/* roulang page: index */
:root {
      --bg-dark: #060B19;
      --bg-dark-sub: #0A1329;
      --bg-card: rgba(15, 23, 42, 0.68);
      --primary-glow: #1E6BFF;
      --accent-glow: #00D2BA;
      --text-pure: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --border-line: rgba(255, 255, 255, 0.09);
      --border-focus: rgba(30, 107, 255, 0.45);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-glow: 0 0 25px rgba(30, 107, 255, 0.35);
      --shadow-card: 0 16px 36px rgba(0, 0, 0, 0.45);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      --max-width: 1240px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-pure);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

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

    /* 顶部双行导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(6, 11, 25, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
    }

    .nav-top-bar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: var(--text-dim);
      padding: 6px 0;
    }

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

    .nav-top-left span, .nav-top-right span {
      margin-right: 20px;
    }

    .nav-main {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.2px;
      color: var(--text-pure);
    }

    .brand-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary-glow), var(--accent-glow));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 14px rgba(0, 210, 186, 0.4);
    }

    .brand-icon svg {
      width: 20px;
      height: 20px;
      fill: #fff;
    }

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

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

    .nav-link:hover, .nav-link.active {
      color: var(--text-pure);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-glow);
      border-radius: 2px;
    }

    .nav-cta-btn {
      padding: 8px 22px;
      background: linear-gradient(135deg, var(--primary-glow), var(--accent-glow));
      border-radius: var(--radius-sm);
      color: #fff;
      font-weight: 600;
      font-size: 14px;
      box-shadow: 0 0 16px rgba(30, 107, 255, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(0, 210, 186, 0.55);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--text-pure);
      font-size: 24px;
      cursor: pointer;
    }

    /* 通用组件 */
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-dark-sub);
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(30, 107, 255, 0.12);
      border: 1px solid rgba(30, 107, 255, 0.35);
      border-radius: 20px;
      color: var(--accent-glow);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 34px;
      line-height: 1.35;
      font-weight: 700;
      color: var(--text-pure);
      margin-bottom: 16px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 780px;
      line-height: 1.8;
      margin-bottom: 48px;
    }

    .text-center {
      text-align: center;
    }

    .text-center .section-subtitle {
      margin-left: auto;
      margin-right: auto;
    }

    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .glass-card:hover {
      border-color: rgba(30, 107, 255, 0.35);
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    }

    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 13px 32px;
      background: linear-gradient(135deg, var(--primary-glow), var(--accent-glow));
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: var(--shadow-glow);
      cursor: pointer;
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 210, 186, 0.6);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 13px 30px;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-pure);
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-line);
      backdrop-filter: blur(8px);
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.25);
    }

    /* 板块 1: Hero 首屏 */
    .hero-section {
      padding-top: 170px;
      padding-bottom: 90px;
      background: radial-gradient(circle at 50% 20%, rgba(30, 107, 255, 0.18) 0%, transparent 60%), url('/assets/images/55b5d3b0b6f7de6e.webp') center/cover no-repeat;
      position: relative;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(6, 11, 25, 0.82) 0%, rgba(6, 11, 25, 0.95) 100%);
      pointer-events: none;
    }

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

    .hero-h1 {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      background: linear-gradient(120deg, #FFFFFF 30%, #BAE6FD 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.85;
      max-width: 860px;
      margin-bottom: 36px;
    }

    .hero-check-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 40px;
    }

    .check-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: #E2E8F0;
    }

    .check-item-icon {
      color: var(--accent-glow);
      font-weight: bold;
    }

    .hero-actions {
      display: flex;
      gap: 18px;
      margin-bottom: 50px;
    }

    .hero-stat-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .hero-stat-box {
      background: rgba(15, 23, 42, 0.7);
      border: 1px solid var(--border-line);
      padding: 20px;
      border-radius: var(--radius-sm);
      text-align: left;
    }

    .hero-stat-val {
      font-size: 28px;
      font-weight: 700;
      color: var(--accent-glow);
      font-family: monospace;
    }

    .hero-stat-label {
      font-size: 13px;
      color: var(--text-dim);
      margin-top: 4px;
    }

    /* 板块 2: 底座介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-card-banner {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .about-card-banner img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .spec-badge-group {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: rgba(255, 255, 255, 0.03);
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .spec-item-num {
      background: var(--primary-glow);
      color: #fff;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 板块 3: 核心优势网格 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .advantage-card h3 {
      font-size: 20px;
      margin-bottom: 12px;
      color: var(--text-pure);
    }

    .advantage-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .advantage-tag {
      font-size: 12px;
      color: var(--accent-glow);
      margin-bottom: 12px;
      display: block;
      font-weight: 600;
    }

    /* 板块 4: 产品与矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .product-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .product-thumb {
      height: 180px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 20px;
    }

    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .product-title {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .product-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .product-specs-list {
      border-top: 1px solid var(--border-line);
      padding-top: 14px;
      margin-bottom: 20px;
    }

    .product-specs-list li {
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }

    .product-specs-list li span:last-child {
      color: #E2E8F0;
    }

    /* 板块 5: 技术全景与功能分组 */
    .layer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }

    .layer-card {
      display: flex;
      gap: 30px;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 28px;
    }

    .layer-tag-side {
      min-width: 160px;
      border-right: 1px solid var(--border-line);
      padding-right: 20px;
    }

    .layer-tag-side h4 {
      font-size: 18px;
      color: var(--accent-glow);
      margin-bottom: 6px;
    }

    .layer-tag-side p {
      font-size: 12px;
      color: var(--text-dim);
    }

    .layer-body-content {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .layer-pill {
      background: rgba(255, 255, 255, 0.04);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 13px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: #E2E8F0;
    }

    /* 板块 6: 场景矩阵 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .scenario-card {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .scenario-img {
      width: 140px;
      height: 140px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      flex-shrink: 0;
    }

    .scenario-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .scenario-info h3 {
      font-size: 18px;
      margin-bottom: 8px;
      color: var(--text-pure);
    }

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

    /* 板块 7: 大屏演示 */
    .demo-screen-box {
      border: 1px solid var(--border-line);
      border-radius: var(--radius-lg);
      overflow: hidden;
      position: relative;
      background: #040813;
      box-shadow: 0 0 50px rgba(30, 107, 255, 0.2);
    }

    .demo-screen-img {
      width: 100%;
      max-height: 520px;
      object-fit: cover;
      opacity: 0.85;
    }

    .demo-screen-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(180deg, transparent 0%, rgba(6, 11, 25, 0.95) 80%);
      padding: 30px;
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
    }

    /* 板块 8: 标杆案例区 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      border-top: 3px solid var(--primary-glow);
    }

    .case-num-badge {
      font-size: 26px;
      font-weight: 700;
      color: var(--accent-glow);
      font-family: monospace;
      margin-bottom: 6px;
    }

    .case-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .case-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 9: 故事与成效 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .story-card {
      border-left: 3px solid var(--accent-glow);
    }

    .story-role {
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 8px;
    }

    .story-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      font-style: italic;
    }

    /* 板块 10: 运行数据条 */
    .metrics-bar-section {
      background: linear-gradient(90deg, #0A1329 0%, #102146 50%, #0A1329 100%);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
      padding: 50px 0;
    }

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

    .metric-value {
      font-size: 42px;
      font-weight: 800;
      color: var(--accent-glow);
      font-family: monospace;
      letter-spacing: -1px;
    }

    .metric-text {
      font-size: 14px;
      color: #CBD5E1;
      margin-top: 6px;
    }

    /* 板块 11: 客户口碑墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
    }

    .avatar-placeholder {
      width: 40px;
      height: 40px;
      background: var(--primary-glow);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 14px;
    }

    /* 板块 12: 资讯深度 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card-date {
      font-size: 12px;
      color: var(--text-dim);
      margin-bottom: 8px;
    }

    .news-card-title {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text-pure);
    }

    .news-card-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 13: FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      padding: 20px 24px;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 17px;
      font-weight: 600;
      color: var(--text-pure);
    }

    .faq-answer {
      margin-top: 12px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      padding-top: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 板块 14: 底部开通转化 CTA */
    .cta-banner {
      background: radial-gradient(circle at 50% 50%, rgba(30, 107, 255, 0.28) 0%, rgba(10, 19, 41, 0.95) 100%);
      border: 1px solid rgba(30, 107, 255, 0.35);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      box-shadow: 0 0 40px rgba(30, 107, 255, 0.2);
    }

    .cta-form {
      display: flex;
      max-width: 520px;
      margin: 30px auto 0;
      gap: 10px;
    }

    .cta-input {
      flex: 1;
      padding: 13px 18px;
      border-radius: var(--radius-sm);
      background: rgba(6, 11, 25, 0.7);
      border: 1px solid var(--border-line);
      color: #fff;
      font-size: 14px;
      outline: none;
    }

    .cta-input:focus {
      border-color: var(--accent-glow);
    }

    /* 页脚系统 */
    .site-footer {
      background: #03060E;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      color: var(--text-pure);
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .footer-col p {
      line-height: 1.8;
      font-size: 13px;
      margin-bottom: 12px;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: var(--accent-glow);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-dim);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-stat-row, .advantages-grid, .product-grid, .cases-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-inner {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-top-bar {
        display: none;
      }
      .nav-links, .nav-cta-btn {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #060B19;
        padding: 24px;
        border-bottom: 1px solid var(--border-line);
        gap: 16px;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .about-grid, .scenarios-grid, .stories-grid, .hero-stat-row, .advantages-grid, .product-grid, .cases-grid, .testimonial-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-inner {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .hero-actions {
        flex-direction: column;
      }
      .layer-card {
        flex-direction: column;
        align-items: flex-start;
      }
      .layer-tag-side {
        border-right: none;
        border-bottom: 1px solid var(--border-line);
        padding-bottom: 12px;
        width: 100%;
      }
    }