/* roulang page: index */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    /* 顶部导航与时间线活动状态 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .stage-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .stage-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    /* Hero：路线图预告与版本节点条 */
    .hero-section {
      position: relative;
      background: linear-gradient(rgba(15, 43, 72, 0.88), rgba(15, 43, 72, 0.94)), url('/assets/images/9b15dff3afb560f4.webp') center/cover no-repeat;
      color: #ffffff;
      padding: 80px 0 60px;
    }
    .hero-content {
      max-width: 860px;
    }
    .version-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 4px 12px;
      background: rgba(0, 180, 216, 0.15);
      border: 1px solid var(--accent-cyan);
      border-radius: 20px;
      color: var(--accent-cyan);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      font-size: 1.05rem;
      line-height: 1.8;
      color: #cbd5e1;
      margin-bottom: 36px;
    }

    /* 路线图节点进度条 */
    .roadmap-timeline-bar {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px;
      margin-bottom: 36px;
    }
    .roadmap-nodes {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .node-item {
      position: relative;
      padding-left: 20px;
      border-left: 2px solid var(--accent-cyan);
    }
    .node-phase {
      font-size: 0.75rem;
      color: var(--accent-cyan);
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 4px;
    }
    .node-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: #ffffff;
    }
    .node-desc {
      font-size: 0.8rem;
      color: #94a3b8;
      margin-top: 4px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }
    .btn-accent {
      background: var(--accent-cyan);
      color: #0f172a;
    }
    .btn-accent:hover {
      background: #38bdf8;
      box-shadow: 0 4px 12px rgba(0, 180, 216, 0.4);
    }
    .btn-outline {
      background: transparent;
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.3);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #ffffff;
    }

    /* 通用板块与排版 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 40px;
      max-width: 800px;
    }
    .section-header.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: -0.3px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 网格与卡片 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 检查项列表 (Checklist) */
    .checklist-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .check-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .check-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      background: #dcfce7;
      color: #15803d;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
    }

    /* 合规徽章墙 */
    .compliance-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .badge-card {
      border: 1px dashed var(--border-color);
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
    }
    .badge-tag {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary-accent);
      margin-bottom: 8px;
    }

    /* 边界与严苛规格列表 */
    .boundary-table-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .spec-table th, .spec-table td {
      padding: 14px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    .spec-table th {
      background: var(--bg-subtle);
      color: var(--primary);
      font-weight: 600;
    }

    /* 资讯展示 */
    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-img {
      height: 180px;
      object-fit: cover;
      width: 100%;
    }
    .news-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 0.8rem;
      color: #94a3b8;
      margin-bottom: 8px;
    }

    /* 信任背书与实验室指标 */
    .lab-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }
    .lab-stat-item {
      text-align: center;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
    }
    .lab-stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-accent);
      margin-bottom: 6px;
    }
    .lab-stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴条目 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .faq-question {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .faq-answer {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 单一行动收口 */
    .cta-banner {
      background: var(--primary);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 48px;
      text-align: center;
    }
    .cta-banner h2 {
      font-size: 1.85rem;
      margin-bottom: 16px;
    }
    .cta-banner p {
      color: #cbd5e1;
      max-width: 680px;
      margin: 0 auto 28px;
      font-size: 1rem;
    }

    /* 页脚 */
    .site-footer {
      background: #091a2c;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .grid-4, .compliance-matrix, .lab-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .roadmap-nodes {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .grid-3, .grid-2, .checklist-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .roadmap-nodes {
        grid-template-columns: 1fr;
      }
      .timeline-chips {
        display: none;
      }
      .cta-banner {
        padding: 32px 20px;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .stage-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .stage-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    /* 文档中心版式 Hero */
    .doc-hero {
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-subtle) 100%);
      padding: 56px 0 40px;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .doc-hero-badge {
      display: inline-block;
      padding: 4px 14px;
      background: #e0f2fe;
      color: #0284c7;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 16px;
    }
    .doc-hero-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .doc-hero-lead {
      max-width: 760px;
      margin: 0 auto 30px;
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.7;
    }
    .doc-search-box {
      max-width: 620px;
      margin: 0 auto 20px;
      display: flex;
      align-items: center;
      background: var(--bg-surface);
      border: 1px solid #cbd5e1;
      border-radius: 50px;
      padding: 6px 8px 6px 20px;
      box-shadow: var(--shadow-sm);
    }
    .doc-search-input {
      flex: 1;
      border: none;
      outline: none;
      font-size: 0.95rem;
      color: var(--text-main);
      background: transparent;
    }
    .doc-search-btn {
      background: var(--primary-accent);
      color: #ffffff;
      border: none;
      border-radius: 40px;
      padding: 10px 24px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .doc-search-btn:hover {
      background: #0052a3;
    }
    .doc-hot-chips {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .chip-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 16px;
      color: var(--text-main);
      font-weight: 500;
      transition: var(--transition);
    }
    .chip-item:hover {
      border-color: var(--primary-accent);
      color: var(--primary-accent);
    }

    /* 板块结构 */
    .section-block {
      padding: 64px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
    }
    .section-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

    /* 频段选型表格 */
    .spec-table-wrap {
      overflow-x: auto;
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .spec-table th {
      background: #f8fafc;
      padding: 14px 18px;
      font-weight: 600;
      color: var(--primary);
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }
    .spec-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .spec-table tr:hover td {
      background: #f1f5f9;
    }
    .table-tag {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
      background: #e2e8f0;
      color: #334155;
    }
    .tag-blue { background: #e0f2fe; color: #0284c7; }
    .tag-emerald { background: #dcfce7; color: #15803d; }
    .tag-amber { background: #fef3c7; color: #b45309; }

    /* 网格与非对称布局 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }
    .card-num {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary-accent);
      margin-bottom: 12px;
      display: inline-block;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex: 1;
    }

    .matrix-item {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px;
      border-top: 3px solid var(--primary-accent);
    }
    .matrix-item h4 {
      font-size: 1.05rem;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .matrix-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 图片图文交替 */
    .img-showcase {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    /* 常见疑问折叠模拟 */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .faq-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
    }
    .faq-q {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .faq-q::before {
      content: "Q";
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--primary-accent);
      background: #e0f2fe;
      width: 22px;
      height: 22px;
      text-align: center;
      line-height: 22px;
      border-radius: 4px;
    }
    .faq-a {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #091a2b;
      color: #94a3b8;
      padding: 60px 0 24px;
      border-top: 1px solid #1e3a5f;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid #1e3a5f;
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
    }

    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-wrapper { flex-wrap: wrap; height: auto; padding: 12px 0; }
      .timeline-chips { display: none; }
      .grid-2, .grid-3, .grid-4, .faq-grid, .footer-grid { grid-template-columns: 1fr; }
      .doc-hero-title { font-size: 1.6rem; }
    }

/* roulang page: category1 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-md);
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .stage-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .stage-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .page-hero {
      position: relative;
      background: linear-gradient(rgba(15, 43, 72, 0.9), rgba(15, 43, 72, 0.95)), url('/assets/images/488b9ce8ef1a8a3b.webp') center/cover no-repeat;
      color: #ffffff;
      padding: 65px 0 55px;
    }
    .hero-pretitle {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent-cyan);
      background: rgba(0, 180, 216, 0.15);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 16px;
    }
    .page-hero h1 {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 18px;
    }
    .page-hero p {
      font-size: 1.05rem;
      color: #cbd5e1;
      max-width: 820px;
      line-height: 1.75;
    }
    .hero-nodes {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 36px;
      border-top: 1px solid rgba(255,255,255,0.15);
      padding-top: 24px;
    }
    .node-metric {
      border-left: 2px solid var(--accent-cyan);
      padding-left: 12px;
    }
    .node-val {
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
    }
    .node-label {
      font-size: 0.8rem;
      color: #94a3b8;
    }
    .section-block {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
      max-width: 850px;
    }
    .badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }
    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--primary);
    }
    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .feature-list {
      list-style: none;
      margin-top: 14px;
    }
    .feature-list li {
      position: relative;
      padding-left: 18px;
      font-size: 0.88rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .feature-list li::before {
      content: "•";
      position: absolute;
      left: 0;
      color: var(--primary-accent);
      font-size: 1.2rem;
      line-height: 1;
    }
    .data-table-wrap {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: var(--bg-surface);
    }
    .tech-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .tech-table th {
      background: var(--bg-subtle);
      color: var(--primary);
      padding: 14px 16px;
      font-weight: 600;
      border-bottom: 1px solid var(--border-color);
    }
    .tech-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
    }
    .tech-table tr:last-child td {
      border-bottom: none;
    }
    .spec-tag {
      font-family: monospace;
      background: #eff6ff;
      color: #1d4ed8;
      padding: 2px 6px;
      border-radius: 4px;
      font-size: 0.85rem;
    }
    .timeline-stream {
      border-left: 2px solid #cbd5e1;
      margin-left: 10px;
      padding-left: 24px;
      display: flex;
      flex-direction: column;
      gap: 28px;
    }
    .stream-item {
      position: relative;
    }
    .stream-item::before {
      content: "";
      position: absolute;
      left: -31px;
      top: 6px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary-accent);
      border: 3px solid var(--bg-page);
    }
    .stream-heading {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stream-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .site-footer {
      background: #0b1a2c;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
      font-size: 0.88rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      text-align: center;
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 24px;
      font-size: 0.82rem;
    }
    @media (max-width: 1024px) {
      .hero-nodes {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .grid-2, .grid-3 {
        grid-template-columns: 1fr;
      }
      .timeline-chips {
        display: none;
      }
      .nav-wrapper {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .page-hero h1 {
        font-size: 1.65rem;
      }
    }

/* roulang page: category4 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航与时间线活动状态 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .stage-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .stage-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    /* Hero 板块：应用方案发布与配置概览 */
    .hero-subpage {
      background: linear-gradient(135deg, rgba(15, 43, 72, 0.95) 0%, rgba(20, 60, 95, 0.92) 100%), url('/assets/images/488b9ce8ef1a8a3b.webp') center/cover no-repeat;
      color: #ffffff;
      padding: 70px 0 55px;
      border-bottom: 3px solid var(--accent-cyan);
    }
    .hero-layout {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 40px;
      align-items: center;
    }
    .hero-tagline {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 180, 216, 0.2);
      border: 1px solid var(--accent-cyan);
      border-radius: 20px;
      color: var(--accent-cyan);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .hero-subpage h1 {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 18px;
    }
    .hero-subpage p {
      color: #cbd5e1;
      font-size: 1rem;
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .hero-quick-specs {
      display: flex;
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 20px;
    }
    .spec-item-val {
      font-size: 1.3rem;
      font-weight: 700;
      color: #38bdf8;
    }
    .spec-item-label {
      font-size: 0.8rem;
      color: #94a3b8;
    }
    .hero-panel-card {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      padding: 24px;
      border-radius: var(--radius-md);
    }
    .hero-panel-card h3 {
      font-size: 1.1rem;
      margin-bottom: 14px;
      color: #ffffff;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
      padding-bottom: 8px;
    }
    .panel-list {
      list-style: none;
      font-size: 0.88rem;
      color: #e2e8f0;
    }
    .panel-list li {
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding-bottom: 6px;
    }
    .panel-list span.highlight {
      color: var(--accent-cyan);
      font-weight: 600;
    }
    /* 通用板块与排版 */
    .section-block {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
      max-width: 840px;
    }
    .section-header.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 10px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* 网格卡片与布局 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }
    .card-title {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--primary);
    }
    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .app-scheme-card {
      display: flex;
      flex-direction: column;
      overflow: hidden;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      background: var(--bg-surface);
    }
    .app-scheme-card img {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }
    .app-scheme-body {
      padding: 20px;
      flex: 1;
    }
    .app-scheme-meta {
      display: flex;
      gap: 8px;
      margin-bottom: 10px;
    }
    .scheme-tag {
      font-size: 0.75rem;
      background: var(--bg-subtle);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 500;
    }
    /* 技术架构对比与参数卡 */
    .metric-table-wrap {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
    }
    table.custom-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      text-align: left;
    }
    table.custom-table th, table.custom-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }
    table.custom-table th {
      background: var(--bg-subtle);
      color: var(--primary);
      font-weight: 600;
    }
    table.custom-table tr:last-child td {
      border-bottom: none;
    }
    /* 阶段方案时间线流程 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .flow-step-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .step-badge {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-accent);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .flow-step-item h4 {
      font-size: 1rem;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .flow-step-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    /* 指南卡与图文结合 */
    .feature-point {
      display: flex;
      gap: 14px;
      margin-bottom: 18px;
    }
    .feature-point-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: #e0f2fe;
      color: var(--primary-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 700;
    }
    /* 行动收口区 */
    .cta-container {
      background: linear-gradient(135deg, var(--primary) 0%, #1e3a5f 100%);
      color: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 30px;
      box-shadow: var(--shadow-lg);
    }
    .cta-text h3 {
      font-size: 1.5rem;
      margin-bottom: 8px;
    }
    .cta-text p {
      font-size: 0.95rem;
      color: #cbd5e1;
      max-width: 600px;
    }
    .btn-main {
      background: var(--accent-cyan);
      color: #0f172a;
      padding: 12px 26px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-block;
      white-space: nowrap;
    }
    .btn-main:hover {
      background: #38bdf8;
      box-shadow: 0 4px 14px rgba(0, 180, 216, 0.4);
    }
    /* 页脚 */
    .site-footer {
      background: #0b1a2c;
      color: #94a3b8;
      padding: 60px 0 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      color: #f1f5f9;
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
      font-size: 0.88rem;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
    }
    /* 响应式调整 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-layout { grid-template-columns: 1fr; }
      .grid-2 { grid-template-columns: 1fr; }
      .grid-3 { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
      .cta-container { flex-direction: column; text-align: center; }
      .timeline-chips { display: none; }
      .nav-wrapper { height: auto; padding: 16px 0; flex-wrap: wrap; }
      .main-nav { width: 100%; justify-content: space-between; overflow-x: auto; padding-top: 8px; }
      .footer-grid { grid-template-columns: 1fr; }
    }

/* roulang page: category3 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .stage-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .stage-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    /* 内页专用板块样式 */
    .page-hero {
      background: linear-gradient(135deg, #0a192f 0%, #0f2b48 100%);
      color: #ffffff;
      padding: 64px 0 54px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .page-hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .page-hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 4px 12px;
      background: rgba(0, 180, 216, 0.15);
      border: 1px solid var(--accent-cyan);
      border-radius: 20px;
      color: var(--accent-cyan);
      font-size: 0.82rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    h1.hero-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.3px;
    }
    .hero-summary {
      font-size: 1rem;
      line-height: 1.8;
      color: #cbd5e1;
      margin-bottom: 28px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      padding: 16px 20px;
    }
    .metric-value {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    .metric-label {
      font-size: 0.78rem;
      color: #94a3b8;
    }
    .hero-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: var(--shadow-lg);
    }
    .hero-img-box img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }

    .section-block {
      padding: 64px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block.alt-bg {
      background-color: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: -0.2px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 820px;
    }

    /* 报告卡片列表 */
    .report-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .report-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .report-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }
    .report-thumb {
      height: 170px;
      overflow: hidden;
      position: relative;
    }
    .report-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .report-card:hover .report-thumb img {
      transform: scale(1.04);
    }
    .report-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .report-tag {
      font-size: 0.75rem;
      color: var(--primary-accent);
      background: #eff6ff;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 8px;
      font-weight: 600;
      align-self: flex-start;
    }
    .report-title {
      font-size: 1.08rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .report-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .report-meta-row {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
      font-size: 0.8rem;
      color: #94a3b8;
    }
    .report-meta-val {
      font-weight: 600;
      color: var(--text-main);
    }

    /* 测试仪器与拓扑表格 */
    .bench-table-wrap {
      overflow-x: auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }
    .bench-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .bench-table th {
      background: #f8fafc;
      padding: 14px 18px;
      color: var(--primary);
      font-weight: 600;
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }
    .bench-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-muted);
      line-height: 1.5;
    }
    .bench-table tr:last-child td {
      border-bottom: none;
    }
    .bench-table tr:hover td {
      background: #fbfcfe;
      color: var(--text-main);
    }
    .tag-status {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 12px;
      font-size: 0.75rem;
      font-weight: 600;
      background: #dcfce7;
      color: #15803d;
    }

    /* 流程与验证步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-accent);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.88rem;
      margin-bottom: 14px;
    }
    .step-title {
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 温循与可靠性分析 */
    .spec-compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .compare-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
    }
    .compare-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .compare-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .stat-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .stat-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 12px;
      background: var(--bg-subtle);
      border-radius: var(--radius-sm);
      font-size: 0.86rem;
    }
    .stat-name {
      color: var(--text-main);
      font-weight: 500;
    }
    .stat-val {
      font-weight: 600;
      color: var(--primary-accent);
    }

    /* 常见问题问答 */
    .faq-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .faq-q {
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .faq-a {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 底部收口行动区 */
    .cta-banner {
      background: linear-gradient(135deg, #0f2b48 0%, #173d66 100%);
      color: #ffffff;
      padding: 56px 0;
      text-align: center;
    }
    .cta-title {
      font-size: 1.65rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .cta-desc {
      font-size: 0.95rem;
      color: #cbd5e1;
      max-width: 680px;
      margin: 0 auto 24px;
      line-height: 1.7;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }
    .btn-accent {
      background: var(--accent-cyan);
      color: #0f172a;
    }
    .btn-accent:hover {
      background: #38bdf8;
      box-shadow: 0 4px 12px rgba(0, 180, 216, 0.4);
    }
    .btn-outline {
      background: transparent;
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.3);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #ffffff;
    }

    /* 站点通用页脚 */
    .site-footer {
      background: #0b1a2d;
      color: #94a3b8;
      padding: 60px 0 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.88rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      font-size: 0.8rem;
      text-align: center;
    }

    /* 响应式设计 */
    @media (max-width: 1024px) {
      .report-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-wrapper {
        height: auto;
        padding: 12px 0;
        flex-direction: column;
        gap: 12px;
      }
      .timeline-chips {
        display: none;
      }
      .main-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
      }
      .page-hero-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .spec-compare-grid, .faq-list {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 520px) {
      .report-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      h1.hero-title {
        font-size: 1.65rem;
      }
    }

/* roulang page: index */
:root {
            --primary: #0f3460;
            --primary-accent: #16537e;
            --secondary: #e94560;
            --text-dark: #1f2937;
            --text-muted: #536471;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --card-shadow: 0 4px 18px rgba(15, 52, 96, 0.06);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* 导航系统：时间线活动导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-tag {
            font-size: 0.75rem;
            background: #e0f2fe;
            color: #0369a1;
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
            background: #f1f5f9;
        }
        .timeline-chips {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            padding: 4px;
            border-radius: 20px;
            gap: 4px;
            margin-left: 12px;
        }
        .timeline-chip {
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 14px;
            font-weight: 600;
            color: var(--text-muted);
        }
        .timeline-chip.active {
            background: var(--primary);
            color: #ffffff;
        }
        .timeline-chip.pulse {
            position: relative;
        }
        .timeline-chip.pulse::after {
            content: "";
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #10b981;
            margin-left: 4px;
            vertical-align: middle;
        }

        /* 统一 Section */
        section {
            padding: 72px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .section-light {
            background-color: var(--bg-white);
        }
        .section-tint {
            background-color: #f1f5f9;
        }
        .section-title-wrap {
            margin-bottom: 40px;
            max-width: 800px;
        }
        .section-subtitle {
            font-size: 0.85rem;
            text-transform: uppercase;
            font-weight: 700;
            color: var(--primary-accent);
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 1.85rem;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Hero: 路线图预告 + 节点条 + 订阅更新 */
        .hero-section {
            background: linear-gradient(rgba(15, 52, 96, 0.92), rgba(15, 52, 96, 0.95)), url('/assets/images/9b15dff3afb560f4.webp') center/cover no-repeat;
            color: #ffffff;
            padding: 80px 0 90px;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }
        .hero-h1 {
            font-size: 2.35rem;
            line-height: 1.25;
            margin-bottom: 20px;
            font-weight: 700;
        }
        .hero-summary {
            font-size: 1.05rem;
            line-height: 1.8;
            color: #cbd5e1;
            margin-bottom: 30px;
        }
        .roadmap-bar {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 20px;
            margin-bottom: 30px;
        }
        .roadmap-title {
            font-size: 0.85rem;
            color: #93c5fd;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .roadmap-nodes {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
        }
        .roadmap-node-item {
            border-left: 2px solid #38bdf8;
            padding-left: 8px;
        }
        .node-ver {
            font-size: 0.8rem;
            font-weight: 700;
            color: #ffffff;
        }
        .node-state {
            font-size: 0.72rem;
            color: #94a3b8;
        }
        .hero-subscribe-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            color: var(--text-dark);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }
        .sub-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .sub-card-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.5;
        }
        .sub-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .form-input {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            outline: none;
        }
        .form-input:focus {
            border-color: var(--primary-accent);
        }
        .btn-action {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            background: var(--secondary);
            color: #ffffff;
            font-weight: 600;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-action:hover {
            background: #d6334d;
        }

        /* 安全主张 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .security-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
        }
        .security-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-shadow);
        }
        .card-icon-badge {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: #e2e8f0;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .card-title {
            font-size: 1.15rem;
            color: var(--primary);
            margin-bottom: 10px;
            font-weight: 600;
        }
        .card-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 检查项 Checklist */
        .check-item-card {
            background: #f8fafc;
            border: 1px dashed #cbd5e1;
            border-radius: var(--radius-md);
            padding: 20px;
        }
        .check-header {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .check-mark {
            width: 20px;
            height: 20px;
            background: #10b981;
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
        }

        /* 合规徽章 Badges */
        .badge-block {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .compliance-pill {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 12px 20px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-dark);
            box-shadow: 0 2px 6px rgba(0,0,0,0.03);
        }
        .pill-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #3b82f6;
        }

        /* 边界说明 Card */
        .boundary-box {
            background: #fff1f2;
            border: 1px solid #fecdd3;
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .boundary-box h4 {
            color: #9f1239;
            margin-bottom: 10px;
            font-size: 1.05rem;
        }

        /* 资讯 / 列表 */
        .article-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .article-card:hover {
            box-shadow: var(--card-shadow);
        }
        .article-img-wrap {
            height: 180px;
            overflow: hidden;
            background: #e2e8f0;
        }
        .article-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .article-card:hover .article-img-wrap img {
            transform: scale(1.04);
        }
        .article-content {
            padding: 20px;
        }
        .article-tag {
            font-size: 0.75rem;
            color: var(--primary-accent);
            font-weight: 600;
            margin-bottom: 6px;
        }
        .article-title {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--primary);
        }

        /* 信任背书 / 数据 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .stat-card {
            background: var(--bg-white);
            padding: 28px 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .stat-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 参数对比表速览 */
        .data-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .data-table th, .data-table td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .data-table th {
            background: #f8fafc;
            color: var(--primary);
            font-weight: 600;
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
        }
        .faq-question {
            font-weight: 700;
            font-size: 1rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .faq-answer {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background: #0b1d33;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            color: #ffffff;
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-col-title {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .grid-4, .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .grid-3, .grid-2, .faq-grid {
                grid-template-columns: 1fr;
            }
            .timeline-chips {
                display: none;
            }
            .roadmap-nodes {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-h1 {
                font-size: 1.75rem;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .brand-tag {
      font-size: 0.75rem;
      background: var(--bg-subtle);
      color: var(--primary-accent);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      margin-left: 6px;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .timeline-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .timeline-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .page-hero {
      background: linear-gradient(135deg, #0b1e33 0%, #163e67 100%);
      color: #ffffff;
      padding: 60px 0 50px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .page-hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .page-hero-summary {
      font-size: 1.05rem;
      color: #cbd5e1;
      max-width: 820px;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      background: rgba(255, 255, 255, 0.08);
      padding: 12px 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .filter-item {
      font-size: 0.85rem;
      padding: 6px 14px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 20px;
      color: #e2e8f0;
      cursor: pointer;
    }
    .filter-item.active {
      background: var(--accent-cyan);
      color: #0f172a;
      font-weight: 700;
    }
    .section-block {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
    }
    .badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 0.98rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 860px;
    }
    .spec-table-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .spec-table th {
      background: var(--bg-subtle);
      color: var(--primary);
      padding: 14px 18px;
      font-weight: 600;
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }
    .spec-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
      white-space: nowrap;
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .spec-table tr:hover td {
      background: #f8fafc;
    }
    .tag-status {
      display: inline-block;
      padding: 2px 8px;
      font-size: 0.75rem;
      border-radius: 4px;
      font-weight: 600;
    }
    .tag-green { background: #dcfce7; color: #15803d; }
    .tag-blue { background: #e0f2fe; color: #0369a1; }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      border-color: #cbd5e1;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .img-box img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .param-list {
      list-style: none;
      margin-top: 14px;
    }
    .param-list li {
      display: flex;
      justify-content: space-between;
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.85rem;
    }
    .param-list li span:first-child {
      color: var(--text-muted);
    }
    .param-list li span:last-child {
      font-weight: 600;
      color: var(--primary);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }
    .btn-primary {
      background: var(--primary-accent);
      color: #ffffff;
    }
    .btn-primary:hover {
      background: #0052a3;
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 1px solid var(--border-color);
    }
    .btn-outline:hover {
      background: var(--bg-subtle);
    }
    .site-footer {
      background: #091a2b;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-col-title {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }
    @media (max-width: 1024px) {
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-wrapper { flex-direction: column; height: auto; padding: 16px 0; }
      .main-nav { flex-wrap: wrap; justify-content: center; }
      .timeline-chips { display: none; }
      .grid-2, .grid-3 { grid-template-columns: 1fr; }
      .page-hero-title { font-size: 1.75rem; }
    }

/* roulang page: category2 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .brand-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary-accent);
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .timeline-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .timeline-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .pulse {
      position: relative;
    }

    /* 文档帮助中心版式 Hero */
    .doc-hero {
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-subtle) 100%);
      padding: 64px 0 54px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }
    .doc-hero-badge {
      display: inline-block;
      padding: 4px 14px;
      background: #e0f2fe;
      color: #0284c7;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 16px;
    }
    .doc-hero h1 {
      font-size: 2.3rem;
      color: var(--primary);
      font-weight: 800;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .doc-hero-summary {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 30px;
      line-height: 1.7;
    }
    .search-console {
      max-width: 640px;
      margin: 0 auto 20px;
      display: flex;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 30px;
      padding: 6px 8px 6px 20px;
      box-shadow: var(--shadow-md);
    }
    .search-console input {
      flex: 1;
      border: none;
      outline: none;
      font-size: 0.95rem;
      color: var(--text-main);
      background: transparent;
    }
    .search-console button {
      background: var(--primary-accent);
      color: #fff;
      border: none;
      padding: 10px 24px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
    }
    .hot-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      align-items: center;
    }
    .hot-label {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .hot-chip-item {
      font-size: 0.8rem;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 14px;
      color: var(--primary);
    }

    /* 板块布局 */
    .section-wrap {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-wrap:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-head-bar {
      margin-bottom: 36px;
    }
    .section-head-bar h2 {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .section-head-bar p {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 板块组件样式 */
    .matrix-board {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      border-top: 3px solid var(--primary-accent);
      box-shadow: var(--shadow-sm);
    }
    .matrix-card h3 {
      font-size: 1.1rem;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .matrix-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
    }
    .param-pill {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      background: var(--bg-subtle);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      margin-right: 6px;
      margin-bottom: 6px;
    }

    .split-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .media-card-content {
      padding: 20px;
    }

    .data-table-wrap {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .spec-table th {
      background: var(--bg-subtle);
      padding: 14px 18px;
      font-weight: 600;
      color: var(--primary);
      border-bottom: 1px solid var(--border-color);
    }
    .spec-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-main);
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .download-link {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-weight: 600;
      color: var(--primary-accent);
      font-size: 0.85rem;
    }

    .flow-steps {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .flow-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-number {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 0.9rem;
    }
    .flow-box h4 {
      font-size: 1.05rem;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .flow-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .action-cta-box {
      background: linear-gradient(135deg, var(--primary) 0%, #004b99 100%);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }
    .action-cta-text h3 {
      font-size: 1.7rem;
      margin-bottom: 10px;
    }
    .action-cta-text p {
      font-size: 1rem;
      color: #cbd5e1;
      max-width: 680px;
    }
    .btn-main {
      background: var(--accent-cyan);
      color: #0f2b48;
      font-weight: 700;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
      display: inline-block;
    }
    .btn-main:hover {
      background: #38bdf8;
    }

    /* 统一页脚 */
    .site-footer {
      background: #0b1a2c;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
      text-align: center;
      font-size: 0.8rem;
    }

    @media (max-width: 1024px) {
      .matrix-board { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .split-layout { grid-template-columns: 1fr; }
      .action-cta-box { flex-direction: column; text-align: center; }
      .main-nav .nav-link:not(.active) { display: none; }
      .matrix-board { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .doc-hero h1 { font-size: 1.8rem; }
    }

/* roulang page: category3 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .brand-tag {
      font-size: 0.75rem;
      background: var(--bg-subtle);
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
      font-weight: normal;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .timeline-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .timeline-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .timeline-chip.pulse {
      position: relative;
    }
    .category-hero {
      background: linear-gradient(135deg, #0a1f33 0%, #0f2b48 100%);
      color: #ffffff;
      padding: 60px 0 54px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .category-hero-wrap {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .cat-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 180, 216, 0.15);
      color: var(--accent-cyan);
      border: 1px solid rgba(0, 180, 216, 0.3);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .cat-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .cat-lead {
      color: #cbd5e1;
      font-size: 1rem;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .hero-stat-badges {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .stat-chip {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
    }
    .stat-chip strong {
      color: var(--accent-cyan);
      display: block;
      font-size: 1.1rem;
    }
    .hero-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 12px 30px rgba(0,0,0,0.3);
      border: 1px solid rgba(255,255,255,0.15);
    }
    .section-block {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-block:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-header {
      margin-bottom: 36px;
    }
    .section-header.center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      background: #e0f2fe;
      color: #0369a1;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .card-header-icon {
      width: 44px;
      height: 44px;
      background: #e0f2fe;
      color: var(--primary-accent);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .data-table-wrap {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .data-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }
    .data-table th, .data-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }
    .data-table th {
      background: var(--bg-subtle);
      font-weight: 600;
      color: var(--primary);
    }
    .data-table tr:hover {
      background: #f8fafc;
    }
    .status-pill {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 10px;
      background: #ecfdf5;
      color: #059669;
      font-weight: 600;
    }
    .spec-item-box {
      border-left: 3px solid var(--primary-accent);
      padding-left: 16px;
      margin-bottom: 20px;
    }
    .spec-item-box h4 {
      font-size: 1rem;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .spec-item-box p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .site-footer {
      background: #0b1a29;
      color: #94a3b8;
      padding: 60px 0 24px;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
      text-align: center;
      font-size: 0.8rem;
    }
    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .category-hero-wrap, .grid-2, .grid-3 {
        grid-template-columns: 1fr;
      }
      .main-nav {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

/* roulang page: category4 */
:root {
      --primary: #0f2b48;
      --primary-accent: #0066cc;
      --accent-cyan: #00b4d8;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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 25px rgba(15,43,72,0.12);
      --transition: all 0.25s ease-in-out;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    img { max-width: 100%; height: auto; display: block; }
    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
    
    /* 顶部导航与时间线活动状态 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .brand-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo::before {
      content: "";
      width: 12px;
      height: 12px;
      background: var(--primary-accent);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
    }
    .brand-tag {
      font-size: 0.75rem;
      color: var(--primary-accent);
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
      background: var(--bg-subtle);
    }
    .timeline-chips {
      display: flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-subtle);
      padding: 4px;
      border-radius: 20px;
    }
    .timeline-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 12px;
      color: var(--text-muted);
    }
    .timeline-chip.active {
      background: var(--bg-surface);
      color: var(--primary-accent);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }
    .pulse { position: relative; }
    .pulse::after {
      content: "";
      display: inline-block;
      width: 6px;
      height: 6px;
      background: #10b981;
      border-radius: 50%;
      margin-left: 4px;
    }

    /* 页面标题头部 (发布与倒计时环态) */
    .release-hero {
      background: linear-gradient(rgba(15, 43, 72, 0.92), rgba(15, 43, 72, 0.97)), url('/assets/images/488b9ce8ef1a8a3b.webp') center/cover no-repeat;
      color: #ffffff;
      padding: 64px 0 54px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-flex {
      display: grid;
      grid-template-columns: 1fr 340px;
      gap: 40px;
      align-items: center;
    }
    .badge-chip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 4px 12px;
      background: rgba(0, 180, 216, 0.2);
      border: 1px solid var(--accent-cyan);
      border-radius: 20px;
      color: var(--accent-cyan);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .page-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .page-lead {
      font-size: 1.05rem;
      line-height: 1.75;
      color: #cbd5e1;
      margin-bottom: 24px;
    }
    .hero-meta-points {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .meta-bullet {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      color: #e2e8f0;
    }
    .meta-bullet::before {
      content: "✔";
      color: var(--accent-cyan);
      font-weight: bold;
    }
    
    /* 环形状态与预约卡片 */
    .launch-panel {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px;
      text-align: center;
    }
    .ring-wrapper {
      position: relative;
      width: 130px;
      height: 130px;
      margin: 0 auto 16px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .ring-svg {
      width: 100%;
      height: 100%;
      transform: rotate(-90deg);
    }
    .ring-bg { fill: none; stroke: rgba(255, 255, 255, 0.1); stroke-width: 8; }
    .ring-val {
      fill: none;
      stroke: var(--accent-cyan);
      stroke-width: 8;
      stroke-dasharray: 283;
      stroke-dashoffset: 42;
      stroke-linecap: round;
    }
    .ring-label {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 1.25rem;
      font-weight: 700;
      color: #ffffff;
    }
    .ring-sub { font-size: 0.75rem; color: #94a3b8; display: block; }
    .launch-btn {
      display: block;
      width: 100%;
      background: var(--accent-cyan);
      color: #0f172a;
      font-weight: 700;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      margin-top: 14px;
      font-size: 0.95rem;
      transition: var(--transition);
    }
    .launch-btn:hover { background: #38bdf8; box-shadow: 0 4px 14px rgba(0, 180, 216, 0.4); }

    /* 通用Section布局 */
    .section-wrap {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-wrap:nth-child(even) {
      background: var(--bg-surface);
    }
    .section-head {
      margin-bottom: 32px;
    }
    .section-head h2 {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
      letter-spacing: -0.3px;
    }
    .section-head p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 替代对比表单 */
    .table-container {
      overflow-x: auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }
    .spec-table th, .spec-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }
    .spec-table th {
      background: #f8fafc;
      font-weight: 600;
      color: var(--primary);
      white-space: nowrap;
    }
    .spec-table tr:last-child td { border-bottom: none; }
    .tag-compat {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
    }
    .tag-pin { background: #dcfce7; color: #15803d; }
    .tag-tune { background: #fef3c7; color: #b45309; }

    /* 网格卡片与图文 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }
    .step-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent-cyan);
    }
    .step-idx {
      font-size: 1.8rem;
      font-weight: 800;
      color: rgba(0, 102, 204, 0.15);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .step-card p {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }

    /* 偏置与匹配分析卡片 */
    .tech-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .tech-panel h4 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tech-panel h4::before {
      content: "";
      width: 4px;
      height: 16px;
      background: var(--primary-accent);
      border-radius: 2px;
    }
    .tech-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .tech-list li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      line-height: 1.5;
    }
    .tech-list li span { color: var(--primary); font-weight: 600; min-width: 80px; }

    /* 视觉大图文 */
    .img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .img-box img {
      width: 100%;
      height: 320px;
      object-fit: cover;
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #0b1f33;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.92rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-col-title {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-flex { grid-template-columns: 1fr; }
      .grid-2, .grid-3 { grid-template-columns: 1fr; }
      .nav-wrapper { flex-wrap: wrap; height: auto; padding: 14px 0; }
      .main-nav { width: 100%; overflow-x: auto; padding-top: 10px; }
      .timeline-chips { display: none; }
      .footer-grid { grid-template-columns: 1fr; }
    }