/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a3f64;
            --primary-dark: #091d33;
            --accent: #e05a2c;
            --accent-hover: #c94d22;
            --accent-light: #fdf0ea;
            --bg: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #0f2b4a;
            --text: #1a1a2e;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #f1f3f5;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --nav-width: 260px;
            --header-height: 70px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --gap: 24px;
        }

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

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

        /* ===== 页面布局（左侧导航 + 右侧内容） ===== */
        .page-wrapper { display: flex; min-height: 100vh; }

        /* ===== 左侧导航 ===== */
        .nav-side {
            width: var(--nav-width);
            background: var(--bg-white);
            border-right: 1px solid var(--border);
            position: fixed; top: 0; left: 0; bottom: 0;
            z-index: 1000;
            display: flex; flex-direction: column;
            padding: 28px 20px 20px;
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .nav-side .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            display: flex; align-items: center; gap: 10px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 24px;
            letter-spacing: -0.3px;
        }
        .nav-side .logo i { color: var(--accent); font-size: 1.6rem; }
        .nav-side .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-side .nav-links { display: flex; flex-direction: column; gap: 4px; flex: 1; }
        .nav-side .nav-links a {
            display: flex; align-items: center; gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .nav-side .nav-links a i { width: 20px; text-align: center; font-size: 1.05rem; }
        .nav-side .nav-links a:hover { background: var(--accent-light); color: var(--accent); }
        .nav-side .nav-links a.active { background: var(--accent-light); color: var(--accent); font-weight: 600; }
        .nav-side .nav-footer {
            margin-top: auto;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-light);
            text-align: center;
        }
        .nav-side .nav-footer p { margin-bottom: 4px; }

        /* ===== 右侧内容区 ===== */
        .content-main {
            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: sticky; top: 0; z-index: 999;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 0 var(--gap);
            height: var(--header-height);
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .mobile-header .logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex; align-items: center; gap: 8px;
        }
        .mobile-header .logo i { color: var(--accent); }
        .mobile-header .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .mobile-header .menu-toggle {
            width: 42px; height: 42px;
            display: flex; align-items: center; justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--bg);
            color: var(--text);
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .mobile-header .menu-toggle:hover { background: var(--accent-light); color: var(--accent); }

        /* ===== 移动端遮罩 ===== */
        .nav-overlay {
            display: none;
            position: fixed; top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.45);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.open { display: block; }

        /* ===== 导航响应式 ===== */
        @media (max-width: 820px) {
            .nav-side { transform: translateX(-100%); }
            .nav-side.open { transform: translateX(0); }
            .mobile-header { display: flex; }
            .content-main { margin-left: 0; }
            .page-wrapper { flex-direction: column; }
        }
        @media (min-width: 821px) {
            .nav-overlay { display: none !important; }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex; align-items: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,43,74,0.88) 0%, rgba(15,43,74,0.60) 70%, rgba(224,90,44,0.25) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; padding: 80px var(--gap); }
        .hero-content { max-width: 700px; }
        .hero-content .badge {
            display: inline-flex; align-items: center; gap: 6px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            color: var(--text-white);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.10);
        }
        .hero-content .badge i { color: var(--accent); }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-content h1 .highlight { color: var(--accent); }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.80);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(224,90,44,0.35);
        }
        .hero-actions .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(224,90,44,0.40); }
        .hero-actions .btn-outline {
            display: inline-flex; align-items: center; gap: 10px;
            background: transparent;
            color: #fff;
            padding: 14px 28px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.25);
            transition: var(--transition);
        }
        .hero-actions .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.50); }

        @media (max-width: 768px) {
            .hero { min-height: 460px; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content p { font-size: 1rem; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
        }
        @media (max-width: 480px) {
            .hero-content h1 { font-size: 1.6rem; }
            .hero .container { padding: 60px var(--gap); }
        }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-bg { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark .section-title,
        .section-dark .section-subtitle { color: #fff; }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 600px;
            margin-bottom: 48px;
        }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.70); }
        .section-header { text-align: center; margin-bottom: 16px; }
        .section-header .section-subtitle { margin-left: auto; margin-right: auto; }

        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { font-size: 1.5rem; }
            .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
        }

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

        @media (max-width: 992px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .grid-3 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 640px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-icon {
            width: 52px; height: 52px;
            border-radius: var(--radius-sm);
            background: var(--accent-light);
            color: var(--accent);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.7; }

        /* ===== 特色卡片（带图片） ===== */
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-card .card-img {
            width: 100%; height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .feature-card .card-body { padding: 20px 22px 24px; }
        .feature-card .card-body h3 { font-size: 1.1rem; margin-bottom: 6px; }
        .feature-card .card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }
        .feature-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            padding: 3px 12px;
            border-radius: 100px;
            margin-bottom: 10px;
        }

        /* ===== 统计块 ===== */
        .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); text-align: center; }
        .stat-item .stat-number { font-size: 2.6rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
        .stat-item .stat-label { font-size: 0.95rem; color: var(--text-light); margin-top: 4px; }
        .section-dark .stat-item .stat-label { color: rgba(255,255,255,0.70); }

        @media (max-width: 768px) {
            .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item .stat-number { font-size: 2rem; }
        }
        @media (max-width: 480px) {
            .stat-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== 内容列表（CMS） ===== */
        .post-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
        .post-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex; flex-direction: column;
        }
        .post-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .post-item .post-meta {
            display: flex; align-items: center; gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .post-item .post-meta .cat {
            background: var(--accent-light);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.7rem;
        }
        .post-item h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .post-item h3 a { color: var(--text); }
        .post-item h3 a:hover { color: var(--accent); }
        .post-item p { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; flex: 1; }
        .post-item .post-footer {
            margin-top: 14px;
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex; align-items: center; gap: 8px;
        }
        .post-item .post-footer a { color: var(--accent); font-weight: 500; }
        .post-item .post-footer a:hover { text-decoration: underline; }

        .empty-list { text-align: center; padding: 60px 20px; color: var(--text-light); font-size: 1rem; grid-column: 1 / -1; }
        .empty-list i { font-size: 2.4rem; color: var(--border); margin-bottom: 12px; display: block; }

        @media (max-width: 768px) {
            .post-list { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text);
        }
        .faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.9rem; }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,43,74,0.92) 0%, rgba(15,43,74,0.70) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; padding: 80px var(--gap); }
        .cta-section h2 { font-size: 2rem; color: #fff; margin-bottom: 16px; }
        .cta-section p { font-size: 1.05rem; color: rgba(255,255,255,0.80); max-width: 560px; margin: 0 auto 32px; }
        .cta-section .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 16px 40px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 4px 24px rgba(224,90,44,0.35);
        }
        .cta-section .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 36px rgba(224,90,44,0.45); }

        @media (max-width: 768px) {
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-section .btn-primary { padding: 14px 32px; font-size: 0.95rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.70);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .site-footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
        .site-footer .footer-brand .logo { font-size: 1.2rem; 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 { font-size: 0.88rem; line-height: 1.8; max-width: 360px; }
        .site-footer h4 { font-size: 0.95rem; color: #fff; margin-bottom: 16px; font-weight: 600; }
        .site-footer ul { display: flex; flex-direction: column; gap: 8px; }
        .site-footer ul a { font-size: 0.88rem; color: rgba(255,255,255,0.60); transition: var(--transition); }
        .site-footer ul a:hover { color: var(--accent); }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.82rem;
            text-align: center;
            color: rgba(255,255,255,0.45);
        }

        @media (max-width: 768px) {
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .site-footer .footer-brand p { max-width: 100%; }
        }

        /* ===== 通用按钮 ===== */
        .btn-link { color: var(--accent); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; font-size: 0.92rem; }
        .btn-link:hover { color: var(--accent-hover); gap: 10px; }

        /* ===== 分隔线 ===== */
        .divider { width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin: 0 auto 16px; }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .gap-16 { gap: 16px; }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* ===== 选中高亮 ===== */
        ::selection { background: var(--accent); color: #fff; }

        /* ===== 打印 ===== */
        @media print {
            .nav-side, .mobile-header, .nav-overlay { display: none !important; }
            .content-main { margin-left: 0 !important; }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1faee;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f77f00;
            --accent-light: #fcbf49;
            --bg-body: #f9f9fb;
            --bg-card: #ffffff;
            --bg-dark: #1d3557;
            --bg-section-alt: #f0f4f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-light: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f0f0f5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --sidebar-width: 240px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --gap: 30px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--secondary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); font-weight: 700; }
        h1 { font-size: 2.4rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; }

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

        /* ===== Layout: Sidebar + Main ===== */
        .site-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ===== Sidebar Navigation ===== */
        .nav-side {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            padding: 28px 20px;
            box-shadow: 2px 0 20px rgba(0,0,0,0.03);
            transition: transform var(--transition);
        }
        .nav-side .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 36px;
            padding: 0 8px;
            letter-spacing: -0.01em;
        }
        .nav-side .logo i { font-size: 1.6rem; color: var(--primary); }
        .nav-side .logo span { color: var(--text-primary); }
        .nav-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            text-decoration: none;
        }
        .nav-links a i { width: 20px; text-align: center; font-size: 1.1rem; color: var(--text-muted); transition: var(--transition); }
        .nav-links a:hover { background: var(--primary-light); color: var(--primary); }
        .nav-links a:hover i { color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.25);
        }
        .nav-links a.active i { color: #fff; }
        .nav-footer {
            margin-top: auto;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
            line-height: 1.6;
        }
        .nav-footer p:last-child { margin-bottom: 0; }

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

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 80px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(29, 53, 87, 0.92) 0%, rgba(230, 57, 70, 0.70) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb span { color: rgba(255,255,255,0.5); }
        .article-banner h1 {
            font-size: 2.6rem;
            color: #fff;
            max-width: 900px;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .article-meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 30px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
        }
        .article-meta-info i { margin-right: 6px; color: var(--accent-light); }
        .article-meta-info span { display: inline-flex; align-items: center; }

        /* ===== Article Body ===== */
        .article-section {
            padding: 50px 0 70px;
            background: var(--bg-body);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .article-content p { margin-bottom: 1.4em; }
        .article-body .article-content h2, 
        .article-body .article-content h3 { margin-top: 1.6em; margin-bottom: 0.6em; }
        .article-body .article-content img { margin: 1.2em 0; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .article-body .article-content ul, 
        .article-body .article-content ol { margin: 1em 0; padding-left: 1.5em; list-style: disc; }
        .article-body .article-content ol { list-style: decimal; }
        .article-body .article-content li { margin-bottom: 0.4em; }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.2em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-body .article-content a { color: var(--primary); text-decoration: underline; }
        .article-body .article-content a:hover { color: var(--primary-dark); }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 20px; }
        .article-not-found .btn-back { 
            display: inline-block; 
            padding: 12px 32px; 
            background: var(--primary); 
            color: #fff; 
            border-radius: var(--radius-md); 
            font-weight: 600; 
        }
        .article-not-found .btn-back:hover { background: var(--primary-dark); color: #fff; }

        /* ===== Sidebar (Article Page) ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i { color: var(--primary); }
        .sidebar-card ul li { margin-bottom: 10px; }
        .sidebar-card ul li a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 0;
        }
        .sidebar-card ul li a:hover { color: var(--primary); }
        .sidebar-card ul li a i { font-size: 0.7rem; color: var(--text-muted); }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--secondary), #0f2a44);
            color: var(--text-light);
            border: none;
        }
        .sidebar-cta h4 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
        .sidebar-cta h4 i { color: var(--accent-light); }
        .sidebar-cta p { font-size: 0.9rem; color: rgba(255,255,255,0.85); margin-bottom: 16px; }
        .sidebar-cta .btn-cta {
            display: inline-block;
            padding: 10px 24px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            text-align: center;
            width: 100%;
        }
        .sidebar-cta .btn-cta:hover { background: var(--accent-light); color: var(--text-primary); }

        /* ===== Related Section ===== */
        .related-section {
            padding: 50px 0;
            background: var(--bg-section-alt);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 1.8rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .related-card .card-body { padding: 18px 20px 22px; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
        .related-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            padding: 2px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            margin-bottom: 10px;
            font-weight: 500;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.85);
            padding: 50px 0 30px;
            margin-top: auto;
            border-top: 4px solid var(--primary);
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.7); margin-bottom: 0; }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul li a {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .site-footer ul li a:hover { color: var(--accent-light); padding-left: 4px; }
        .site-footer ul li a i { width: 18px; color: var(--accent-light); font-size: 0.85rem; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.10);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent-light); }

        /* ===== Mobile Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 18px;
            left: 18px;
            z-index: 1100;
            width: 44px;
            height: 44px;
            border: none;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            box-shadow: var(--shadow-md);
            cursor: pointer;
            font-size: 1.3rem;
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: var(--primary); color: #fff; }
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 999;
            backdrop-filter: blur(2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            body { flex-direction: column; }
            .nav-toggle { display: flex; }
            .nav-overlay.active { display: block; }
            .nav-side {
                transform: translateX(-100%);
                width: 280px;
                border-right: none;
                box-shadow: 4px 0 40px rgba(0,0,0,0.15);
            }
            .nav-side.open { transform: translateX(0); }
            .main-content { margin-left: 0; }
            .article-banner { padding: 40px 0 60px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-body { padding: 24px 20px; }
            .article-meta-info { font-size: 0.8rem; gap: 12px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .related-grid { grid-template-columns: 1fr; }
            .article-sidebar { grid-template-columns: 1fr; }
        }

        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.5rem; }
            .article-body { padding: 18px 14px; }
            .article-body .article-content { font-size: 0.95rem; }
            .container { padding: 0 16px; }
            .related-card img { height: 140px; }
        }

        /* ===== Print ===== */
        @media print {
            .nav-side, .nav-toggle, .nav-overlay, .article-sidebar, .related-section, .site-footer { display: none; }
            .main-content { margin-left: 0; }
            .article-banner { padding: 20px 0; background: #fff !important; color: #000 !important; }
            .article-banner h1 { color: #000 !important; }
            .article-body { box-shadow: none; border: none; padding: 0; }
        }

/* roulang page: category1 */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1c0c0;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1d3557;
            --bg-light: #f1f3f5;
            --text-primary: #212529;
            --text-secondary: #495057;
            --text-muted: #868e96;
            --text-light: #f8f9fa;
            --border-color: #e9ecef;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --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 20px 48px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-width: 240px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; margin-bottom: 1rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; width: 100%; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 680px; margin: 0 auto; color: var(--text-muted); font-size: 1.05rem; }

        /* ===== 左侧导航 ===== */
        .nav-side {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            padding: 28px 16px;
            z-index: 1000;
            transition: var(--transition);
            box-shadow: 2px 0 12px rgba(0,0,0,0.04);
        }
        .nav-side .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            padding: 8px 12px 20px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 20px;
        }
        .nav-side .logo i { font-size: 1.5rem; color: var(--primary); }
        .nav-side .logo span { color: var(--text-primary); }
        .nav-links { display: flex; flex-direction: column; gap: 4px; flex: 1; }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--border-radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .nav-links a i { width: 20px; text-align: center; font-size: 1.05rem; }
        .nav-links a:hover { background: var(--bg-light); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(230,57,70,0.3);
        }
        .nav-links a.active i { color: #fff; }
        .nav-footer {
            padding: 16px 12px 0;
            border-top: 1px solid var(--border-color);
            margin-top: auto;
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .nav-footer p { margin-bottom: 2px; color: var(--text-muted); }

        /* ===== 移动端导航切换 ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 14px;
            border-radius: var(--border-radius-sm);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            width: calc(100% - var(--nav-width));
        }

        /* ===== Hero 区域 ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #1d3557 0%, #2a4a7f 40%, #457b9d 80%, #a8dadc 100%);
            color: #fff;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(29,53,87,0.85) 0%, rgba(69,123,157,0.65) 100%);
        }
        .hero .container { position: relative; z-index: 2; text-align: center; }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: #fff;
            text-shadow: 0 4px 20px rgba(0,0,0,0.2);
            letter-spacing: 1px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.9);
            max-width: 720px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(230,57,70,0.35); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(230,57,70,0.45); color: #fff; }
        .btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6); }
        .btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; transform: translateY(-3px); color: #fff; }
        .btn-lg { padding: 16px 40px; font-size: 1.1rem; }

        /* ===== 通用板块 ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-alt { background: var(--bg-light); }

        /* ===== 核心优势卡片 ===== */
        .advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .advantage-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 36px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .advantage-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
        .advantage-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
        }
        .advantage-card h3 { margin-bottom: 12px; }
        .advantage-card p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 赛事分类卡片 ===== */
        .sport-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .sport-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .sport-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .sport-card .img-wrap {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .sport-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .sport-card:hover .img-wrap img { transform: scale(1.08); }
        .sport-card .img-wrap .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .sport-card .info { padding: 20px 20px 24px; }
        .sport-card .info h4 { margin-bottom: 8px; font-size: 1.1rem; }
        .sport-card .info p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; }
        .sport-card .info .meta { display: flex; gap: 16px; font-size: 0.82rem; color: var(--text-muted); }
        .sport-card .info .meta i { margin-right: 4px; }

        /* ===== 适用场景 ===== */
        .scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .scene-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .scene-card .icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .scene-card h4 { margin-bottom: 10px; }
        .scene-card p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 流程步骤 ===== */
        .steps { display: flex; gap: 0; counter-reset: step; justify-content: center; flex-wrap: wrap; }
        .step-item {
            flex: 1;
            min-width: 200px;
            max-width: 260px;
            text-align: center;
            padding: 32px 20px;
            position: relative;
        }
        .step-item::after {
            content: '→';
            position: absolute;
            right: -12px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 2rem;
            color: var(--primary-light);
            font-weight: 300;
        }
        .step-item:last-child::after { display: none; }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 8px 20px rgba(230,57,70,0.25);
        }
        .step-item h4 { margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 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(--border-radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i { transition: var(--transition); color: var(--primary); font-size: 1.1rem; }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-answer.open { max-height: 300px; padding: 0 24px 18px; }
        .faq-answer p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1d3557 0%, #2a4a7f 50%, #457b9d 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .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(255,255,255,0.85); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }
        .cta-section .btn-primary { background: var(--accent); color: #1d3557; box-shadow: 0 8px 24px rgba(244,162,97,0.35); }
        .cta-section .btn-primary:hover { background: #e08f4a; transform: translateY(-3px); color: #1d3557; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .logo { font-size: 1.2rem; font-weight: 800; color: var(--primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }
        .site-footer h4 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul li a { font-size: 0.9rem; color: var(--text-secondary); display: inline-flex; align-items: center; gap: 8px; }
        .site-footer ul li a:hover { color: var(--primary); }
        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sport-grid { grid-template-columns: repeat(2, 1fr); }
            .advantage-grid { grid-template-columns: repeat(2, 1fr); }
            .scene-grid { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            :root { --nav-width: 0px; --spacing-section: 48px; }
            .nav-side {
                transform: translateX(-100%);
                width: 260px;
                box-shadow: 4px 0 32px rgba(0,0,0,0.2);
            }
            .nav-side.open { transform: translateX(0); }
            .nav-toggle { display: block; }
            .main-content { margin-left: 0; width: 100%; }
            .hero { padding: 80px 0 60px; min-height: auto; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .advantage-grid, .sport-grid, .scene-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .steps { flex-direction: column; align-items: center; }
            .step-item { max-width: 100%; width: 100%; }
            .step-item::after { display: none; }
            .section-title h2 { font-size: 1.6rem; }
            .cta-section h2 { font-size: 1.6rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero p { font-size: 0.92rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn { width: 100%; justify-content: center; }
            .container { padding: 0 16px; }
            .advantage-card, .sport-card, .scene-card { padding: 20px 16px; }
        }

        /* ===== 辅助工具 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mb-1 { margin-bottom: 1rem; }
        .gap-2 { gap: 0.5rem; }

        /* ===== 覆盖默认 ===== */
        .faq-question:focus { outline: 2px solid var(--primary); outline-offset: -2px; }
        .btn:focus { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }