/* roulang page: index */
:root {
      --bg-primary: #060b18;
      --bg-secondary: #0b1528;
      --bg-card: rgba(15, 23, 42, 0.72);
      --border-card: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 210, 255, 0.35);
      --primary-blue: #0066ff;
      --primary-cyan: #00d2ff;
      --accent-green: #00f5d4;
      --accent-purple: #7928ca;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-sub: #cbd5e1;
      --glow-blue: 0 0 25px rgba(0, 210, 255, 0.35);
      --glow-cyan: 0 0 20px rgba(0, 245, 212, 0.4);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-primary);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background: radial-gradient(circle at 50% 0%, #102144 0%, var(--bg-primary) 70%);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航系统 */
    .top-bar {
      background: rgba(6, 11, 24, 0.9);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 11, 24, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-card);
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-badge {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--glow-blue);
    }

    .logo-badge svg {
      width: 22px;
      height: 22px;
      fill: #ffffff;
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, #ffffff, var(--primary-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      font-size: 15px;
      color: var(--text-sub);
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary-cyan);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: var(--transition-base);
    }

    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    .header-action .btn-glow {
      padding: 10px 22px;
      font-size: 14px;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition-base);
      border: 1px solid transparent;
    }

    .btn-glow {
      background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
      color: #ffffff;
      box-shadow: var(--glow-blue);
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.6);
      color: #ffffff;
    }

    .btn-outline {
      background: rgba(15, 23, 42, 0.6);
      border-color: rgba(0, 210, 255, 0.4);
      color: var(--primary-cyan);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      background: rgba(0, 210, 255, 0.1);
      border-color: var(--primary-cyan);
      transform: translateY(-2px);
    }

    /* 章节通用结构 */
    .section-spacing {
      padding: 90px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      position: relative;
    }

    .section-spacing.bg-alt {
      background: linear-gradient(180deg, rgba(11, 21, 40, 0.5) 0%, rgba(6, 11, 24, 0.8) 100%);
    }

    .section-head {
      margin-bottom: 50px;
    }

    .section-head.center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .badge-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      border-radius: 20px;
      color: var(--primary-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 14px;
      color: var(--text-main);
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition-base);
    }

    .glass-card:hover {
      border-color: var(--border-active);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
      transform: translateY(-4px);
    }

    /* 1. Hero 板块 */
    .hero-section {
      padding: 70px 0 90px;
      background: url('/assets/images/20b8d7064fc4dcba.jpg') center/cover no-repeat;
      position: relative;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(6, 11, 24, 0.85) 0%, rgba(6, 11, 24, 0.96) 100%);
    }

    .hero-container {
      position: relative;
      z-index: 2;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(90deg, #ffffff 30%, var(--primary-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-summary {
      font-size: 16px;
      color: var(--text-sub);
      line-height: 1.75;
      margin-bottom: 30px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-actions .btn {
      padding: 14px 28px;
      font-size: 15px;
    }

    .hero-tech-capsules {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .tech-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: var(--text-muted);
    }

    .tech-pill span {
      color: var(--accent-green);
      font-weight: 600;
    }

    .hero-monitor-card {
      background: rgba(11, 21, 40, 0.8);
      border: 1px solid var(--border-active);
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--glow-blue);
    }

    .monitor-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      border-bottom: 1px solid var(--border-card);
      padding-bottom: 12px;
    }

    .monitor-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-cyan);
    }

    .monitor-screen-img {
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
      margin-bottom: 16px;
    }

    .monitor-params-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }

    .param-box {
      background: rgba(6, 11, 24, 0.7);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .param-label {
      font-size: 12px;
      color: var(--text-muted);
    }

    .param-val {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent-green);
      font-family: monospace;
    }

    /* 2. 技术规范认证条 */
    .tech-bar {
      padding: 24px 0;
      background: rgba(11, 21, 40, 0.95);
      border-bottom: 1px solid var(--border-card);
    }

    .bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      align-items: center;
    }

    .bar-item {
      display: flex;
      align-items: center;
      gap: 12px;
      border-right: 1px solid rgba(255, 255, 255, 0.06);
      padding-right: 10px;
    }

    .bar-item:last-child {
      border-right: none;
    }

    .bar-icon {
      width: 36px;
      height: 36px;
      background: rgba(0, 210, 255, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-size: 14px;
      flex-shrink: 0;
    }

    .bar-text h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .bar-text p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 3. 产品架构与微服务 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .arch-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-active);
    }

    .arch-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .arch-item {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      padding: 18px;
      border-radius: var(--radius-md);
    }

    .arch-num {
      width: 32px;
      height: 32px;
      background: rgba(0, 102, 255, 0.2);
      border: 1px solid var(--primary-blue);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
    }

    .arch-info h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .arch-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 核心功能 6卡片 */
    .grid-3col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feat-card {
      position: relative;
      overflow: hidden;
    }

    .feat-icon-box {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 210, 255, 0.1));
      border: 1px solid rgba(0, 210, 255, 0.3);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--primary-cyan);
    }

    .feat-icon-box svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .feat-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .feat-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 5. 软硬件集成 3大卡片 */
    .module-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .mod-tag {
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-green);
      background: rgba(0, 245, 212, 0.1);
      border: 1px solid rgba(0, 245, 212, 0.3);
      padding: 2px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 12px;
    }

    .module-img {
      border-radius: var(--radius-sm);
      margin: 14px 0;
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .proto-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .proto-pill {
      font-size: 11px;
      padding: 2px 6px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 3px;
      color: var(--text-sub);
    }

    /* 6. 数字孪生控制台透视 */
    .dashboard-preview-box {
      background: rgba(11, 21, 40, 0.85);
      border: 1px solid var(--border-active);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 0 50px rgba(0, 102, 255, 0.2);
    }

    .preview-header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }

    .preview-dots {
      display: flex;
      gap: 6px;
    }

    .dot-circle {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
    }

    .dot-circle.red { background: #ff5f56; }
    .dot-circle.yellow { background: #ffbd2e; }
    .dot-circle.green { background: #27c93f; }

    .preview-img-frame {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* 7. 细分应用场景 4列 */
    .grid-4col {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-card {
      padding: 22px;
    }

    .scenario-card h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--primary-cyan);
    }

    .scenario-target {
      font-size: 12px;
      color: var(--accent-green);
      margin-bottom: 12px;
      display: block;
    }

    .scenario-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 8. 案例库 2列 */
    .grid-2col {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .case-card {
      padding: 0;
      overflow: hidden;
    }

    .case-thumb {
      height: 200px;
      overflow: hidden;
    }

    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .case-card:hover .case-thumb img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 24px;
    }

    .case-metrics-bar {
      display: flex;
      gap: 20px;
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .case-metric-item h5 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-cyan);
      font-family: monospace;
    }

    .case-metric-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 9. 关键运营数据指标条 */
    .counter-bar {
      background: linear-gradient(90deg, #091428 0%, #0d1e3d 50%, #091428 100%);
      border-top: 1px solid var(--border-active);
      border-bottom: 1px solid var(--border-active);
      padding: 50px 0;
    }

    .counter-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }

    .counter-val {
      font-size: 40px;
      font-weight: 800;
      color: var(--primary-cyan);
      font-family: monospace;
      margin-bottom: 6px;
      text-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
    }

    .counter-label {
      font-size: 14px;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 10. 用户口碑评价墙 */
    .review-user-box {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    .review-user-name {
      font-size: 15px;
      font-weight: 600;
    }

    .review-user-title {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-comment {
      font-size: 13.5px;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 11. 资讯动态摘要 */
    .news-card {
      padding: 22px;
    }

    .news-date {
      font-size: 12px;
      color: var(--primary-cyan);
      margin-bottom: 8px;
    }

    .news-card h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 12. 常见问题 FAQ */
    .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-card);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-question:hover {
      color: var(--primary-cyan);
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 13. 底部收口转化行动区 */
    .cta-container-box {
      background: linear-gradient(135deg, rgba(16, 33, 68, 0.9) 0%, rgba(6, 11, 24, 0.95) 100%);
      border: 1px solid var(--border-active);
      border-radius: var(--radius-lg);
      padding: 50px;
      box-shadow: 0 0 40px rgba(0, 102, 255, 0.25);
    }

    .cta-inner-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .form-input {
      width: 100%;
      padding: 12px 16px;
      background: rgba(6, 11, 24, 0.8);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-sm);
      color: #ffffff;
      font-size: 14px;
      outline: none;
      transition: var(--transition-base);
    }

    .form-input:focus {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
    }

    /* 页脚 */
    .site-footer {
      background: #040710;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 18px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--primary-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 移动端汉堡包触发器 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .cta-inner-grid {
        grid-template-columns: 1fr;
      }
      .grid-3col {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4col {
        grid-template-columns: repeat(2, 1fr);
      }
      .bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .bar-item:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-list {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(6, 11, 24, 0.98);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-card);
        gap: 16px;
      }
      .nav-list.open {
        display: flex;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .grid-3col, .grid-2col, .grid-4col, .counter-grid, .bar-grid {
        grid-template-columns: 1fr;
      }
      .bar-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        padding-bottom: 10px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }