/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-hover: #084298;
      --primary-soft: #EBF2FE;
      --navy: #0F172A;
      --navy-light: #1E293B;
      --accent-green: #10B981;
      --accent-green-soft: #D1FAE5;
      --bg-slate: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 10px 30px -4px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 16px 36px -6px rgba(10, 88, 202, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-slate);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部双行导航 */
    .topbar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 13px;
      color: var(--text-muted);
      height: 38px;
      display: flex;
      align-items: center;
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
    .topbar-links {
      display: flex;
      gap: 20px;
    }

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      height: 72px;
      display: flex;
      align-items: center;
      transition: var(--transition);
    }
    .header-nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--navy);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), #003AA8);
      color: #fff;
      width: 36px;
      height: 36px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }
    .nav-menu {
      display: flex;
      gap: 32px;
      list-style: none;
      align-items: center;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: #475569;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      min-height: 44px;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(10, 88, 202, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(10, 88, 202, 0.35);
    }
    .btn-outline {
      border-color: var(--border-color);
      background-color: #fff;
      color: var(--navy);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 移动端菜单按钮 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      color: var(--navy);
      cursor: pointer;
    }

    /* 通用Section结构 */
    .section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 14px;
      background-color: var(--primary-soft);
      color: var(--primary);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--navy);
      line-height: 1.3;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 杂志分栏 */
    .hero-section {
      padding: 60px 0 90px;
      background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--navy);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-lead {
      font-size: 16px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-telemetry-pill {
      display: inline-flex;
      align-items: center;
      gap: 24px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 14px 24px;
      box-shadow: var(--shadow-sm);
    }
    .telemetry-item {
      display: flex;
      flex-direction: column;
    }
    .telemetry-val {
      font-size: 20px;
      font-weight: 700;
      color: var(--navy);
    }
    .telemetry-label {
      font-size: 12px;
      color: var(--text-muted);
    }
    .hero-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      position: relative;
    }
    .hero-media-wrapper {
      position: relative;
      background-color: var(--navy);
    }
    .hero-media-wrapper img {
      width: 100%;
      height: 280px;
      object-fit: cover;
      opacity: 0.95;
    }
    .hero-media-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(8px);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-card-content {
      padding: 24px;
    }
    .hero-card-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    /* 2. 媒体流轨板块 */
    .stream-track-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .stream-node-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .stream-node-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(10, 88, 202, 0.3);
    }
    .stream-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background-color: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }
    .stream-node-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--navy);
    }
    .stream-node-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 赛事热点与推流技术优势 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-box:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .feature-box h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--navy);
      margin: 14px 0 10px;
    }
    .feature-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .feature-tag-list {
      margin-top: 18px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .tag-chip {
      font-size: 11px;
      background: #F1F5F9;
      color: #475569;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 4. 类型入口墙 (协议与传输矩阵) */
    .protocol-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .protocol-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      overflow: hidden;
      border-left: 4px solid var(--primary);
    }
    .protocol-latency {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-green);
      background: var(--accent-green-soft);
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }
    .protocol-item h3 {
      font-size: 18px;
      color: var(--navy);
      margin-bottom: 8px;
    }
    .protocol-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 5. 战术多视角矩阵 (片单分区形态) */
    .tactics-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .tactics-preview {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .tactics-preview img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .tactics-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(15, 23, 42, 0.1) 0%, rgba(15, 23, 42, 0.8) 100%);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 24px;
      color: #FFFFFF;
    }
    .tactics-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .tactic-row {
      display: flex;
      gap: 16px;
      padding: 16px;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .tactic-icon {
      font-size: 20px;
      color: var(--primary);
      margin-top: 2px;
    }

    /* 6. 深色高并发调度展示区 */
    .dark-highlight-section {
      background-color: #0A1128;
      color: #FFFFFF;
      padding: 90px 0;
      border-top: 1px solid #1E293B;
      border-bottom: 1px solid #1E293B;
    }
    .dark-highlight-section .section-title {
      color: #FFFFFF;
    }
    .dark-highlight-section .section-desc {
      color: #94A3B8;
    }
    .dark-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .dark-stat-card {
      background: #111C3A;
      border: 1px solid #233159;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      text-align: center;
    }
    .dark-stat-num {
      font-size: 36px;
      font-weight: 800;
      color: #38BDF8;
      margin-bottom: 8px;
      font-feature-settings: "tnum";
    }
    .dark-stat-name {
      font-size: 15px;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 6px;
    }
    .dark-stat-desc {
      font-size: 13px;
      color: #94A3B8;
    }

    /* 7. 方案选型与架构评分榜 */
    .benchmark-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }
    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .benchmark-table th, .benchmark-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .benchmark-table th {
      background-color: #F8FAFC;
      font-weight: 700;
      color: var(--navy);
    }
    .benchmark-table tr:last-child td {
      border-bottom: none;
    }
    .col-highlight {
      background-color: rgba(10, 88, 202, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 8. 前后对比区 (Before / After) */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .compare-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .compare-card.before {
      border-top: 4px solid #94A3B8;
    }
    .compare-card.after {
      border-top: 4px solid var(--accent-green);
      background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
    }
    .compare-list {
      list-style: none;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .compare-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 14px;
      line-height: 1.6;
    }

    /* 9. 行业应用场景矩阵 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .scenario-thumb {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .scenario-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .scenario-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--navy);
      margin-bottom: 10px;
    }
    .scenario-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    /* 10. 用户口碑墙 (Testimonials) */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 14px;
    }
    .testimonial-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .client-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .client-avatar-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .client-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--navy);
    }
    .client-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 11. 资讯动态列表 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .news-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .news-date {
      font-size: 12px;
      color: #94A3B8;
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--navy);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. 话题标签云 */
    .tags-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .tag-cloud-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }
    .cloud-tag {
      background: #F1F5F9;
      color: #334155;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 500;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .cloud-tag:hover {
      background: var(--primary-soft);
      color: var(--primary);
      border-color: rgba(10, 88, 202, 0.2);
      transform: translateY(-2px);
    }

    /* 13. 开通/接入转化收口行动 (Single Action Closing) */
    .cta-banner {
      background: linear-gradient(135deg, #0A58CA 0%, #003699 100%);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: #FFFFFF;
      box-shadow: 0 20px 40px -10px rgba(10, 88, 202, 0.4);
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .cta-banner h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .cta-banner p {
      font-size: 15px;
      color: #E2E8F0;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-input-group {
      display: flex;
      gap: 8px;
    }
    .cta-input {
      flex: 1;
      height: 48px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.3);
      background: rgba(255, 255, 255, 0.12);
      padding: 0 16px;
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
      backdrop-filter: blur(4px);
    }
    .cta-input::placeholder {
      color: #CBD5E1;
    }
    .cta-input:focus {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.2);
    }
    .btn-light {
      background-color: #FFFFFF;
      color: var(--primary);
      font-weight: 700;
      border: none;
      padding: 0 24px;
      height: 48px;
    }
    .btn-light:hover {
      background-color: #F8FAFC;
      color: var(--primary-hover);
      transform: translateY(-2px);
    }
    .cta-guarantee {
      font-size: 12px;
      color: #CBD5E1;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 统一页脚 */
    .site-footer {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 70px;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 50px;
      border-bottom: 1px solid #1E293B;
    }
    .footer-brand h3 {
      font-size: 18px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 18px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 13px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-bottom {
      padding: 24px 0;
      font-size: 12px;
      color: #475569;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-legal-links {
      display: flex;
      gap: 18px;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .tactics-split {
        grid-template-columns: 1fr;
      }
      .stream-track-grid, .protocol-grid, .dark-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-grid-3, .scenario-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cta-banner {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .section {
        padding: 60px 0;
      }
      .feature-grid-3, .scenario-grid, .testimonial-grid, .news-grid, .compare-grid {
        grid-template-columns: 1fr;
      }
      .cta-input-group {
        flex-direction: column;
      }
      .btn-light {
        width: 100%;
      }
      .hero-telemetry-pill {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
    }

    @media (max-width: 520px) {
      .stream-track-grid, .protocol-grid, .dark-grid-4 {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }