/* roulang page: index */
:root {
      --bg-base: #0B0C10;
      --bg-secondary: #12141A;
      --bg-card: #181B22;
      --bg-input: #08090C;
      --accent-orange: #FF4D26;
      --accent-cyan: #00E5FF;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 229, 255, 0.35);
      --text-title: #F5F7FA;
      --text-body: #A4B3C6;
      --text-muted: #616E7E;
      --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    }

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

    body {
      background-color: var(--bg-base);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: var(--text-body);
      text-decoration: none;
      transition: all 0.2s ease-in-out;
    }
    a:hover, a:focus {
      color: var(--accent-cyan);
    }

    /* 顶部极简高端文字导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: 0.5px;
    }

    .brand-logo .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-cyan);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      list-style: none;
      margin: 0;
    }

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
      letter-spacing: 0.3px;
    }

    .nav-links li a:hover {
      color: var(--text-title);
    }

    .nav-links li a.active {
      color: var(--text-title);
    }

    .nav-links li a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-orange);
      box-shadow: 0 0 6px rgba(255, 77, 38, 0.6);
    }

    .nav-tag-badge {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      padding: 2px 8px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.25);
      color: var(--accent-cyan);
      border-radius: 3px;
    }

    /* 按钮样式规范 */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent-orange);
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 4px;
      border: 1px solid var(--accent-orange);
      box-shadow: 0 2px 8px rgba(255, 77, 38, 0.25);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 16px rgba(255, 77, 38, 0.5);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: transparent;
      color: var(--accent-cyan) !important;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 4px;
      border: 1px solid var(--accent-cyan);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-secondary:hover {
      background: rgba(0, 229, 255, 0.08);
      transform: translateY(-2px);
      box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
    }

    /* 基础板块与标题规范 */
    .content-section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-subtitle {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--accent-cyan);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-body);
      max-width: 800px;
      line-height: 1.7;
    }

    /* 模块卡片与 HUD 边框 */
    .hud-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 30px;
      height: 100%;
      position: relative;
      transition: all 0.25s ease;
    }

    .hud-card:hover {
      border-color: var(--border-active);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }

    .hud-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 12px;
      height: 2px;
      background-color: var(--accent-cyan);
      opacity: 0.6;
    }

    /* 1. Hero 价值主张 */
    .hero-section {
      padding: 100px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 229, 255, 0.04) 0%, transparent 60%),
                  linear-gradient(to bottom, #0B0C10, #12141A);
      position: relative;
      border-bottom: 1px solid var(--border-line);
    }

    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      color: var(--text-title);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      color: var(--accent-orange);
    }

    .hero-lead {
      font-size: 1.08rem;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 640px;
    }

    .hero-stats-deck {
      background: rgba(8, 9, 12, 0.85);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 24px;
      font-family: var(--font-mono);
      position: relative;
    }

    .deck-header {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-line);
      padding-bottom: 12px;
      margin-bottom: 16px;
      font-size: 0.82rem;
      color: var(--accent-cyan);
    }

    .deck-metric-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
      font-size: 0.88rem;
    }

    .deck-metric-label {
      color: var(--text-muted);
    }

    .deck-metric-value {
      color: var(--text-title);
      font-weight: 600;
    }

    .deck-progress-bar {
      width: 100%;
      height: 4px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 2px;
      margin-top: 4px;
      position: relative;
      overflow: hidden;
    }

    .deck-progress-fill {
      height: 100%;
      background: var(--accent-cyan);
      box-shadow: 0 0 8px var(--accent-cyan);
    }

    /* 4. 截图与演示舞台 */
    .showcase-stage {
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    }

    .stage-topbar {
      background: #151820;
      padding: 12px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-line);
    }

    .stage-dots {
      display: flex;
      gap: 8px;
    }

    .stage-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
    }

    .stage-content {
      padding: 32px;
    }

    .stage-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-bottom: 24px;
    }

    .stage-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      padding: 18px;
      border-radius: 4px;
    }

    .stage-card-val {
      font-size: 1.6rem;
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--accent-cyan);
      margin-top: 6px;
    }

    /* 5. 核心指标对比 */
    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.95rem;
      margin-top: 20px;
    }

    .benchmark-table th {
      background: #151820;
      color: var(--text-title);
      padding: 14px 20px;
      text-align: left;
      font-weight: 600;
      border-bottom: 1px solid var(--border-line);
    }

    .benchmark-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-line);
      color: var(--text-body);
    }

    .benchmark-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    .val-highlight {
      color: var(--accent-orange);
      font-weight: 700;
      font-family: var(--font-mono);
    }

    /* 6. 套餐价格矩阵 */
    .pricing-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 36px 28px;
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .pricing-card.featured {
      border-color: var(--accent-orange);
      box-shadow: 0 0 20px rgba(255, 77, 38, 0.15);
    }

    .pricing-card .badge-rec {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent-orange);
      color: #FFF;
      font-size: 0.72rem;
      padding: 2px 10px;
      font-weight: 700;
      letter-spacing: 0.5px;
      border-radius: 2px;
    }

    .price-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-title);
      font-family: var(--font-mono);
      margin: 16px 0;
    }

    .price-unit {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 400;
    }

    .pricing-features {
      list-style: none;
      margin: 20px 0 32px;
      padding: 0;
      flex-grow: 1;
    }

    .pricing-features li {
      padding: 8px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
      font-size: 0.92rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .pricing-features li::before {
      content: "▪";
      color: var(--accent-cyan);
      font-size: 1rem;
    }

    /* 7. 权威评测与检测印章 */
    .audit-badge {
      border: 1px solid var(--border-line);
      background: rgba(18, 20, 26, 0.6);
      padding: 24px;
      border-radius: 4px;
      text-align: center;
    }

    .audit-score {
      font-size: 2.8rem;
      font-family: var(--font-mono);
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1;
      margin-bottom: 8px;
    }

    /* 10. 全球网络节点 */
    .node-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 16px;
    }

    .node-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      padding: 18px 20px;
      border-radius: 4px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .node-ping {
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--accent-cyan);
      background: rgba(0, 229, 255, 0.08);
      padding: 2px 8px;
      border-radius: 2px;
    }

    /* 11. 手风琴 FAQ */
    .faq-accordion {
      background: transparent;
      border: none;
      list-style: none;
      margin: 0;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      margin-bottom: 14px;
      border-radius: 4px;
      overflow: hidden;
    }

    .faq-title {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-title);
      transition: background 0.2s ease;
    }

    .faq-title:hover {
      background: rgba(255, 255, 255, 0.02);
      color: var(--accent-cyan);
    }

    .faq-arrow {
      font-size: 0.8rem;
      transition: transform 0.2s ease;
      color: var(--accent-cyan);
    }

    .faq-content {
      padding: 0 24px 20px;
      color: var(--text-body);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 12. 终极开通行动区 */
    .cta-final-box {
      background: linear-gradient(135deg, #161922 0%, #1c1313 100%);
      border: 1px solid rgba(255, 77, 38, 0.3);
      border-radius: 6px;
      padding: 56px 40px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    }

    .cta-input-group {
      display: flex;
      gap: 12px;
      max-width: 580px;
      margin-top: 24px;
    }

    .cta-input {
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      color: var(--text-title);
      padding: 12px 18px;
      border-radius: 4px;
      flex-grow: 1;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .cta-input:focus {
      border-color: var(--accent-cyan);
    }

    /* 统一规范页脚 */
    .site-footer {
      background-color: var(--bg-secondary);
      border-top: 1px solid var(--border-line);
      padding: 60px 0 32px;
      font-size: 0.9rem;
    }

    .footer-heading {
      color: var(--text-title);
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }

    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links li a {
      color: var(--text-muted);
    }

    .footer-links li a:hover {
      color: var(--accent-cyan);
    }

    .footer-copyright {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid var(--border-line);
      font-size: 0.82rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 2.1rem;
      }
      .cta-input-group {
        flex-direction: column;
      }
      .nav-links {
        gap: 1.2rem;
      }
    }

/* roulang page: category2 */
:root {
      --bg-base: #0B0C10;
      --bg-secondary: #12141A;
      --bg-card: #181B22;
      --bg-input: #08090C;
      --accent-orange: #FF4D26;
      --accent-cyan: #00E5FF;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 229, 255, 0.35);
      --text-title: #F5F7FA;
      --text-body: #A4B3C6;
      --text-muted: #616E7E;
      --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }

    a {
      color: var(--text-body);
      text-decoration: none;
      transition: all 0.2s ease-in-out;
    }
    a:hover, a:focus {
      color: var(--accent-cyan);
    }

    /* 顶部导航统一规范 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: 0.5px;
    }
    .brand-logo .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
      letter-spacing: 0.3px;
    }
    .nav-links li a:hover {
      color: var(--text-title);
    }
    .nav-links li a.active {
      color: var(--text-title);
    }
    .nav-links li a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-orange);
      box-shadow: 0 0 6px rgba(255, 77, 38, 0.6);
    }
    .nav-tag-badge {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      padding: 2px 8px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.25);
      color: var(--accent-cyan);
      border-radius: 3px;
    }

    /* 按钮系统 */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent-orange);
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 4px;
      border: 1px solid var(--accent-orange);
      box-shadow: 0 2px 8px rgba(255, 77, 38, 0.25);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 16px rgba(255, 77, 38, 0.5);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: transparent;
      color: var(--accent-cyan) !important;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 4px;
      border: 1px solid var(--accent-cyan);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      background: rgba(0, 229, 255, 0.08);
      transform: translateY(-2px);
      box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
    }

    /* 板块结构 */
    .content-section {
      padding: 76px 0;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-subtitle {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--accent-cyan);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 0.98rem;
      color: var(--text-body);
      max-width: 820px;
      line-height: 1.7;
      margin: 0;
    }

    /* HUD 卡片 */
    .hud-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 28px;
      height: 100%;
      position: relative;
      transition: all 0.25s ease;
    }
    .hud-card:hover {
      border-color: var(--border-active);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
    .hud-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 12px;
      height: 2px;
      background-color: var(--accent-cyan);
      opacity: 0.6;
    }

    /* 板块1：分类 H1 控制台 (文档帮助中心 / 居中搜索 + Chips) */
    .spec-hero-console {
      padding: 85px 0 70px;
      background: radial-gradient(circle at 50% 10%, rgba(0, 229, 255, 0.05) 0%, transparent 65%),
                  linear-gradient(to bottom, #0B0C10, #12141A);
      border-bottom: 1px solid var(--border-line);
      text-align: center;
    }
    .console-h1 {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--text-title);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .console-h1 span {
      color: var(--accent-orange);
    }
    .console-summary {
      font-size: 1.05rem;
      color: var(--text-body);
      max-width: 760px;
      margin: 0 auto 34px;
      line-height: 1.75;
    }
    .search-input-wrapper {
      max-width: 660px;
      margin: 0 auto 20px;
      position: relative;
      display: flex;
      align-items: center;
    }
    .search-input-field {
      width: 100%;
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 14px 120px 14px 20px;
      color: var(--text-title);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
      height: 52px;
      margin-bottom: 0;
    }
    .search-input-field:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.25);
      background: #060709;
    }
    .search-btn-embed {
      position: absolute;
      right: 6px;
      background: var(--accent-cyan);
      color: #0B0C10;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 8px 18px;
      border-radius: 3px;
      border: none;
      cursor: pointer;
    }
    .search-btn-embed:hover {
      background: #33EBFF;
    }
    .spec-chips-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 14px;
    }
    .chip-item {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      padding: 4px 12px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-line);
      border-radius: 20px;
      color: var(--text-muted);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .chip-item:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* 板块2：检索与快速锚点 */
    .anchor-nav-bar {
      background: var(--bg-secondary);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 16px 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .anchor-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .anchor-link-btn {
      font-family: var(--font-mono);
      font-size: 0.82rem;
      padding: 6px 14px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-line);
      border-radius: 3px;
      color: var(--text-body);
      display: inline-block;
    }
    .anchor-link-btn:hover {
      color: var(--accent-orange);
      border-color: var(--accent-orange);
    }
    .anchor-version-tag {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--accent-cyan);
    }

    /* 板块3：方案列表主体（左右交替大图文/拓扑卡片流） */
    .topology-flow-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 36px;
      margin-bottom: 32px;
      transition: border-color 0.25s ease;
    }
    .topology-flow-card:hover {
      border-color: var(--border-active);
    }
    .flow-badge {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--accent-orange);
      background: rgba(255, 77, 38, 0.1);
      border: 1px solid rgba(255, 77, 38, 0.25);
      padding: 3px 8px;
      border-radius: 2px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .flow-topology-display {
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 24px;
      font-family: var(--font-mono);
      height: 100%;
      min-height: 220px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .flow-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
      font-size: 0.82rem;
    }
    .flow-line:last-child {
      border-bottom: none;
    }
    .flow-val {
      color: var(--accent-cyan);
    }

    /* 板块4：参数规格对比表 */
    .specs-table-container {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      overflow-x: auto;
    }
    table.hud-specs-table {
      width: 100%;
      margin: 0;
      border-collapse: collapse;
      background: transparent;
      color: var(--text-body);
    }
    table.hud-specs-table thead tr {
      background: #0F1116;
      border-bottom: 1px solid var(--border-line);
    }
    table.hud-specs-table thead th {
      color: var(--text-title);
      font-family: var(--font-mono);
      font-size: 0.82rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 16px 20px;
      border: none;
    }
    table.hud-specs-table tbody tr {
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      transition: background 0.15s ease;
    }
    table.hud-specs-table tbody tr:nth-child(even) {
      background: rgba(255, 255, 255, 0.015);
    }
    table.hud-specs-table tbody tr:hover {
      background: rgba(0, 229, 255, 0.03);
    }
    table.hud-specs-table td {
      padding: 16px 20px;
      font-size: 0.9rem;
      border: none;
      vertical-align: middle;
    }
    .table-metric-mono {
      font-family: var(--font-mono);
      color: var(--accent-cyan);
      font-size: 0.85rem;
    }

    /* 板块5：避坑指南（双向红绿对比） */
    .pitfall-box {
      border-radius: 4px;
      padding: 24px;
      height: 100%;
    }
    .pitfall-negative {
      background: rgba(255, 77, 38, 0.04);
      border: 1px solid rgba(255, 77, 38, 0.25);
    }
    .pitfall-positive {
      background: rgba(0, 229, 255, 0.04);
      border: 1px solid rgba(0, 229, 255, 0.25);
    }
    .pitfall-header {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 16px;
    }
    .pitfall-negative .pitfall-header {
      color: var(--accent-orange);
    }
    .pitfall-positive .pitfall-header {
      color: var(--accent-cyan);
    }
    .pitfall-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .pitfall-list li {
      position: relative;
      padding-left: 20px;
      margin-bottom: 12px;
      font-size: 0.9rem;
      line-height: 1.6;
    }
    .pitfall-negative .pitfall-list li::before {
      content: '✕';
      position: absolute;
      left: 0;
      color: var(--accent-orange);
      font-weight: bold;
    }
    .pitfall-positive .pitfall-list li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--accent-cyan);
      font-weight: bold;
    }

    /* 板块6：开发者代码块与支持渠道 */
    .code-console-block {
      background: var(--bg-input);
border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 24px;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--text-title);
      line-height: 1.6;
      overflow-x: auto;
      position: relative;
    }
    .code-tag-head {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-line);
      padding-bottom: 10px;
      margin-bottom: 14px;
      color: var(--text-muted);
      font-size: 0.78rem;
    }
    .code-comment {
      color: var(--text-muted);
    }
    .code-keyword {
      color: var(--accent-orange);
    }
    .code-func {
      color: var(--accent-cyan);
    }

    /* 板块7：查看更多延伸与翻页 */
    .specs-footer-extend {
      background: var(--bg-secondary);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 32px 24px;
      text-align: center;
    }
    .pagination-track {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 18px;
    }
    .page-num-box {
      width: 36px;
      height: 36px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-line);
      border-radius: 3px;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--text-body);
      background: rgba(255, 255, 255, 0.02);
    }
    .page-num-box.current {
      border-color: var(--accent-orange);
      color: #FFFFFF;
      background: var(--accent-orange);
    }
    .page-num-box:hover:not(.current) {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* 页脚统一规范 */
    .site-footer {
      background-color: #07080B;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      color: var(--text-body);
    }
    .footer-heading {
      color: var(--text-title);
      font-size: 0.95rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-links li a:hover {
      color: var(--accent-cyan);
    }
    .footer-copyright {
      margin-top: 50px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 响应式调整 */
    @media screen and (max-width: 768px) {
      .nav-links {
        gap: 1.2rem;
      }
      .nav-links li:last-child {
        display: none;
      }
      .console-h1 {
        font-size: 1.95rem;
      }
      .topology-flow-card {
        padding: 20px;
      }
      .flow-topology-display {
        margin-top: 20px;
      }
      .footer-copyright {
        flex-direction: column;
      }
    }

/* roulang page: category1 */
:root {
      --bg-base: #0B0C10;
      --bg-secondary: #12141A;
      --bg-card: #181B22;
      --bg-input: #08090C;
      --accent-orange: #FF4D26;
      --accent-cyan: #00E5FF;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 229, 255, 0.35);
      --text-title: #F5F7FA;
      --text-body: #A4B3C6;
      --text-muted: #616E7E;
      --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
    }

    a {
      color: var(--text-body);
      text-decoration: none;
      transition: all 0.2s ease-in-out;
    }
    a:hover, a:focus {
      color: var(--accent-cyan);
    }

    /* 顶部极简高端文字导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 12, 16, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: 0.5px;
    }
    .brand-logo .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      list-style: none;
      margin: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
      letter-spacing: 0.3px;
    }
    .nav-links li a:hover {
      color: var(--text-title);
    }
    .nav-links li a.active {
      color: var(--text-title);
    }
    .nav-links li a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-orange);
      box-shadow: 0 0 6px rgba(255, 77, 38, 0.6);
    }
    .nav-tag-badge {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      padding: 2px 8px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.25);
      color: var(--accent-cyan);
      border-radius: 3px;
    }

    /* 按钮与交互徽章 */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent-orange);
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 10px 22px;
      border-radius: 4px;
      border: 1px solid var(--accent-orange);
      box-shadow: 0 2px 8px rgba(255, 77, 38, 0.25);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 16px rgba(255, 77, 38, 0.5);
    }
    .btn-outline-cyan {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: transparent;
      color: var(--accent-cyan) !important;
      font-weight: 500;
      font-size: 0.88rem;
      padding: 6px 16px;
      border-radius: 4px;
      border: 1px solid rgba(0, 229, 255, 0.4);
      transition: all 0.2s ease;
    }
    .btn-outline-cyan:hover {
      background: rgba(0, 229, 255, 0.1);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.25);
    }

    /* 模块通用样式 */
    .content-section {
      padding: 64px 0;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .section-header {
      margin-bottom: 36px;
    }
    .section-subtitle {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--accent-cyan);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 6px;
      display: block;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 0.98rem;
      color: var(--text-body);
      max-width: 820px;
      line-height: 1.7;
      margin: 0;
    }

    /* 1. 分类 H1 引导区 */
    .cat-hero-panel {
      padding: 56px 0 48px;
      background: linear-gradient(180deg, #12141A 0%, #0B0C10 100%);
      border-bottom: 1px solid var(--border-line);
    }
    .cat-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      color: var(--text-title);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.3px;
    }
    .cat-h1 span {
      color: var(--accent-orange);
    }
    .cat-lead {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 0;
      max-width: 680px;
    }
    .hud-meta-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 20px;
      position: relative;
    }
    .hud-meta-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 14px;
      height: 2px;
      background: var(--accent-cyan);
    }
    .hud-meta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      font-family: var(--font-mono);
    }
    .hud-meta-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-transform: uppercase;
      margin-bottom: 4px;
    }
    .hud-meta-value {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-title);
    }
    .hud-meta-value.cyan {
      color: var(--accent-cyan);
    }
    .hud-meta-value.orange {
      color: var(--accent-orange);
    }

    /* 2. 多维属性筛选控制条 */
    .filter-section {
      background: #0E1015;
      padding: 24px 0;
      border-bottom: 1px solid var(--border-line);
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 12px;
      font-size: 0.88rem;
    }
    .filter-row:last-child {
      margin-bottom: 0;
    }
    .filter-label {
      width: 86px;
      color: var(--text-muted);
      font-family: var(--font-mono);
      font-size: 0.8rem;
      flex-shrink: 0;
    }
    .filter-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .filter-tag {
      display: inline-flex;
      align-items: center;
      padding: 4px 14px;
      border-radius: 3px;
      font-size: 0.84rem;
      color: var(--text-body);
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      cursor: pointer;
      transition: all 0.15s ease;
    }
    .filter-tag:hover {
      border-color: var(--border-active);
      color: var(--text-title);
    }
    .filter-tag.active {
      background: rgba(0, 229, 255, 0.12);
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
    }
    .filter-tag.active::before {
      content: '●';
      font-size: 0.55rem;
      margin-right: 6px;
      color: var(--accent-cyan);
    }

    /* 3. 核心内容卡片列表 */
    .eval-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
      transition: all 0.2s ease;
    }
    .eval-card:hover {
      border-color: var(--border-active);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
    .card-top-info {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 14px;
    }
    .badge-protocol {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      padding: 2px 8px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-line);
      color: var(--text-muted);
      border-radius: 2px;
    }
    .score-badge {
      font-family: var(--font-mono);
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--accent-cyan);
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid rgba(0, 229, 255, 0.25);
      padding: 2px 8px;
      border-radius: 3px;
    }
    .card-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .card-summary {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .card-spec-strip {
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      border-radius: 3px;
      padding: 10px 12px;
      margin-bottom: 18px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      font-family: var(--font-mono);
      font-size: 0.78rem;
    }
    .card-spec-item span:first-child {
      color: var(--text-muted);
      display: block;
      margin-bottom: 2px;
    }
    .card-spec-item span:last-child {
      color: var(--text-title);
      font-weight: 600;
    }
    .card-footer-action {
      display: flex;
      justify-content: flex-end;
      align-items: center;
      border-top: 1px solid var(--border-line);
      padding-top: 14px;
    }

    /* 4. 精选深度专题聚焦 */
    .featured-box {
      background: #151820;
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 36px;
      position: relative;
    }
    .featured-box::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
    }
    .radar-stats-box {
      background: var(--bg-input);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 24px;
      font-family: var(--font-mono);
      height: 100%;
    }
    .radar-title {
      font-size: 0.82rem;
      color: var(--accent-cyan);
      letter-spacing: 1px;
      margin-bottom: 16px;
      border-bottom: 1px solid var(--border-line);
      padding-bottom: 8px;
    }
    .metric-progress-item {
      margin-bottom: 14px;
    }
    .metric-progress-item:last-child {
      margin-bottom: 0;
    }
    .metric-label-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.82rem;
      margin-bottom: 6px;
    }
    .metric-bar-bg {
      background: rgba(255, 255, 255, 0.05);
      height: 6px;
      border-radius: 3px;
      overflow: hidden;
    }
    .metric-bar-fill {
      background: var(--accent-orange);
      height: 100%;
      border-radius: 3px;
    }
    .metric-bar-fill.cyan {
      background: var(--accent-cyan);
    }

    /* 5. 分类推荐排行榜 */
    .rank-list-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      overflow: hidden;
    }
    .rank-item {
      display: flex;
      align-items: center;
      padding: 16px 24px;
      border-bottom: 1px solid var(--border-line);
      transition: background 0.2s ease;
    }
    .rank-item:last-child {
      border-bottom: none;
    }
    .rank-item:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    .rank-num {
      font-family: var(--font-mono);
      font-size: 1.15rem;
      font-weight: 700;
      width: 38px;
      color: var(--text-muted);
    }
    .rank-item:nth-child(1) .rank-num {
      color: var(--accent-orange);
    }
    .rank-item:nth-child(2) .rank-num {
      color: var(--accent-cyan);
    }
    .rank-item:nth-child(3) .rank-num {
      color: #FFF;
    }
    .rank-info {
      flex-grow: 1;
      padding-right: 20px;
    }
    .rank-title {
      font-size: 0.96rem;
      font-weight: 600;
      color: var(--text-title);
      margin-bottom: 4px;
    }
    .rank-meta {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-family: var(--font-mono);
    }
    .rank-score {
      font-family: var(--font-mono);
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--accent-cyan);
      text-align: right;
      min-width: 90px;
    }

    /* 6. 进阶应用技巧支持 */
    .principle-box {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 28px;
      height: 100%;
      position: relative;
    }
    .principle-step {
      font-family: var(--font-mono);
      font-size: 0.76rem;
      color: var(--accent-orange);
      font-weight: 700;
      margin-bottom: 12px;
      display: block;
      letter-spacing: 1px;
    }
    .principle-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .principle-desc {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.68;
      margin: 0;
    }

    /* 7. 底部延伸阅读引导 */
    .read-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
    }
    .read-link-card {
      background: #111319;
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s ease;
    }
    .read-link-card:hover {
      border-color: var(--accent-cyan);
      background: #151821;
    }
    .read-link-title {
      font-size: 0.9rem;
      color: var(--text-title);
      font-weight: 500;
    }
    .read-link-icon {
      color: var(--accent-cyan);
      font-family: var(--font-mono);
      font-size: 0.85rem;
    }

    /* 页脚标准体系 */
    .site-footer {
      background: #08090C;
      border-top: 1px solid var(--border-line);
      padding: 60px 0 30px;
      position: relative;
    }
    .footer-heading {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      font-size: 0.86rem;
      color: var(--text-muted);
    }
    .footer-links li a:hover {
      color: var(--accent-cyan);
    }
    .footer-copyright {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 移动端响应优化 */
    @media (max-width: 768px) {
      .nav-links {
        gap: 1.2rem;
      }
      .nav-links li:last-child {
        display: none;
      }
      .cat-h1 {
        font-size: 1.85rem;
      }
      .hud-meta-card {
        margin-top: 24px;
      }
      .filter-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
      .filter-label {
        width: 100%;
      }
      .card-spec-strip {
        grid-template-columns: 1fr;
      }
      .featured-box {
        padding: 20px;
      }
      .radar-stats-box {
        margin-top: 24px;
      }
      .rank-item {
        padding: 12px 16px;
      }
    }