 76, 60, 0.04);
        }
        .category-tabs .tab-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.25);
        }

        /* ===== Features / Icon Blocks ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            text-align: center;
            padding: 36px 24px 28px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(231, 76, 60, 0.12);
        }
        .feature-card .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, rgba(231, 76, 60, 0.1), rgba(243, 156, 18, 0.1));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.08);
            background: linear-gradient(135deg, rgba(231, 76, 60, 0.18), rgba(243, 156, 18, 0.18));
        }
        .feature-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 860px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px 20px;
            }
        }

        /* ===== Event List ===== */
        .event-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .event-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-white);
            padding: 18px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: default;
        }
        .event-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(231, 76, 60, 0.12);
        }
        .event-item .event-time {
            min-width: 70px;
            text-align: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 15px;
        }
        .event-item .event-info {
            flex: 1;
        }
        .event-item .event-info h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .event-item .event-info p {
            font-size: 13px;
            color: var(--text-light);
        }
        .event-item .event-status {
            flex-shrink: 0;
        }
        @media (max-width: 640px) {
            .event-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 16px;
            }
            .event-item .event-time {
                min-width: 56px;
                font-size: 13px;
            }
            .event-item .event-info h4 {
                font-size: 14px;
            }
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 6px 20px rgba(231, 76, 60, 0.25);
        }
        .process-step h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 860px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 20px;
            }
            .process-grid::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text-primary);
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(231, 76, 60, 0.12) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            right: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(243, 156, 18, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section h2 span {
            color: var(--primary);
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #111120;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 10px;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Responsive Grid Helpers ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 860px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .grid-3 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Extra Utilities ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== Image Placeholder Style ===== */
        .img-placeholder {
            background: linear-gradient(135deg, #e8ecf1, #d5dbe3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #aab2bd;
            font-size: 36px;
            font-weight: 300;
            min-height: 160px;
            border-radius: var(--radius-sm);
        }

        /* ===== Section Intro ===== */
        .section-intro {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 40px;
        }
        .section-intro h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .section-intro h2 span {
            color: var(--primary);
        }
        .section-intro p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .section-intro .line {
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            margin: 16px auto 0;
        }
        @media (max-width: 640px) {
            .section-intro h2 {
                font-size: 24px;
            }
            .section-intro p {
                font-size: 14px;
            }
        }

        /* ===== Foundation Override ===== */
        .grid-container {
            max-width: var(--max-width);
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .cell {
            margin-bottom: 0;
        }
        .grid-x>.cell {
            padding: 0;
        }
        .grid-margin-x>.cell {
            padding: 0 12px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0f172a;
            --color-primary-light: #1e293b;
            --color-accent: #c9a84c;
            --color-accent-hover: #b8932e;
            --color-emphasis: #e53e3e;
            --color-emphasis-hover: #c53030;
            --color-bg: #f1f5f9;
            --color-card-bg: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-inverse: #f8fafc;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-accent-hover); }
        a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-primary); }

        /* ===== 容器 ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.15);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        @media (max-width: 768px) { .header-inner { padding: 0 16px; } }
        .logo-area { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
        .logo-icon {
            width: 38px; height: 38px; border-radius: 10px;
            background: linear-gradient(135deg, var(--color-accent), #d4af37);
            color: var(--color-primary);
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; font-weight: 800; letter-spacing: 0;
            box-shadow: 0 2px 8px rgba(201, 168, 76, 0.3);
        }
        .logo-text { font-size: 20px; font-weight: 700; color: var(--color-text-inverse); letter-spacing: 1px; }
        .logo-text span { color: var(--color-accent); font-weight: 300; }
        .nav-menu { display: flex; align-items: center; gap: 8px; }
        .nav-menu a {
            color: rgba(255,255,255,0.7);
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-menu a.active { color: #fff; background: rgba(255,255,255,0.12); }
        .nav-menu a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; border-radius: 4px; background: var(--color-accent); }
        .nav-menu a.nav-cta {
            background: var(--color-accent);
            color: var(--color-primary);
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(201,168,76,0.3);
            margin-left: 12px;
        }
        .nav-menu a.nav-cta:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(201,168,76,0.4); }
        .nav-menu a.nav-cta i { margin-right: 6px; }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; padding: 8px; border-radius: 8px; transition: var(--transition); }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }
        @media (max-width: 820px) {
            .nav-menu { position: fixed; top: var(--header-height); left: 0; right: 0; background: var(--color-primary); flex-direction: column; padding: 20px 24px; gap: 6px; transform: translateY(-120%); opacity: 0; pointer-events: none; transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 20px 40px rgba(0,0,0,0.3); border-top: 1px solid rgba(255,255,255,0.06); }
            .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-menu a { width: 100%; text-align: center; padding: 12px 18px; font-size: 16px; }
            .nav-menu a.active::after { display: none; }
            .nav-menu a.nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
            .nav-toggle { display: block; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: var(--color-card-bg);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
        }
        .breadcrumb-wrap .container { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 14px; color: var(--color-text-weak); }
        .breadcrumb-wrap a { color: var(--color-text-weak); }
        .breadcrumb-wrap a:hover { color: var(--color-accent); }
        .breadcrumb-wrap .sep { color: var(--color-border); margin: 0 4px; }
        .breadcrumb-wrap .current { color: var(--color-text); font-weight: 500; }

        /* ===== 文章主体 ===== */
        .article-section { padding: 48px 0 32px; }
        .article-wrapper { max-width: 860px; margin: 0 auto; }
        .article-category {
            display: inline-block;
            background: rgba(201,168,76,0.12);
            color: var(--color-accent-hover);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        @media (max-width: 768px) { .article-title { font-size: 26px; } }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            color: var(--color-text-weak);
            font-size: 14px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 28px;
        }
        .article-meta i { margin-right: 6px; color: var(--color-accent); }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--color-text);
        }
        .article-body p { margin-bottom: 1.2em; }
        .article-body h2 { font-size: 26px; margin: 1.6em 0 0.6em; color: var(--color-primary); }
        .article-body h3 { font-size: 21px; margin: 1.4em 0 0.5em; color: var(--color-primary-light); }
        .article-body img { margin: 1.5em 0; border-radius: var(--radius-md); box-shadow: var(--shadow-md); }
        .article-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: rgba(201,168,76,0.06);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-weak);
            font-style: italic;
        }
        .article-body ul, .article-body ol { margin: 1em 0; padding-left: 24px; }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body a { color: var(--color-emphasis); border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--color-emphasis); }
        .article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--color-border); }
        .article-tags .tag {
            display: inline-block;
            background: var(--color-bg);
            color: var(--color-text-weak);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--color-accent); color: #fff; }
        .article-share { display: flex; align-items: center; gap: 12px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--color-border); }
        .article-share span { font-size: 14px; color: var(--color-text-weak); font-weight: 500; }
        .article-share a {
            width: 40px; height: 40px; border-radius: 50%;
            background: var(--color-bg);
            color: var(--color-text-weak);
            display: flex; align-items: center; justify-content: center;
            font-size: 18px;
            transition: var(--transition);
        }
        .article-share a:hover { background: var(--color-accent); color: #fff; transform: translateY(-2px); }
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 56px; color: var(--color-border); margin-bottom: 16px; }
        .not-found-box h2 { font-size: 28px; margin-bottom: 12px; color: var(--color-primary); }
        .not-found-box p { color: var(--color-text-weak); margin-bottom: 20px; }
        .not-found-box .btn { display: inline-block; }

        /* ===== 相关推荐 ===== */
        .related-section { padding: 40px 0 56px; background: var(--color-card-bg); }
        .related-section .section-title { text-align: center; font-size: 28px; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
        .related-section .section-sub { text-align: center; color: var(--color-text-weak); margin-bottom: 36px; font-size: 15px; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        @media (max-width: 820px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .related-grid { grid-template-columns: 1fr; } }
        .related-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img { height: 180px; background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary)); display: flex; align-items: center; justify-content: center; color: var(--color-accent); font-size: 42px; }
        .related-card .card-body { padding: 18px 20px 22px; }
        .related-card .card-body h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; color: var(--color-primary); }
        .related-card .card-body p { font-size: 14px; color: var(--color-text-weak); line-height: 1.6; }
        .related-card .card-body .card-link { display: inline-block; margin-top: 10px; font-size: 14px; font-weight: 600; color: var(--color-accent-hover); }
        .related-card .card-body .card-link i { margin-left: 4px; font-size: 12px; transition: var(--transition); }
        .related-card .card-body .card-link:hover i { transform: translateX(4px); }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, var(--color-primary), #1a1f3a);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at 30% 50%, rgba(201,168,76,0.06), transparent 60%); pointer-events: none; }
        .cta-section h2 { font-size: 32px; font-weight: 700; color: var(--color-text-inverse); margin-bottom: 12px; position: relative; }
        .cta-section p { font-size: 17px; color: rgba(255,255,255,0.65); max-width: 560px; margin: 0 auto 28px; position: relative; }
        .cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; }
        .cta-section .btn-primary {
            display: inline-flex; align-items: center; gap: 8px;
            background: var(--color-accent);
            color: var(--color-primary);
            padding: 14px 38px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(201,168,76,0.35);
        }
        .cta-section .btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-3px); box-shadow: 0 10px 32px rgba(201,168,76,0.45); color: var(--color-primary); }
        .cta-section .btn-secondary {
            display: inline-flex; align-items: center; gap: 8px;
            background: transparent;
            color: var(--color-text-inverse);
            padding: 14px 38px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            border: 2px solid rgba(255,255,255,0.2);
            transition: var(--transition);
        }
        .cta-section .btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-3px); }

        /* ===== FAQ ===== */
        .faq-section { padding: 56px 0; background: var(--color-bg); }
        .faq-section .section-title { text-align: center; font-size: 28px; font-weight: 700; color: var(--color-primary); margin-bottom: 36px; }
        .faq-grid { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--color-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { background: rgba(201,168,76,0.04); }
        .faq-question i { color: var(--color-accent); font-size: 14px; transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--color-text-weak);
            font-size: 15px;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 0;
            border-top: 3px solid var(--color-accent);
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        @media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
        .footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 8px; color: rgba(255,255,255,0.5); }
        .footer-col h5 { font-size: 15px; font-weight: 600; color: var(--color-text-inverse); margin-bottom: 14px; letter-spacing: 0.5px; }
        .footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.55); padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--color-accent); padding-left: 4px; }
        .footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.4); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a { color: rgba(255,255,255,0.4); font-size: 20px; transition: var(--transition); }
        .footer-social a:hover { color: var(--color-accent); transform: translateY(-2px); }

        /* ===== 通用按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary { background: var(--color-accent); color: var(--color-primary); box-shadow: 0 4px 14px rgba(201,168,76,0.3); }
        .btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(201,168,76,0.4); color: var(--color-primary); }
        .btn-outline { background: transparent; color: var(--color-text); border: 2px solid var(--color-border); }
        .btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent-hover); transform: translateY(-2px); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .article-title { font-size: 32px; }
        }
        @media (max-width: 768px) {
            .article-section { padding: 28px 0 20px; }
            .article-body { font-size: 16px; line-height: 1.8; }
            .related-section .section-title { font-size: 24px; }
            .cta-section h2 { font-size: 26px; }
            .faq-section .section-title { font-size: 24px; }
        }
        @media (max-width: 520px) {
            .article-title { font-size: 22px; }
            .article-meta { gap: 8px 16px; font-size: 13px; }
            .cta-section { padding: 40px 0; }
            .cta-section h2 { font-size: 22px; }
            .cta-section .btn-primary, .cta-section .btn-secondary { padding: 12px 24px; font-size: 14px; width: 100%; justify-content: center; }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2a4a7f;
            --accent: #ffd166;
            --bg-dark: #0b1320;
            --bg-darker: #070d17;
            --bg-card: #111d2f;
            --bg-card-hover: #162438;
            --bg-light: #f8f9fa;
            --text-white: #ffffff;
            --text-light: #e0e0e0;
            --text-muted: #8899aa;
            --text-dark: #1a1a2e;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            background: var(--bg-dark);
            overflow-x: hidden;
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-white);
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(7, 13, 23, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }
        .site-header.scrolled {
            background: rgba(7, 13, 23, 0.98);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.35);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform var(--transition);
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-menu a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-menu a.active {
            color: var(--text-white);
            background: rgba(230, 57, 70, 0.15);
        }
        .nav-menu a.active::after {
            background: var(--primary);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
            transition: all var(--transition) !important;
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.45) !important;
            background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
        }
        .nav-cta i {
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 24px;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Mobile Nav ===== */
        @media screen and (max-width: 820px) {
            .nav-menu {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(7, 13, 23, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-menu a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-menu a.active {
                background: rgba(230, 57, 70, 0.2);
                border-left: 3px solid var(--primary);
            }
            .nav-cta {
                margin-top: 8px;
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media screen and (max-width: 480px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
        }

        /* ===== Hero Section ===== */
        .hero-section {
            padding: 140px 0 80px;
            background: var(--bg-darker);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.08), transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(42, 74, 127, 0.08), transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(230, 57, 70, 0.15);
            border: 1px solid rgba(230, 57, 70, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            color: var(--primary-light);
            font-weight: 500;
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 14px;
        }
        .hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-white);
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-sm);
            box-shadow: 0 6px 24px rgba(230, 57, 70, 0.35);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(230, 57, 70, 0.45);
            color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-sm);
            border: 2px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(230, 57, 70, 0.08);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .hero-stat-number span {
            color: var(--primary);
        }
        .hero-stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        @media screen and (max-width: 968px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-desc {
                font-size: 16px;
                max-width: 100%;
            }
            .hero-stats {
                padding: 24px;
            }
            .hero-stat-number {
                font-size: 26px;
            }
        }
        @media screen and (max-width: 520px) {
            .hero-section {
                padding: 110px 0 50px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                padding: 16px;
                gap: 12px;
            }
            .hero-stat-number {
                font-size: 22px;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .section-header h2 span {
            color: var(--primary);
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }
        @media screen and (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== Game Categories ===== */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .game-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .game-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transition: transform var(--transition);
        }
        .game-card:hover::before {
            transform: scaleX(1);
        }
        .game-card:hover {
            transform: translateY(-6px);
            border-color: rgba(230, 57, 70, 0.3);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .game-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: rgba(230, 57, 70, 0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            transition: all var(--transition);
        }
        .game-card:hover .game-icon {
            background: rgba(230, 57, 70, 0.22);
            transform: scale(1.08);
        }
        .game-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .game-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .game-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .game-tag.hot {
            background: rgba(230, 57, 70, 0.2);
            color: var(--primary-light);
        }

        @media screen and (max-width: 968px) {
            .game-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media screen and (max-width: 480px) {
            .game-grid {
                grid-template-columns: 1fr;
            }
            .game-card {
                padding: 20px 16px;
            }
        }

        /* ===== Featured Matches ===== */
        .match-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .match-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .match-card:hover {
            transform: translateY(-5px);
            border-color: rgba(230, 57, 70, 0.25);
            box-shadow: var(--shadow-md);
        }
        .match-top {
            padding: 20px 20px 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
        }
        .match-league {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .match-league i {
            color: var(--primary);
        }
        .match-time {
            font-size: 13px;
            color: var(--accent);
            font-weight: 500;
        }
        .match-teams {
            padding: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .match-team {
            text-align: center;
            flex: 1;
        }
        .match-team .team-icon {
            font-size: 36px;
            margin-bottom: 8px;
            color: var(--text-muted);
        }
        .match-team .team-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
        }
        .match-vs {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            flex-shrink: 0;
        }
        .match-odds {
            display: flex;
            gap: 12px;
            padding: 0 20px 20px;
        }
        .match-odds .odd-item {
            flex: 1;
            padding: 8px 12px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-sm);
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-white);
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
        }
        .match-odds .odd-item:hover {
            background: rgba(230, 57, 70, 0.15);
            border-color: rgba(230, 57, 70, 0.3);
        }
        .match-odds .odd-item .odd-label {
            font-size: 11px;
            color: var(--text-muted);
            font-weight: 400;
            display: block;
            margin-bottom: 2px;
        }

        @media screen and (max-width: 968px) {
            .match-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 520px) {
            .match-grid {
                grid-template-columns: 1fr;
            }
            .match-teams {
                flex-direction: row;
                padding: 16px;
            }
            .match-team .team-icon {
                font-size: 28px;
            }
        }

        /* ===== Betting Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
            transition: all var(--transition);
        }
        .process-step:hover {
            border-color: rgba(230, 57, 70, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.35);
        }
        .process-step .step-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .process-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media screen and (max-width: 968px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media screen and (max-width: 480px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== Data & Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(230, 57, 70, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        .stat-card .stat-value {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -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(--text-muted);
            margin-top: 6px;
        }

        @media screen and (max-width: 968px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 480px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card .stat-value {
                font-size: 30px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(230, 57, 70, 0.2);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-white);
            transition: color var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 0;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            padding: 0 24px 20px;
            max-height: 300px;
        }
        .faq-answer p {
            margin-bottom: 0;
        }

        @media screen and (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-darker), var(--secondary));
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.06), transparent 70%);
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section h2 span {
            color: var(--primary);
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media screen and (max-width: 768px) {
            .cta-section {
                padding: 50px 20px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 16px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 300px;
            line-height: 1.8;
            margin-top: 8px;
        }
        .footer-col h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 18px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        @media screen and (max-width: 868px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media screen and (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 6px 24px rgba(230, 57, 70, 0.35);
            cursor: pointer;
            transition: all var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            z-index: 999;
            border: none;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 10px 32px rgba(230, 57, 70, 0.45);
        }

        @media screen and (max-width: 520px) {
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }
        .gap-1 {
            gap: 12px;
        }
        .gap-2 {
            gap: 24px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }