/* roulang page: index */
:root {
      --primary-grad: linear-gradient(135deg, #1A365D 0%, #0D5C75 50%, #00B4D8 100%);
      --accent-orange: #FF6B35;
      --accent-green: #06D6A0;
      --dark-navy: #0B132B;
      --card-bg: #FFFFFF;
      --text-dark: #0F172A;
      --text-muted: #334155;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --bg-alt: #F8FAFC;
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 8px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 20px 30px -4px rgba(13, 92, 117, 0.14);
      --container-max: 1240px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-alt);
      color: var(--text-dark);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 顶部通知条 */
    .top-bar {
      background: var(--dark-navy);
      color: #94A3B8;
      font-size: 0.85rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-green);
      border-radius: var(--radius-full);
      box-shadow: 0 0 0 0 rgba(6, 214, 160, 0.7);
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 214, 160, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(6, 214, 160, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 214, 160, 0); }
    }
    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      color: #0F172A;
      letter-spacing: -0.5px;
    }
    .site-logo-icon {
      width: 38px;
      height: 38px;
      background: var(--primary-grad);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-size: 1rem;
      box-shadow: 0 4px 10px rgba(0, 180, 216, 0.3);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #0D5C75;
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: #0D5C75;
      border-radius: 2px;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-size: 0.92rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      min-height: 44px;
    }
    .btn-gradient {
      background: var(--primary-grad);
      color: #FFF;
      box-shadow: 0 4px 15px rgba(13, 92, 117, 0.25);
    }
    .btn-gradient:hover {
      box-shadow: 0 8px 24px rgba(0, 180, 216, 0.4);
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: #CBD5E1;
      color: var(--text-dark);
      background: #FFF;
    }
    .btn-outline:hover {
      border-color: #0D5C75;
      color: #0D5C75;
      background: #F1F5F9;
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      padding: 8px;
    }
    /* 公共 Section 规范 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--dark-navy);
      color: #FFF;
    }
    .section-white {
      background-color: #FFFFFF;
    }
    .section-alt {
      background-color: #F8FAFC;
    }
    .section-head {
      margin-bottom: 48px;
      max-width: 820px;
    }
    .section-head.text-center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: rgba(13, 92, 117, 0.08);
      color: #0D5C75;
      border-radius: var(--radius-full);
      font-size: 0.82rem;
      font-weight: 700;
      margin-bottom: 14px;
      border: 1px solid rgba(13, 92, 117, 0.15);
    }
    .section-dark .badge-pill {
      background: rgba(255, 255, 255, 0.1);
      color: #38BDF8;
      border-color: rgba(255, 255, 255, 0.2);
    }
    .section-title {
      font-size: clamp(1.8rem, 3.2vw, 2.5rem);
      font-weight: 800;
      line-height: 1.28;
      margin-bottom: 16px;
      color: var(--text-dark);
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    /* 板块 1：Hero 直播预告与倒计时 */
    .hero-live {
      background: linear-gradient(180deg, #FFFFFF 0%, #EFF6FF 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-blend-mode: overlay;
      padding: 90px 0 70px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(2.2rem, 4.5vw, 3.4rem);
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 20px;
      color: #0F172A;
    }
    .hero-p {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 30px;
    }
    .badge-data {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #FFFFFF;
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
      border: 1px solid var(--border-color);
    }
    /* 预告封面卡片 */
    .live-preview-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 15px 35px -5px rgba(13, 92, 117, 0.18);
      border: 1px solid #E2E8F0;
      position: relative;
    }
    .preview-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .status-tag-live {
      background: #FEE2E2;
      color: #EF4444;
      font-weight: 700;
      font-size: 0.8rem;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .preview-cover-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
      margin-bottom: 20px;
      background: #000;
    }
    .preview-cover-box img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      opacity: 0.88;
    }
    .stream-overlay {
      position: absolute;
      bottom: 12px;
      left: 12px;
      right: 12px;
      background: rgba(15, 23, 42, 0.8);
      backdrop-filter: blur(8px);
      padding: 8px 14px;
      border-radius: 8px;
      color: #FFF;
      font-size: 0.82rem;
      display: flex;
      justify-content: space-between;
    }
    .countdown-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-bottom: 20px;
      text-align: center;
    }
    .count-box {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      padding: 10px 4px;
      border-radius: var(--radius-sm);
    }
    .count-num {
      display: block;
      font-size: 1.35rem;
      font-weight: 800;
      color: #0D5C75;
    }
    .count-label {
      font-size: 0.72rem;
      color: var(--text-light);
    }
    /* 板块 2：合集目录 */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .catalog-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .catalog-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .catalog-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: rgba(13, 92, 117, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: #0D5C75;
      margin-bottom: 18px;
    }
    .catalog-card h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
    }
    .catalog-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    /* 板块 3：核心技术底座参数 */
    .tech-base-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .spec-table-list {
      list-style: none;
      display: grid;
      gap: 16px;
    }
    .spec-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 14px 20px;
      background: #FFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .spec-item span:first-child {
      font-weight: 600;
      color: var(--text-muted);
    }
    .spec-item span:last-child {
      font-weight: 700;
      color: #0D5C75;
      background: #F1F5F9;
      padding: 4px 10px;
      border-radius: 6px;
    }
    /* 板块 4：实时吞吐监控看板 */
    .metrics-dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
      overflow: hidden;
    }
    .metric-panel::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-grad);
    }
    .metric-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: #38BDF8;
      display: block;
      margin: 10px 0 4px;
    }
    .metric-lbl {
      color: #94A3B8;
      font-size: 0.9rem;
    }
    /* 板块 5：核心优势矩阵 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .matrix-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .matrix-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--accent-orange);
      background: #FFF7ED;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    /* 板块 6：推荐引擎产品梯队 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .product-box {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .product-box.featured {
      border: 2px solid #00B4D8;
      box-shadow: 0 10px 30px rgba(0, 180, 216, 0.15);
    }
    .product-features {
      list-style: none;
      margin: 20px 0;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
      display: grid;
      gap: 12px;
    }
    .product-features li {
      font-size: 0.92rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    /* 板块 7：深色架构剖析与流调度 */
    .arch-flow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .arch-step-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-idx {
      width: 32px;
      height: 32px;
      border-radius: var(--radius-full);
      background: rgba(0, 180, 216, 0.2);
      color: #38BDF8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 14px;
    }
    /* 板块 8：全宽数据横带 */
    .stat-strip {
      background: var(--primary-grad);
      color: #FFF;
      padding: 50px 0;
    }
    .stat-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .strip-num {
      font-size: clamp(2rem, 3.5vw, 3rem);
      font-weight: 900;
      line-height: 1;
      margin-bottom: 8px;
    }
    .strip-desc {
      font-size: 0.95rem;
      opacity: 0.9;
    }
    /* 板块 9：落地场景与工作流 */
    .case-workflow-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .case-img-wrap {
      height: 180px;
      overflow: hidden;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 24px;
    }
    /* 板块 10：资讯与技术演进 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.82rem;
      color: var(--text-light);
      margin-bottom: 12px;
    }
    /* 板块 11：安全审计与合规认证 */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .sec-card {
      background: #FFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }
    .sec-icon {
      font-size: 2rem;
      margin-bottom: 12px;
      display: inline-block;
    }
    /* 板块 12：用户口碑评价墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFF;
      padding: 28px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-full);
      background: var(--primary-grad);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    /* 板块 13：专题索引与技术词条 */
    .topic-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }
    .topic-pill-item {
      background: #FFF;
      border: 1px solid var(--border-color);
      padding: 10px 20px;
      border-radius: var(--radius-full);
      font-size: 0.92rem;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }
    .topic-pill-item:hover {
      border-color: #0D5C75;
      color: #0D5C75;
      background: #F8FAFC;
    }
    /* 转化表单区 */
    .cta-card-box {
      background: var(--primary-grad);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #FFF;
    }
    .cta-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .cta-form {
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      color: var(--text-dark);
      display: grid;
      gap: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
    }
    /* 页脚规范 */
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFF;
      font-size: 1.05rem;
      margin-bottom: 20px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      display: grid;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      text-align: center;
      font-size: 0.82rem;
      color: #64748B;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .tech-base-grid,
      .cta-flex {
        grid-template-columns: 1fr;
      }
      .matrix-grid,
      .products-grid,
      .news-grid,
      .testimonial-grid,
      .case-workflow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-dashboard-grid,
      .arch-flow-grid,
      .security-grid,
      .stat-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-action {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .matrix-grid,
      .products-grid,
      .news-grid,
      .testimonial-grid,
      .case-workflow-grid,
      .metrics-dashboard-grid,
      .arch-flow-grid,
      .security-grid,
      .stat-strip-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .countdown-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .section-wrap {
        padding: 50px 0;
      }
      .cta-card-box {
        padding: 24px;
      }
    }