/* roulang page: index */
:root {
      --bg-dark: #07090e;
      --bg-dark-card: #0e121b;
      --bg-dark-subtle: #141923;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --text-light: #f1f5f9;
      --text-light-muted: #94a3b8;
      --primary: #0f4c81;
      --accent: #00a3bf;
      --accent-glow: rgba(0, 163, 191, 0.15);
      --border-dark: #1e293b;
      --border-light: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --shadow-md: 0 4px 20px -2px rgba(0,0,0,0.08);
      --shadow-lg: 0 12px 32px -4px rgba(0,0,0,0.12);
      --shadow-glow: 0 0 25px rgba(0, 163, 191, 0.2);
      --container-max: 1240px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      color: var(--text-main);
      background-color: var(--bg-light);
    }

    body {
      line-height: 1.75;
      font-size: 15px;
      overflow-x: hidden;
    }

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

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

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

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 9, 14, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
      transition: var(--transition);
    }

    .header-topbar {
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 6px 0;
      font-size: 12px;
      color: var(--text-light-muted);
    }

    .header-topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .topbar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      background: rgba(0, 163, 191, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
    }

    .topbar-links {
      display: flex;
      gap: 18px;
      align-items: center;
    }

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

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-light);
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 16px;
      box-shadow: var(--shadow-glow);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-item a {
      color: var(--text-light-muted);
      font-size: 14px;
      font-weight: 500;
      position: relative;
      padding: 4px 0;
    }

    .nav-item a:hover,
    .nav-item a.active {
      color: #ffffff;
    }

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

    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #00b4d8, #0f4c81);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 180, 216, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 180, 216, 0.45);
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.2);
      color: var(--text-light);
    }

    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(0, 163, 191, 0.05);
    }

    .btn-outline-dark {
      background: transparent;
      border-color: var(--border-light);
      color: var(--text-main);
    }

    .btn-outline-dark:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f1f5f9;
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-light);
      font-size: 22px;
      cursor: pointer;
    }

    /* 板块通用基础 */
    .section {
      padding: 90px 0;
      position: relative;
    }

    .section-sm {
      padding: 60px 0;
    }

    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }

    .section-subtle-dark {
      background-color: var(--bg-dark-card);
      color: var(--text-light);
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .section-light {
      background-color: var(--bg-light);
      color: var(--text-main);
    }

    .section-white {
      background-color: var(--bg-white);
      color: var(--text-main);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 54px auto;
    }

    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.02em;
    }

    .badge-cyan {
      background: rgba(0, 163, 191, 0.12);
      color: var(--accent);
      border: 1px solid rgba(0, 163, 191, 0.25);
    }

    .badge-blue {
      background: rgba(15, 76, 129, 0.1);
      color: var(--primary);
      border: 1px solid rgba(15, 76, 129, 0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }

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

    .section-dark .section-desc {
      color: var(--text-light-muted);
    }

    /* 1. Hero 板块：深色信息面板 + 榜单 */
    .hero-section {
      background-color: var(--bg-dark);
      background-image: radial-gradient(circle at 80% 20%, rgba(0, 163, 191, 0.12) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(15, 76, 129, 0.2) 0%, transparent 60%);
      color: var(--text-light);
      padding: 90px 0 100px 0;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-dark);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 30px;
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #ffffff 40%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 16px;
      color: var(--text-light-muted);
      line-height: 1.8;
      margin-bottom: 36px;
    }

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

    .hero-features-list {
      display: flex;
      gap: 24px;
      list-style: none;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
    }

    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-light-muted);
    }

    .hero-feature-item i {
      color: var(--accent);
    }

    .hero-panel {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-lg), var(--shadow-glow);
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding-bottom: 14px;
    }

    .panel-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-light);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .panel-status {
      font-size: 12px;
      color: #10b981;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .panel-status::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
    }

    .benchmark-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .benchmark-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .bm-name {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-light);
    }

    .bm-spec {
      font-size: 12px;
      color: var(--text-light-muted);
    }

    .bm-val {
      text-align: right;
    }

    .bm-num {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent);
      font-family: monospace;
    }

    .bm-status {
      font-size: 11px;
      color: #10b981;
    }

    /* 2. 已上线能力板块 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }

    .feature-icon-wrapper {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 163, 191, 0.08);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
    }

    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-chip {
      font-size: 12px;
      padding: 3px 10px;
      background: #f1f5f9;
      color: #475569;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 3. 产品技术底座 */
    .dual-showcase {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .showcase-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-light);
    }

    .showcase-content h3 {
      font-size: 26px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 18px;
    }

    .spec-table {
      margin-top: 24px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    .spec-row {
      display: grid;
      grid-template-columns: 140px 1fr;
      padding: 12px 18px;
      font-size: 13px;
      border-bottom: 1px solid var(--border-light);
    }

    .spec-row:last-child {
      border-bottom: none;
    }

    .spec-row:nth-child(even) {
      background: #f8fafc;
    }

    .spec-label {
      font-weight: 600;
      color: var(--text-main);
    }

    .spec-value {
      color: var(--text-muted);
    }

    /* 4. 进行中功能与 MLOps 工具链 */
    .progress-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .progress-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      overflow: hidden;
    }

    .progress-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent);
    }

    .progress-status {
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .progress-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-light);
    }

    .progress-desc {
      font-size: 13px;
      color: var(--text-light-muted);
      line-height: 1.6;
    }

    /* 5. 规划中技术路线 */
    .roadmap-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .roadmap-card {
      background: #ffffff;
      border: 1px dashed #cbd5e1;
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .roadmap-badge {
      display: inline-block;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 4px;
      background: #e2e8f0;
      color: #475569;
      margin-bottom: 12px;
      font-weight: 600;
    }

    /* 6. 四层架构深色反色区 */
    .arch-stack {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .arch-layer {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px 28px;
      display: grid;
      grid-template-columns: 180px 1fr;
      align-items: center;
      gap: 24px;
    }

    .layer-name {
      font-size: 16px;
      font-weight: 700;
      color: var(--accent);
      border-right: 1px solid rgba(255, 255, 255, 0.1);
      padding-right: 12px;
    }

    .layer-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .layer-chip {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-light-muted);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
    }

    /* 7. 行业场景落地案例 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scenario-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .scenario-img-wrapper {
      height: 180px;
      overflow: hidden;
    }

    .scenario-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .scenario-card:hover .scenario-img-wrapper img {
      transform: scale(1.05);
    }

    .scenario-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .scenario-industry {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 8px;
    }

    .scenario-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .scenario-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .scenario-metric {
      background: #f8fafc;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: #334155;
      border-left: 3px solid var(--accent);
    }

    /* 8. 数据指标统计条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .metric-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
    }

    .metric-number {
      font-size: 38px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 8px;
      font-family: monospace;
    }

    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 6px;
    }

    .metric-sub {
      font-size: 12px;
      color: var(--text-light-muted);
    }

    /* 9. 客户评价网格 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-icon {
      font-size: 24px;
      color: #cbd5e1;
      margin-bottom: 14px;
    }

    .testimonial-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .client-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .client-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #475569;
      font-weight: 700;
      font-size: 14px;
    }

    .client-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* 10. 更新日志与版本追踪 (Table-like) */
    .changelog-table {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .changelog-row {
      display: grid;
      grid-template-columns: 140px 120px 1fr 100px;
      padding: 16px 24px;
      border-bottom: 1px solid var(--border-light);
      align-items: center;
      font-size: 14px;
    }

    .changelog-row:last-child {
      border-bottom: none;
    }

    .changelog-header {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-muted);
      font-size: 13px;
    }

    .ver-badge {
      font-weight: 700;
      color: var(--primary);
    }

    .status-badge-live {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      background: #ecfdf5;
      color: #059669;
      font-weight: 600;
    }

    /* 11. 行业资讯与白皮书 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .insight-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }

    .insight-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
    }

    .insight-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .insight-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .insight-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .insight-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. 价格方案与选型对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .pricing-card.featured {
      border-color: var(--accent);
      box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent);
    }

    .featured-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: 12px;
    }

    .pricing-name {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .pricing-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 38px;
    }

    .pricing-price {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 20px;
    }

    .pricing-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 400;
    }

    .pricing-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
      flex: 1;
    }

    .pricing-features li {
      font-size: 13px;
      color: #334155;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .pricing-features li i {
      color: #10b981;
      font-size: 14px;
    }

    /* 13. FAQ 手风琴 */
    .faq-container {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 15px;
      user-select: none;
    }

    .faq-icon {
      font-size: 14px;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #fafcff;
      border-top: 1px solid transparent;
    }

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 14px;
      color: #475569;
      line-height: 1.75;
    }

    .faq-item.active {
      border-color: #cbd5e1;
    }

    .faq-item.active .faq-question {
      color: var(--primary);
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--accent);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      border-top-color: #f1f5f9;
      transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
    }

    /* 14. 信任合规保障条 */
    .security-strip {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 24px;
    }

    .security-item {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-light-muted);
      font-size: 14px;
      font-weight: 600;
    }

    .security-item i {
      font-size: 22px;
      color: var(--accent);
    }

    /* 15. 底部收口转化表单区 */
    .cta-box {
      background: linear-gradient(135deg, #0e1420 0%, #07090e 100%);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 48px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .cta-box::after {
      content: '';
      position: absolute;
      bottom: -80px;
      right: -80px;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(0,163,191,0.2) 0%, transparent 70%);
      pointer-events: none;
    }

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

    .cta-info h2 {
      font-size: 30px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .cta-info p {
      font-size: 15px;
      color: var(--text-light-muted);
      line-height: 1.7;
    }

    .lead-form {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .form-group input,
    .form-group select {
      width: 100%;
      padding: 12px 16px;
      background: rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
    }

    .form-group select option {
      background: #0e121b;
      color: #fff;
    }

    .form-group input:focus,
    .form-group select:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(0, 163, 191, 0.2);
    }

    /* 统一页脚 */
    .site-footer {
      background-color: #040508;
      border-top: 1px solid #141a24;
      color: var(--text-light-muted);
      padding: 60px 0 30px 0;
      font-size: 13px;
    }

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

    .footer-brand h3 {
      font-size: 18px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid,
      .dual-showcase,
      .cta-inner {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .features-grid,
      .scenarios-grid,
      .testimonial-grid,
      .insights-grid,
      .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .progress-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-topbar {
        display: none;
      }
      .nav-menu {
        position: fixed;
        top: 61px;
        left: 0;
        width: 100%;
        background: #07090e;
        border-bottom: 1px solid var(--border-dark);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        display: none;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .features-grid,
      .scenarios-grid,
      .testimonial-grid,
      .insights-grid,
      .pricing-grid,
      .roadmap-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .progress-timeline {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .arch-layer {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .layer-name {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 8px;
      }
      .changelog-row {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
      }
      .changelog-header {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .metrics-bar {
        grid-template-columns: 1fr;
      }
      .hero-features-list {
        flex-direction: column;
        gap: 12px;
      }
    }