/* roulang page: index */
:root {
      --primary: #1A1635;
      --accent: #00E599;
      --secondary: #5D3EBC;
      --bg-light: #F7F8FA;
      --bg-dark: #0D0B18;
      --text-main: #111827;
      --text-muted: #4B5563;
      --border-color: #E5E7EB;
      --card-radius: 14px;
      --shadow-sm: 0 4px 20px -2px rgba(26, 22, 53, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(0, 229, 153, 0.18);
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

    /* 容器体系 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部复合导航条 */
    .top-bar {
      background: var(--bg-dark);
      color: #9CA3AF;
      font-size: 13px;
      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;
    }
    .node-status {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    header.main-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-logo .logo-mark {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--secondary), var(--primary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-weight: 900;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.2s ease;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--secondary);
    }
    .header-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
      text-align: center;
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-primary {
      background: var(--accent);
      color: var(--primary);
    }
    .btn-primary:hover {
      background: #00ca86;
      box-shadow: 0 4px 14px rgba(0, 229, 153, 0.35);
    }
    .btn-dark {
      background: var(--primary);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: var(--secondary);
    }
    .btn-outline {
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    /* 移动端汉堡菜单 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--primary);
    }

    /* 板块排版公用 */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(93, 62, 188, 0.08);
      color: var(--secondary);
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
    }

    /* Section 1: Hero（采用直播预告与全景看板变体） */
    .hero-section {
      padding: 72px 0 100px 0;
      background: radial-gradient(circle at 80% 20%, rgba(93, 62, 188, 0.25) 0%, rgba(26, 22, 53, 0.95) 70%), url('/assets/images/bbf7060fa0875722.png') center/cover no-repeat;
      color: #FFFFFF;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }
    .hero-h1 span {
      color: var(--accent);
    }
    .hero-lead {
      color: #D1D5DB;
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
    }
    .live-preview-card {
      background: rgba(13, 11, 24, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--card-radius);
      padding: 24px;
      backdrop-filter: blur(16px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .live-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: rgba(0, 229, 153, 0.15);
      border: 1px solid var(--accent);
      color: var(--accent);
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 14px;
    }
    .live-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
    }
    .countdown-box {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin: 18px 0;
      text-align: center;
    }
    .countdown-item {
      background: rgba(255, 255, 255, 0.06);
      padding: 12px 6px;
      border-radius: 8px;
    }
    .countdown-number {
      font-size: 24px;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1;
      font-feature-settings: "tnum";
    }
    .countdown-label {
      font-size: 11px;
      color: #9CA3AF;
      margin-top: 6px;
    }

    /* Section 2: 客户案例与业务落地 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 229, 153, 0.4);
    }
    .case-card-img-wrap {
      height: 190px;
      overflow: hidden;
    }
    .case-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-card-img-wrap img {
      transform: scale(1.04);
    }
    .case-card-body {
      padding: 24px;
    }
    .case-tag {
      font-size: 12px;
      color: var(--secondary);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 3: 指标看板区 */
    .metrics-section {
      background: var(--bg-dark);
      color: #FFFFFF;
    }
    .metrics-section .section-title {
      color: #FFFFFF;
    }
    .metrics-section .section-desc {
      color: #9CA3AF;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--card-radius);
      padding: 28px 20px;
      text-align: center;
      transition: transform 0.3s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
    }
    .metric-val {
      font-size: 38px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-title {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 8px;
      color: #F3F4F6;
    }
    .metric-sub {
      font-size: 13px;
      color: #9CA3AF;
      line-height: 1.6;
    }

    /* Section 4: 结果对比区（效能对比表格） */
    .compare-table-wrap {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F9FAFB;
      color: var(--primary);
      font-weight: 700;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-cell {
      background: rgba(0, 229, 153, 0.06);
      font-weight: 700;
      color: var(--primary);
    }

    /* Section 5: 热门产品与服务矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 32px 24px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: all 0.3s ease;
    }
    .product-card.featured {
      border: 2px solid var(--accent);
      box-shadow: 0 10px 30px rgba(0, 229, 153, 0.15);
    }
    .featured-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent);
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 20px;
    }
    .product-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .product-summary {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .product-features {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
    }
    .product-features li {
      font-size: 13px;
      color: var(--text-main);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-features li::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }

    /* Section 6: 架构深度理念区（深色拓扑） */
    .arch-section {
      background: radial-gradient(circle at 20% 50%, rgba(93, 62, 188, 0.3) 0%, rgba(13, 11, 24, 1) 75%);
      color: #FFFFFF;
    }
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-content h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 20px;
      color: #FFFFFF;
      line-height: 1.35;
    }
    .arch-list {
      list-style: none;
      margin-top: 24px;
    }
    .arch-list-item {
      margin-bottom: 20px;
      display: flex;
      gap: 16px;
    }
    .arch-icon-box {
      width: 40px;
      height: 40px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      flex-shrink: 0;
      font-size: 16px;
      font-weight: 800;
    }

    /* Section 7: 核心优势六卡片网格 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 229, 153, 0.4);
    }
    .adv-badge {
      display: inline-block;
      font-size: 11px;
      padding: 2px 8px;
      background: #EEF2F6;
      border-radius: 4px;
      color: var(--secondary);
      font-weight: 600;
      margin-bottom: 14px;
    }
    .adv-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .adv-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 8: 发展历程与里程碑 */
    .timeline-container {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }
    .timeline-container::after {
      content: '';
      position: absolute;
      width: 2px;
      background: var(--border-color);
      top: 0;
      bottom: 0;
      left: 50%;
      margin-left: -1px;
    }
    .timeline-block {
      padding: 10px 40px;
      position: relative;
      width: 50%;
    }
    .timeline-block.left {
      left: 0;
      text-align: right;
    }
    .timeline-block.right {
      left: 50%;
      text-align: left;
    }
    .timeline-dot {
      position: absolute;
      width: 14px;
      height: 14px;
      background: var(--accent);
      border: 3px solid var(--primary);
      border-radius: 50%;
      top: 22px;
      z-index: 1;
    }
    .timeline-block.left .timeline-dot {
      right: -10px;
    }
    .timeline-block.right .timeline-dot {
      left: -10px;
    }
    .timeline-content {
      padding: 20px;
      background: #FFFFFF;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .timeline-year {
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 6px;
    }

    /* Section 9: 资讯与技术前沿 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
    }
    .news-date {
      font-size: 12px;
      color: #9CA3AF;
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .news-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 10: 平台合规与安全保障 */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .security-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      text-align: center;
    }
    .security-badge {
      width: 48px;
      height: 48px;
      margin: 0 auto 16px auto;
      background: rgba(93, 62, 188, 0.08);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary);
      font-size: 20px;
      font-weight: bold;
    }
    .security-card h4 {
      font-size: 16px;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .security-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 11: 用户评价与信任背书 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .testimonial-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
      font-style: italic;
    }
    .client-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .client-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      border: 1px solid var(--border-color);
    }
    .client-meta h5 {
      font-size: 15px;
      color: var(--primary);
    }
    .client-meta span {
      font-size: 12px;
      color: #9CA3AF;
    }

    /* Section 12: 快速解答与常见问题 FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 16px;
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-header {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header::after {
      content: "+";
      font-size: 20px;
      color: var(--secondary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-header::after {
      transform: rotate(45deg);
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #FAFAFA;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
      padding: 0 24px;
    }
    .faq-item.active .faq-body {
      max-height: 300px;
      padding: 16px 24px 24px 24px;
      border-top: 1px solid var(--border-color);
    }

    /* Section 13: 方案对接与即时需求申报 (CTA) */
    .cta-section {
      background: radial-gradient(circle at 50% 50%, rgba(93, 62, 188, 0.35) 0%, rgba(26, 22, 53, 0.98) 80%), url('/assets/images/601d46dd705c1d42.png') center/cover;
      color: #FFFFFF;
      padding: 96px 0;
    }
    .cta-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .cta-form {
      background: #FFFFFF;
      border-radius: var(--card-radius);
      padding: 36px;
      color: var(--text-main);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--secondary);
    }

    /* 页脚 Footer */
    footer.main-footer {
      background: #0D0B18;
      color: #9CA3AF;
      padding: 72px 0 32px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      text-align: center;
      font-size: 13px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .cta-box, .arch-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .security-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-grid, .product-grid, .advantage-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .case-grid, .product-grid, .advantage-grid, .news-grid, .testimonial-grid, .metrics-grid, .security-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .timeline-container::after {
        left: 20px;
      }
      .timeline-block {
        width: 100%;
        padding-left: 50px;
        padding-right: 10px;
      }
      .timeline-block.left, .timeline-block.right {
        left: 0;
        text-align: left;
      }
      .timeline-block.left .timeline-dot, .timeline-block.right .timeline-dot {
        left: 13px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }