/* roulang page: index */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }

    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }

    /* 滚动收缩双层导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-main {
      padding: 14px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .site-header.scrolled .header-main {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .header-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 16px;
    }

    /* 按钮规范 */
    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-cyber:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-main);
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
      color: #fff;
    }

    /* Hero 卡片堆叠 */
    .hero-section {
      position: relative;
      padding: 70px 0 90px;
      background-image: linear-gradient(180deg, rgba(10, 13, 20, 0.85) 0%, rgba(10, 13, 20, 0.98) 100%), url('/assets/images/50c30185c2c0ba1e.webp');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }
    .hero-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(90deg, #ffffff, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-stack {
      position: relative;
      height: 380px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .stack-card {
      position: absolute;
      border-radius: var(--radius-md);
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      transition: var(--transition);
      padding: 24px;
    }
    .stack-card.main-card {
      width: 82%;
      z-index: 3;
      background: rgba(17, 23, 38, 0.95);
      border-color: rgba(0, 240, 255, 0.4);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
    }
    .stack-card.left-card {
      width: 76%;
      left: 0;
      top: 20px;
      z-index: 1;
      opacity: 0.6;
      transform: scale(0.92) translateX(-15px);
    }
    .stack-card.right-card {
      width: 76%;
      right: 0;
      bottom: 20px;
      z-index: 2;
      opacity: 0.75;
      transform: scale(0.95) translateX(15px);
    }
    .stack-card:hover {
      opacity: 1;
      transform: translateY(-5px) scale(1);
      z-index: 4;
      border-color: var(--primary);
    }

    /* 基础区块样式 */
    .content-section {
      padding: 65px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .section-alt {
      background: #0d121c;
    }
    .section-title-wrap {
      margin-bottom: 45px;
    }
    .badge-tag {
      display: inline-block;
      font-size: 11px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 10px;
      background: var(--primary-dim);
      color: var(--primary);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-summary {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
      max-width: 820px;
    }

    /* UI 卡片与网格 */
    .metro-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: var(--transition);
    }
    .metro-card:hover {
      border-color: var(--border-glow);
      background: var(--bg-card-alt);
      transform: translateY(-4px);
    }
    .card-icon {
      font-size: 26px;
      color: var(--primary);
      margin-bottom: 18px;
      display: inline-block;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
    }
    .card-desc {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      margin: 0;
    }

    /* 时段状态面板 */
    .time-slot-card {
      border-left: 3px solid var(--primary);
      background: var(--bg-card);
      padding: 18px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-bottom: 14px;
    }
    .time-slot-header {
      display: flex;
      justify-content: space-between;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    /* 专家工程师卡片 */
    .expert-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .expert-img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      border-bottom: 1px solid var(--border-color);
    }
    .expert-body {
      padding: 20px;
    }

    /* 预约留资卡片 */
    .booking-box {
      background: linear-gradient(145deg, #111726, #162035);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: 0 15px 40px rgba(0,0,0,0.5);
    }
    .form-input {
      background: #0a0d14;
      border: 1px solid var(--border-glow);
      color: #fff;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      width: 100%;
    }
    .form-input:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 10px var(--primary-glow);
      background: #0c101a;
    }

    /* 页脚 */
    .site-footer {
      background: #05080f;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 25px;
      font-size: 13px;
      color: var(--text-faint);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li { margin-bottom: 8px; }
    .footer-links a { color: var(--text-muted); }
    .footer-links a:hover { color: var(--primary); }

    /* 移动端汉堡与自适应 */
    @media screen and (max-width: 1023px) {
      .header-top { display: none !important; }
      .nav-links { display: none; }
      .mobile-menu-btn { display: inline-block; font-size: 20px; color: #fff; cursor: pointer; }
      .hero-stack { height: auto; margin-top: 35px; }
      .stack-card { position: static; width: 100% !important; margin-bottom: 16px; transform: none !important; opacity: 1 !important; }
    }
    @media screen and (min-width: 1024px) {
      .mobile-menu-btn { display: none; }
    }

/* roulang page: category2 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-main {
      padding: 14px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .site-header.scrolled .header-main {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-cyber:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-main);
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
      color: #fff;
    }
    .mobile-menu-btn {
      background: transparent;
      border: none;
      color: #fff;
      font-size: 20px;
      display: none;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .nav-links { display: none !important; }
      .mobile-menu-btn { display: inline-block; }
    }
    .content-section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .section-alt {
      background: #0d121c;
    }
    .badge-tag {
      display: inline-block;
      font-size: 11px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 10px;
      background: var(--primary-dim);
      color: var(--primary);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-summary {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
      max-width: 820px;
      margin-bottom: 35px;
    }
    /* Hero 对比选型与高亮卡片 */
    .hero-compare {
      position: relative;
      padding: 75px 0 85px;
      background-image: linear-gradient(180deg, rgba(10, 13, 20, 0.88) 0%, rgba(10, 13, 20, 0.99) 100%), url('/assets/images/99aeacba415714df.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      height: 100%;
      position: relative;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .compare-card.highlight {
      background: linear-gradient(180deg, #131d36 0%, #101626 100%);
      border: 2px solid var(--primary);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.25);
      transform: translateY(-8px);
    }
    .compare-badge {
      position: absolute;
      top: -12px;
      right: 20px;
      background: linear-gradient(90deg, var(--secondary), var(--accent));
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
    }
    .compare-price {
      font-size: 2.2rem;
      font-weight: 800;
      color: #fff;
      margin: 15px 0 5px;
    }
    .compare-price small {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 400;
    }
    .feature-list {
      list-style: none;
      margin: 20px 0 30px;
      padding: 0;
      flex-grow: 1;
    }
    .feature-list li {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .feature-list li i {
      color: var(--primary);
    }
    /* 性能监控仪表盘组件 */
    .dashboard-box {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 24px;
    }
    .stat-badge {
      font-family: monospace;
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--primary);
    }
    .ping-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13.5px;
    }
    .ping-row:last-child { border-bottom: none; }
    .ping-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      display: inline-block;
      box-shadow: 0 0 8px #10b981;
      margin-right: 8px;
    }
    .ping-bar-wrap {
      width: 140px;
      height: 6px;
      background: #1f293d;
      border-radius: 3px;
      overflow: hidden;
      margin: 0 15px;
    }
    .ping-bar {
      height: 100%;
      background: linear-gradient(90deg, #10b981, var(--primary));
      border-radius: 3px;
    }
    /* 叙事 steps 步骤 */
    .step-item {
      position: relative;
      padding-left: 50px;
      margin-bottom: 30px;
    }
    .step-num {
      position: absolute;
      left: 0;
      top: 0;
      width: 36px;
      height: 36px;
      background: var(--bg-card-alt);
      border: 1px solid var(--primary);
      border-radius: 50%;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    /* 卡片通用 */
    .card-metro {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: var(--transition);
    }
    .card-metro:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
    }
    .site-footer {
      background: #06080e;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 25px;
    }
    .footer-col-title {
      color: #fff;
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 13.5px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }

/* roulang page: category1 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-main {
      padding: 14px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top { display: none; }
    .site-header.scrolled .header-main { padding: 8px 0; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6); }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i { color: var(--primary); text-shadow: 0 0 12px var(--primary); }
    .nav-links { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
    .nav-links li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .mobile-menu-btn {
      background: transparent;
      border: 1px solid var(--border-color);
      color: #fff;
      font-size: 18px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      display: none;
    }
    @media (max-width: 1024px) {
      .nav-links { display: none !important; }
      .mobile-menu-btn { display: inline-block; }
    }
    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-cyber:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-main);
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
      color: #fff;
    }
    .help-hero {
      padding: 65px 0 75px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 240, 255, 0.08) 0%, rgba(10, 13, 20, 0.98) 70%), url('/assets/images/99aeacba415714df.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .help-title {
      font-size: 2.3rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .help-subtitle {
      color: var(--text-muted);
      font-size: 16px;
      max-width: 780px;
      margin: 0 auto 30px;
    }
    .search-box-wrap {
      max-width: 640px;
      margin: 0 auto 20px;
      position: relative;
    }
    .search-input {
      width: 100%;
      height: 52px;
      background: rgba(17, 23, 38, 0.9);
      border: 1px solid var(--border-glow);
      border-radius: 26px;
      padding: 0 54px 0 24px;
      color: #fff;
      font-size: 15px;
      outline: none;
      box-shadow: 0 10px 25px rgba(0,0,0,0.4);
      transition: var(--transition);
    }
    .search-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 20px var(--primary-glow);
    }
    .search-submit-icon {
      position: absolute;
      right: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--primary);
      font-size: 18px;
    }
    .chips-group {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 15px;
    }
    .chip-item {
      font-size: 12px;
      padding: 5px 14px;
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      cursor: pointer;
      transition: var(--transition);
    }
    .chip-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-dim);
    }
    .content-section {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-alt {
      background: #0d121c;
    }
    .section-title-wrap {
      margin-bottom: 40px;
    }
    .badge-tag {
      display: inline-block;
      font-size: 11px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 10px;
      background: var(--primary-dim);
      color: var(--primary);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-summary {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }
    .dashboard-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 15px 35px rgba(0,0,0,0.4);
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }
    .matrix-item {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px;
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }
    .matrix-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 240, 255, 0.15);
    }
    .matrix-status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      display: inline-block;
      box-shadow: 0 0 8px #10b981;
      margin-right: 6px;
    }
    .matrix-name {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .param-list {
      list-style: none;
      margin: 12px 0 0;
      padding: 0;
      font-size: 13px;
      color: var(--text-muted);
    }
    .param-list li {
      display: flex;
      justify-content: space-between;
      padding: 5px 0;
      border-bottom: 1px dashed rgba(255,255,255,0.06);
    }
    .param-list li:last-child {
      border-bottom: none;
    }
    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      height: 100%;
      position: relative;
    }
    .step-badge {
      font-size: 28px;
      font-weight: 800;
      color: rgba(0, 240, 255, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card h4 {
      font-size: 17px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .step-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin: 0;
    }
    .kpi-box {
      background: linear-gradient(145deg, var(--bg-card), var(--bg-card-alt));
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }
    .kpi-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .kpi-label {
      font-size: 13px;
      color: var(--text-muted);
    }
    .site-footer {
      background: #06090e;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 25px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-col-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }
    .image-cover-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-glow);
      box-shadow: 0 15px 30px rgba(0,0,0,0.5);
    }
    .image-cover-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }
    .image-cover-box:hover img {
      transform: scale(1.03);
    }

/* roulang page: category3 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-main {
      padding: 14px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top { display: none; }
    .site-header.scrolled .header-main {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .mobile-menu-btn {
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 20px;
      cursor: pointer;
      display: none;
    }
    @media (max-width: 1024px) {
      .mobile-menu-btn { display: inline-block; }
      .nav-links { display: none !important; }
    }
    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-cyber:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-main);
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
      color: #fff;
    }
    .content-section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .section-alt {
      background: #0d121c;
    }
    .section-title-wrap {
      margin-bottom: 40px;
    }
    .badge-tag {
      display: inline-block;
      font-size: 11px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 10px;
      background: var(--primary-dim);
      color: var(--primary);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-summary {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
      max-width: 840px;
    }
    .metro-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      height: 100%;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .metro-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
    }
    .hero-tunnel {
      position: relative;
      padding: 75px 0 85px;
      background-image: linear-gradient(180deg, rgba(10, 13, 20, 0.88) 0%, rgba(10, 13, 20, 0.98) 100%), url('/assets/images/6ef80488db15fa00.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-tunnel h1 {
      font-size: 2.4rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
      background: linear-gradient(90deg, #ffffff, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .tunnel-board {
      background: rgba(17, 23, 38, 0.9);
      border: 1px solid rgba(0, 240, 255, 0.3);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .group-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(121, 40, 202, 0.2);
      border: 1px solid rgba(121, 40, 202, 0.5);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      color: #d8b4fe;
      margin-bottom: 20px;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-dim);
      border: 1px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .site-footer {
      background: #07090f;
      padding: 60px 0 25px;
      border-top: 1px solid var(--border-color);
      font-size: 14px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }

/* roulang page: category4 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-main {
      padding: 14px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .site-header.scrolled .header-main {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .site-logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-cyber:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-main);
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
      color: #fff;
    }
    .mobile-menu-btn {
      background: none;
      border: none;
      color: #fff;
      font-size: 20px;
      display: none;
      cursor: pointer;
    }
    @media (max-width: 1023px) {
      .nav-links { display: none !important; }
      .mobile-menu-btn { display: inline-block; }
    }
    .doc-hero {
      position: relative;
      padding: 60px 0 70px;
      background-image: linear-gradient(180deg, rgba(10, 13, 20, 0.88) 0%, rgba(10, 13, 20, 0.98) 100%), url('/assets/images/6ef80488db15fa00.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .content-section {
      padding: 60px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-alt {
      background: #0d121c;
    }
    .badge-tag {
      display: inline-block;
      font-size: 11px;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 10px;
      background: var(--primary-dim);
      color: var(--primary);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-summary {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
      max-width: 820px;
      margin-bottom: 30px;
    }
    .card-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: var(--transition);
    }
    .card-box:hover {
      border-color: rgba(0, 240, 255, 0.5);
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    }
    .code-terminal {
      background: #060910;
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-sm);
      padding: 16px;
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 13px;
      color: #a5b4fc;
      overflow-x: auto;
      margin-top: 15px;
      line-height: 1.5;
    }
    .code-terminal .cmd-line {
      color: var(--primary);
    }
    .code-terminal .comment {
      color: var(--text-faint);
    }
    .doc-nav-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .doc-nav-list li {
      margin-bottom: 10px;
    }
    .doc-nav-list li a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--bg-card-alt);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 14px;
    }
    .doc-nav-list li a:hover {
      border-color: var(--primary);
      background: rgba(0, 240, 255, 0.08);
      color: var(--primary);
    }
    .metric-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.2);
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      color: var(--primary);
    }
    .site-footer {
      background: #06080e;
      padding: 50px 0 25px;
      border-top: 1px solid var(--border-color);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }

/* roulang page: index */
:root {
      --tl-primary: #0f172a;
      --tl-accent: #0284c7;
      --tl-accent-glow: #38bdf8;
      --tl-emerald: #10b981;
      --tl-dark-bg: #070d19;
      --tl-card-bg: #132238;
      --tl-card-border: #1e3a5f;
      --tl-text-light: #f8fafc;
      --tl-text-muted: #94a3b8;
      --tl-light-bg: #f8fafc;
      --tl-border-light: #e2e8f0;
      --tl-radius: 12px;
      --tl-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: #0b1320;
      color: #e2e8f0;
      line-height: 1.68;
      overflow-x: hidden;
    }

    a {
      color: var(--tl-accent-glow);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: #7dd3fc;
    }

    /* 滚动收缩双层导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      background: rgba(7, 13, 25, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(56, 189, 248, 0.15);
    }
    .nav-row-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      transition: height 0.3s, opacity 0.3s;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo span {
      background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .brand-status-tag {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 20px;
      background: rgba(16, 185, 129, 0.15);
      color: #34d399;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }
    .nav-top-tools {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--tl-text-muted);
    }
    .nav-row-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 24px;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 20px;
      margin: 0;
    }
    .nav-links a {
      color: #cbd5e1;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: 6px;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      background: rgba(56, 189, 248, 0.12);
    }
    .nav-btn {
      padding: 6px 16px;
      font-size: 0.88rem;
      font-weight: 600;
      background: #0284c7;
      color: #fff;
      border-radius: 6px;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .nav-btn:hover {
      background: #0369a1;
      color: #fff;
    }

    /* 滚动收缩效果 */
    body.is-scrolled .site-header .nav-row-top {
      display: none;
    }
    body.is-scrolled .site-header {
      box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }

    /* 主视觉容器 */
    .hero-wrapper {
      padding-top: 140px;
      padding-bottom: 70px;
      background-image: linear-gradient(180deg, rgba(7, 13, 25, 0.82) 0%, rgba(11, 19, 32, 0.95) 100%), url('/assets/images/50c30185c2c0ba1e.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-grid {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.5rem;
      font-weight: 800;
      color: #ffffff;
      line-height: 1.25;
      margin-bottom: 18px;
    }
    .hero-h1 span {
      color: var(--tl-accent-glow);
    }
    .hero-lead {
      font-size: 1.05rem;
      color: #94a3b8;
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .hero-metrics-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding: 16px;
      border-radius: var(--tl-radius);
      background: rgba(19, 34, 56, 0.6);
      border: 1px solid var(--tl-card-border);
      margin-bottom: 30px;
    }
    .metric-item-num {
      font-size: 1.45rem;
      font-weight: 700;
      color: #38bdf8;
    }
    .metric-item-label {
      font-size: 0.8rem;
      color: #64748b;
    }

    /* 卡片堆叠形态 */
    .stack-cards-container {
      position: relative;
      height: 380px;
    }
    .stack-card {
      position: absolute;
      width: 88%;
      border-radius: var(--tl-radius);
      background: #132238;
      border: 1px solid var(--tl-card-border);
      padding: 24px;
      box-shadow: var(--tl-shadow);
      transition: transform 0.3s ease, z-index 0.3s ease;
    }
    .stack-card-main {
      top: 15px;
      left: 10px;
      z-index: 3;
      background: linear-gradient(145deg, #162a47 0%, #0e1c31 100%);
      border: 1px solid rgba(56, 189, 248, 0.4);
    }
    .stack-card-sub1 {
      top: -15px;
      left: 45px;
      z-index: 2;
      opacity: 0.85;
      filter: blur(0.2px);
    }
    .stack-card-sub2 {
      top: 50px;
      left: -10px;
      z-index: 1;
      opacity: 0.65;
    }

    /* 通用板块与排版 */
    .section-block {
      padding: 70px 20px;
      position: relative;
    }
    .section-alt {
      background: #0d1728;
    }
    .section-container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-header.text-center {
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--tl-accent-glow);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1rem;
      color: #94a3b8;
      max-width: 780px;
      margin: 0 auto;
    }

    /* 栅格网格样式 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .ui-card {
      background: var(--tl-card-bg);
      border: 1px solid var(--tl-card-border);
      border-radius: var(--tl-radius);
      padding: 24px;
      position: relative;
      transition: transform 0.25s, border-color 0.25s;
    }
    .ui-card:hover {
      transform: translateY(-4px);
      border-color: #38bdf8;
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: rgba(56, 189, 248, 0.12);
      color: #38bdf8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.92rem;
      color: #94a3b8;
      line-height: 1.6;
    }

    /* 时段卡体系 */
    .schedule-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .schedule-card {
      background: #111e33;
      border: 1px solid var(--tl-card-border);
      border-radius: var(--tl-radius);
      padding: 20px;
      border-top: 3px solid #0284c7;
    }
    .schedule-time {
      font-size: 1.1rem;
      font-weight: 700;
      color: #38bdf8;
      margin-bottom: 6px;
    }
    .schedule-status {
      font-size: 0.78rem;
      color: #34d399;
      margin-bottom: 10px;
    }

    /* 专家团队块 */
    .team-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .team-card {
      background: #132238;
      border: 1px solid var(--tl-card-border);
      border-radius: var(--tl-radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .team-img-wrap {
      height: 180px;
      overflow: hidden;
    }
    .team-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .team-card:hover .team-img-wrap img {
      transform: scale(1.05);
    }
    .team-content {
      padding: 20px;
    }

    /* 客户评价与质保 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-bubble {
      background: #111e33;
      border: 1px solid #1e3a5f;
      border-radius: var(--tl-radius);
      padding: 22px;
      position: relative;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }
    .user-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: #0284c7;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    /* 资讯列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #132238;
      border-radius: var(--tl-radius);
      border: 1px solid var(--tl-card-border);
      overflow: hidden;
    }
    .news-img {
      height: 150px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 18px;
    }
    .news-date {
      font-size: 0.8rem;
      color: #64748b;
      margin-bottom: 6px;
    }
    .news-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    /* 预约及调度表单 */
    .form-box {
      max-width: 820px;
      margin: 0 auto;
      background: #132238;
      border: 1px solid rgba(56, 189, 248, 0.3);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--tl-shadow);
    }
    .custom-input {
      width: 100%;
      padding: 12px 16px;
      background: #091322;
      border: 1px solid #1e3a5f;
      color: #fff;
      border-radius: 8px;
      margin-bottom: 16px;
      font-size: 0.95rem;
    }
    .custom-input:focus {
      outline: none;
      border-color: #38bdf8;
      box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(90deg, #0284c7 0%, #0369a1 100%);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      transition: opacity 0.2s;
    }
    .btn-submit:hover {
      opacity: 0.92;
    }

    /* 仪表盘与参数卡 */
    .terminal-board {
      background: #060c17;
      border: 1px solid #1e3a5f;
      border-radius: 8px;
      padding: 16px;
      font-family: monospace;
      font-size: 0.85rem;
      color: #38bdf8;
      margin-bottom: 20px;
    }

    /* 统一页脚 */
    .site-footer {
      background: #050a14;
      border-top: 1px solid #142338;
      padding: 60px 20px 30px;
      color: #64748b;
      font-size: 0.9rem;
    }
    .footer-grid {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1.8fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94a3b8;
    }
    .footer-links a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      max-width: 1200px;
      margin: 0 auto;
      border-top: 1px solid #101d2f;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .stack-cards-container {
        display: none;
      }
      .schedule-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .team-grid, .reviews-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 1.9rem;
      }
      .schedule-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
    }

/* roulang page: index */
:root {
      --brand-primary: #0f172a;
      --brand-accent: #2563eb;
      --brand-cyan: #06b6d4;
      --brand-bg: #0b0f19;
      --brand-surface: #131b2e;
      --brand-card-bg: rgba(19, 27, 46, 0.85);
      --brand-border: #1e293b;
      --brand-border-light: #334155;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
      --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.25);
    }

    * { box-sizing: border-box; }
    body {
      background-color: var(--brand-bg);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      margin: 0;
      padding: 0;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a { color: var(--brand-cyan); text-decoration: none; transition: all 0.25s ease; }
    a:hover, a:focus { color: #38bdf8; text-decoration: none; }

    /* 滚动收缩双层导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(11, 15, 25, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--brand-border);
      transition: all 0.35s ease;
    }
    .header-top {
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      transition: all 0.3s ease;
    }
    .header-bottom {
      padding: 8px 0;
      transition: all 0.3s ease;
    }
    .site-header.scrolled .header-top {
      height: 0;
      padding: 0;
      overflow: hidden;
      opacity: 0;
      border-bottom: none;
    }
    .site-header.scrolled {
      box-shadow: var(--shadow-md);
      background: rgba(11, 15, 25, 0.98);
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .nav-brand i { color: var(--brand-cyan); font-size: 1.4rem; }
    .nav-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
    }
    .channel-nav {
      display: flex;
      gap: 28px;
      margin: 0;
      list-style: none;
    }
    .channel-nav li a {
      color: #cbd5e1;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .channel-nav li a.active, .channel-nav li a:hover {
      color: var(--brand-cyan);
    }
    .channel-nav li a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--brand-cyan);
      border-radius: 2px;
    }

    .btn-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--brand-accent), #1d4ed8);
      color: #fff !important;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 600;
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
      cursor: pointer;
    }
    .btn-action:hover {
      background: linear-gradient(135deg, #1d4ed8, #1e40af);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
    }

    /* 页面基准间距 */
    main { margin-top: 108px; }
    .section-block {
      padding: 80px 0;
      position: relative;
    }
    .section-dark {
      background-color: #0d1322;
      border-top: 1px solid var(--brand-border);
      border-bottom: 1px solid var(--brand-border);
    }
    .section-heading {
      margin-bottom: 48px;
      position: relative;
    }
    .section-heading h2 {
      font-size: 2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .section-heading h2::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 24px;
      background: var(--brand-cyan);
      border-radius: 2px;
    }
    .section-heading p {
      color: var(--text-muted);
      max-width: 820px;
      margin: 0;
      font-size: 0.98rem;
    }

    /* 首屏堆叠卡片 */
    .hero-wrapper {
      position: relative;
      padding: 70px 0 90px;
      background-image: linear-gradient(180deg, rgba(11,15,25,0.78), rgba(11,15,25,0.95)), url('/assets/images/50c30185c2c0ba1e.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--brand-border);
    }
    .hero-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      line-height: 1.35;
      color: #ffffff;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: 1.05rem;
      color: #cbd5e1;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-stack-container {
      position: relative;
      height: 420px;
    }
    .stack-card {
      position: absolute;
      background: var(--brand-card-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--brand-border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
    }
    .stack-card.main-card {
      width: 88%;
      top: 30px;
      left: 6%;
      z-index: 3;
      border-top: 3px solid var(--brand-cyan);
    }
    .stack-card.side-card-1 {
      width: 78%;
      top: 0;
      left: 0;
      z-index: 1;
      opacity: 0.65;
      transform: scale(0.95);
    }
    .stack-card.side-card-2 {
      width: 78%;
      bottom: 0;
      right: 0;
      z-index: 2;
      opacity: 0.75;
      transform: scale(0.97);
    }

    /* 基础现代卡片 */
    .core-card {
      background: var(--brand-surface);
      border: 1px solid var(--brand-border);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .core-card:hover {
      border-color: var(--brand-cyan);
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }
    .card-icon {
      width: 52px;
      height: 52px;
      background: rgba(37, 99, 235, 0.15);
      color: var(--brand-cyan);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
    }
    .core-card h3 {
      font-size: 1.22rem;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 600;
    }
    .core-card p {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      margin-bottom: 0;
    }

    /* 时段状态卡 */
    .schedule-bar {
      display: flex;
      gap: 16px;
      background: var(--brand-surface);
      border: 1px solid var(--brand-border);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .schedule-slot {
      flex: 1;
      border-right: 1px solid var(--brand-border);
      padding-right: 14px;
    }
    .schedule-slot:last-child {
      border-right: none;
      padding-right: 0;
    }
    .slot-time {
      font-family: monospace;
      font-size: 1.1rem;
      color: var(--brand-cyan);
      margin-bottom: 6px;
    }
    .slot-meta {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 专家工程师条 */
    .team-avatar-box {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: #1e293b;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: #38bdf8;
      margin-bottom: 16px;
      border: 2px solid var(--brand-border-light);
    }

    /* 指标数据条 */
    .metric-item {
      text-align: center;
      padding: 20px;
      background: var(--brand-surface);
      border: 1px solid var(--brand-border);
      border-radius: var(--radius-md);
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--brand-cyan);
      margin-bottom: 4px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 资讯图文列表 */
    .news-card-img {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 16px;
      height: 180px;
    }
    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .core-card:hover .news-card-img img {
      transform: scale(1.05);
    }

    /* 预约留资表单卡 */
    .reserve-box {
      background: linear-gradient(145deg, #131b2e, #0c1220);
      border: 1px solid var(--brand-border-light);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-md);
    }
    .form-input-control {
      width: 100%;
      background: #090d16;
      border: 1px solid var(--brand-border);
      color: #fff;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
    }
    .form-input-control:focus {
      border-color: var(--brand-accent);
      outline: none;
      box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background: #070a12;
      border-top: 1px solid var(--brand-border);
      padding: 60px 0 30px;
      color: var(--text-muted);
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-links li a:hover {
      color: #fff;
    }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.85rem;
      text-align: center;
    }

    /* 响应式调整 */
    @media screen and (max-width: 1024px) {
      .hero-stack-container { height: 380px; }
      .hero-h1 { font-size: 1.9rem; }
    }
    @media screen and (max-width: 768px) {
      .channel-nav { display: none; }
      .mobile-menu-toggle { display: block !important; }
      .hero-stack-container { display: none; }
      .schedule-bar { flex-direction: column; }
      .schedule-slot { border-right: none; border-bottom: 1px solid var(--brand-border); padding-bottom: 12px; margin-bottom: 12px; }
      .schedule-slot:last-child { border-bottom: none; margin-bottom: 0; }
      .reserve-box { padding: 24px; }
    }
    .mobile-menu-toggle { display: none; font-size: 1.4rem; color: #fff; background: none; border: none; cursor: pointer; }

/* roulang page: category1 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --brand-cyan: #06b6d4;
      --brand-border: #1e293b;
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }

    /* 滚动收缩双层导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-bottom {
      padding: 12px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .site-header.scrolled .header-bottom {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .nav-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
    }
    .nav-brand {
      font-size: 19px;
      font-weight: 800;
      color: #fff;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .nav-brand i {
      color: var(--primary);
      text-shadow: 0 0 10px var(--primary);
    }
    .channel-nav {
      display: flex;
      gap: 16px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .channel-nav li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .channel-nav li a:hover,
    .channel-nav li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-action {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      font-size: 13px;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 12px var(--primary-glow);
    }
    .btn-action:hover {
      box-shadow: 0 0 20px var(--primary);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* AI分类专有 Hero: 文档帮助中心 + 搜索 + 热门Chips */
    .docs-hero {
      padding: 70px 0 60px;
      background: radial-gradient(circle at top center, rgba(0, 240, 255, 0.08), transparent 70%),
                  linear-gradient(180deg, #0a0d14 0%, #0d121f 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.25);
      margin-bottom: 18px;
    }
    .docs-h1 {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 16px;
      background: linear-gradient(90deg, #ffffff 30%, #94a3b8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .docs-sublead {
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 30px;
      font-size: 15px;
      line-height: 1.7;
    }
    .search-matrix {
      max-width: 640px;
      margin: 0 auto 20px;
      position: relative;
    }
    .search-matrix input {
      width: 100%;
      height: 52px;
      background: rgba(17, 23, 38, 0.9);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 0 54px 0 20px;
      color: #fff;
      font-size: 15px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.4);
      outline: none;
      transition: var(--transition);
    }
    .search-matrix input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 18px var(--primary-glow);
    }
    .search-matrix button {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      background: none;
      border: none;
      color: var(--primary);
      font-size: 18px;
      cursor: pointer;
    }
    .hot-chips {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      font-size: 13px;
    }
    .hot-chips span { color: var(--text-faint); margin-right: 4px; line-height: 28px; }
    .chip-item {
      background: rgba(22, 31, 54, 0.8);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      padding: 3px 12px;
      border-radius: 20px;
      transition: var(--transition);
      cursor: pointer;
    }
    .chip-item:hover {
      border-color: var(--primary);
      color: #fff;
      background: var(--primary-dim);
    }

    /* 模块通用 */
    .module-section {
      padding: 70px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-header-compact {
      margin-bottom: 40px;
    }
    .section-tag {
      font-size: 12px;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      font-weight: 700;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 14px;
      max-width: 680px;
    }

    /* 架构指标板 (非对称卡片) */
    .arch-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      height: 100%;
      position: relative;
      overflow: hidden;
    }
    .arch-panel:hover {
      border-color: var(--border-glow);
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
    }
    .arch-panel::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--primary);
      opacity: 0;
      transition: var(--transition);
    }
    .arch-panel:hover::before { opacity: 1; }
    .panel-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 240, 255, 0.1);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      margin-bottom: 18px;
    }
    .panel-title {
      font-size: 17px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .panel-text {
      color: var(--text-muted);
      font-size: 13.5px;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .panel-meta {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
      font-size: 12.5px;
      color: var(--text-faint);
    }
    .panel-meta strong { color: var(--primary); font-weight: 600; }

    /* 图文技术解析区块 */
    .tech-media-block {
      background: var(--bg-card-alt);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-glow);
      overflow: hidden;
      padding: 36px;
    }
    .tech-visual img {
      width: 100%;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: 0 12px 30px rgba(0,0,0,0.5);
      object-fit: cover;
      max-height: 380px;
    }
    .spec-badge-group {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin: 20px 0;
    }
    .spec-badge {
      background: rgba(2, 132, 199, 0.15);
      border: 1px solid rgba(56, 189, 248, 0.3);
      color: #38bdf8;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 流程与步骤 (排版变体) */
    .step-track-item {
      position: relative;
      padding: 24px;
      background: rgba(17, 23, 38, 0.6);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 20px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .step-seq {
      width: 36px;
      height: 36px;
      background: var(--primary-dim);
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      flex-shrink: 0;
      font-size: 14px;
    }
    .step-content h4 {
      font-size: 16px;
      color: #fff;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .step-content p {
      margin: 0;
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 节点状态与遥测表格面板 */
    .telemetry-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      font-size: 13.5px;
    }
    .telemetry-table th {
      background: rgba(22, 31, 54, 0.9);
      padding: 14px 18px;
      text-align: left;
      color: var(--text-muted);
      font-weight: 600;
      border-bottom: 1px solid var(--border-color);
    }
    .telemetry-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      color: var(--text-main);
    }
    .telemetry-table tr:hover td {
      background: rgba(0, 240, 255, 0.03);
    }
    .node-online {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #10b981;
      font-weight: 600;
    }

    /* 容灾配置对照卡 */
    .config-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 20px;
    }
    .config-card h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .param-list {
      list-style: none;
      padding: 0;
      margin: 0;
      font-size: 13px;
    }
    .param-list li {
      display: flex;
      justify-content: space-between;
      padding: 8px 0;
      border-bottom: 1px dashed rgba(255,255,255,0.06);
      color: var(--text-muted);
    }
    .param-list li span:last-child {
      color: var(--text-main);
      font-family: monospace;
    }

    /* 常见答疑板块 */
    .faq-block {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      margin-bottom: 16px;
    }
    .faq-q {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .faq-q i { color: var(--primary); font-size: 14px; }
    .faq-a {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* 收口转化条 */
    .cta-banner {
      background: radial-gradient(circle at center, rgba(0, 112, 243, 0.25) 0%, rgba(10, 13, 20, 0.95) 80%),
                  url('/assets/images/99aeacba415714df.webp') center/cover no-repeat;
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 48px 30px;
      text-align: center;
      margin: 40px 0 20px;
    }
    .cta-banner h3 {
      font-size: 1.9rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .cta-banner p {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto 24px;
    }

    /* Footer 规范 */
    .site-footer {
      background: #070a10;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px;
      margin-top: 40px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li { margin-bottom: 10px; }
    .footer-links li a {
      color: var(--text-muted);
      font-size: 13.5px;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      margin-top: 40px;
      padding-top: 20px;
      font-size: 12.5px;
      color: var(--text-faint);
    }

    /* 响应式断点 */
    @media screen and (max-width: 1024px) {
      .channel-nav { gap: 10px; }
      .channel-nav li a { font-size: 13px; padding: 4px 8px; }
    }
    @media screen and (max-width: 768px) {
      .mobile-menu-toggle { display: block; }
      .channel-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
      }
      .channel-nav.show { display: flex; }
      .docs-h1 { font-size: 1.8rem; }
      .tech-media-block { padding: 20px; }
      .header-top { display: none; }
    }

/* roulang page: category2 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --brand-cyan: #06b6d4;
      --brand-border: #1e293b;
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }
    
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
    }
    .header-bottom {
      padding: 12px 0;
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .nav-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
    }
    .nav-brand {
      font-size: 19px;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .nav-brand i {
      color: var(--primary);
      text-shadow: 0 0 10px var(--primary);
    }
    .channel-nav {
      display: flex;
      gap: 16px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .channel-nav li a {
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .channel-nav li a:hover,
    .channel-nav li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-action {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      box-shadow: 0 0 12px var(--primary-glow);
    }
    .btn-action:hover {
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-glow);
      color: #fff;
      padding: 6px 10px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* 内页专用 Hero 对比选型 */
    .matrix-hero {
      position: relative;
      padding: 65px 0 80px;
      background: linear-gradient(180deg, rgba(10, 13, 20, 0.88) 0%, rgba(10, 13, 20, 0.98) 100%), url('/assets/images/99aeacba415714df.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .matrix-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px;
    }
    .matrix-badge {
      display: inline-block;
      padding: 5px 14px;
      border-radius: 20px;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
      color: var(--primary);
      font-size: 13px;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .matrix-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .matrix-lead {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.8;
      margin: 0 auto;
    }
    .matrix-pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }
    .plan-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .plan-card.highlight {
      background: var(--bg-card-alt);
      border-color: rgba(0, 240, 255, 0.5);
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.18);
      transform: translateY(-8px);
    }
    .plan-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(90deg, var(--primary), var(--accent));
      color: #050b14;
      font-weight: 700;
      font-size: 11px;
      padding: 3px 14px;
      border-radius: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .plan-name {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }
    .plan-desc {
      font-size: 13px;
      color: var(--text-faint);
      margin-bottom: 20px;
      min-height: 38px;
    }
    .plan-spec {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .plan-spec span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: normal;
    }
    .plan-features {
      list-style: none;
      margin: 0 0 24px 0;
      padding: 0;
      flex-grow: 1;
    }
    .plan-features li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .plan-features li i {
      color: var(--primary);
      font-size: 12px;
    }
    .btn-plan {
      display: block;
      text-align: center;
      padding: 10px 0;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      border: 1px solid var(--border-glow);
      color: var(--text-main);
      background: rgba(255, 255, 255, 0.03);
    }
    .plan-card.highlight .btn-plan {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border: none;
      color: #050b14 !important;
      font-weight: 700;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    /* 通用板块 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .section-block.alt-bg {
      background: rgba(17, 23, 38, 0.35);
    }
    .block-header {
      margin-bottom: 45px;
    }
    .block-subtitle {
      font-size: 13px;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      font-weight: 600;
    }
    .block-title {
      font-size: 26px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }
    .block-desc {
      color: var(--text-muted);
      font-size: 14.5px;
      max-width: 650px;
      line-height: 1.7;
    }

    /* 叙事转化流组件样式 */
    .trouble-card {
      background: rgba(22, 31, 54, 0.4);
      border: 1px solid var(--border-color);
      border-left: 3px solid #ef4444;
      border-radius: var(--radius-sm);
      padding: 20px;
      margin-bottom: 20px;
      transition: var(--transition);
    }
    .trouble-card:hover {
      background: rgba(22, 31, 54, 0.8);
      transform: translateX(4px);
    }
    .trouble-title {
      font-size: 16px;
      font-weight: 700;
      color: #fca5a5;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .solution-box {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
    }
    .solution-box i {
      font-size: 28px;
      color: var(--primary);
      margin-bottom: 16px;
      display: inline-block;
    }

    .step-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-number {
      position: absolute;
      top: -12px;
      left: 20px;
      background: var(--primary);
      color: #050b14;
      width: 26px;
      height: 26px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 12px;
    }

    .data-kpi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .kpi-card {
      background: rgba(17, 23, 38, 0.8);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 26px;
      text-align: center;
    }
    .kpi-val {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      font-family: monospace;
    }
    .kpi-label {
      color: var(--text-muted);
      font-size: 13px;
    }

    .user-profile-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .profile-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .profile-img-wrap {
      height: 170px;
      overflow: hidden;
    }
    .profile-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .profile-card:hover .profile-img-wrap img {
      transform: scale(1.05);
    }
    .profile-body {
      padding: 20px;
    }

    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .site-footer {
      background: #06090e;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
    }
    .footer-bottom {
      margin-top: 40px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-faint);
    }

    @media (max-width: 1024px) {
      .matrix-pricing-grid,
      .step-track,
      .data-kpi-grid,
      .user-profile-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .matrix-pricing-grid,
      .step-track,
      .data-kpi-grid,
      .user-profile-grid {
        grid-template-columns: 1fr;
      }
      .channel-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0a0d14;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
      }
      .channel-nav.show {
        display: flex;
      }
      .mobile-menu-toggle {
        display: inline-block;
      }
      .matrix-h1 {
        font-size: 1.8rem;
      }
    }

/* roulang page: category4 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --brand-primary: #0f172a;
      --brand-accent: #2563eb;
      --brand-cyan: #06b6d4;
      --brand-border: #1e293b;
    }

    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }

    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }

    /* 滚动收缩双层导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-bottom {
      padding: 12px 0;
      transition: var(--transition);
    }
    .nav-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 10px #10b981;
      display: inline-block;
    }
    .nav-brand {
      font-size: 18px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .nav-brand i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .channel-nav {
      display: flex;
      gap: 20px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .channel-nav li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .channel-nav li a:hover,
    .channel-nav li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-action {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      font-size: 13px;
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 15px var(--primary-glow);
      transition: var(--transition);
    }
    .btn-action:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-glow);
      color: #fff;
      font-size: 18px;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* 视频官网版式 Hero */
    .video-hero-wrapper {
      position: relative;
      min-height: 480px;
      display: flex;
      align-items: center;
      background: url('/assets/images/50c30185c2c0ba1e.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--border-glow);
      overflow: hidden;
    }
    .video-hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(circle at center, rgba(10, 13, 20, 0.75) 0%, rgba(10, 13, 20, 0.96) 80%);
      z-index: 1;
    }
    .video-hero-content {
      position: relative;
      z-index: 2;
      padding: 60px 0;
      text-align: center;
    }
    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 14px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 20px;
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .hero-h1 {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
      background: linear-gradient(90deg, #ffffff, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      max-width: 820px;
      margin: 0 auto 30px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .hero-controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-play-trigger {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid var(--border-glow);
      color: #fff;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      backdrop-filter: blur(8px);
      transition: var(--transition);
      cursor: pointer;
    }
    .btn-play-trigger:hover {
      background: rgba(0, 240, 255, 0.15);
      border-color: var(--primary);
      color: #fff;
    }
    .btn-play-trigger i {
      color: var(--primary);
      font-size: 16px;
    }

    /* 板块结构标准 */
    .flow-section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .flow-section.alt-bg {
      background: var(--bg-card);
    }
    .section-head {
      margin-bottom: 45px;
    }
    .section-head.center {
      text-align: center;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    /* 交互卡片与面板 */
    .flow-card {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: var(--transition);
    }
    .flow-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    }
    .flow-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      margin-bottom: 18px;
    }
    .flow-card-title {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .flow-card-text {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* 状态遥测仪表台 */
    .telemetry-board {
      background: #090e18;
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.6);
    }
    .telemetry-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .telemetry-row:last-child {
      border-bottom: none;
    }
    .probe-tag {
      font-size: 12px;
      padding: 2px 8px;
      background: rgba(16, 185, 129, 0.15);
      border: 1px solid rgba(16, 185, 129, 0.4);
      color: #10b981;
      border-radius: 4px;
    }

    /* 指标统计条 */
    .metric-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: rgba(17, 23, 38, 0.6);
      padding: 20px;
      text-align: center;
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 证言反馈块 */
    .testimonial-card {
      background: var(--bg-card);
      border-left: 3px solid var(--primary);
      padding: 22px;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      height: 100%;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }
    .user-avatar-tag {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--border-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 13px;
      color: #fff;
    }

    /* 资讯列表 */
    .news-strip {
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }
    .news-strip:hover {
      border-color: rgba(0, 240, 255, 0.4);
      background: #19243e;
    }

    /* 尾部规范与首页统一 */
    .site-footer {
      background: #060911;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 25px;
      color: var(--text-muted);
    }
    .footer-col h4 {
      font-size: 15px;
      color: #fff;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links li a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }
    .badge {
      display: inline-block;
      padding: 4px 10px;
      font-size: 11px;
      border-radius: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 40px;
      padding-top: 20px;
      font-size: 12px;
      text-align: center;
      color: #64748b;
    }

    @media (max-width: 1024px) {
      .channel-nav {
        display: none;
      }
      .channel-nav.show {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0a0d14;
        border-bottom: 1px solid var(--border-glow);
        padding: 16px;
        gap: 10px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-h1 {
        font-size: 1.9rem;
      }
    }

/* roulang page: category3 */
:root {
      --primary: #00f0ff;
      --primary-dim: rgba(0, 240, 255, 0.15);
      --primary-glow: rgba(0, 240, 255, 0.4);
      --secondary: #7928ca;
      --accent: #0070f3;
      --bg-dark: #0a0d14;
      --bg-card: #111726;
      --bg-card-alt: #161f36;
      --border-color: #1e293b;
      --border-glow: #2a3d66;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-faint: #64748b;
      --brand-cyan: #06b6d4;
      --brand-border: #1e3a5f;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      font-size: 15px;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: #fff; text-shadow: 0 0 8px var(--primary-glow); }

    /* 滚动收缩双层导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .header-top {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .header-bottom {
      padding: 12px 0;
      transition: var(--transition);
    }
    .site-header.scrolled .header-top {
      display: none;
    }
    .site-header.scrolled .header-bottom {
      padding: 8px 0;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
    .nav-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10b981;
    }
    .nav-brand {
      font-size: 19px;
      font-weight: 800;
      color: #fff;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .nav-brand i {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary);
    }
    .channel-nav {
      display: flex;
      gap: 18px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .channel-nav li a {
      color: var(--text-muted);
      font-weight: 500;
      font-size: 14px;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
    }
    .channel-nav li a:hover,
    .channel-nav li a.active {
      color: #fff;
      background: var(--primary-dim);
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .btn-action {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      font-size: 14px;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      box-shadow: 0 0 15px var(--primary-glow);
    }
    .btn-action:hover {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 20px;
      cursor: pointer;
    }

    /* 拼团转化 Hero 区块 */
    .group-hero-section {
      position: relative;
      padding: 70px 0 80px;
      background: linear-gradient(180deg, rgba(10, 13, 20, 0.88) 0%, rgba(10, 13, 20, 0.98) 100%), url('/assets/images/99aeacba415714df.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-color);
    }
    .group-hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 50px;
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .hero-h1 {
      font-size: 2.4rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
      background: linear-gradient(90deg, #ffffff, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-summary {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 28px;
      max-width: 760px;
    }
    .group-counter-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    }
    .group-progress-wrap {
      margin-bottom: 20px;
    }
    .progress-bar-bg {
      height: 8px;
      background: rgba(255,255,255,0.08);
      border-radius: 4px;
      overflow: hidden;
      margin: 10px 0;
    }
    .progress-bar-fill {
      width: 82%;
      height: 100%;
      background: linear-gradient(90deg, var(--brand-cyan), var(--primary));
      box-shadow: 0 0 10px var(--primary);
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-create-group {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #050b14 !important;
      font-weight: 700;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 0 15px var(--primary-glow);
    }
    .btn-join-group {
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--border-glow);
      color: var(--text-main);
      font-weight: 600;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-join-group:hover {
      border-color: var(--primary);
      background: var(--primary-dim);
    }

    /* 板块基础与排版变体 */
    .content-section {
      padding: 65px 0;
      position: relative;
    }
    .section-alt {
      background: var(--bg-card);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-tag {
      font-size: 13px;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      max-width: 700px;
    }

    /* 叙事流组件 */
    .pain-card {
      background: rgba(17, 23, 38, 0.6);
      border: 1px solid #331f28;
      border-left: 4px solid #ef4444;
      border-radius: var(--radius-sm);
      padding: 22px;
      height: 100%;
    }
    .pain-card h4 {
      color: #fca5a5;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .sol-card {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      height: 100%;
    }
    .sol-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
      box-shadow: 0 10px 25px rgba(0, 240, 255, 0.15);
    }
    .sol-card .icon-box {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background: var(--primary-dim);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .timeline-steps {
      border-left: 2px dashed var(--border-glow);
      padding-left: 26px;
      margin-left: 10px;
    }
    .step-item {
      position: relative;
      margin-bottom: 30px;
    }
    .step-item::before {
      content: '';
      position: absolute;
      left: -32px;
      top: 4px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
    }
    .step-item h4 {
      font-size: 17px;
      color: #fff;
      margin-bottom: 6px;
    }

    .metric-grid-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }
    .metric-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
    }
    .metric-label {
      color: var(--text-muted);
      font-size: 13px;
    }

    .testimonial-box {
      background: rgba(19, 27, 46, 0.7);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }

    .article-snippet-card {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .article-snippet-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .article-snippet-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .article-body {
      padding: 20px;
      flex: 1;
    }

    /* 转化收口 */
    .cta-band {
      background: linear-gradient(135deg, rgba(16, 24, 39, 0.95), rgba(7, 13, 25, 0.95)), url('/assets/images/b8f04d1ec62255a6.webp');
      background-size: cover;
      background-position: center;
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      margin: 40px 0;
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.08);
    }

    /* 页脚对齐 */
    .site-footer {
      background: #060911;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 25px;
      color: var(--text-muted);
    }
    .footer-col h4 {
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom-bar {
      margin-top: 35px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 13px;
    }

    @media screen and (max-width: 800px) {
      .channel-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0a0d14;
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
      }
      .channel-nav.show {
        display: flex;
      }
      .mobile-menu-toggle {
        display: inline-block;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
    }