/* roulang page: index */
:root {
      --bg-main: #060B18;
      --bg-darker: #040711;
      --bg-card: rgba(15, 27, 56, 0.72);
      --bg-card-hover: rgba(23, 40, 78, 0.85);
      --primary-cyan: #00E5FF;
      --primary-green: #00F59B;
      --accent-coral: #FF3B69;
      --text-white: #FFFFFF;
      --text-muted: #94A3B8;
      --text-sub: #64748B;
      --border-cyan: rgba(0, 229, 255, 0.22);
      --border-light: rgba(255, 255, 255, 0.08);
      --glow-cyan: 0 0 25px rgba(0, 229, 255, 0.35);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-stack);
      background-color: var(--bg-main);
      color: var(--text-white);
    }

    body {
      overflow-x: hidden;
      line-height: 1.6;
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(0, 229, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(0, 245, 155, 0.06) 0%, transparent 45%);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.3s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background: var(--bg-darker);
      border-bottom: 1px solid var(--border-light);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-green);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--primary-green);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.2); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }

    header.main-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(6, 11, 24, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-cyan);
    }
    .nav-wrap {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .brand-logo i {
      font-size: 26px;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-green));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-menu a {
      color: var(--text-muted);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary-cyan);
    }
    .nav-menu a.active::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 8px var(--primary-cyan);
    }
    .nav-cta-btn {
      background: linear-gradient(135deg, var(--primary-cyan), #00A3FF);
      color: #060B18 !important;
      font-weight: 700;
      font-size: 14px;
      padding: 10px 22px;
      border-radius: 99px;
      box-shadow: var(--glow-cyan);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.6);
    }
    .menu-toggle {
      display: none;
      font-size: 24px;
      color: #fff;
      background: none;
      border: none;
      cursor: pointer;
    }

    /* 通用板块与排版 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-darker {
      background: var(--bg-darker);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }
    .section-title-wrap {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 56px;
    }
    .badge-sub {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--border-cyan);
      border-radius: 30px;
      color: var(--primary-cyan);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 16px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #fff;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 毛玻璃卡片系统 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.35s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      background: var(--bg-card-hover);
      border-color: rgba(0, 229, 255, 0.6);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 229, 255, 0.12);
    }

    /* 1. 首屏看板 */
    #hero {
      padding: 60px 0 100px;
      background: linear-gradient(180deg, rgba(6, 11, 24, 0.4) 0%, var(--bg-main) 100%),
                  url('/assets/images/6fedec4b90079efa.png') center/cover no-repeat;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #FFFFFF 40%, var(--primary-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-btn-group {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .btn-solid-glow {
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-green));
      color: #060B18;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: 99px;
      font-size: 15px;
      box-shadow: 0 0 25px rgba(0, 245, 155, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      border: none;
      cursor: pointer;
    }
    .btn-solid-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(0, 245, 155, 0.7);
    }
    .btn-outline-glow {
      background: rgba(15, 27, 56, 0.6);
      color: #fff;
      font-weight: 600;
      padding: 14px 30px;
      border-radius: 99px;
      font-size: 15px;
      border: 1px solid var(--border-cyan);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 229, 255, 0.15);
      border-color: var(--primary-cyan);
    }
    .hero-live-card {
      background: rgba(15, 27, 56, 0.85);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(20px);
    }
    .live-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      background: rgba(255, 59, 105, 0.15);
      border: 1px solid var(--accent-coral);
      border-radius: 4px;
      color: var(--accent-coral);
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .match-board {
      background: rgba(6, 11, 24, 0.7);
      border-radius: var(--radius-md);
      padding: 20px;
      margin-bottom: 20px;
      border: 1px solid var(--border-light);
    }
    .match-teams {
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-align: center;
    }
    .team-name {
      font-size: 16px;
      font-weight: 700;
    }
    .match-score {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary-cyan);
      font-family: monospace;
      letter-spacing: 4px;
    }
    .hero-kpi-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      text-align: center;
      padding-top: 14px;
      border-top: 1px solid var(--border-light);
    }
    .kpi-title {
      font-size: 12px;
      color: var(--text-sub);
    }
    .kpi-val {
      font-size: 16px;
      font-weight: 800;
      color: var(--primary-green);
    }

    /* 2. 技术底座与认证 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .tech-pill-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }
    .tech-pill-item {
      display: flex;
      gap: 16px;
      background: rgba(15, 27, 56, 0.5);
      padding: 18px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary-cyan);
    }
    .tech-pill-item i {
      font-size: 22px;
      color: var(--primary-cyan);
      margin-top: 2px;
    }
    .tech-pill-item h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 6px;
    }
    .tech-pill-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 核心优势六宫格 */
    .feature-grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feat-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(0, 229, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary-cyan);
      margin-bottom: 20px;
      border: 1px solid var(--border-cyan);
    }
    .glass-card h3 {
      font-size: 19px;
      color: #fff;
      margin-bottom: 12px;
    }
    .glass-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 4. 终端矩阵 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .product-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
      border-bottom: 1px solid var(--border-light);
    }
    .product-body {
      padding: 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-specs {
      margin-top: 18px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: var(--primary-green);
    }

    /* 5. 闭环架构流程 */
    .process-flow {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      position: relative;
    }
    .process-card {
      background: rgba(11, 21, 43, 0.85);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }
    .process-step-num {
      font-size: 40px;
      font-weight: 900;
      color: rgba(0, 229, 255, 0.2);
      position: absolute;
      top: 20px;
      right: 24px;
      font-family: monospace;
    }
    .process-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }
    .p-tag {
      font-size: 12px;
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
      color: var(--text-muted);
      border: 1px solid var(--border-light);
    }

    /* 6. 应用场景 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: all 0.3s;
    }
    .scenario-card:hover {
      border-color: var(--primary-cyan);
      transform: translateY(-4px);
    }
    .scenario-icon {
      font-size: 32px;
      color: var(--primary-cyan);
      margin-bottom: 16px;
    }

    /* 7. 硬核数据监控条 */
    .metrics-bar {
      background: linear-gradient(90deg, #09132B, #0F2044, #09132B);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-lg);
      padding: 40px 20px;
      box-shadow: 0 0 40px rgba(0, 229, 255, 0.15);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-value {
      font-size: 42px;
      font-weight: 900;
      color: var(--primary-cyan);
      font-family: monospace;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 8. 案例对比 */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .case-box {
      display: flex;
      flex-direction: column;
      background: var(--bg-card);
      border: 1px solid var(--border-cyan);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .case-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .case-content {
      padding: 28px;
    }
    .case-stats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      background: rgba(6, 11, 24, 0.6);
      padding: 16px;
      border-radius: var(--radius-sm);
      margin-top: 18px;
      border: 1px solid var(--border-light);
    }
    .stat-item-h {
      font-size: 12px;
      color: var(--text-sub);
    }
    .stat-item-v {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-green);
    }

    /* 9. 口碑评价墙 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .quote-icon {
      color: rgba(0, 229, 255, 0.3);
      font-size: 28px;
      margin-bottom: 12px;
    }
    .author-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
      padding-top: 16px;
      border-top: 1px solid var(--border-light);
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 1px solid var(--primary-cyan);
    }

    /* 10. 资讯动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 12px;
      color: var(--primary-cyan);
      margin-bottom: 8px;
    }

    /* 11. FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .faq-item.active {
      border-color: var(--primary-cyan);
      border-left: 4px solid var(--primary-cyan);
    }
    .faq-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 16px;
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      padding-bottom: 20px;
    }

    /* 12. 转化行动号召 */
    #contact {
      background: radial-gradient(circle at center, rgba(0, 229, 255, 0.15) 0%, var(--bg-main) 70%);
      padding: 100px 0;
      border-top: 1px solid var(--border-cyan);
    }
    .cta-card {
      background: rgba(15, 27, 56, 0.9);
      border: 1px solid var(--primary-cyan);
      box-shadow: 0 0 50px rgba(0, 229, 255, 0.2);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      max-width: 900px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 30px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .form-group label {
      font-size: 14px;
      color: var(--text-muted);
    }
    .form-input, .form-select {
      background: rgba(6, 11, 24, 0.8);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #fff;
      outline: none;
      font-size: 14px;
      transition: border 0.3s;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
    }

    /* 页脚 */
    footer.main-footer {
      background: #03050B;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-sub);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr repeat(3, 1fr);
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: var(--primary-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .overview-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .feature-grid-6, .products-grid, .process-flow, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenarios-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .menu-toggle { display: block; }
      .nav-menu {
        position: fixed;
        top: 76px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 76px);
        background: var(--bg-darker);
        flex-direction: column;
        padding: 40px 24px;
        gap: 20px;
        transition: left 0.3s ease;
        border-top: 1px solid var(--border-cyan);
      }
      .nav-menu.open {
        left: 0;
      }
      .nav-cta-btn { display: none; }
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .feature-grid-6, .products-grid, .process-flow, .testimonials-grid, .news-grid, .scenarios-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .form-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }