/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --clr-primary: #1a3a6b;
        --clr-primary-light: #2a5a9e;
        --clr-primary-dark: #0f2442;
        --clr-accent: #d4442a;
        --clr-accent-light: #e8603a;
        --clr-accent-dark: #b0301a;
        --clr-bg: #f5f7fa;
        --clr-bg-alt: #eef1f5;
        --clr-bg-dark: #0f1a2b;
        --clr-text: #1a2332;
        --clr-text-light: #4a5a6e;
        --clr-text-muted: #7a8a9e;
        --clr-white: #ffffff;
        --clr-border: #dce1e8;
        --clr-border-light: #e8ecf2;
        --clr-success: #1f8b4c;
        --clr-warning: #d99f2a;
        --clr-tag-bg: #e8ecf2;
        --clr-tag-text: #2a3a5a;
        --radius-sm: 6px;
        --radius-md: 10px;
        --radius-lg: 18px;
        --radius-xl: 24px;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
        --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
        --shadow-lg: 0 10px 30px rgba(0,0,0,0.10);
        --shadow-xl: 0 20px 50px rgba(0,0,0,0.14);
        --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        --container-max: 1200px;
        --nav-height: 72px;
        --spacer-section: 5rem;
        --spacer-block: 2.5rem;
    }

    /* ===== 基础 Reset ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.65;
        color: var(--clr-text);
        background: var(--clr-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--clr-primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--clr-accent); }
    a:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; border-radius: 2px; }
    button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; transition: all var(--transition); }
    button:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; }
    input, textarea { font-family: inherit; font-size: inherit; border: 1px solid var(--clr-border); border-radius: var(--radius-sm); padding: 0.6rem 1rem; background: var(--clr-white); color: var(--clr-text); transition: border var(--transition), box-shadow var(--transition); }
    input:focus, textarea:focus { border-color: var(--clr-primary-light); box-shadow: 0 0 0 3px rgba(26,58,107,0.12); outline: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--clr-text); font-weight: 700; }
    h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
    h2 { font-size: 2rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--clr-text-light); }
    ::selection { background: var(--clr-primary); color: var(--clr-white); }

    /* ===== 容器 ===== */
    .container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.8rem; width: 100%; }

    /* ===== 导航 ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
        height: var(--nav-height);
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--clr-border-light);
        box-shadow: var(--shadow-sm);
        transition: background var(--transition), box-shadow var(--transition);
    }
    .site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow-md); }
    .header-inner {
        display: flex; align-items: center; justify-content: space-between;
        height: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 1.8rem;
    }
    .logo {
        display: flex; align-items: center; gap: 0.5rem;
        font-size: 1.35rem; font-weight: 800; color: var(--clr-primary);
        letter-spacing: -0.02em; white-space: nowrap;
    }
    .logo-icon { width: 36px; height: 36px; border-radius: var(--radius-sm); background: var(--clr-primary); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem; flex-shrink: 0; }
    .logo:hover { color: var(--clr-primary); opacity: 0.88; }
    .main-nav { display: flex; align-items: center; gap: 0.2rem; }
    .main-nav a {
        padding: 0.5rem 1.1rem; border-radius: var(--radius-md);
        font-size: 0.95rem; font-weight: 500; color: var(--clr-text-light);
        transition: all var(--transition); position: relative;
    }
    .main-nav a:hover { color: var(--clr-primary); background: rgba(26,58,107,0.06); }
    .main-nav a.active { color: var(--clr-primary); background: rgba(26,58,107,0.08); font-weight: 600; }
    .main-nav a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; border-radius: 2px; background: var(--clr-accent); }
    .nav-actions { display: flex; align-items: center; gap: 0.75rem; }
    .nav-search {
        display: flex; align-items: center; background: var(--clr-bg-alt);
        border-radius: var(--radius-md); padding: 0.3rem 0.3rem 0.3rem 1rem;
        border: 1px solid transparent; transition: all var(--transition);
    }
    .nav-search:focus-within { border-color: var(--clr-primary-light); background: var(--clr-white); box-shadow: 0 0 0 3px rgba(26,58,107,0.08); }
    .nav-search input { border: none; background: transparent; padding: 0.3rem 0; font-size: 0.9rem; width: 140px; color: var(--clr-text); }
    .nav-search input:focus { box-shadow: none; border: none; }
    .nav-search button { padding: 0.4rem 0.8rem; border-radius: var(--radius-sm); color: var(--clr-text-muted); font-size: 0.95rem; }
    .nav-search button:hover { color: var(--clr-primary); }
    .btn-cta {
        display: inline-flex; align-items: center; gap: 0.4rem;
        background: var(--clr-accent); color: var(--clr-white);
        padding: 0.55rem 1.4rem; border-radius: var(--radius-md);
        font-weight: 600; font-size: 0.92rem;
        box-shadow: 0 2px 8px rgba(212,68,42,0.25);
        transition: all var(--transition); white-space: nowrap;
    }
    .btn-cta:hover { background: var(--clr-accent-light); color: var(--clr-white); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(212,68,42,0.30); }
    .btn-cta:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(212,68,42,0.20); }
    .btn-cta i { font-size: 0.85rem; }

    .mobile-toggle { display: none; font-size: 1.5rem; color: var(--clr-text); padding: 0.3rem; border-radius: var(--radius-sm); }
    .mobile-toggle:hover { background: var(--clr-bg-alt); }

    /* ===== Hero ===== */
    .hero {
        position: relative; margin-top: var(--nav-height);
        min-height: 560px; display: flex; align-items: center;
        background: var(--clr-bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        overflow: hidden;
    }
    .hero::before {
        content: ''; position: absolute; inset: 0;
        background: linear-gradient(135deg, rgba(15,26,43,0.88) 0%, rgba(15,26,43,0.55) 60%, rgba(15,26,43,0.30) 100%);
        z-index: 1;
    }
    .hero-content { position: relative; z-index: 2; max-width: 720px; padding: 4rem 0; }
    .hero-badge {
        display: inline-flex; align-items: center; gap: 0.4rem;
        background: rgba(255,255,255,0.12); backdrop-filter: blur(6px);
        border: 1px solid rgba(255,255,255,0.18);
        color: #fff; padding: 0.35rem 1.1rem; border-radius: 50px;
        font-size: 0.85rem; font-weight: 500; margin-bottom: 1.5rem;
    }
    .hero-badge i { font-size: 0.75rem; color: var(--clr-accent-light); }
    .hero h1 { color: #fff; font-size: 3.2rem; font-weight: 800; line-height: 1.2; margin-bottom: 1.2rem; }
    .hero h1 span { color: var(--clr-accent-light); }
    .hero p { color: rgba(255,255,255,0.78); font-size: 1.15rem; max-width: 600px; margin-bottom: 2rem; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
    .hero-actions .btn-cta { padding: 0.8rem 2rem; font-size: 1.05rem; border-radius: var(--radius-lg); }
    .hero-actions .btn-outline {
        display: inline-flex; align-items: center; gap: 0.5rem;
        border: 1.5px solid rgba(255,255,255,0.30); color: #fff;
        padding: 0.75rem 1.8rem; border-radius: var(--radius-lg);
        font-weight: 600; font-size: 0.95rem;
        transition: all var(--transition);
    }
    .hero-actions .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.50); color: #fff; }
    .hero-stats {
        display: flex; gap: 2.5rem; margin-top: 2.5rem;
        padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.12);
    }
    .hero-stat { text-align: center; }
    .hero-stat-num { font-size: 1.8rem; font-weight: 800; color: #fff; line-height: 1.2; }
    .hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.60); margin-top: 0.2rem; }

    /* ===== 板块通用 ===== */
    .section { padding: var(--spacer-section) 0; }
    .section-alt { background: var(--clr-bg-alt); }
    .section-dark { background: var(--clr-bg-dark); color: #fff; }
    .section-title { text-align: center; margin-bottom: 3rem; }
    .section-title h2 { margin-bottom: 0.6rem; }
    .section-title p { max-width: 560px; margin: 0 auto; color: var(--clr-text-muted); font-size: 1.05rem; }
    .section-title.light h2 { color: #fff; }
    .section-title.light p { color: rgba(255,255,255,0.65); }

    /* ===== 核心优势 ===== */
    .features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
    .feature-card {
        background: var(--clr-white); border-radius: var(--radius-lg);
        padding: 2.2rem 1.8rem; box-shadow: var(--shadow-sm);
        border: 1px solid var(--clr-border-light);
        transition: all var(--transition); text-align: center;
    }
    .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
    .feature-icon {
        width: 60px; height: 60px; border-radius: var(--radius-md);
        background: rgba(26,58,107,0.08); display: flex; align-items: center; justify-content: center;
        margin: 0 auto 1.2rem; font-size: 1.6rem; color: var(--clr-primary);
        transition: all var(--transition);
    }
    .feature-card:hover .feature-icon { background: var(--clr-primary); color: #fff; }
    .feature-card h3 { margin-bottom: 0.6rem; font-size: 1.2rem; }
    .feature-card p { font-size: 0.95rem; color: var(--clr-text-muted); margin-bottom: 0; }

    /* ===== 分类入口 ===== */
    .category-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.8rem; }
    .category-card {
        position: relative; border-radius: var(--radius-lg); overflow: hidden;
        background: var(--clr-white); box-shadow: var(--shadow-sm);
        border: 1px solid var(--clr-border-light);
        transition: all var(--transition); cursor: pointer;
    }
    .category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
    .category-card img { width: 100%; height: 180px; object-fit: cover; transition: transform 0.4s; }
    .category-card:hover img { transform: scale(1.05); }
    .category-card-body { padding: 1.4rem 1.5rem 1.8rem; }
    .category-card-body h3 { font-size: 1.15rem; margin-bottom: 0.4rem; }
    .category-card-body p { font-size: 0.92rem; color: var(--clr-text-muted); margin-bottom: 0.8rem; }
    .category-tag {
        display: inline-block; background: var(--clr-tag-bg); color: var(--clr-tag-text);
        padding: 0.2rem 0.8rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600;
    }

    /* ===== 资讯列表 ===== */
    .news-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
    .news-item {
        display: flex; gap: 1.2rem; background: var(--clr-white);
        border-radius: var(--radius-md); padding: 1.2rem;
        border: 1px solid var(--clr-border-light); box-shadow: var(--shadow-sm);
        transition: all var(--transition);
    }
    .news-item:hover { box-shadow: var(--shadow-md); border-color: transparent; transform: translateY(-2px); }
    .news-thumb { width: 100px; height: 75px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; background: var(--clr-bg-alt); }
    .news-info { flex: 1; min-width: 0; }
    .news-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .news-info h4 a { color: var(--clr-text); }
    .news-info h4 a:hover { color: var(--clr-primary-light); }
    .news-meta { display: flex; align-items: center; gap: 0.8rem; font-size: 0.8rem; color: var(--clr-text-muted); }
    .news-meta .tag { background: var(--clr-tag-bg); padding: 0.1rem 0.6rem; border-radius: 50px; color: var(--clr-tag-text); }
    .news-empty { grid-column: 1 / -1; text-align: center; padding: 3rem 1rem; color: var(--clr-text-muted); background: var(--clr-white); border-radius: var(--radius-md); border: 1px dashed var(--clr-border); }

    /* ===== 数据统计 ===== */
    .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 2rem; }
    .stat-card {
        text-align: center; background: rgba(255,255,255,0.06);
        border-radius: var(--radius-lg); padding: 2rem 1rem;
        border: 1px solid rgba(255,255,255,0.08);
        transition: all var(--transition);
    }
    .stat-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-2px); }
    .stat-card .num { font-size: 2.6rem; font-weight: 800; color: #fff; line-height: 1.2; }
    .stat-card .label { font-size: 0.92rem; color: rgba(255,255,255,0.60); margin-top: 0.3rem; }
    .stat-card .icon { font-size: 1.6rem; color: var(--clr-accent-light); margin-bottom: 0.6rem; }

    /* ===== 使用流程 ===== */
    .steps-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.8rem; counter-reset: step; }
    .step-card {
        text-align: center; counter-increment: step; position: relative;
        background: var(--clr-white); border-radius: var(--radius-lg);
        padding: 2rem 1.5rem; border: 1px solid var(--clr-border-light);
        box-shadow: var(--shadow-sm); transition: all var(--transition);
    }
    .step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
    .step-card::before {
        content: counter(step); position: absolute; top: -12px; left: 50%;
        transform: translateX(-50%);
        width: 32px; height: 32px; border-radius: 50%;
        background: var(--clr-primary); color: #fff;
        display: flex; align-items: center; justify-content: center;
        font-size: 0.85rem; font-weight: 700;
    }
    .step-card .icon { font-size: 2rem; color: var(--clr-primary); margin-bottom: 1rem; margin-top: 0.5rem; }
    .step-card h4 { margin-bottom: 0.4rem; font-size: 1.05rem; }
    .step-card p { font-size: 0.9rem; color: var(--clr-text-muted); margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-grid { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.8rem; }
    .faq-item { background: var(--clr-white); border-radius: var(--radius-md); border: 1px solid var(--clr-border-light); overflow: hidden; transition: all var(--transition); }
    .faq-item:hover { border-color: var(--clr-border); }
    .faq-question { padding: 1.2rem 1.5rem; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--clr-text); transition: background var(--transition); }
    .faq-question:hover { background: rgba(26,58,107,0.03); }
    .faq-question i { color: var(--clr-accent); transition: transform var(--transition); font-size: 0.85rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer { padding: 0 1.5rem 1.2rem; font-size: 0.95rem; color: var(--clr-text-light); display: none; }
    .faq-item.open .faq-answer { display: block; }

    /* ===== CTA ===== */
    .cta-box {
        background: linear-gradient(135deg, var(--clr-primary-dark) 0%, var(--clr-primary) 100%);
        border-radius: var(--radius-xl); padding: 3.5rem 3rem;
        text-align: center; position: relative; overflow: hidden;
    }
    .cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.08; }
    .cta-box h2 { color: #fff; font-size: 2.2rem; margin-bottom: 0.8rem; position: relative; z-index: 1; }
    .cta-box p { color: rgba(255,255,255,0.70); max-width: 520px; margin: 0 auto 1.8rem; font-size: 1.05rem; position: relative; z-index: 1; }
    .cta-box .btn-cta { font-size: 1.1rem; padding: 0.9rem 2.4rem; border-radius: var(--radius-lg); position: relative; z-index: 1; background: var(--clr-accent); }
    .cta-box .btn-cta:hover { background: var(--clr-accent-light); }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--clr-bg-dark); color: rgba(255,255,255,0.70);
        padding: 3.5rem 0 1.8rem;
    }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; }
    .footer-brand .logo { color: #fff; margin-bottom: 0.8rem; }
    .footer-brand .logo .logo-icon { background: var(--clr-accent); }
    .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.50); max-width: 280px; }
    .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 1rem; }
    .footer-col ul li { margin-bottom: 0.5rem; }
    .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 0.88rem; transition: all var(--transition); }
    .footer-col ul li a:hover { color: var(--clr-accent-light); padding-left: 3px; }
    .footer-bottom {
        margin-top: 2.5rem; padding-top: 1.5rem;
        border-top: 1px solid rgba(255,255,255,0.08);
        display: flex; justify-content: space-between; align-items: center;
        font-size: 0.82rem; color: rgba(255,255,255,0.35);
    }
    .footer-bottom a { color: rgba(255,255,255,0.45); }
    .footer-bottom a:hover { color: var(--clr-accent-light); }

    /* ===== 按钮通用 ===== */
    .btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.6rem 1.5rem; border-radius: var(--radius-md); font-weight: 600; font-size: 0.95rem; transition: all var(--transition); }
    .btn-primary { background: var(--clr-primary); color: var(--clr-white); box-shadow: 0 2px 8px rgba(26,58,107,0.20); }
    .btn-primary:hover { background: var(--clr-primary-light); color: var(--clr-white); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(26,58,107,0.25); }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .features-grid { grid-template-columns: repeat(2,1fr); }
        .category-grid { grid-template-columns: repeat(2,1fr); }
        .stats-grid { grid-template-columns: repeat(2,1fr); }
        .steps-grid { grid-template-columns: repeat(2,1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .hero h1 { font-size: 2.6rem; }
    }

    @media (max-width: 768px) {
        :root { --spacer-section: 3rem; --nav-height: 64px; }
        .main-nav { display: none; }
        .main-nav.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); padding: 1rem; border-bottom: 1px solid var(--clr-border); box-shadow: var(--shadow-md); gap: 0.2rem; }
        .mobile-toggle { display: block; }
        .nav-actions .nav-search { display: none; }
        .nav-actions .btn-cta { padding: 0.5rem 1rem; font-size: 0.82rem; }
        .hero { min-height: 420px; }
        .hero h1 { font-size: 2rem; }
        .hero p { font-size: 1rem; }
        .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
        .hero-stat-num { font-size: 1.4rem; }
        .features-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }
        .news-list { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
        .steps-grid { grid-template-columns: 1fr 1fr; gap: 1.2rem; }
        .footer-grid { grid-template-columns: 1fr; }
        .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
        .cta-box { padding: 2.5rem 1.5rem; }
        .cta-box h2 { font-size: 1.6rem; }
        .section-title h2 { font-size: 1.6rem; }
    }

    @media (max-width: 520px) {
        .hero h1 { font-size: 1.6rem; }
        .hero-actions { flex-direction: column; align-items: stretch; }
        .hero-actions .btn-cta, .hero-actions .btn-outline { text-align: center; justify-content: center; }
        .stats-grid { grid-template-columns: 1fr 1fr; }
        .steps-grid { grid-template-columns: 1fr; }
        .news-item { flex-direction: column; }
        .news-thumb { width: 100%; height: 140px; }
    }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2a4a7f;
            --accent: #f4a261;
            --accent-light: #f7c35c;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #0b1a2e;
            --bg-section-alt: #f1f3f5;
            --text-dark: #111827;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --text-white: #f9fafb;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --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, 0.10);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1240px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text-main);
            background: var(--bg-body);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: var(--text-dark);
            font-weight: 700;
        }

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

        /* ===== Header / Nav (创作者平台风格) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
        }
        .logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
        }
        .logo:hover {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
        }
        .main-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .main-nav a.active:hover {
            background: var(--primary-dark);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-section-alt);
            border-radius: 50px;
            padding: 0 16px;
            height: 40px;
            border: 1px solid var(--border);
            transition: border var(--transition), box-shadow var(--transition);
            width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
        }
        .search-box input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text-main);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            color: var(--text-muted);
            font-size: 1rem;
            padding: 4px 0 4px 8px;
            transition: color var(--transition);
        }
        .search-box button:hover {
            color: var(--primary);
        }
        .btn-header {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .btn-header-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-header-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-header-outline {
            border: 1px solid var(--border);
            color: var(--text-main);
            background: transparent;
        }
        .btn-header-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }
        .menu-toggle {
            display: none;
            font-size: 1.6rem;
            padding: 4px 8px;
            color: var(--text-dark);
            background: none;
            border: none;
            cursor: pointer;
        }

        @media (max-width: 1024px) {
            .search-box {
                width: 140px;
            }
            .btn-header span {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.3s ease;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1.05rem;
            }
            .nav-actions {
                gap: 8px;
            }
            .search-box {
                width: 120px;
            }
            .menu-toggle {
                display: block;
            }
            .btn-header {
                padding: 8px 16px;
            }
        }
        @media (max-width: 520px) {
            .logo {
                font-size: 1.2rem;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .search-box {
                width: 90px;
                padding: 0 10px;
            }
            .search-box input {
                font-size: 0.8rem;
            }
            .btn-header {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
        }

        /* ===== 移动端菜单遮罩 ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.25);
            z-index: 999;
        }
        .nav-overlay.active {
            display: block;
        }

        /* ===== Hero / Banner (分类页首屏) ===== */
        .category-hero {
            padding: 120px 0 72px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 40%, rgba(230, 57, 70, 0.30) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .category-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 50px;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), transform var(--transition);
        }
        .hero-tag:hover {
            background: rgba(255, 255, 255, 0.22);
            transform: translateY(-2px);
            color: #fff;
        }
        .hero-tag i {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 100px 0 52px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .hero-tag {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            padding: 16px 0;
            background: var(--bg-body);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--text-muted);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar span {
            color: var(--text-main);
            font-weight: 500;
        }
        .breadcrumb-bar .sep {
            color: var(--text-light);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .subtitle-accent {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-header.light h2 {
            color: #fff;
        }
        .section-header.light p {
            color: rgba(255, 255, 255, 0.75);
        }

        @media (max-width: 768px) {
            .section {
                padding: 52px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== 分类筛选 tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 40px;
        }
        .filter-tab {
            padding: 8px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-main);
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .filter-tab:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }
        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.30);
        }
        .filter-tab i {
            margin-right: 6px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-section-alt);
            position: relative;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .card-item:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            z-index: 2;
        }
        .card-img .card-tag.green {
            background: #2d6a4f;
        }
        .card-img .card-tag.blue {
            background: var(--secondary);
        }
        .card-img .card-tag.orange {
            background: var(--accent);
        }
        .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-dark);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 0.85rem;
        }
        .card-footer .read-more {
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-footer .read-more:hover {
            color: var(--primary-dark);
        }
        .card-footer .stats {
            display: flex;
            gap: 14px;
            color: var(--text-light);
            font-size: 0.8rem;
        }
        .card-footer .stats i {
            margin-right: 4px;
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .card-body {
                padding: 16px 18px 18px;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
        }

        /* ===== 排行列表 ===== */
        .rank-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .rank-col h3 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rank-col h3 i {
            color: var(--accent);
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }
        .rank-item:last-child {
            border-bottom: none;
        }
        .rank-num {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.85rem;
            background: var(--bg-section-alt);
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num {
            background: var(--primary);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-num {
            background: var(--accent);
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: var(--secondary);
            color: #fff;
        }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info .rank-title {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-dark);
            display: block;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-info .rank-sub {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .rank-value {
            font-weight: 700;
            color: var(--primary);
            font-size: 0.95rem;
        }

        @media (max-width: 768px) {
            .rank-list {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 数据统计块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            backdrop-filter: blur(4px);
            transition: background var(--transition), transform var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 1.6rem;
            color: var(--accent-light);
            margin-bottom: 12px;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .stat-item {
                padding: 20px 12px;
            }
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.85) 30%, rgba(230, 57, 70, 0.25) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
        }
        .btn-cta-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
        }
        .btn-cta-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(230, 57, 70, 0.45);
        }
        .btn-cta-outline {
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            background: transparent;
        }
        .btn-cta-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .btn-cta {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(230, 57, 70, 0.03);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 1.1rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            border-top: 3px solid var(--primary);
        }
        .site-footer .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
            font-size: 1.4rem;
        }
        .footer-brand .logo .logo-icon {
            background: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-block;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .site-footer .container {
                padding: 0 16px;
            }
        }

        /* ===== 通用组件 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.25);
        }
        .btn-outline {
            border: 1px solid var(--border);
            color: var(--text-main);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230, 57, 70, 0.04);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .badge-red {
            background: rgba(230, 57, 70, 0.10);
            color: var(--primary);
        }
        .badge-blue {
            background: rgba(29, 53, 87, 0.10);
            color: var(--secondary);
        }
        .badge-green {
            background: rgba(45, 106, 79, 0.10);
            color: #2d6a4f;
        }
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            :root {
                --header-h: 64px;
            }
        }
        @media (max-width: 768px) {
            .category-hero h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero {
                min-height: 240px;
                padding: 80px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero p {
                font-size: 0.9rem;
            }
            .filter-tabs {
                gap: 6px;
            }
            .filter-tab {
                padding: 6px 16px;
                font-size: 0.8rem;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #0d2137;
    --primary-light: #1a3a5c;
    --primary-dark: #081524;
    --secondary: #e63946;
    --secondary-hover: #c1121f;
    --accent: #f0a500;
    --accent-light: #ffc107;
    --bg-body: #f4f6f9;
    --bg-card: #ffffff;
    --bg-dark: #0d2137;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-light: #6c757d;
    --text-white: #ffffff;
    --border-color: #e8ecf1;
    --border-light: #f0f2f5;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(13,33,55,0.06);
    --shadow-md: 0 6px 20px rgba(13,33,55,0.08);
    --shadow-lg: 0 12px 40px rgba(13,33,55,0.12);
    --shadow-xl: 0 20px 60px rgba(13,33,55,0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, 'Helvetica Neue', sans-serif;
    --max-width: 1200px;
    --header-height: 72px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-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);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
button { cursor: pointer; background: none; }
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}
/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 4px rgba(13,33,55,0.04);
    transition: background var(--transition), box-shadow var(--transition);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.3px;
    flex-shrink: 0;
}
.logo .logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: var(--secondary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    transition: transform var(--transition);
}
.logo:hover .logo-icon { transform: rotate(-8deg) scale(1.05); }
.logo span:last-child { font-weight: 600; }
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}
.main-nav a {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
}
.main-nav a:hover { color: var(--primary); background: rgba(13,33,55,0.06); }
.main-nav a.active {
    color: var(--secondary);
    background: rgba(230,57,70,0.08);
    font-weight: 600;
}
.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--secondary);
    border-radius: 4px;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.search-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: var(--border-light);
    transition: all var(--transition);
    font-size: 1rem;
}
.search-btn:hover { background: var(--border-color); color: var(--primary); }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--secondary);
    color: #fff;
    transition: all var(--transition);
    border: none;
    letter-spacing: 0.3px;
}
.btn-primary:hover { background: var(--secondary-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(230,57,70,0.3); }
.btn-primary i { font-size: 0.85rem; }
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 22px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--primary);
    border: 1.5px solid var(--border-color);
    transition: all var(--transition);
    background: transparent;
}
.btn-outline:hover { border-color: var(--primary); background: rgba(13,33,55,0.04); transform: translateY(-1px); }
.mobile-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; font-size: 1.3rem; color: var(--text-primary); border-radius: var(--radius-sm); background: var(--border-light); }
.mobile-toggle:hover { background: var(--border-color); }
/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
    padding: 16px 0 0;
    background: var(--bg-body);
    margin-top: var(--header-height);
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-light);
    padding: 8px 0;
}
.breadcrumb a { color: var(--text-light); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb .sep { color: #ccc; font-size: 0.75rem; }
.breadcrumb .current { color: var(--text-secondary); font-weight: 500; }
/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    padding: 60px 0 50px;
    background: var(--primary-dark);
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    margin-top: 0;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,33,55,0.88) 0%, rgba(13,33,55,0.72) 100%);
    z-index: 1;
}
.article-hero .container { position: relative; z-index: 2; }
.article-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 16px;
    border-radius: 20px;
    background: rgba(230,57,70,0.2);
    color: var(--accent-light);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    border: 1px solid rgba(240,165,0,0.2);
}
.article-category i { font-size: 0.75rem; }
.article-hero h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.3;
    max-width: 860px;
    margin-bottom: 20px;
    letter-spacing: -0.3px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta i { font-size: 0.8rem; color: var(--accent); }
/* ===== Main Content ===== */
.article-main {
    padding: 50px 0 40px;
    background: var(--bg-body);
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
}
.article-body {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 40px 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}
.article-body .content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-primary);
}
.article-body .content p { margin-bottom: 1.4em; }
.article-body .content h2, .article-body .content h3 {
    font-weight: 600;
    color: var(--primary);
    margin-top: 1.8em;
    margin-bottom: 0.8em;
    line-height: 1.4;
}
.article-body .content h2 { font-size: 1.5rem; }
.article-body .content h3 { font-size: 1.2rem; }
.article-body .content ul, .article-body .content ol {
    margin: 1em 0;
    padding-left: 1.6em;
}
.article-body .content li { margin-bottom: 0.5em; }
.article-body .content ul li { list-style: disc; }
.article-body .content ol li { list-style: decimal; }
.article-body .content blockquote {
    margin: 1.5em 0;
    padding: 16px 24px;
    border-left: 4px solid var(--secondary);
    background: rgba(230,57,70,0.04);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}
.article-body .content img {
    border-radius: var(--radius-sm);
    margin: 1.5em auto;
    box-shadow: var(--shadow-sm);
}
.article-body .content a { color: var(--secondary); text-decoration: underline; }
.article-body .content a:hover { color: var(--secondary-hover); }
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--border-light);
}
.article-tags .tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 20px;
    background: var(--border-light);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition);
}
.article-tags .tag:hover { background: var(--border-color); color: var(--primary); }
.article-tags .tag i { font-size: 0.7rem; color: var(--secondary); }
/* ===== Sidebar ===== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.sidebar-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}
.sidebar-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-card h3 i { color: var(--secondary); font-size: 0.9rem; }
.sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    transition: color var(--transition);
}
.sidebar-list a:hover { color: var(--secondary); }
.sidebar-list .list-date {
    font-size: 0.78rem;
    color: var(--text-light);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.sidebar-list .list-date i { font-size: 0.7rem; }
/* ===== Article Nav (prev/next) ===== */
.article-nav-wrap {
    padding: 30px 0;
    background: var(--bg-body);
}
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}
.article-nav a {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.article-nav a:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--border-color); }
.article-nav .nav-label {
    font-size: 0.8rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}
.article-nav .nav-label i { font-size: 0.75rem; }
.article-nav .nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-nav .nav-next { text-align: right; }
.article-nav .nav-next .nav-label { justify-content: flex-end; }
.article-nav a.disabled { opacity: 0.5; pointer-events: none; }
/* ===== Related Posts ===== */
.related-wrap {
    padding: 40px 0 50px;
    background: var(--bg-body);
}
.related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 12px;
}
.related-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.related-header h2 i { color: var(--secondary); font-size: 1.2rem; }
.related-header a {
    font-size: 0.9rem;
    color: var(--secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}
.related-header a:hover { gap: 10px; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.related-card .card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--border-light);
}
.related-card .card-body { padding: 18px 18px 20px; }
.related-card .card-cat {
    font-size: 0.75rem;
    color: var(--secondary);
    font-weight: 500;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.related-card .card-cat i { font-size: 0.65rem; }
.related-card .card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition);
}
.related-card:hover .card-title { color: var(--secondary); }
.related-card .card-date {
    font-size: 0.78rem;
    color: var(--text-light);
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.related-card .card-date i { font-size: 0.7rem; }
/* ===== CTA Section ===== */
.cta-section {
    padding: 60px 0;
    background: var(--primary-dark);
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    position: relative;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,33,55,0.9) 0%, rgba(13,33,55,0.75) 100%);
    z-index: 1;
}
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 14px;
}
.cta-section p {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.75);
    max-width: 600px;
    margin: 0 auto 28px;
    line-height: 1.7;
}
.cta-section .cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.cta-section .btn-primary {
    padding: 14px 36px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    background: var(--secondary);
}
.cta-section .btn-primary:hover { background: var(--secondary-hover); box-shadow: 0 6px 24px rgba(230,57,70,0.35); }
.cta-section .btn-outline-light {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-white);
    border: 1.5px solid rgba(255,255,255,0.3);
    transition: all var(--transition);
    background: transparent;
}
.cta-section .btn-outline-light:hover { border-color: var(--accent); color: var(--accent); background: rgba(240,165,0,0.08); }
/* ===== Footer ===== */
.site-footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.8);
    padding: 50px 0 0;
    border-top: 3px solid var(--secondary);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 30px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; font-size: 1.4rem; margin-bottom: 12px; display: inline-flex; }
.footer-brand .logo .logo-icon { background: var(--secondary); }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; margin-top: 14px; max-width: 360px; }
.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: 0.3px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--secondary);
    border-radius: 2px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.6);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-col ul a i { font-size: 0.65rem; color: var(--accent); }
.footer-bottom {
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: var(--accent); }
.footer-bottom a:hover { text-decoration: underline; }
/* ===== Not Found ===== */
.not-found-wrap {
    padding: 80px 20px;
    text-align: center;
    background: var(--bg-body);
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.not-found-wrap i { font-size: 3.5rem; color: var(--text-light); margin-bottom: 20px; }
.not-found-wrap h2 { font-size: 1.6rem; color: var(--text-primary); margin-bottom: 12px; }
.not-found-wrap p { color: var(--text-light); margin-bottom: 24px; }
.not-found-wrap a { color: var(--secondary); font-weight: 500; }
.not-found-wrap a:hover { text-decoration: underline; }
/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    :root { --header-height: 64px; }
    .main-nav { display: none; }
    .main-nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); padding: 16px 20px; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-md); gap: 4px; }
    .main-nav.open a { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 1rem; }
    .mobile-toggle { display: flex; }
    .header-actions .btn-outline, .header-actions .btn-primary { display: none; }
    .article-hero { padding: 40px 0 36px; }
    .article-hero h1 { font-size: 1.5rem; }
    .article-body { padding: 24px 20px; }
    .article-body .content { font-size: 1rem; }
    .article-nav { grid-template-columns: 1fr; gap: 12px; }
    .article-sidebar { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .cta-section h2 { font-size: 1.4rem; }
    .cta-section p { font-size: 0.95rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .breadcrumb-wrap { padding: 12px 0 0; }
    .breadcrumb { font-size: 0.78rem; }
}
@media (max-width: 520px) {
    .container { padding: 0 14px; }
    .article-hero h1 { font-size: 1.25rem; }
    .article-meta { gap: 10px; font-size: 0.8rem; flex-wrap: wrap; }
    .article-body { padding: 18px 14px; border-radius: var(--radius-sm); }
    .article-body .content h2 { font-size: 1.2rem; }
    .article-body .content h3 { font-size: 1.05rem; }
    .related-card .card-img { height: 160px; }
    .cta-section { padding: 40px 0; }
    .cta-section .btn-primary, .cta-section .btn-outline-light { width: 100%; justify-content: center; }
    .footer-grid { gap: 20px; }
}