/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0f1f3d;
        --primary-light: #1a3a6b;
        --primary-dark: #081020;
        --secondary: #d62828;
        --secondary-light: #ef476f;
        --accent: #f4a261;
        --accent-light: #f9c74f;
        --bg: #f5f7fa;
        --bg-card: #ffffff;
        --bg-dark: #0b1325;
        --bg-section-alt: #eef1f7;
        --text: #1a1a2e;
        --text-light: #5a6a7a;
        --text-muted: #8a9aa8;
        --text-white: #ffffff;
        --border: #dde3ec;
        --radius: 14px;
        --radius-sm: 8px;
        --radius-xs: 4px;
        --shadow: 0 6px 28px rgba(0,0,0,0.06);
        --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
        --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
        --transition: all 0.35s cubic-bezier(0.25,0.46,0.45,0.94);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --container: 1200px;
        --nav-height: 72px;
    }

    /* ===== 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);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
    button { cursor: pointer; border: none; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
    h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
    h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
    h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 0.8rem; color: var(--text-light); }
    .container {
        width: 100%;
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 按钮系统 ===== */
    .btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 14px 32px; border-radius: 50px;
        font-weight: 600; font-size: 0.95rem;
        transition: var(--transition); border: 2px solid transparent;
        justify-content: center; white-space: nowrap;
    }
    .btn-primary {
        background: var(--secondary); color: var(--text-white); border-color: var(--secondary);
    }
    .btn-primary:hover { background: #b71c1c; border-color: #b71c1c; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(214,40,40,0.35); color: #fff; }
    .btn-outline {
        background: transparent; color: var(--text-white); border-color: var(--text-white);
    }
    .btn-outline:hover { background: var(--text-white); color: var(--primary); border-color: var(--text-white); transform: translateY(-2px); }
    .btn-accent {
        background: var(--accent); color: var(--primary-dark); border-color: var(--accent);
    }
    .btn-accent:hover { background: #e08c3a; border-color: #e08c3a; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(244,162,97,0.35); color: var(--primary-dark); }
    .btn-sm { padding: 10px 20px; font-size: 0.85rem; }

    /* ===== 标签 / 徽章 ===== */
    .badge {
        display: inline-block; padding: 4px 14px; border-radius: 50px;
        font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
        letter-spacing: 0.3px; background: var(--accent-light); color: var(--primary-dark);
    }
    .badge-red { background: var(--secondary); color: #fff; }
    .badge-blue { background: var(--primary-light); color: #fff; }
    .badge-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text-light); }

    /* ===== 导航 header ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
        height: var(--nav-height); background: rgba(15,31,61,0.92); backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(255,255,255,0.06);
        transition: var(--transition);
    }
    .site-header .container {
        display: flex; align-items: center; justify-content: space-between;
        height: 100%;
    }
    .header-logo {
        font-size: 1.35rem; font-weight: 800; color: var(--text-white);
        letter-spacing: -0.3px; display: flex; align-items: center; gap: 8px;
    }
    .header-logo i { color: var(--secondary); font-size: 1.5rem; }
    .header-logo span { background: linear-gradient(135deg, #fff 60%, var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .header-nav { display: flex; align-items: center; gap: 32px; }
    .header-nav a {
        color: rgba(255,255,255,0.75); font-weight: 500; font-size: 0.92rem;
        padding: 4px 0; position: relative; transition: var(--transition);
    }
    .header-nav a::after {
        content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2.5px;
        background: var(--secondary); border-radius: 4px; transition: var(--transition);
    }
    .header-nav a:hover { color: #fff; }
    .header-nav a:hover::after { width: 100%; }
    .header-nav a.active { color: #fff; }
    .header-nav a.active::after { width: 100%; background: var(--accent); }
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .header-search {
        display: flex; align-items: center; background: rgba(255,255,255,0.1);
        border-radius: 50px; padding: 6px 16px; border: 1px solid rgba(255,255,255,0.08);
        transition: var(--transition);
    }
    .header-search:focus-within { background: rgba(255,255,255,0.18); border-color: var(--accent); }
    .header-search input {
        background: none; border: none; color: #fff; padding: 6px 0; width: 140px;
        font-size: 0.85rem;
    }
    .header-search input::placeholder { color: rgba(255,255,255,0.4); }
    .header-search i { color: rgba(255,255,255,0.5); font-size: 0.9rem; }
    .header-mobile-toggle { display: none; color: #fff; font-size: 1.5rem; cursor: pointer; }

    /* ===== 移动端导航 ===== */
    @media (max-width: 768px) {
        .header-nav { display: none; }
        .header-actions .header-search { display: none; }
        .header-mobile-toggle { display: block; }
        .site-header .container { padding: 0 16px; }
        .header-nav.mobile-open {
            display: flex; flex-direction: column; position: fixed; top: var(--nav-height);
            left: 0; right: 0; background: var(--primary-dark); padding: 24px 32px;
            gap: 20px; border-bottom: 1px solid rgba(255,255,255,0.06);
            box-shadow: var(--shadow-lg); align-items: stretch;
        }
        .header-nav.mobile-open a { font-size: 1.05rem; padding: 8px 0; }
        .header-nav.mobile-open a::after { display: none; }
        .header-actions .btn { display: none; }
        .container { padding: 0 16px; }
    }

    @media (min-width: 769px) and (max-width: 1024px) {
        .header-nav { gap: 20px; }
        .header-search input { width: 100px; }
    }

    /* ===== Hero 首屏 ===== */
    .hero {
        min-height: 100vh;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #162a4a 100%);
        display: flex; align-items: center; position: relative; overflow: hidden;
        padding-top: var(--nav-height);
    }
    .hero-bg {
        position: absolute; inset: 0; z-index: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.15; mix-blend-mode: overlay;
    }
    .hero-overlay {
        position: absolute; inset: 0; z-index: 1;
        background: radial-gradient(ellipse at 30% 50%, rgba(214,40,40,0.15) 0%, transparent 60%);
    }
    .hero .container { position: relative; z-index: 2; display: flex; align-items: center; gap: 60px; padding-top: 40px; padding-bottom: 60px; }
    .hero-content { flex: 1.2; }
    .hero-content .badge { margin-bottom: 20px; }
    .hero-content h1 { color: var(--text-white); margin-bottom: 18px; line-height: 1.15; }
    .hero-content h1 span { color: var(--accent); border-bottom: 3px solid var(--secondary); display: inline-block; }
    .hero-content p { color: rgba(255,255,255,0.7); font-size: 1.15rem; max-width: 560px; margin-bottom: 32px; }
    .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .hero-visual { flex: 0.9; position: relative; display: flex; justify-content: center; }
    .hero-visual img { width: 100%; max-width: 520px; border-radius: var(--radius); box-shadow: var(--shadow-lg); transform: perspective(800px) rotateY(-6deg); transition: var(--transition); }
    .hero-visual img:hover { transform: perspective(800px) rotateY(0deg); }
    .hero-stats {
        display: flex; gap: 32px; margin-top: 40px; padding-top: 28px;
        border-top: 1px solid rgba(255,255,255,0.08);
    }
    .hero-stats .stat-item { text-align: center; }
    .hero-stats .stat-num { font-size: 1.8rem; font-weight: 800; color: var(--accent); }
    .hero-stats .stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.5px; }

    @media (max-width: 900px) {
        .hero .container { flex-direction: column; text-align: center; padding-top: 20px; }
        .hero-content p { max-width: 100%; }
        .hero-buttons { justify-content: center; }
        .hero-stats { justify-content: center; }
        .hero-visual img { max-width: 380px; transform: none; }
        .hero-visual img:hover { transform: none; }
    }
    @media (max-width: 520px) {
        .hero { min-height: 90vh; }
        .hero-stats { gap: 20px; flex-wrap: wrap; justify-content: center; }
        .hero-stats .stat-num { font-size: 1.4rem; }
    }

    /* ===== 通用板块 ===== */
    .section { padding: 80px 0; }
    .section-alt { background: var(--bg-section-alt); }
    .section-dark { background: var(--bg-dark); color: var(--text-white); }
    .section-title { text-align: center; margin-bottom: 48px; }
    .section-title h2 { margin-bottom: 12px; }
    .section-title p { max-width: 600px; margin: 0 auto; color: var(--text-light); font-size: 1.05rem; }
    .section-title .badge { margin-bottom: 12px; }

    /* ===== 卡片网格 ===== */
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }

    .card {
        background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
        box-shadow: var(--shadow); transition: var(--transition);
        border: 1px solid var(--border);
    }
    .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
    .card-body { padding: 24px; }
    .card-body h3 { margin-bottom: 8px; font-size: 1.15rem; }
    .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 12px; }
    .card-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; color: var(--text-muted); }

    .card-dark { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); }
    .card-dark h3 { color: #fff; }
    .card-dark p { color: rgba(255,255,255,0.6); }
    .card-dark .card-footer { border-color: rgba(255,255,255,0.08); color: rgba(255,255,255,0.4); }

    @media (max-width: 1024px) {
        .grid-4 { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
        .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .grid-2 { grid-template-columns: 1fr; }
        .section { padding: 56px 0; }
    }
    @media (max-width: 520px) {
        .grid-3 { grid-template-columns: 1fr; }
        .grid-4 { grid-template-columns: 1fr; }
    }

    /* ===== 分类入口板块 ===== */
    .category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .category-card {
        background: var(--bg-card); border-radius: var(--radius); padding: 28px 20px;
        text-align: center; box-shadow: var(--shadow); transition: var(--transition);
        border: 1px solid var(--border); cursor: pointer;
    }
    .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--secondary); }
    .category-card i { font-size: 2.4rem; color: var(--secondary); margin-bottom: 16px; }
    .category-card h4 { font-size: 1rem; margin-bottom: 6px; }
    .category-card p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }
    .category-card .badge { margin-top: 12px; }

    @media (max-width: 1024px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 520px) { .category-grid { grid-template-columns: 1fr; } }

    /* ===== 资讯列表 ===== */
    .news-list { display: flex; flex-direction: column; gap: 20px; }
    .news-item {
        display: flex; gap: 20px; background: var(--bg-card); border-radius: var(--radius);
        padding: 20px; box-shadow: var(--shadow); border: 1px solid var(--border);
        transition: var(--transition); align-items: flex-start;
    }
    .news-item:hover { transform: translateX(6px); box-shadow: var(--shadow-hover); }
    .news-item-img { width: 180px; min-height: 120px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
    .news-item-body { flex: 1; }
    .news-item-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
    .news-item-body p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .news-item-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
    .news-item-meta i { margin-right: 4px; }

    @media (max-width: 640px) {
        .news-item { flex-direction: column; }
        .news-item-img { width: 100%; min-height: 160px; }
    }

    /* ===== 数据统计 ===== */
    .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
    .stat-card {
        text-align: center; padding: 32px 20px; background: rgba(255,255,255,0.05);
        border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08);
        transition: var(--transition);
    }
    .stat-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
    .stat-card .stat-icon { font-size: 2.2rem; color: var(--accent); margin-bottom: 12px; }
    .stat-card .stat-number { font-size: 2.4rem; font-weight: 800; color: #fff; }
    .stat-card .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 4px; }

    @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; } }
    @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

    /* ===== 流程步骤 ===== */
    .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; position: relative; }
    .step { text-align: center; position: relative; }
    .step-num {
        width: 52px; height: 52px; border-radius: 50%; background: var(--secondary);
        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(214,40,40,0.25);
    }
    .step h4 { margin-bottom: 8px; }
    .step p { font-size: 0.9rem; color: var(--text-light); max-width: 280px; margin: 0 auto; }
    .step::after {
        content: ''; position: absolute; top: 26px; left: 60%; width: 80%; height: 2px;
        background: linear-gradient(to right, var(--border), transparent);
    }
    .step:last-child::after { display: none; }

    @media (max-width: 768px) {
        .steps { grid-template-columns: 1fr; gap: 24px; }
        .step::after { display: none; }
    }

    /* ===== 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-sm);
        border: 1px solid var(--border); overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--primary-light); }
    .faq-question {
        padding: 18px 24px; display: flex; justify-content: space-between; align-items: center;
        font-weight: 600; font-size: 0.98rem; cursor: pointer; color: var(--primary);
        transition: var(--transition);
    }
    .faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 0.85rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--secondary); }
    .faq-answer {
        max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px; color: var(--text-light); font-size: 0.92rem; line-height: 1.7;
    }
    .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 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: 0.06; mix-blend-mode: overlay;
    }
    .cta-section .container { position: relative; z-index: 1; }
    .cta-section h2 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.6rem); margin-bottom: 16px; }
    .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
    .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 56px 0 32px;
        border-top: 1px solid rgba(255,255,255,0.05);
    }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
    .footer-brand .header-logo { margin-bottom: 16px; }
    .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.5); max-width: 320px; }
    .footer-col h5 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
    .footer-col a { display: block; font-size: 0.88rem; color: rgba(255,255,255,0.55); padding: 4px 0; transition: var(--transition); }
    .footer-col a:hover { color: var(--accent); padding-left: 6px; }
    .footer-social { display: flex; gap: 12px; margin-top: 20px; }
    .footer-social a {
        width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.08);
        display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6);
        transition: var(--transition); font-size: 1rem;
    }
    .footer-social a:hover { background: var(--secondary); color: #fff; transform: translateY(-3px); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px;
        display: flex; justify-content: space-between; align-items: center;
        font-size: 0.82rem; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 12px;
    }

    @media (max-width: 768px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; }
    }

    /* ===== 文章页专用 ===== */
    .article-header {
        padding-top: calc(var(--nav-height) + 40px); padding-bottom: 40px;
        background: var(--primary); position: relative; overflow: hidden;
    }
    .article-header::before {
        content: ''; position: absolute; inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.08; mix-blend-mode: overlay;
    }
    .article-header .container { position: relative; z-index: 1; }
    .article-header .badge { margin-bottom: 16px; }
    .article-header h1 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.6rem); max-width: 800px; margin-bottom: 16px; }
    .article-meta { display: flex; gap: 20px; color: rgba(255,255,255,0.6); font-size: 0.9rem; flex-wrap: wrap; }
    .article-meta i { margin-right: 4px; }
    .article-body { padding: 48px 0 64px; }
    .article-content {
        max-width: 800px; margin: 0 auto; background: var(--bg-card);
        border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow);
        border: 1px solid var(--border);
        font-size: 1.02rem; line-height: 1.85; color: var(--text);
    }
    .article-content h2 { margin-top: 32px; margin-bottom: 12px; }
    .article-content h3 { margin-top: 24px; margin-bottom: 8px; }
    .article-content p { margin-bottom: 16px; color: var(--text); }
    .article-content img { border-radius: var(--radius-sm); margin: 24px 0; }
    .article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 16px; color: var(--text-light); }
    .article-content li { margin-bottom: 6px; }
    .article-notfound { text-align: center; padding: 60px 20px; }
    .article-notfound h2 { margin-bottom: 16px; }
    .article-notfound a { color: var(--secondary); font-weight: 600; }

    @media (max-width: 640px) {
        .article-content { padding: 24px 20px; }
        .article-header { padding-top: calc(var(--nav-height) + 20px); padding-bottom: 24px; }
    }

    /* ===== 分类页专用 ===== */
    .category-header {
        padding-top: calc(var(--nav-height) + 40px); padding-bottom: 40px;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
        position: relative; overflow: hidden;
    }
    .category-header::before {
        content: ''; position: absolute; inset: 0;
        background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
        opacity: 0.1; mix-blend-mode: overlay;
    }
    .category-header .container { position: relative; z-index: 1; }
    .category-header h1 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 12px; }
    .category-header p { color: rgba(255,255,255,0.65); max-width: 600px; font-size: 1.05rem; }

    /* ===== 空状态 ===== */
    .empty-state { text-align: center; padding: 48px 20px; color: var(--text-muted); }
    .empty-state i { font-size: 3rem; margin-bottom: 16px; color: var(--border); }
    .empty-state p { font-size: 1rem; }

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

    /* ===== 响应式微调 ===== */
    @media (max-width: 480px) {
        .btn { padding: 12px 24px; font-size: 0.88rem; }
        .hero-content h1 { font-size: 1.8rem; }
        .section-title h2 { font-size: 1.4rem; }
    }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #e63946;
            --color-primary-dark: #c1121f;
            --color-primary-light: #ff6b6b;
            --color-secondary: #1d3557;
            --color-secondary-light: #457b9d;
            --color-accent: #f4a261;
            --color-bg: #f8f9fa;
            --color-bg-alt: #ffffff;
            --color-bg-dark: #1a1a2e;
            --color-text: #2b2d42;
            --color-text-light: #6c757d;
            --color-text-lighter: #adb5bd;
            --color-border: #dee2e6;
            --color-border-light: #e9ecef;
            --color-white: #ffffff;
            --color-success: #2a9d8f;
            --color-warning: #e9c46a;
            --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-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --header-height: 72px;
        }

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

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-secondary);
            letter-spacing: -0.5px;
        }
        .header-logo i {
            color: var(--color-primary);
            font-size: 28px;
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            position: relative;
            transition: var(--transition);
        }
        .header-nav a:hover {
            color: var(--color-primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .header-nav a.active {
            color: var(--color-white);
            background: var(--color-primary);
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .header-nav a.active:hover {
            background: var(--color-primary-dark);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
        }
        .header-search input {
            background: transparent;
            padding: 8px 0;
            font-size: 14px;
            color: var(--color-text);
            width: 140px;
            border: none;
        }
        .header-search input::placeholder {
            color: var(--color-text-lighter);
        }
        .header-search button {
            background: transparent;
            color: var(--color-text-light);
            font-size: 15px;
            padding: 8px 0 8px 12px;
            transition: var(--transition);
        }
        .header-search button:hover {
            color: var(--color-primary);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: none;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-secondary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero Banner (Article Top) ===== */
        .article-hero {
            margin-top: var(--header-height);
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--color-secondary) 0%, #16213e 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
        }
        .article-hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .article-hero-breadcrumb a:hover {
            color: var(--color-white);
        }
        .article-hero-breadcrumb i {
            font-size: 12px;
        }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            color: var(--color-white);
            max-width: 900px;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }
        .article-hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero-meta i {
            font-size: 14px;
        }
        .article-hero-meta .category-tag {
            background: var(--color-primary);
            color: var(--color-white);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
        }

        /* ===== Main Content ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .article-body .content {
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--color-text);
        }
        .article-body .content p {
            margin-bottom: 1.4em;
        }
        .article-body .content h2,
        .article-body .content h3 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-body .content li {
            margin-bottom: 0.4em;
            list-style: disc;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-bg);
            padding: 16px 24px;
            margin: 1.4em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-light);
            font-style: italic;
        }
        .article-body .content a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover {
            color: var(--color-primary-dark);
        }
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 64px;
            color: var(--color-text-lighter);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--color-text-light);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            display: inline-block;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .sidebar-card h4 {
            font-size: 17px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--color-secondary);
        }
        .sidebar-card h4 i {
            color: var(--color-primary);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--color-border-light);
        }
        .sidebar-list-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .sidebar-list-item img {
            width: 64px;
            height: 48px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .sidebar-list-item .info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-list-item .info a {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list-item .info a:hover {
            color: var(--color-primary);
        }
        .sidebar-list-item .info .meta {
            font-size: 12px;
            color: var(--color-text-lighter);
            margin-top: 4px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            background: var(--color-bg);
            color: var(--color-text-light);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }
        .sidebar-tags a:hover {
            background: var(--color-primary);
            color: var(--color-white);
            border-color: var(--color-primary);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--color-secondary), #16213e);
            color: var(--color-white);
            border: none;
        }
        .sidebar-cta h4 {
            color: var(--color-white);
        }
        .sidebar-cta h4 i {
            color: var(--color-accent);
        }
        .sidebar-cta p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .sidebar-cta .btn {
            background: var(--color-primary);
            color: var(--color-white);
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.35);
        }

        /* ===== Related Articles Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--color-white);
            border-top: 1px solid var(--color-border-light);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 {
            font-size: 28px;
            position: relative;
            display: inline-block;
        }
        .related-section .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            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 .body {
            padding: 20px 20px 24px;
        }
        .related-card .body .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(230, 57, 70, 0.08);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }
        .related-card .body h3 {
            font-size: 16px;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .body h3 a {
            color: var(--color-secondary);
        }
        .related-card .body h3 a:hover {
            color: var(--color-primary);
        }
        .related-card .body p {
            font-size: 14px;
            color: var(--color-text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .body .meta {
            font-size: 12px;
            color: var(--color-text-lighter);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--color-secondary) 0%, #16213e 100%);
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .article-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-cta h2 {
            font-size: clamp(24px, 3.5vw, 36px);
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .article-cta p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .article-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            background: var(--color-primary);
            color: var(--color-white);
            transition: var(--transition);
            border: none;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
            color: var(--color-white);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: var(--color-white);
            color: var(--color-secondary);
            border-color: var(--color-white);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f1a2e;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .header-logo {
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .footer-brand .header-logo span {
            background: linear-gradient(135deg, #ff6b6b, #f4a261);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 340px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 17px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-3px);
        }
        .footer-col h5 {
            color: var(--color-white);
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--color-white);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
            margin-right: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom span:first-child {
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 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);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                pointer-events: none;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .header-search input {
                width: 100px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .article-hero {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .article-hero h1 {
                font-size: 24px;
            }
            .article-body {
                padding: 24px 20px;
            }
            .article-body .content {
                font-size: 15px;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-cta h2 {
                font-size: 22px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 28px;
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 20px;
            }
            .article-hero-meta {
                font-size: 12px;
                gap: 10px 16px;
            }
            .article-body {
                padding: 20px 16px;
            }
            .article-body .content {
                font-size: 14.5px;
            }
            .header-logo {
                font-size: 18px;
            }
            .header-logo i {
                font-size: 22px;
            }
            .header-search input {
                width: 70px;
                font-size: 13px;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .related-card .body {
                padding: 16px;
            }
            .related-card .body h3 {
                font-size: 15px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 8px 30px rgba(230,57,70,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1240px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 排版 ===== */
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.2rem; letter-spacing: -0.01em; margin-bottom: 16px; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 40px;
            text-align: center;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.02em;
        }
        .header-logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .header-logo span {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .header-nav a:hover {
            color: var(--primary);
            background: rgba(230,57,70,0.06);
        }
        .header-nav a.active {
            color: var(--primary);
            background: rgba(230,57,70,0.1);
            font-weight: 600;
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-search {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text);
            transition: var(--transition);
            font-size: 1rem;
        }
        .btn-search:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border: 2px solid #fff;
        }
        .btn-white:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
        }

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero / Banner ===== */
        .category-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(26,26,46,0.85), rgba(230,57,70,0.7)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            padding: 80px 0 60px;
        }
        .category-banner-content {
            max-width: 780px;
        }
        .category-banner h1 {
            color: #fff;
            font-size: 3.2rem;
            margin-bottom: 16px;
        }
        .category-banner p {
            font-size: 1.15rem;
            opacity: 0.92;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .category-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 20px;
        }
        .category-banner .breadcrumb a {
            color: rgba(255,255,255,0.8);
        }
        .category-banner .breadcrumb a:hover {
            color: #fff;
        }
        .category-banner .breadcrumb span {
            color: #fff;
        }
        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .banner-tag {
            padding: 6px 16px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            border-radius: 20px;
            font-size: 0.85rem;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2);
            transition: var(--transition);
        }
        .banner-tag:hover {
            background: rgba(255,255,255,0.25);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #fff;
        }
        .section-dark h2,
        .section-dark .section-subtitle {
            color: #fff;
        }
        .section-dark .section-subtitle {
            opacity: 0.8;
        }

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

        /* ===== 项目分类卡片 ===== */
        .category-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card:hover::before {
            transform: scaleX(1);
        }
        .category-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: rgba(230,57,70,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .category-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
        }
        .category-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .category-card .card-count {
            display: inline-block;
            margin-top: 12px;
            padding: 4px 14px;
            background: rgba(230,57,70,0.08);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== 推荐项目卡片 ===== */
        .project-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .project-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .project-card:hover .card-img {
            transform: scale(1.03);
        }
        .project-card .card-body {
            padding: 20px 22px 24px;
        }
        .project-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .project-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .project-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .project-card .card-meta i {
            margin-right: 4px;
        }
        .project-card .card-meta .badge {
            padding: 3px 12px;
            border-radius: 20px;
            background: rgba(230,57,70,0.08);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.8rem;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 20px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            opacity: 0.75;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            margin-bottom: 12px;
            opacity: 0.6;
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .news-item .news-icon {
            width: 44px;
            height: 44px;
            background: rgba(230,57,70,0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .news-item .news-content {
            flex: 1;
        }
        .news-item .news-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .news-item .news-content p {
            font-size: 0.88rem;
            color: var(--text-light);
        }
        .news-item .news-tag {
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(230,57,70,0.06);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question.active 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-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2.4rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .header-logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .header-logo span {
            background: linear-gradient(135deg, #fff, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            opacity: 0.7;
            margin-bottom: 18px;
            max-width: 340px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 18px;
            font-weight: 700;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            opacity: 0.6;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            .category-banner h1 { font-size: 2.6rem; }
        }

        @media (max-width: 768px) {
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .header-nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .header-nav a.active::after {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-cta .btn-primary span {
                display: none;
            }
            .header-cta .btn-primary {
                padding: 10px 16px;
            }
            .category-banner {
                min-height: 300px;
                padding: 60px 0 40px;
            }
            .category-banner h1 { font-size: 2rem; }
            .category-banner p { font-size: 1rem; }
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-2 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .section { padding: 52px 0; }
            .news-item { flex-direction: column; align-items: flex-start; gap: 10px; }
            .news-item .news-tag { align-self: flex-start; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
        }

        @media (max-width: 520px) {
            :root { --header-height: 64px; }
            .container { padding: 0 16px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .category-banner h1 { font-size: 1.6rem; }
            .grid-4 { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item { padding: 20px 12px; }
            .stat-item .stat-number { font-size: 2rem; }
            .category-card { padding: 24px 16px; }
            .project-card .card-img { height: 160px; }
            .cta-buttons { flex-direction: column; align-items: center; }
            .banner-tags { justify-content: center; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }