/* roulang page: index */
:root {
  --primary: #1a4fd8;
  --primary-dark: #0f3188;
  --accent: #f59e0b;
  --bg: #f8fafc;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 1rem;
  --shadow: 0 10px 30px rgba(15, 49, 136, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 49, 136, 0.15);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.nav-blur { backdrop-filter: blur(20px); background: rgba(255,255,255,0.85); }
.hero-bg {
  background-image: linear-gradient(rgba(6,21,56,0.7), rgba(6,21,56,0.55)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}
.card-hover { transition: transform 0.4s ease, box-shadow 0.4s ease; }
.card-hover:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #10b981 100%);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(26,79,216,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(26,79,216,0.4); }
.btn-outline {
  border: 2px solid rgba(255,255,255,0.7);
  color: #fff;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.nav-link { position: relative; padding: 8px 4px; font-weight: 500; color: #334155; }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-link:hover { color: var(--primary); }
.section-pad { padding: 96px 0; }
.faq-item { border: 1px solid var(--border); border-radius: 12px; background: #fff; overflow: hidden; }
.faq-item summary { padding: 20px 24px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--primary); transition: transform 0.3s; }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .faq-body { padding: 0 24px 20px; color: var(--text-light); }
.article-content { font-size: 16px; line-height: 1.9; }
.article-content h2 { font-size: 1.6rem; margin: 32px 0 16px; color: var(--text); border-left: 4px solid var(--primary); padding-left: 16px; }
.article-content p { margin-bottom: 16px; color: #475569; }
.article-content ul, .article-content ol { margin: 16px 0; padding-left: 24px; color: #475569; }
.article-content li { margin-bottom: 8px; }
.article-content img { border-radius: 12px; margin: 24px 0; }
.article-content a { color: var(--primary); font-weight: 500; }
.article-content a:hover { text-decoration: underline; }
.mobile-menu { display: none; }
@media (max-width: 768px) {
  .section-pad { padding: 60px 0; }
  .desktop-nav { display: none; }
  .mobile-menu { display: flex; align-items: center; }
  .mobile-menu-btn { font-size: 24px; color: var(--text); }
  .mobile-nav-panel { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(255,255,255,0.98); z-index: 50; padding: 24px; transform: translateX(-100%); transition: transform 0.4s ease; }
  .mobile-nav-panel.open { transform: translateX(0); }
  .mobile-nav-panel .nav-close { font-size: 28px; color: var(--text); position: absolute; top: 20px; right: 24px; }
  .mobile-nav-panel a { display: block; padding: 16px 0; font-size: 18px; font-weight: 500; border-bottom: 1px solid var(--border); }
  .hero-bg { background-attachment: scroll; }
}
input:focus, button:focus, a:focus { outline: 3px solid rgba(26,79,216,0.3); outline-offset: 2px; }
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  h1 { font-size: 28px !important; }
  h2 { font-size: 24px !important; }
  .btn-primary, .btn-outline { padding: 12px 24px; }
}
.animate-fade-in { animation: fadeIn 0.8s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(26,79,216,0.1);
  color: var(--primary);
}
.stat-card { background: #fff; border-radius: var(--radius); padding: 32px; text-align: center; border: 1px solid var(--border); }
.stat-card .number { font-size: 2.5rem; font-weight: 700; color: var(--primary); }
.stat-card .label { color: var(--text-light); margin-top: 4px; font-weight: 500; }
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; width: 2px; height: 100%; background: linear-gradient(to bottom, var(--primary), var(--accent)); }
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-item::before { content: ''; position: absolute; left: -38px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 4px rgba(26,79,216,0.2); }
.timeline-item h4 { font-weight: 600; color: var(--text); margin-bottom: 4px; }
.timeline-item p { color: var(--text-light); font-size: 14px; }

/* roulang page: category1 */
:root {
            --brand-700: #1757e1;
            --brand-800: #1a47b6;
            --brand-900: #1c3f8f;
            --accent-400: #ffbe5c;
            --accent-500: #f7a325;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --shadow-card: 0 10px 40px rgba(23, 87, 225, 0.08);
            --shadow-hover: 0 20px 50px rgba(23, 87, 225, 0.14);
            --transition-base: all 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background: #f8fafc;
            line-height: 1.7;
            padding-top: 80px;
        }

        * {
            box-sizing: border-box;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }

        .container {
            width: 100%;
            max-width: 1180px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .nav-blur {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: #334155;
            padding: 0.5rem 0.2rem;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--brand-700);
        }

        .nav-link.active {
            color: var(--brand-700);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--brand-700), var(--accent-500));
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--brand-700);
            color: #fff;
            font-weight: 600;
            border-radius: 999px;
            padding: 0.8rem 1.8rem;
            box-shadow: 0 8px 24px rgba(23, 87, 225, 0.28);
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--brand-800);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(23, 87, 225, 0.34);
        }

        .btn-primary:focus-visible,
        .btn-outline:focus-visible {
            outline: 3px solid rgba(23, 87, 225, 0.5);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            border-radius: 999px;
            padding: 0.8rem 1.8rem;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        .card-item {
            background: #fff;
            border: 1px solid rgba(226, 232, 240, 0.8);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .card-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(23, 87, 225, 0.2);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--brand-700);
            background: rgba(23, 87, 225, 0.08);
            padding: 0.35rem 1rem;
            border-radius: 999px;
        }

        .badge-step {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            background: linear-gradient(135deg, var(--brand-700), var(--accent-500));
            color: #fff;
            flex-shrink: 0;
        }

        .safety-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 1.6rem;
            transition: var(--transition-base);
        }

        .safety-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(23, 87, 225, 0.25);
            box-shadow: var(--shadow-card);
        }

        .faq-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.2rem 1.5rem;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .faq-btn:hover {
            color: var(--brand-700);
        }

        .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #f1f5f9;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition-base);
            color: var(--brand-700);
            font-size: 0.9rem;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--brand-700);
            color: #fff;
        }

        .faq-answer {
            display: none;
            padding: 0 1.5rem 1.4rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--brand-900) 0%, #0f2a6e 60%, #1a3f9e 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 460px;
            height: 460px;
            border-radius: 50%;
            background: rgba(247, 163, 37, 0.15);
            filter: blur(60px);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(23, 87, 225, 0.4);
            filter: blur(70px);
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu-btn {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: #f1f5f9;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .mobile-menu-btn:hover {
            background: #eef2ff;
            color: var(--brand-700);
        }

        .mobile-nav-panel {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border-color);
            padding: 1rem 1.5rem 1.4rem;
            box-shadow: 0 20px 30px rgba(15, 23, 42, 0.08);
        }

        .mobile-nav-panel.open {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .mobile-nav-panel a {
            padding: 0.75rem 0.5rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 10px;
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--brand-700);
            background: rgba(23, 87, 225, 0.05);
        }

        .entry-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            background: linear-gradient(135deg, rgba(23, 87, 225, 0.1), rgba(247, 163, 37, 0.1));
            color: var(--brand-700);
        }

        .hero-stats {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            margin-top: 2.5rem;
            padding-top: 2rem;
        }

        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu {
                display: flex;
            }
            .mobile-nav-panel.open {
                display: flex;
            }
        }

        @media (min-width: 1024px) {
            .mobile-nav-panel {
                display: none !important;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            body {
                padding-top: 72px;
            }
            .hero-title {
                font-size: 1.7rem !important;
                line-height: 1.4 !important;
            }
        }

        .cover-img {
            border-radius: var(--radius-md);
            object-fit: cover;
            width: 100%;
            height: 100%;
        }

        .topic-card {
            overflow: hidden;
            border-radius: var(--radius-lg);
            background: #fff;
            border: 1px solid rgba(226, 232, 240, 0.8);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        footer a {
            transition: color 0.25s ease;
        }

        footer a:hover {
            color: var(--accent-300) !important;
        }

/* roulang page: article */
:root {
    --brand-700: #0f766e;
    --brand-800: #115e59;
    --brand-900: #134e4a;
    --accent-300: #fcd34d;
    --accent-400: #fbbf24;
    --accent-500: #f59e0b;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-page: #f8fafc;
    --border-light: #e2e8f0;
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.08);
    --shadow-hover: 0 12px 36px rgba(15, 23, 42, 0.14);
    --radius-card: 1.25rem;
    --radius-btn: 0.75rem;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text-main);
    background: var(--bg-page);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; cursor: pointer; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }

  /* 导航 */
  .nav-blur {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    transition: box-shadow 0.3s ease;
  }
  .nav-blur.scrolled { box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08); }
  .nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: #475569;
    padding: 0.4rem 0.1rem;
    position: relative;
    transition: color 0.2s ease;
    white-space: nowrap;
  }
  .nav-link:hover { color: var(--brand-700); }
  .nav-link.active { color: var(--brand-700); font-weight: 600; }
  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 0; bottom: -2px;
    width: 100%; height: 2px;
    background: var(--brand-700);
    border-radius: 2px;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-700);
    color: #fff !important;
    font-weight: 500;
    border-radius: var(--radius-btn);
    padding: 0.7rem 1.4rem;
    transition: all 0.25s ease;
    box-shadow: 0 2px 14px rgba(15, 118, 110, 0.28);
    border: none;
    white-space: nowrap;
  }
  .btn-primary:hover {
    background: var(--brand-900);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 118, 110, 0.3);
  }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(15, 118, 110, 0.25); }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--brand-700) !important;
    border: 2px solid var(--brand-700);
    font-weight: 500;
    border-radius: var(--radius-btn);
    padding: 0.65rem 1.4rem;
    transition: all 0.25s ease;
  }
  .btn-outline:hover { background: rgba(15, 118, 110, 0.06); transform: translateY(-2px); }
  .mobile-menu { display: none; }
  .mobile-menu-btn {
    width: 44px; height: 44px;
    border-radius: 0.75rem;
    border: 1px solid var(--border-light);
    background: #fff;
    color: var(--brand-700);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
  }
  .mobile-menu-btn:hover { border-color: var(--brand-700); }
  .desktop-nav { display: flex; align-items: center; gap: 2rem; }

  /* 文章 Hero */
  .article-hero {
    position: relative;
    background: var(--brand-900);
    padding: 9rem 0 5rem;
    overflow: hidden;
  }
  .article-hero .hero-bg {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.22;
  }
  .article-hero .hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(19, 78, 74, 0.95) 0%, rgba(15, 118, 110, 0.75) 100%);
  }

  /* 面包屑 */
  .breadcrumb { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; font-size: 0.875rem; color: var(--text-muted); }
  .breadcrumb a { transition: color 0.2s; }
  .breadcrumb a:hover { color: var(--brand-700); }

  /* 正文文章 */
  .article-body { font-size: 1.0625rem; line-height: 1.9; color: #334155; }
  .article-body h2 {
    font-size: 1.5rem; font-weight: 700; color: #1e293b;
    margin-top: 2.2rem; margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid #f1f5f9;
  }
  .article-body h3 { font-size: 1.25rem; font-weight: 600; color: #1e293b; margin-top: 1.6rem; margin-bottom: 0.8rem; }
  .article-body p { margin-bottom: 1.4rem; }
  .article-body ul, .article-body ol { margin-bottom: 1.4rem; padding-left: 1.5rem; }
  .article-body ul { list-style: disc; }
  .article-body ol { list-style: decimal; }
  .article-body li { margin-bottom: 0.45rem; }
  .article-body a { color: var(--brand-700); text-decoration: underline; text-underline-offset: 3px; }
  .article-body a:hover { color: var(--brand-900); }
  .article-body img { border-radius: 1rem; margin: 1.5rem 0; }
  .article-body blockquote {
    border-left: 4px solid var(--brand-700);
    background: #f0fdfa;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 0.75rem 0.75rem 0;
    color: #475569;
  }
  .article-body code {
    background: #f1f5f9;
    padding: 0.2rem 0.45rem;
    border-radius: 0.375rem;
    font-size: 0.9em;
  }

  /* 侧边栏卡片 */
  .side-card {
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 1.75rem;
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: box-shadow 0.3s ease;
  }
  .side-card:hover { box-shadow: var(--shadow-hover); }

  /* 标签 */
  .tag-chip {
    display: inline-block;
    background: #f0fdfa;
    color: var(--brand-700);
    border-radius: 999px;
    padding: 0.25rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(15, 118, 110, 0.12);
    transition: all 0.2s;
  }
  .tag-chip:hover { background: var(--brand-700); color: #fff; }

  /* 数据卡 */
  .stat-card {
    background: linear-gradient(135deg, #f0fdfa 0%, #f8fafc 100%);
    border: 1px solid rgba(15, 118, 110, 0.08);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
  }
  .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

  /* FAQ */
  .faq-item {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: 1rem;
    padding: 1.5rem 1.75rem;
    transition: all 0.25s ease;
    cursor: pointer;
  }
  .faq-item:hover { border-color: rgba(15, 118, 110, 0.3); box-shadow: var(--shadow-card); }
  .faq-item.active { border-color: var(--brand-700); box-shadow: 0 4px 20px rgba(15, 118, 110, 0.1); }
  .faq-item .faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
  .faq-item.active .faq-a { max-height: 400px; }

  /* CTA */
  .cta-section {
    position: relative;
    border-radius: 1.5rem;
    overflow: hidden;
    padding: 3rem 3rem;
  }
  .cta-section .cta-bg {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
  }
  .cta-section .cta-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(19, 78, 74, 0.94) 0%, rgba(15, 118, 110, 0.82) 100%);
  }

  /* 底部 */
  .footer-link { transition: color 0.2s ease, padding-left 0.2s ease; }
  .footer-link:hover { color: #fcd34d !important; padding-left: 4px; }

  /* 焦点 */
  a:focus-visible, button:focus-visible {
    outline: 3px solid rgba(245, 158, 11, 0.5);
    outline-offset: 2px;
    border-radius: 0.25rem;
  }

  /* 响应式 */
  @media (max-width: 1024px) {
    .desktop-nav {
      display: none;
      position: fixed;
      top: 80px;
      left: 1rem;
      right: 1rem;
      background: #fff;
      flex-direction: column;
      padding: 1.5rem 1.75rem;
      border-radius: 1rem;
      box-shadow: 0 20px 48px rgba(15, 23, 42, 0.18);
      gap: 0.5rem;
      z-index: 100;
      border: 1px solid var(--border-light);
    }
    .desktop-nav.mobile-open { display: flex; }
    .desktop-nav .nav-link { font-size: 1rem; padding: 0.6rem 0; border-bottom: 1px solid #f1f5f9; width: 100%; }
    .desktop-nav .btn-primary { margin-top: 0.75rem; width: 100%; }
    .mobile-menu { display: block; }
    .cta-section { padding: 2.5rem 1.5rem; }
  }
  @media (max-width: 640px) {
    .article-hero { padding: 7rem 0 3.5rem; }
    .article-hero h1 { font-size: 1.75rem !important; }
    .side-card { padding: 1.25rem; }
  }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --brand-50: #eff6ff;
            --brand-100: #dbeafe;
            --brand-200: #bfdbfe;
            --brand-300: #93c5fd;
            --brand-400: #60a5fa;
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --brand-800: #1e40af;
            --brand-900: #0f2a6f;
            --accent-300: #fcd34d;
            --accent-400: #fbbf24;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --bg-soft: #f8fafc;
            --border-color: #e2e8f0;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(15, 42, 111, 0.06), 0 8px 24px rgba(15, 42, 111, 0.06);
            --shadow-hover: 0 4px 12px rgba(15, 42, 111, 0.10), 0 16px 32px rgba(15, 42, 111, 0.10);
        }

        /* ===== 基础 Reset ===== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.75;
            color: var(--text-main);
            background: #fff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .nav-blur {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 0.5rem 0.25rem;
            border-bottom: 2px solid transparent;
            transition: color 0.2s, border-color 0.2s;
        }

        .nav-link:hover {
            color: var(--brand-700);
            border-bottom-color: var(--brand-400);
        }

        .nav-link.active {
            color: var(--brand-700);
            border-bottom-color: var(--brand-600);
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-700);
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.75rem 1.5rem;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
            box-shadow: 0 2px 8px rgba(29, 78, 216, 0.3);
        }

        .btn-primary:hover {
            background: var(--brand-800);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(29, 78, 216, 0.35);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--brand-300);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.75rem 1.5rem;
            transition: background 0.2s, border-color 0.2s, transform 0.15s;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu-btn {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.65rem;
            background: var(--bg-soft);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-size: 1.1rem;
        }

        .mobile-panel {
            display: none;
            position: fixed;
            top: 80px;
            left: 0;
            right: 0;
            background: #fff;
            z-index: 45;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 16px 32px rgba(15, 42, 111, 0.12);
            padding: 1rem 0;
        }

        .mobile-panel.open {
            display: block;
        }

        .mobile-panel a {
            display: block;
            padding: 0.8rem 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-main);
            border-left: 3px solid transparent;
        }

        .mobile-panel a.active {
            color: var(--brand-700);
            border-left-color: var(--brand-600);
            background: var(--brand-50);
        }

        .mobile-panel a:hover {
            background: var(--bg-soft);
        }

        @media (max-width: 900px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu {
                display: block;
            }
        }

        /* ===== Hero 区域 ===== */
        .category-hero {
            position: relative;
            background-image: linear-gradient(135deg, rgba(15, 42, 111, 0.92) 0%, rgba(29, 78, 216, 0.82) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 180px 0 100px;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, #fff, transparent);
        }

        .category-hero .hero-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            margin-bottom: 1.5rem;
        }

        .category-hero h1 {
            font-size: 3.5rem;
            line-height: 1.2;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }

        .category-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 150px 0 72px;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .category-hero p {
                font-size: 1.05rem;
            }
        }

        /* ===== 通用板块容器 ===== */
        .section-padding {
            padding: 80px 0;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 52px 0;
            }
        }

        .section-head-center {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand-600);
            background: var(--brand-50);
            border: 1px solid var(--brand-100);
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 750;
            color: #0f172a;
            letter-spacing: -0.015em;
            line-height: 1.3;
            margin-bottom: 1rem;
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-weak);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
        }

        /* ===== 卡片 ===== */
        .review-card {
            background: #fff;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow 0.3s, transform 0.3s;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .review-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }

        .review-card .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .review-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .review-card:hover .card-image img {
            transform: scale(1.05);
        }

        .review-card .card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 42, 111, 0.3), transparent 60%);
        }

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.95);
            color: var(--brand-700);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(4px);
        }

        .card-rating {
            position: absolute;
            bottom: 14px;
            right: 14px;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(15, 42, 111, 0.85);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.82rem;
            font-weight: 700;
            padding: 0.25rem 0.65rem;
            border-radius: 999px;
        }

        .card-content {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #0f172a;
            line-height: 1.4;
            margin-bottom: 0.75rem;
        }

        .card-content p {
            font-size: 0.93rem;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 1.25rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-weak);
            font-size: 0.82rem;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-600);
            font-weight: 600;
            font-size: 0.88rem;
            transition: gap 0.2s;
        }

        .card-link:hover {
            gap: 10px;
            color: var(--brand-800);
        }

        /* ===== 统计卡 ===== */
        .stat-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s, box-shadow 0.25s;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .stat-card .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--brand-700);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-card .stat-label {
            font-size: 0.92rem;
            color: var(--text-weak);
            margin-top: 0.5rem;
            font-weight: 500;
        }

        .stat-card .stat-icon {
            width: 52px;
            height: 52px;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin: 0 auto 1rem;
            background: var(--brand-50);
            color: var(--brand-600);
        }

        /* ===== 资源列表 ===== */
        .resource-item {
            display: flex;
            gap: 1.5rem;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 1.4rem;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.25s, transform 0.25s;
            height: 100%;
        }

        .resource-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .resource-item .resource-thumb {
            width: 120px;
            height: 90px;
            flex-shrink: 0;
            border-radius: 0.85rem;
            overflow: hidden;
        }

        .resource-item .resource-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .resource-item .resource-body {
            flex: 1;
        }

        .resource-item .resource-type {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent-600);
            background: #fffbeb;
            border: 1px solid #fde68a;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            letter-spacing: 0.03em;
        }

        .resource-item h3 {
            font-size: 1rem;
            font-weight: 700;
            color: #0f172a;
            margin: 0.5rem 0 0.35rem;
            line-height: 1.4;
        }

        .resource-item p {
            font-size: 0.86rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .resource-item .resource-update {
            font-size: 0.75rem;
            color: #94a3b8;
            margin-top: 0.45rem;
        }

        @media (max-width: 640px) {
            .resource-item {
                flex-direction: column;
            }
            .resource-item .resource-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ===== 深色流程区 ===== */
        .process-section {
            background: linear-gradient(135deg, #0f2a6f 0%, #1e40af 100%);
            position: relative;
            overflow: hidden;
        }

        .process-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .process-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }

        .process-card {
            position: relative;
            z-index: 1;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-xl);
            padding: 2rem 1.75rem;
            text-align: center;
            transition: background 0.3s, transform 0.3s;
        }

        .process-card:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-5px);
        }

        .process-card .process-num {
            display: inline-flex;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-500);
            color: var(--brand-900);
            font-weight: 800;
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
        }

        .process-card h3 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        .process-card p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        /* ===== 内容列表 ===== */
        .latest-item {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            padding: 1.4rem 1.5rem;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: box-shadow 0.25s, border-color 0.25s;
        }

        .latest-item:hover {
            box-shadow: var(--shadow-card);
            border-color: var(--brand-200);
        }

        .latest-item .latest-icon {
            width: 46px;
            height: 46px;
            flex-shrink: 0;
            border-radius: 0.8rem;
            background: var(--brand-50);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }

        .latest-item .latest-body {
            flex: 1;
        }

        .latest-item .latest-body h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #0f172a;
            line-height: 1.4;
            margin-bottom: 0.25rem;
            transition: color 0.2s;
        }

        .latest-item:hover .latest-body h3 {
            color: var(--brand-700);
        }

        .latest-item .latest-body p {
            font-size: 0.86rem;
            color: var(--text-weak);
            line-height: 1.6;
        }

        .latest-item .latest-date {
            font-size: 0.75rem;
            color: #94a3b8;
            white-space: nowrap;
            flex-shrink: 0;
            background: var(--bg-soft);
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 0.85rem;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-item:hover {
            border-color: var(--brand-200);
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: #0f172a;
            cursor: pointer;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-arrow {
            color: var(--brand-500);
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-weak);
            font-size: 0.93rem;
            line-height: 1.8;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: linear-gradient(135deg, #1e40af 0%, #0f2a6f 100%);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: -0.015em;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 2rem;
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 0.3rem 0.8rem;
            border-radius: 999px;
            background: var(--brand-50);
            color: var(--brand-700);
            border: 1px solid var(--brand-100);
        }

        .badge-accent {
            background: #fffbeb;
            color: var(--accent-600);
            border-color: #fde68a;
        }

        /* ===== 页脚 ===== */
        footer a {
            transition: color 0.2s;
        }

        footer a:hover {
            color: var(--accent-300);
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid var(--brand-300);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 动画入场（轻微） ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-up {
            animation: fadeUp 0.6s ease-out both;
        }