/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a73e8;
            --primary-dark: #0d47a1;
            --primary-light: #4a9af5;
            --accent: #ff6b35;
            --accent-dark: #e55a2b;
            --dark: #0f0f23;
            --dark-secondary: #1a1a2e;
            --bg: #f4f6f8;
            --bg-card: #ffffff;
            --text: #2d3436;
            --text-light: #636e72;
            --text-white: #f1f1f1;
            --border: #e0e4e8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --nav-width: 250px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --gap: 32px;
        }

        /* ===== 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);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        button, input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--dark); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; width: 100%; }

        /* ===== 左侧导航 (桌面) ===== */
        .site-nav {
            position: fixed;
            top: 0; left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            padding: 0;
        }
        .site-nav .nav-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .site-nav .nav-brand .logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-nav .nav-brand .logo i { color: var(--accent); font-size: 24px; }
        .site-nav .nav-brand .logo-sub {
            font-size: 12px;
            color: rgba(255,255,255,0.5);
            margin-top: 2px;
            letter-spacing: 1px;
        }
        .nav-links {
            flex: 1;
            padding: 16px 12px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            margin: 4px 0;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .nav-links a i { width: 20px; text-align: center; font-size: 16px; }
        .nav-links a:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .nav-links a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(26,115,232,0.3); }
        .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 12px;
            color: rgba(255,255,255,0.4);
        }
        .nav-footer .hotline { margin-bottom: 6px; color: rgba(255,255,255,0.6); }
        .nav-footer .hotline i { margin-right: 6px; color: var(--accent); }

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

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0;
            height: 60px;
            background: var(--dark);
            z-index: 1100;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .mobile-header .logo-mobile {
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .logo-mobile i { color: var(--accent); }
        .mobile-header .hamburger {
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .mobile-header .hamburger:hover { background: rgba(255,255,255,0.1); }

        /* ===== 移动端遮罩 ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 1050;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .nav-overlay.show { opacity: 1; }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 75vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            padding: 80px 20px;
            text-align: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,35,0.85) 0%, rgba(26,115,232,0.6) 100%);
            z-index: 1;
        }
        .hero .hero-content { position: relative; z-index: 2; max-width: 780px; }
        .hero h1 {
            font-size: clamp(32px, 5vw, 58px);
            font-weight: 900;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: clamp(16px, 2vw, 22px);
            color: rgba(255,255,255,0.85);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero .hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero .btn-primary, .hero .btn-outline {
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(255,107,53,0.35);
        }
        .hero .btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,53,0.45); }
        .hero .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.5);
        }
        .hero .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-bg-alt { background: var(--bg-card); }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: clamp(26px, 3vw, 36px);
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }
        .section-header .badge {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 4px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }

        /* ===== 功能卡片 ===== */
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .feature-card .icon-box {
            width: 64px; height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: #fff;
        }
        .feature-card h3 { font-size: 20px; margin-bottom: 10px; }
        .feature-card p { color: var(--text-light); font-size: 15px; line-height: 1.7; }

        /* ===== 分类卡片 ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            background: var(--bg-card);
            border: 1px solid var(--border);
            cursor: pointer;
            display: block;
            color: inherit;
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); color: inherit; }
        .category-card .cat-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-card .cat-img::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 60%;
            background: linear-gradient(transparent, rgba(0,0,0,0.5));
        }
        .category-card .cat-body { padding: 20px 24px 24px; }
        .category-card .cat-body h3 { font-size: 18px; margin-bottom: 6px; }
        .category-card .cat-body p { color: var(--text-light); font-size: 14px; }
        .category-card .cat-tag {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        /* ===== 资讯/内容列表 ===== */
        .content-list { display: flex; flex-direction: column; gap: 16px; }
        .content-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .content-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow); }
        .content-item .item-num {
            width: 40px; height: 40px;
            border-radius: 50%;
            background: var(--bg);
            display: flex; align-items: center; justify-content: center;
            font-weight: 700;
            color: var(--text-light);
            font-size: 16px;
            flex-shrink: 0;
        }
        .content-item .item-info { flex: 1; min-width: 0; }
        .content-item .item-info h4 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
        .content-item .item-info h4 a { color: var(--text); }
        .content-item .item-info h4 a:hover { color: var(--primary); }
        .content-item .item-info .meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; flex-wrap: wrap; }
        .content-item .item-info .meta .tag {
            background: var(--bg);
            padding: 1px 10px;
            border-radius: 4px;
            font-size: 12px;
            color: var(--text-light);
        }
        .content-item .item-arrow { color: var(--text-light); font-size: 18px; flex-shrink: 0; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .stat-card .stat-num {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-card .stat-num span { color: var(--accent); }
        .stat-card .stat-label { font-size: 15px; color: var(--text-light); margin-top: 6px; }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-block .fb-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            min-height: 340px;
            background-size: cover;
            background-position: center;
        }
        .feature-block .fb-text h3 { font-size: 28px; margin-bottom: 16px; }
        .feature-block .fb-text p { color: var(--text-light); margin-bottom: 16px; font-size: 16px; line-height: 1.8; }
        .feature-block .fb-text ul { margin-top: 12px; }
        .feature-block .fb-text ul li {
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
        }
        .feature-block .fb-text ul li i { color: var(--accent); width: 18px; }

        /* ===== 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-sm);
            border: 1px solid var(--border);
            padding: 20px 24px;
            transition: all var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 16px;
        }
        .faq-item .faq-q i { color: var(--text-light); transition: transform var(--transition); }
        .faq-item.open .faq-q i { transform: rotate(180deg); color: var(--primary); }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-secondary) 100%);
            padding: 80px 20px;
            text-align: center;
            color: #fff;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .cta-content { position: relative; z-index: 1; max-width: 600px; margin: 0 auto; }
        .cta-section h2 { font-size: clamp(26px, 3vw, 36px); color: #fff; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); margin-bottom: 32px; font-size: 16px; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            border-radius: 50px;
            background: var(--accent);
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 24px rgba(255,107,53,0.35);
        }
        .cta-section .btn-cta:hover { background: var(--accent-dark); transform: translateY(-3px); box-shadow: 0 8px 36px rgba(255,107,53,0.5); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 20px 32px;
            font-size: 14px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .site-footer .footer-brand .logo { font-size: 20px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
        .site-footer .footer-brand .logo i { color: var(--accent); }
        .site-footer .footer-brand p { color: rgba(255,255,255,0.5); line-height: 1.7; max-width: 280px; }
        .site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 600; }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul li a { color: rgba(255,255,255,0.55); transition: color var(--transition); }
        .site-footer ul li a:hover { color: #fff; }
        .site-footer .footer-bottom {
            max-width: var(--max-width);
            margin: 36px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.35);
        }

        /* ===== 空状态 ===== */
        .empty-state { text-align: center; padding: 40px 20px; color: var(--text-light); }
        .empty-state i { font-size: 48px; color: var(--border); margin-bottom: 16px; }

        /* ===== ===== 响应式 ===== ===== */

        /* 平板 & 小桌面 (1024px以下) */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .feature-block { grid-template-columns: 1fr; gap: 32px; }
            .feature-block .fb-img { min-height: 260px; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        /* 移动端 (768px以下) */
        @media (max-width: 768px) {
            body { display: block; }
            .site-nav { transform: translateX(-100%); }
            .site-nav.open { transform: translateX(0); }
            .main-content { margin-left: 0; padding-top: 60px; }
            .mobile-header { display: flex; }
            .nav-overlay.show { display: block; }

            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }

            .hero { min-height: 60vh; padding: 60px 20px; }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 15px; }

            .section { padding: 48px 0; }
            .section-header { margin-bottom: 32px; }

            .content-item { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px; }
            .content-item .item-num { width: 32px; height: 32px; font-size: 14px; }

            .feature-card { padding: 28px 20px; }

            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }

            .cta-section { padding: 56px 20px; }

            .stat-card { padding: 24px 12px; }
        }

        /* 小手机 (480px以下) */
        @media (max-width: 480px) {
            .hero .hero-btns { flex-direction: column; align-items: center; }
            .hero .btn-primary, .hero .btn-outline { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .container { padding: 0 16px; }
            .section { padding: 36px 0; }
            .category-card .cat-img { height: 150px; }
        }

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

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-footer: #0f0f1a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border-light: #e9ecef;
            --border-medium: #dee2e6;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --nav-width: 240px;
            --header-height: 0px;
            --content-max: 860px;
            --section-gap: 56px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

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

        /* ===== 左侧导航 ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            padding: 28px 20px 20px;
            z-index: 1000;
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

        .nav-brand {
            margin-bottom: 36px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }

        .logo-sub {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
            padding-left: 36px;
            letter-spacing: 2px;
        }

        .nav-links {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-links a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
        }
        .nav-links a:hover i {
            color: var(--primary-light);
        }
        .nav-links a.active {
            background: rgba(230, 57, 70, 0.15);
            color: var(--primary-light);
            border-color: rgba(230, 57, 70, 0.2);
        }
        .nav-links a.active i {
            color: var(--primary);
        }

        .nav-footer {
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.8;
        }
        .nav-footer .hotline {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 4px;
        }
        .nav-footer .hotline i {
            color: var(--primary);
            margin-right: 6px;
        }

        /* ===== 移动端导航切换 ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--bg-dark);
            color: var(--text-white);
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--secondary);
        }

        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

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

        /* ===== 文章详情 ===== */
        .article-page {
            flex: 1;
            padding: 48px 40px 60px;
            max-width: var(--content-max);
            width: 100%;
            margin: 0 auto;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--text-light);
        }
        .article-breadcrumb a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .sep {
            color: var(--border-medium);
        }
        .article-breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 14px;
            color: var(--text-light);
            align-items: center;
        }
        .article-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .article-meta .category-tag {
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        .article-cover {
            margin-bottom: 32px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 600;
            color: var(--text-primary);
        }
        .article-body h2 {
            font-size: 22px;
        }
        .article-body h3 {
            font-size: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.5em;
        }
        .article-body ul {
            list-style: disc;
        }
        .article-body ol {
            list-style: decimal;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230, 57, 70, 0.05);
            padding: 16px 20px;
            margin: 1.2em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body img {
            margin: 1.2em 0;
            border-radius: var(--radius-sm);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2em 0;
        }
        .article-body th,
        .article-body td {
            padding: 10px 14px;
            border: 1px solid var(--border-light);
            text-align: left;
        }
        .article-body th {
            background: var(--bg-dark);
            color: var(--text-white);
            font-weight: 600;
        }
        .article-body tr:nth-child(even) {
            background: rgba(0, 0, 0, 0.02);
        }

        /* ===== 文章底部导航 ===== */
        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
            gap: 12px;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border: 1px solid var(--border-medium);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .article-footer-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }
        .article-footer-nav .back-home {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .article-footer-nav .back-home:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }

        /* ===== 404 状态 ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 28px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-not-found a {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 500;
        }
        .article-not-found a:hover {
            background: var(--primary-dark);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 40px 28px;
            margin-left: var(--nav-width);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }
        .footer-grid h4 {
            color: var(--text-white);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-grid ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-grid ul li i {
            width: 18px;
            color: var(--primary);
            margin-right: 6px;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 32px;
            margin-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-page {
                padding: 36px 28px 48px;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }

            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .site-nav {
                transform: translateX(-100%);
                width: 260px;
            }
            .site-nav.open {
                transform: translateX(0);
            }
            .nav-overlay.open {
                display: block;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 70px;
            }

            .article-page {
                padding: 24px 18px 40px;
            }
            .article-header h1 {
                font-size: 22px;
            }
            .article-meta {
                gap: 10px 16px;
                font-size: 13px;
            }

            .site-footer {
                margin-left: 0;
                padding: 32px 18px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }

            .article-footer-nav {
                flex-direction: column;
                align-items: stretch;
            }
            .article-footer-nav a {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 18px;
            }
            .article-body {
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 18px;
            }
            .article-body h3 {
                font-size: 16px;
            }
            .article-page {
                padding: 16px 12px 32px;
            }
            .article-breadcrumb {
                font-size: 12px;
            }
            .footer-grid h4 {
                font-size: 14px;
            }
        }

        /* ===== 滚动条美化 ===== */
        .site-nav::-webkit-scrollbar {
            width: 4px;
        }
        .site-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .site-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        .site-nav::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== 打印 ===== */
        @media print {
            .site-nav,
            .nav-toggle,
            .nav-overlay,
            .site-footer {
                display: none !important;
            }
            .main-wrapper {
                margin-left: 0 !important;
            }
            .article-page {
                padding: 0 !important;
                max-width: 100% !important;
            }
            .article-footer-nav {
                display: none !important;
            }
            body {
                background: #fff !important;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1a1a2e;
            --secondary-light: #2a2a4a;
            --accent: #fca311;
            --bg-body: #f5f6fa;
            --bg-card: #ffffff;
            --bg-dark: #0d0d1a;
            --bg-section: #f0f2f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e8e8f0;
            --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 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --shadow-hover: 0 16px 48px rgba(230, 57, 70, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --nav-width: 260px;
            --header-height: 70px;
            --max-width: 1200px;
        }

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

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

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

        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }

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

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

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

        /* ===== Left Side Navigation ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            scrollbar-width: thin;
            scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
        }
        .site-nav::-webkit-scrollbar {
            width: 4px;
        }
        .site-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .site-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
        }

        .nav-brand {
            padding: 32px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .nav-brand .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }
        .nav-brand .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .nav-brand .logo-sub {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 4px;
            padding-left: 36px;
            letter-spacing: 1px;
            font-weight: 300;
        }

        .nav-links {
            flex: 1;
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .nav-links a:hover i {
            color: var(--primary-light);
        }
        .nav-links a.active {
            background: rgba(230, 57, 70, 0.18);
            color: #fff;
            font-weight: 600;
        }
        .nav-links a.active i {
            color: var(--primary);
        }
        .nav-links a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 28px;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
        }

        .nav-footer {
            padding: 20px 24px 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .nav-footer .hotline {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.8rem;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-footer .hotline i {
            color: var(--accent);
        }

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 14px;
            z-index: 1100;
            background: var(--bg-dark);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--secondary-light);
        }

        /* ===== Mobile Nav Overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 100px 0 90px;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: var(--text-white);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 13, 26, 0.85) 30%, rgba(230, 57, 70, 0.55) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 i {
            color: var(--primary);
            margin-right: 10px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }
        .hero-badges span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-badges span i {
            color: var(--accent);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(230, 57, 70, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--bg-dark);
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: #e09b00;
            border-color: #e09b00;
            color: var(--bg-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(252, 163, 17, 0.35);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.85rem;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2rem;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            margin: 14px auto 0;
        }
        .section-header p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 16px auto 0;
            font-size: 1.05rem;
        }
        .section-bg-alt {
            background: var(--bg-section);
        }
        .section-bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-bg-dark .section-header h2,
        .section-bg-dark .section-header p {
            color: #fff;
        }
        .section-bg-dark .section-header h2::after {
            background: var(--accent);
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            flex: 1;
        }
        .card-body .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .card-tag {
            display: inline-block;
            background: rgba(230, 57, 70, 0.10);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 50px;
            letter-spacing: 0.3px;
        }
        .card-tag-accent {
            background: rgba(252, 163, 17, 0.15);
            color: var(--accent);
        }
        .card-tag-green {
            background: rgba(46, 204, 113, 0.12);
            color: #27ae60;
        }

        /* ===== Sports Category Cards (vertial cover) ===== */
        .sport-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            text-align: center;
            cursor: pointer;
        }
        .sport-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .sport-card .sport-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .sport-card .sport-info {
            padding: 20px 16px 24px;
        }
        .sport-card .sport-info h3 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .sport-card .sport-info p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 12px;
        }
        .sport-card .sport-info .sport-count {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .sport-card .sport-info .sport-count i {
            color: var(--primary);
        }

        /* ===== Event List ===== */
        .event-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .event-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            gap: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .event-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
            border-color: transparent;
        }
        .event-date {
            text-align: center;
            min-width: 70px;
            padding: 10px 8px;
            background: var(--bg-section);
            border-radius: var(--radius-sm);
        }
        .event-date .day {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .event-date .month {
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .event-detail {
            flex: 1;
        }
        .event-detail h3 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .event-detail p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .event-detail p i {
            color: var(--text-light);
            width: 16px;
        }
        .event-status {
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            white-space: nowrap;
        }
        .event-status.ongoing {
            background: rgba(46, 204, 113, 0.12);
            color: #27ae60;
        }
        .event-status.upcoming {
            background: rgba(252, 163, 17, 0.12);
            color: #d48c00;
        }
        .event-status.ended {
            background: rgba(142, 142, 172, 0.12);
            color: #6e6e8a;
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-number .plus {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            margin-top: 6px;
        }
        .stat-item i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.25;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-item .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.25);
        }
        .step-item .step-num.accent {
            background: var(--accent);
            box-shadow: 0 6px 20px rgba(252, 163, 17, 0.25);
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-item p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(230, 57, 70, 0.2);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 80px 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(13, 13, 26, 0.78);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            max-width: 540px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
            font-size: 0.88rem;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-grid ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }
        .footer-grid ul li i {
            width: 18px;
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 24px;
            margin-top: 48px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                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: repeat(2, 1fr);
            }
        }

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

            .nav-toggle {
                display: flex;
            }

            .site-nav {
                transform: translateX(-100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                width: 280px;
            }
            .site-nav.open {
                transform: translateX(0);
            }

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

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

            .page-hero {
                padding: 80px 0 70px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .event-item {
                flex-direction: column;
                align-items: flex-start;
                padding: 18px 20px;
            }
            .event-date {
                display: flex;
                align-items: center;
                gap: 10px;
                min-width: auto;
                padding: 6px 14px;
            }
            .event-date .day {
                font-size: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-badges {
                gap: 8px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 16px;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.9rem;
            }
            .faq-answer.open {
                padding: 0 18px 16px;
            }
        }

        /* ===== Utility Animations ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .delay-1 {
            transition-delay: 0.1s;
        }
        .delay-2 {
            transition-delay: 0.2s;
        }
        .delay-3 {
            transition-delay: 0.3s;
        }
        .delay-4 {
            transition-delay: 0.4s;
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b7a;
            --secondary: #1d3557;
            --secondary-light: #2b4d7a;
            --accent: #f4a261;
            --accent-light: #ffb87a;
            --bg-body: #f8f9fa;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-main: #222222;
            --text-light: #555555;
            --text-lighter: #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 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-hover: 0 12px 36px rgba(230, 57, 70, 0.18);
            --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;
            --nav-width: 240px;
            --header-height: 0px;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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(--text-main);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

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

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Left Nav System ===== */
        .site-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        .site-nav {
            width: var(--nav-width);
            min-height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1000;
            padding: 28px 0 20px;
            box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
            overflow-y: auto;
        }

        .nav-brand {
            padding: 0 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 16px;
        }

        .nav-brand .logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-brand .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .nav-brand .logo-sub {
            font-size: 12px;
            color: var(--text-lighter);
            margin-top: 4px;
            padding-left: 36px;
            letter-spacing: 1px;
        }

        .nav-links {
            flex: 1;
            padding: 8px 12px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            color: rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 4px;
        }
        .nav-links a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }

        .nav-footer {
            padding: 20px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.8;
        }
        .nav-footer .hotline {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 6px;
            font-size: 13px;
        }
        .nav-footer .hotline i {
            color: var(--accent);
        }

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

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--primary-dark);
        }

        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .nav-overlay.show {
            opacity: 1;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(26, 26, 46, 0.85), rgba(26, 26, 46, 0.7)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 40px 70px;
            text-align: center;
            color: var(--text-white);
        }
        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .page-banner h1 i {
            color: var(--primary);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .page-banner .breadcrumb {
            margin-top: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb span {
            color: var(--primary-light);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 70px 40px;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .section-title h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-title p {
            color: var(--text-light);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }
        .section-title .title-bar {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
        }
        .card-body p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .card-body .tag {
            display: inline-block;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--text-lighter);
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }
        .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }
        .card-body .card-link:hover {
            gap: 10px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
        }
        .badge-hot {
            background: #ff6b35;
        }
        .badge-new {
            background: #2ec4b6;
        }
        .badge-sale {
            background: #ffbf69;
            color: var(--text-main);
        }

        /* ===== Feature / Data Block ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-item .icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .feature-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 6px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-light);
        }

        /* ===== Program / Plan List ===== */
        .plan-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .plan-item {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .plan-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .plan-item .plan-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(230, 57, 70, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .plan-item .plan-info {
            flex: 1;
        }
        .plan-item .plan-info h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 4px;
        }
        .plan-item .plan-info p {
            color: var(--text-light);
            font-size: 14px;
        }
        .plan-item .plan-meta {
            text-align: right;
            flex-shrink: 0;
        }
        .plan-item .plan-meta .level {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(46, 196, 182, 0.12);
            color: #1a936f;
        }
        .plan-item .plan-meta .level.adv {
            background: rgba(230, 57, 70, 0.10);
            color: var(--primary);
        }
        .plan-item .plan-meta .duration {
            display: block;
            margin-top: 6px;
            font-size: 13px;
            color: var(--text-lighter);
        }

        /* ===== Trainer Cards ===== */
        .trainer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .trainer-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .trainer-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .trainer-card .trainer-img {
            width: 100%;
            aspect-ratio: 1/1;
            object-fit: cover;
            display: block;
        }
        .trainer-card .trainer-body {
            padding: 20px 20px 24px;
        }
        .trainer-card .trainer-body h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
        }
        .trainer-card .trainer-body .title {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            margin: 4px 0 8px;
        }
        .trainer-card .trainer-body p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
        }
        .trainer-card .trainer-body .social {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 12px;
        }
        .trainer-card .trainer-body .social a {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(230, 57, 70, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
            transition: var(--transition);
        }
        .trainer-card .trainer-body .social a:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Testimonial ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
        }
        .testimonial-card .stars {
            color: #f4a261;
            font-size: 14px;
            margin-bottom: 12px;
        }
        .testimonial-card blockquote {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.8;
            font-style: italic;
            margin-bottom: 16px;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .author img {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            object-fit: cover;
        }
        .testimonial-card .author .name {
            font-weight: 600;
            color: var(--secondary);
            font-size: 15px;
        }
        .testimonial-card .author .meta {
            font-size: 13px;
            color: var(--text-lighter);
        }

        /* ===== 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-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--primary);
            font-size: 14px;
            transition: var(--transition);
        }
        .faq-item[open] summary i {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(26, 26, 46, 0.9), rgba(26, 26, 46, 0.7)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            padding: 70px 40px;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section h2 i {
            color: var(--primary);
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--secondary);
        }
        .btn-white:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 40px 30px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .footer-brand .logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-grid ul li a:hover {
            color: var(--primary-light);
        }
        .footer-grid ul li i {
            width: 20px;
            color: var(--primary);
        }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 40px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trainer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section {
                padding: 50px 24px;
            }
            .cta-section {
                padding: 50px 24px;
            }
            .site-footer {
                padding: 40px 24px 24px;
            }
        }

        @media (max-width: 768px) {
            .site-nav {
                transform: translateX(-100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .site-nav.open {
                transform: translateX(0);
            }
            .nav-toggle {
                display: flex;
            }
            .nav-overlay {
                display: block;
                pointer-events: none;
            }
            .nav-overlay.show {
                pointer-events: auto;
            }
            .main-content {
                margin-left: 0;
            }
            .page-banner {
                padding: 60px 20px 50px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .section {
                padding: 40px 16px;
            }
            .section-title h2 {
                font-size: 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-item {
                padding: 24px 16px;
            }
            .trainer-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .plan-item {
                flex-direction: column;
                text-align: center;
                padding: 20px;
            }
            .plan-item .plan-meta {
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner {
                padding: 40px 16px 36px;
            }
            .section-title h2 {
                font-size: 20px;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .plan-item .plan-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }
        }

        /* ===== Print ===== */
        @media print {
            .site-nav {
                display: none;
            }
            .nav-toggle {
                display: none;
            }
            .nav-overlay {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .cta-section {
                background: #1a1a2e !important;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
            }
            .page-banner {
                background: #1a1a2e !important;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
            }
        }

/* roulang page: category3 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #E63946;
            --primary-dark: #C1121F;
            --primary-light: #FF6B6B;
            --secondary: #1D3557;
            --secondary-light: #2B4C7A;
            --accent: #F4A261;
            --bg-dark: #1A1A2E;
            --bg-dark-alt: #16213E;
            --bg-body: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-section-alt: #EDF2F7;
            --text-primary: #1A1A2E;
            --text-body: #333333;
            --text-muted: #6B7280;
            --text-light: #9CA3AF;
            --text-white: #FFFFFF;
            --border-color: #E5E7EB;
            --border-light: #F3F4F6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --nav-width: 260px;
            --header-height: 0px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ========== 左侧导航 ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition);
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }

        .site-nav::-webkit-scrollbar {
            width: 4px;
        }
        .site-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .site-nav::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }

        .nav-brand {
            padding: 32px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .nav-brand .logo i {
            font-size: 28px;
            color: var(--primary);
        }
        .logo-sub {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 6px;
            padding-left: 38px;
            letter-spacing: 1px;
        }

        .nav-links {
            flex: 1;
            padding: 20px 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a i {
            width: 22px;
            font-size: 18px;
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
        }
        .nav-links a:hover i {
            color: var(--primary-light);
        }
        .nav-links a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 20px rgba(230, 57, 70, 0.35);
        }
        .nav-links a.active i {
            color: var(--text-white);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 32px;
            background: var(--primary);
            border-radius: 4px 0 0 4px;
        }

        .nav-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-light);
        }
        .nav-footer .hotline {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
            color: rgba(255, 255, 255, 0.8);
            font-weight: 500;
        }
        .nav-footer .hotline i {
            color: var(--accent);
        }

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

        /* ========== 移动端顶部栏 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-dark);
            z-index: 999;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-header .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 18px;
        }
        .mobile-header .logo i {
            color: var(--primary);
            font-size: 22px;
        }
        .mobile-menu-btn {
            color: var(--text-white);
            font-size: 24px;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-menu-btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ========== Hero 横幅 ========== */
        .hero-store {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.85) 0%, rgba(22, 33, 62, 0.75) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 80px 40px 60px;
            overflow: hidden;
        }
        .hero-store::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            z-index: 1;
        }
        .hero-store * {
            position: relative;
            z-index: 2;
        }
        .hero-store .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            padding: 8px 20px;
            border-radius: 50px;
            color: var(--text-white);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-store .hero-badge i {
            color: var(--accent);
        }
        .hero-store h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-store h1 span {
            color: var(--primary);
        }
        .hero-store .hero-sub {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            font-weight: 400;
            line-height: 1.6;
        }
        .hero-store .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-store .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--text-white);
            font-size: 17px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.35);
        }
        .hero-store .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(230, 57, 70, 0.45);
            color: var(--text-white);
        }
        .hero-store .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            color: var(--text-white);
            font-size: 17px;
            font-weight: 600;
            transition: all var(--transition);
            background: transparent;
        }
        .hero-store .btn-outline:hover {
            border-color: var(--text-white);
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 80px 40px;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header .section-sub {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-dark .section-header .section-sub {
            color: rgba(255, 255, 255, 0.65);
        }
        .section-header .section-line {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ========== 商品分类标签 ========== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 48px;
        }
        .category-tabs .tab {
            padding: 10px 28px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            cursor: pointer;
            box-shadow: var(--shadow-sm);
        }
        .category-tabs .tab:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.12);
            transform: translateY(-2px);
        }
        .category-tabs .tab.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.25);
        }
        .category-tabs .tab:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ========== 商品卡片网格 ========== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .product-card .card-img {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--bg-section-alt);
        }
        .product-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .card-img img {
            transform: scale(1.06);
        }
        .product-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: var(--text-white);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.5px;
        }
        .product-card .card-badge.hot {
            background: #FF6B35;
        }
        .product-card .card-badge.new {
            background: var(--secondary);
        }
        .product-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .product-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .product-card .card-body .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 12px;
            flex: 1;
        }
        .product-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .product-card .card-price {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
        }
        .product-card .card-price .unit {
            font-size: 14px;
            font-weight: 500;
        }
        .product-card .card-price .original {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-light);
            text-decoration: line-through;
            margin-left: 8px;
        }
        .product-card .card-sales {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .product-card .card-sales i {
            color: var(--accent);
        }
        .product-card .card-footer {
            padding: 0 22px 20px;
        }
        .product-card .btn-add {
            width: 100%;
            padding: 12px 20px;
            border-radius: var(--radius-md);
            background: var(--secondary);
            color: var(--text-white);
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all var(--transition);
        }
        .product-card .btn-add:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(29, 53, 87, 0.25);
        }
        .product-card .btn-add:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ========== 品牌专区 ========== */
        .brand-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .brand-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .brand-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }
        .brand-item .brand-icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .brand-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .brand-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ========== 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: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-item .faq-q:hover {
            background: rgba(230, 57, 70, 0.03);
        }
        .faq-item .faq-q i {
            color: var(--primary);
            font-size: 18px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 200px;
            padding: 0 24px 20px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
            padding: 80px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.12) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-section * {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 18px 44px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--text-white);
            font-size: 18px;
            font-weight: 700;
            transition: all var(--transition);
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.35);
        }
        .cta-section .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 16px 48px rgba(230, 57, 70, 0.45);
            color: var(--text-white);
        }
        .cta-section .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 18px 44px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: var(--text-white);
            font-size: 18px;
            font-weight: 600;
            transition: all var(--transition);
            background: transparent;
        }
        .cta-section .btn-cta-outline:hover {
            border-color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-3px);
            color: var(--text-white);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 40px 0;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer h4 {
            color: var(--text-white);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer ul li a:hover {
            color: var(--text-white);
        }
        .site-footer ul li i {
            color: var(--primary-light);
            width: 18px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            max-width: var(--container-max);
            margin: 0 auto;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom span {
            margin: 4px 0;
        }

        /* ========== 移动端导航覆盖 ========== */
        .site-nav.open {
            transform: translateX(0);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.active {
            display: block;
        }

        /* ========== 响应式设计 ========== */
        @media (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .brand-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero-store h1 {
                font-size: 38px;
            }
            .section {
                padding: 60px 24px;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .site-nav {
                transform: translateX(-100%);
                width: 280px;
                border-right: none;
                border-radius: 0 12px 12px 0;
                box-shadow: 0 0 60px rgba(0, 0, 0, 0.4);
            }
            .site-nav.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .nav-links a.active::after {
                display: none;
            }
            .hero-store {
                min-height: 340px;
                padding: 60px 24px 50px;
            }
            .hero-store h1 {
                font-size: 30px;
            }
            .hero-store .hero-sub {
                font-size: 17px;
            }
            .hero-store .btn-primary,
            .hero-store .btn-outline {
                padding: 14px 28px;
                font-size: 15px;
            }
            .section {
                padding: 48px 20px;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header .section-sub {
                font-size: 15px;
            }
            .product-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .product-card .card-body {
                padding: 14px 16px 18px;
            }
            .product-card .card-body h3 {
                font-size: 16px;
            }
            .product-card .card-price {
                font-size: 18px;
            }
            .category-tabs .tab {
                padding: 8px 20px;
                font-size: 14px;
            }
            .brand-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .brand-item {
                padding: 24px 16px;
            }
            .faq-item .faq-q {
                padding: 14px 18px;
                font-size: 15px;
            }
            .cta-section {
                padding: 56px 24px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .btn-cta,
            .cta-section .btn-cta-outline {
                padding: 14px 32px;
                font-size: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer {
                padding: 40px 20px 0;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .hero-store .hero-actions {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .product-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .brand-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .hero-store h1 {
                font-size: 26px;
            }
            .hero-store .hero-sub {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .category-tabs {
                gap: 8px;
            }
            .category-tabs .tab {
                padding: 6px 16px;
                font-size: 13px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 40px 16px;
            }
        }

        @media (min-width: 769px) {
            .site-nav {
                transform: translateX(0) !important;
            }
            .nav-overlay {
                display: none !important;
            }
            .mobile-header {
                display: none !important;
            }
        }

        /* ========== 工具类 ========== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }