/* roulang page: index */
:root {
      --primary: #1E60D5;
      --primary-hover: #154BB2;
      --primary-light: #EBF2FE;
      --accent-cyan: #00B4D8;
      --accent-gold: #F59E0B;
      --bg-main: #F5F8FC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --border-color: #E2E8F0;
      --border-focus: #CBD5E1;
      --card-shadow: 0 4px 6px -1px rgba(27, 42, 74, 0.04), 0 12px 24px -4px rgba(27, 42, 74, 0.08);
      --hover-shadow: 0 20px 30px -8px rgba(30, 96, 213, 0.15);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
    }

    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }

    .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.2rem;
      box-shadow: 0 4px 10px rgba(30, 96, 213, 0.25);
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 32px;
      margin: 0;
    }

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

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
      line-height: 1;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-secondary {
      background: #FFFFFF;
      border-color: #CBD5E1;
      color: var(--text-muted);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(30, 96, 213, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      color: #FFFFFF;
      box-shadow: 0 6px 18px rgba(30, 96, 213, 0.35);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: translateY(0);
    }

    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-wrap.bg-white {
      background-color: var(--bg-white);
    }

    .container-xl {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: var(--primary-light);
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
      border: 1px solid rgba(30, 96, 213, 0.15);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-banner {
      background: linear-gradient(180deg, #FFFFFF 0%, #EDF3FC 100%);
      padding: 90px 0 80px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-banner::before {
      content: '';
      position: absolute;
      top: -50%;
      left: 50%;
      transform: translateX(-50%);
      width: 1000px;
      height: 600px;
      background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, rgba(30, 96, 213, 0) 70%);
      pointer-events: none;
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.03em;
      color: var(--text-main);
      margin-bottom: 22px;
    }

    .hero-title span {
      color: var(--primary);
      background: linear-gradient(135deg, #1E60D5 0%, #00B4D8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-summary {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      text-align: justify;
      text-align-last: center;
    }

    .hero-search-box {
      background: #FFFFFF;
      padding: 8px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      max-width: 640px;
      margin: 0 auto 28px;
    }

    .hero-search-box i {
      color: var(--text-sub);
      font-size: 1.2rem;
      margin: 0 16px;
    }

    .hero-search-box input {
      border: none;
      outline: none;
      width: 100%;
      font-size: 1rem;
      color: var(--text-main);
      background: transparent;
      margin: 0;
      box-shadow: none;
    }

    .hero-search-box input:focus {
      box-shadow: none;
      background: transparent;
    }

    .hero-tags {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    .hero-tags span {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-right: 4px;
    }

    .tag-chip {
      font-size: 0.85rem;
      padding: 4px 12px;
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      border-radius: 999px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .tag-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    .hud-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .hud-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(30, 96, 213, 0.4);
    }

    .hud-notch {
      position: absolute;
      top: 0;
      right: 28px;
      width: 36px;
      height: 3px;
      background: var(--primary);
      border-bottom-left-radius: 2px;
      border-bottom-right-radius: 2px;
    }

    .hud-card-icon {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.4rem;
      margin-bottom: 20px;
      border: 1px solid rgba(30, 96, 213, 0.1);
    }

    .hud-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .hud-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.68;
      margin: 0;
      flex-grow: 1;
    }

    .vs-box {
      border-radius: var(--radius-md);
      padding: 36px;
      height: 100%;
      border: 1px solid transparent;
      box-shadow: var(--card-shadow);
    }

    .vs-box.traditional {
      background: #FFFBFB;
      border-color: #FEE2E2;
    }

    .vs-box.optimized {
      background: #F8FAFF;
      border-color: #DBEAFE;
    }

    .vs-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      font-weight: 700;
      padding: 5px 14px;
      border-radius: 4px;
      margin-bottom: 20px;
    }

    .vs-box.traditional .vs-badge {
      background: #FEE2E2;
      color: #DC2626;
    }

    .vs-box.optimized .vs-badge {
      background: #DBEAFE;
      color: var(--primary);
    }

    .vs-list {
      list-style: none;
      margin: 20px 0 0;
    }

    .vs-list li {
      position: relative;
      padding-left: 28px;
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.55;
    }

    .vs-list li i {
      position: absolute;
      left: 0;
      top: 3px;
      font-size: 1rem;
    }

    .vs-box.traditional .vs-list li i {
      color: #EF4444;
    }

    .vs-box.optimized .vs-list li i {
      color: var(--primary);
    }

    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
      height: 100%;
      box-shadow: var(--card-shadow);
    }

    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(30, 96, 213, 0.15);
      line-height: 1;
      margin-bottom: 14px;
      font-family: monospace;
    }

    .step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin: 0;
    }

    .metric-panel {
      background: #0B1329;
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      box-shadow: 0 20px 40px rgba(11, 19, 41, 0.18);
      position: relative;
      overflow: hidden;
    }

    .metric-panel::before {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 400px;
      height: 100%;
      background: radial-gradient(circle, rgba(0, 180, 216, 0.15) 0%, rgba(11, 19, 41, 0) 70%);
      pointer-events: none;
    }

    .metric-item {
      text-align: center;
      padding: 10px;
    }

    .metric-val {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.1;
      color: var(--accent-cyan);
      margin-bottom: 8px;
      letter-spacing: -0.02em;
    }

    .metric-label {
      font-size: 1rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 6px;
    }

    .metric-desc {
      font-size: 0.85rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    .vs-table {
      width: 100%;
      border-collapse: collapse;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
    }

    .vs-table th,
    .vs-table td {
      padding: 18px 24px;
      text-align: left;
      font-size: 0.95rem;
      border-bottom: 1px solid var(--border-color);
    }

    .vs-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--text-main);
    }

    .vs-table tr:last-child td {
      border-bottom: none;
    }

    .vs-table tr:hover td {
      background: #F8FAFC;
    }

    .highlight-col {
      background: var(--primary-light);
      font-weight: 600;
      color: var(--primary);
    }

    .post-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .post-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(30, 96, 213, 0.4);
    }

    .post-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .post-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-sub);
      margin-bottom: 12px;
    }

    .post-body h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .post-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .post-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .post-link:hover {
      gap: 10px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: 0 2px 4px rgba(27, 42, 74, 0.02);
    }

    .faq-question {
      padding: 22px 26px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

    .faq-question i {
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-answer {
      padding: 0 26px 22px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .bottom-cta-banner {
      background: linear-gradient(135deg, #1E60D5 0%, #0B1329 100%);
      border-radius: var(--radius-lg);
      padding: 70px 40px;
      color: #FFFFFF;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(30, 96, 213, 0.2);
    }

    .bottom-cta-banner h2 {
      font-size: 2.3rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }

    .bottom-cta-banner p {
      font-size: 1.1rem;
      color: #CBD5E1;
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .site-footer {
      background: #0B1329;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid #1E293B;
    }

    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: -0.01em;
    }

    .footer-desc {
      font-size: 0.92rem;
      line-height: 1.7;
      margin-bottom: 20px;
    }

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

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a {
      color: #94A3B8;
      font-size: 0.92rem;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }

    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      text-align: center;
      font-size: 0.88rem;
    }

    .footer-bottom a {
      color: #CBD5E1;
    }

    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.4rem;
      }
      .metric-val {
        font-size: 2.5rem;
      }
    }

    @media (max-width: 768px) {
      .section-wrap {
        padding: 50px 0;
      }
      .nav-container {
        height: 64px;
      }
      .nav-links {
        display: none;
      }
      .hero-banner {
        padding: 50px 0;
      }
      .hero-title {
        font-size: 1.95rem;
      }
      .hero-summary {
        font-size: 1rem;
        text-align: left;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .bottom-cta-banner {
        padding: 40px 20px;
      }
      .bottom-cta-banner h2 {
        font-size: 1.75rem;
      }
      .vs-table {
        display: block;
        overflow-x: auto;
      }
    }

/* roulang page: category1 */
:root {
      --primary: #1E60D5;
      --primary-hover: #154BB2;
      --primary-light: #EBF2FE;
      --accent-cyan: #00B4D8;
      --accent-gold: #F59E0B;
      --bg-main: #F5F8FC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --border-color: #E2E8F0;
      --border-focus: #CBD5E1;
      --card-shadow: 0 4px 6px -1px rgba(27, 42, 74, 0.04), 0 12px 24px -4px rgba(27, 42, 74, 0.08);
      --hover-shadow: 0 20px 30px -8px rgba(30, 96, 213, 0.15);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary-hover);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
    }
    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-cyan) 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.2rem;
      box-shadow: 0 4px 10px rgba(30, 96, 213, 0.25);
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 32px;
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
      line-height: 1;
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn-secondary {
      background: #FFFFFF;
      border-color: #CBD5E1;
      color: var(--text-muted);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(30, 96, 213, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      color: #FFFFFF;
      box-shadow: 0 6px 18px rgba(30, 96, 213, 0.35);
      transform: translateY(-1px);
    }
    .container-xl {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-wrap.bg-white {
      background-color: var(--bg-white);
    }

    /* 分类页特有模块样式 */
    .cat-hero-banner {
      background: linear-gradient(180deg, #FFFFFF 0%, #EDF3FC 100%);
      padding: 46px 0 42px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .breadcrumb-nav {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-bottom: 16px;
    }
    .breadcrumb-nav a {
      color: var(--text-muted);
    }
    .breadcrumb-nav a:hover {
      color: var(--primary);
    }
    .cat-hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.25;
      letter-spacing: -0.02em;
    }
    .cat-hero-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 880px;
      margin: 0;
    }

    /* 筛选工具栏 */
    .filter-toolbar-wrap {
      margin-top: -24px;
      position: relative;
      z-index: 10;
    }
    .filter-card {
      background: #FFFFFF;
      padding: 16px 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .filter-pills {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }
    .filter-pill {
      font-size: 0.88rem;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: 999px;
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      background: #F8FAFC;
      cursor: pointer;
      transition: var(--transition);
    }
    .filter-pill:hover,
    .filter-pill.active {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      box-shadow: 0 4px 10px rgba(30, 96, 213, 0.2);
    }
    .filter-stats {
      font-size: 0.85rem;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 战术资讯卡片 */
    .hud-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }
    .hud-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--primary) 0%, var(--accent-cyan) 100%);
      opacity: 0;
      transition: var(--transition);
    }
    .hud-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(30, 96, 213, 0.4);
    }
    .hud-card:hover::before {
      opacity: 1;
    }
    .hud-card-media {
      height: 160px;
      background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
      position: relative;
      padding: 16px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
    }
    .hud-card-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background-image: radial-gradient(rgba(0, 180, 216, 0.15) 1px, transparent 1px);
      background-size: 16px 16px;
      pointer-events: none;
    }
    .hud-tag {
      position: relative;
      z-index: 2;
      align-self: flex-start;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      background: rgba(0, 180, 216, 0.2);
      color: #38BDF8;
      border: 1px solid rgba(0, 180, 216, 0.4);
      letter-spacing: 0.05em;
    }
    .hud-index {
      position: relative;
      z-index: 2;
      font-family: monospace;
      font-size: 1.4rem;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.35);
      align-self: flex-end;
    }
    .hud-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .hud-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .hud-card-title a {
      color: inherit;
    }
    .hud-card-title a:hover {
      color: var(--primary);
    }
    .hud-card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex: 1;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .hud-card-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
      font-size: 0.82rem;
      color: var(--text-sub);
    }
    .hud-link {
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .hud-link:hover {
      gap: 10px;
    }

    /* 精华榜单与特色推荐 */
    .feature-lead-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      padding: 32px;
      height: 100%;
      position: relative;
      overflow: hidden;
    }
    .feature-lead-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--primary);
    }
    .badge-primary {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 16px;
    }
    .feature-lead-title {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .feature-lead-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .feature-metrics-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 24px;
      padding: 16px;
      background: #F8FAFC;
      border-radius: var(--radius-sm);
      border: 1px solid #EEF2F6;
    }
    .metric-item-num {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
    }
    .metric-item-label {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    .rank-list-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      padding: 24px;
      height: 100%;
    }
    .rank-header {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      padding-bottom: 12px;
      border-bottom: 2px solid var(--bg-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .rank-header i {
      color: var(--accent-gold);
    }
    .rank-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 12px 0;
      border-bottom: 1px solid #F1F5F9;
    }
    .rank-item:last-child {
      border-bottom: none;
    }
    .rank-badge {
      width: 28px;
      height: 28px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 800;
      flex-shrink: 0;
    }
    .rank-badge-1 {
      background: #FEF3C7;
      color: #B45309;
      border: 1px solid #FDE68A;
    }
    .rank-badge-2 {
      background: #E2E8F0;
      color: #475569;
    }
    .rank-badge-3 {
      background: #FFEDD5;
      color: #9A3412;
    }
    .rank-badge-other {
      background: #F1F5F9;
      color: #94A3B8;
    }
    .rank-text {
      flex: 1;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      line-height: 1.4;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .rank-text a {
      color: inherit;
    }
    .rank-text a:hover {
      color: var(--primary);
    }
    .rank-count {
      font-size: 0.8rem;
      color: var(--text-sub);
      font-family: monospace;
    }

    /* 避坑手册与核心原则 */
    .guide-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      box-shadow: var(--card-shadow);
      position: relative;
    }
    .guide-card-icon {
      width: 44px;
      height: 44px;
      background: #FEF2F2;
      border: 1px solid #FEE2E2;
      color: #EF4444;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      margin-bottom: 18px;
    }
    .guide-card-icon.blue {
      background: var(--primary-light);
      border-color: #D7E5FC;
      color: var(--primary);
    }
    .guide-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .guide-card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin: 0;
    }

    /* 场景延伸微卡片 */
    .micro-scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
      box-shadow: var(--card-shadow);
      height: 100%;
    }
    .micro-scenario-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--hover-shadow);
    }
    .micro-icon {
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .micro-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .micro-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
      margin: 0;
    }

    /* 展开式网格 FAQ */
    .static-faq-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--card-shadow);
      height: 100%;
    }
    .static-faq-q {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .static-faq-q i {
      color: var(--primary);
      margin-top: 4px;
    }
    .static-faq-a {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin: 0;
      padding-left: 24px;
    }

    /* 底部轻量横条 */
    .cta-banner-bar {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 36px 44px;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: 0 15px 30px rgba(15, 23, 42, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .cta-banner-text h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .cta-banner-text p {
      font-size: 0.95rem;
      color: #94A3B8;
      margin: 0;
    }

    /* Footer 组件 */
    .site-footer {
      background-color: #0B1329;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid #1E293B;
    }
    .footer-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: -0.01em;
    }
    .footer-desc {
      font-size: 0.92rem;
      line-height: 1.7;
      margin-bottom: 16px;
      color: #94A3B8;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 24px;
      border-top: 1px solid #1E293B;
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
    }
    .footer-bottom a {
      color: #64748B;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .nav-links {
        gap: 20px;
      }
      .cta-banner-bar {
        padding: 30px;
      }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-cta-group {
        display: none;
      }
      .cat-hero-title {
        font-size: 1.75rem;
      }
      .section-wrap {
        padding: 48px 0;
      }
      .cta-banner-bar {
        flex-direction: column;
        text-align: center;
        padding: 28px 20px;
      }
      .feature-metrics-row {
        grid-template-columns: 1fr;
      }
    }