/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-hover: #1442af;
      --accent: #10B981;
      --cyan: #06B6D4;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-focus: #93C5FD;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.1), 0 4px 10px -2px rgba(15, 23, 42, 0.05);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --container-max: 1240px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      padding-bottom: 74px; /* 为浮动转化条留出空间 */
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* TopBar */
    .topbar {
      background: #0b1120;
      color: #94a3b8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-items {
      display: flex;
      gap: 20px;
    }
    .topbar-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* Main Navigation */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-wrap {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .brand-logo i {
      font-size: 24px;
      color: var(--primary);
    }
    .brand-tag {
      font-size: 11px;
      background: #EFF6FF;
      color: var(--primary);
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 600;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-weight: 500;
      color: #334155;
      font-size: 15px;
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .header-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: #fff;
      padding: 10px 22px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 14px;
      box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
    }
    .header-cta-btn:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(26, 86, 219, 0.35);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Section Commom Styles */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px auto;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: #EFF6FF;
      color: var(--primary);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero Plate (蓝图指定：无大图首屏，图标矩阵 + 状态条 + 短标题) */
    .hero-section {
      background: #FFFFFF;
      padding: 60px 0 80px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      top: -20%;
      left: 50%;
      transform: translateX(-50%);
      width: 800px;
      height: 400px;
      background: radial-gradient(circle, rgba(26, 86, 219, 0.08) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }
    .hero-status-strip {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #F1F5F9;
      border: 1px solid #CBD5E1;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      color: #334155;
      margin-bottom: 24px;
    }
    .status-dot-pulse {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }
    .hero-main-title {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      color: #0F172A;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-main-title span {
      color: var(--primary);
    }
    .hero-lead-text {
      font-size: 16px;
      color: #475569;
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-action-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }
    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
    }
    .btn-outline {
      background: #ffffff;
      color: #334155;
      border-color: #CBD5E1;
    }
    .btn-outline:hover {
      background: #F8FAFC;
      border-color: #94A3B8;
      color: var(--primary);
    }
    .hero-icon-matrix {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .matrix-item {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 14px;
      text-align: center;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }
    .matrix-item:hover {
      transform: translateY(-4px);
      background: #FFFFFF;
      border-color: var(--border-focus);
      box-shadow: var(--shadow-md);
    }
    .matrix-icon-wrap {
      width: 44px;
      height: 44px;
      margin: 0 auto 12px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      background: #EFF6FF;
    }
    .matrix-title {
      font-size: 14px;
      font-weight: 700;
      color: #1E293B;
      margin-bottom: 4px;
    }
    .matrix-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Plate 2: 资料目录（按蓝图顺位） */
    .section-catalog {
      background: #FFFFFF;
    }
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .catalog-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .catalog-card:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .catalog-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      display: inline-block;
    }
    .catalog-title {
      font-size: 17px;
      font-weight: 700;
      color: #1E293B;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .catalog-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .catalog-meta {
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-light);
    }
    .catalog-link {
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Plate 3: 架构与技术内核 (嵌入硬核参数) */
    .section-overview {
      background: var(--bg-page);
    }
    .overview-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .overview-visual {
      background: #0F172A;
      border-radius: var(--radius-lg);
      padding: 28px;
      color: #fff;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .visual-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 12px;
    }
    .terminal-dots {
      display: flex;
      gap: 6px;
    }
    .terminal-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #475569;
    }
    .terminal-dots span:nth-child(1) { background: #EF4444; }
    .terminal-dots span:nth-child(2) { background: #F59E0B; }
    .terminal-dots span:nth-child(3) { background: #10B981; }
    .terminal-title {
      font-size: 13px;
      font-family: monospace;
      color: #94A3B8;
    }
    .overview-img-box {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 20px;
      position: relative;
    }
    .overview-img-box img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      filter: saturate(1.15) contrast(1.05);
    }
    .param-pill-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      background: rgba(255, 255, 255, 0.05);
      padding: 14px;
      border-radius: var(--radius-sm);
    }
    .param-pill {
      text-align: center;
    }
    .param-pill .p-num {
      font-size: 18px;
      font-weight: 700;
      color: var(--cyan);
      font-family: 'Inter', sans-serif;
    }
    .param-pill .p-lbl {
      font-size: 11px;
      color: #94A3B8;
      margin-top: 2px;
    }
    .overview-content h3 {
      font-size: 26px;
      font-weight: 700;
      line-height: 1.35;
      color: #0F172A;
      margin-bottom: 16px;
    }
    .overview-content p {
      font-size: 15px;
      color: #475569;
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .feature-check-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr;
      gap: 12px;
      margin-bottom: 28px;
    }
    .feature-check-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: #1E293B;
    }
    .feature-check-list li i {
      color: var(--accent);
      margin-top: 3px;
    }

    /* Plate 4: 核心优势六卡格 (蓝图：价值点) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }
    .feature-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .f-icon-box {
      width: 52px;
      height: 52px;
      background: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      border-radius: 12px;
      margin-bottom: 20px;
      transition: background 0.25s ease, color 0.25s ease;
    }
    .feature-card:hover .f-icon-box {
      background: var(--primary);
      color: #FFFFFF;
    }
    .feature-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .f-stat-tag {
      display: inline-block;
      font-size: 12px;
      background: #F1F5F9;
      color: #0F172A;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* Plate 5: 热门商用套件 (3列纵向高亮卡片) */
    .product-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: center;
    }
    .product-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }
    .product-box.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
      padding: 44px 30px;
      transform: translateY(-6px);
      background: #FFFFFF;
    }
    .featured-ribbon {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }
    .product-box h4 {
      font-size: 20px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 8px;
    }
    .product-box .sub-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 38px;
    }
    .product-specs {
      list-style: none;
      margin-bottom: 28px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .product-specs li {
      font-size: 13.5px;
      color: #334155;
      padding: 7px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .product-specs li i {
      color: var(--accent);
      font-size: 14px;
    }
    .product-specs li.muted {
      color: var(--text-light);
    }
    .product-btn {
      width: 100%;
      text-align: center;
      padding: 12px 0;
    }

    /* Plate 6: 算法内核与运动科学管道 (深色沉浸对比区) */
    .section-tech-dark {
      background: var(--bg-dark);
      color: #FFFFFF;
      position: relative;
      overflow: hidden;
    }
    .section-tech-dark .section-title {
      color: #FFFFFF;
    }
    .section-tech-dark .section-desc {
      color: #94A3B8;
    }
    .tech-pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .pipeline-step {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      position: relative;
      transition: all 0.25s ease;
    }
    .pipeline-step:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--cyan);
      transform: translateY(-4px);
    }
    .step-index {
      font-size: 12px;
      font-weight: 800;
      color: var(--cyan);
      letter-spacing: 1px;
      margin-bottom: 12px;
      display: block;
      font-family: monospace;
    }
    .step-name {
      font-size: 17px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* Plate 7: 典型运动场景演示 (图文多维展示) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .scenario-media {
      height: 220px;
      position: relative;
      overflow: hidden;
    }
    .scenario-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }
    .scenario-card:hover .scenario-media img {
      transform: scale(1.04);
    }
    .scenario-badge-overlay {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(4px);
      color: #fff;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }
    .scenario-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .scenario-body h4 {
      font-size: 18px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 10px;
    }
    .scenario-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .scenario-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }
    .scenario-tags span {
      background: #F1F5F9;
      color: #475569;
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* Plate 8: 关键效能数据统计条 (蓝图：关键图表/数据指标) */
    .section-metrics {
      background: linear-gradient(135deg, #1E40AF 0%, #1A56DB 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .metric-item {
      padding: 20px;
      border-right: 1px solid rgba(255,255,255,0.15);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-val {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.1;
      font-family: 'Inter', sans-serif;
      margin-bottom: 8px;
      color: #FFFFFF;
      display: flex;
      justify-content: center;
      align-items: baseline;
      gap: 2px;
    }
    .metric-val small {
      font-size: 20px;
      font-weight: 600;
      color: var(--cyan);
    }
    .metric-name {
      font-size: 14px;
      color: #E2E8F0;
      font-weight: 500;
    }
    .metric-subtext {
      font-size: 12px;
      color: #93C5FD;
      margin-top: 4px;
    }

    /* Plate 9: 差异对比表 (传统 vs 体育AI助手) */
    .compare-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th {
      background: #F8FAFC;
      padding: 18px 24px;
      font-size: 15px;
      font-weight: 700;
      color: #1E293B;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th.highlight-th {
      background: #EFF6FF;
      color: var(--primary);
    }
    .compare-table td {
      padding: 16px 24px;
      font-size: 14px;
      border-bottom: 1px solid #F1F5F9;
      color: #334155;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.dim {
      color: #64748B;
    }
    .compare-table td.bright {
      font-weight: 600;
      color: #0F172A;
      background: #FBFDFF;
    }
    .compare-table td.bright i {
      color: var(--accent);
      margin-right: 6px;
    }

    /* Plate 10: 客户印证与应用评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .stars {
      color: #F59E0B;
      font-size: 13px;
      margin-bottom: 14px;
    }
    .t-quote {
      font-size: 14.5px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .t-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .t-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: 16px;
    }
    .t-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: #0F172A;
    }
    .t-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Plate 11: 资讯与动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .news-cover {
      height: 160px;
      overflow: hidden;
    }
    .news-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 20px;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 8px;
      line-height: 1.45;
    }
    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .news-read {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }

    /* Plate 12: FAQ 手风琴与安全保障条 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto 50px auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-header {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: #0F172A;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-header:hover {
      background: #F8FAFC;
    }
    .faq-header i {
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.open .faq-header i {
      transform: rotate(180deg);
    }
    .faq-body {
      padding: 0 22px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #FFFFFF;
      border-top: 1px solid transparent;
    }
    .faq-item.open .faq-body {
      padding: 16px 22px 22px 22px;
      max-height: 250px;
      border-top-color: #F1F5F9;
    }
    .faq-body p {
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
    }

    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #F1F5F9;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .g-icon {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #FFFFFF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: var(--shadow-sm);
      flex-shrink: 0;
    }
    .g-text h5 {
      font-size: 14px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 2px;
    }
    .g-text p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Plate 13: 试用中心申请表单 (蓝图强转化区) */
    .trial-box-container {
      max-width: 980px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 4fr 5fr;
    }
    .trial-info-panel {
      background: linear-gradient(145deg, #1A56DB 0%, #0F172A 100%);
      color: #fff;
      padding: 40px 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .trial-info-panel h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .trial-info-panel p {
      font-size: 13.5px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .trial-perks {
      list-style: none;
      margin-bottom: 24px;
    }
    .trial-perks li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 13.5px;
      margin-bottom: 12px;
      color: #F8FAFC;
    }
    .trial-perks li i {
      color: var(--cyan);
    }
    .trial-form-panel {
      padding: 40px 36px;
      background: #FFFFFF;
    }
    .trial-form-panel h4 {
      font-size: 20px;
      font-weight: 700;
      color: #0F172A;
      margin-bottom: 20px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background: #F8FAFC;
      color: #0F172A;
      outline: none;
      transition: border-color 0.2s ease, background 0.2s ease;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }
    .form-submit-btn {
      width: 100%;
      padding: 13px;
      background: var(--primary);
      color: #FFFFFF;
      border: none;
      border-radius: 6px;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
      margin-top: 10px;
      transition: background 0.2s ease;
    }
    .form-submit-btn:hover {
      background: var(--primary-hover);
    }
    .form-privacy-note {
      font-size: 11.5px;
      color: var(--text-light);
      margin-top: 12px;
      text-align: center;
    }

    /* 浮动吸底转化条 (蓝图要求) */
    .fixed-action-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 23, 42, 0.94);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding: 12px 0;
      z-index: 999;
      color: #fff;
    }
    .bar-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .bar-info {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .bar-badge {
      background: var(--accent);
      color: #0F172A;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .bar-text {
      font-size: 14px;
      color: #F1F5F9;
    }
    .bar-btns {
      display: flex;
      gap: 12px;
    }
    .bar-btn-solid {
      background: var(--primary);
      color: #fff;
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 13.5px;
      font-weight: 600;
    }
    .bar-btn-solid:hover {
      background: var(--primary-hover);
    }
    .bar-btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: #fff;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 13.5px;
    }
    .bar-btn-outline:hover {
      background: rgba(255,255,255,0.08);
    }

    /* Footer */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-logo {
      font-size: 22px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .footer-logo i {
      color: var(--primary);
    }
    .footer-about {
      line-height: 1.7;
      font-size: 13px;
      color: #64748B;
      margin-bottom: 16px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 13px;
    }
    .footer-contact i {
      color: var(--primary);
      margin-top: 3px;
    }
    .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: 12px;
      color: #475569;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .catalog-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-icon-matrix { grid-template-columns: repeat(3, 1fr); }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .product-cards-grid { grid-template-columns: 1fr; }
      .product-box.featured { transform: none; }
      .tech-pipeline-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-grid { grid-template-columns: 1fr; }
      .metrics-row { grid-template-columns: repeat(2, 1fr); gap: 30px; }
      .metric-item { border-right: none; }
      .testimonial-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .guarantee-bar { grid-template-columns: repeat(2, 1fr); }
      .trial-box-container { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .topbar { display: none; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
      }
      .nav-menu.active {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .header-actions {
        display: none;
      }
      .hero-main-title {
        font-size: 32px;
      }
      .hero-icon-matrix {
        grid-template-columns: repeat(2, 1fr);
      }
      .overview-flex {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .tech-pipeline-grid {
        grid-template-columns: 1fr;
      }
      .guarantee-bar {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .fixed-action-bar .bar-info {
        display: none;
      }
      .fixed-action-bar .bar-btns {
        width: 100%;
        justify-content: space-between;
      }
      .fixed-action-bar .bar-btn-solid,
      .fixed-action-bar .bar-btn-outline {
        flex: 1;
        text-align: center;
      }
    }