/* roulang page: index */
:root {
      --primary: #0F766E;
      --primary-hover: #115E59;
      --accent: #06B6D4;
      --accent-hover: #0891B2;
      --success: #10B981;
      --warning: #F59E0B;
      --bg: #FAFAFA;
      --bg-white: #FFFFFF;
      --dark-surface: #0F172A;
      --dark-surface-2: #1E293B;
      --text-main: #0F172A;
      --text-secondary: #475569;
      --text-muted: #94A3B8;
      --border: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-family);
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
      border-bottom: 1px solid var(--border);
    }
    .top-bar {
      background: #F8FAFC;
      border-bottom: 1px solid #EEF2F6;
      height: 38px;
      font-size: 13px;
      color: var(--text-secondary);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 100%;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 500;
    }
    .status-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--success);
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
    }
    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }
    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-bar-right span {
      display: flex;
      align-items: center;
      gap: 5px;
    }
    .main-nav {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 6px 2px;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-cta-btn {
      padding: 9px 20px;
      background: var(--primary);
      color: #FFFFFF !important;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
    }
    .nav-cta-btn:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    /* 移动端侧滑抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 1000;
      background: rgba(15, 23, 42, 0.6);
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .mobile-drawer.active {
      opacity: 1;
      pointer-events: auto;
    }
    .mobile-drawer-content {
      position: absolute;
      top: 0;
      right: 0;
      width: 80%;
      max-width: 320px;
      height: 100%;
      background: #FFFFFF;
      padding: 24px;
      display: flex;
      flex-direction: column;
      transform: translateX(100%);
      transition: transform 0.3s ease;
      box-shadow: -4px 0 20px rgba(0,0,0,0.15);
    }
    .mobile-drawer.active .mobile-drawer-content {
      transform: translateX(0);
    }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 20px;
    }
    .drawer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .drawer-nav-list a {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: block;
      padding: 6px 0;
    }
    /* 通用板块与排版 */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--dark-surface);
      color: #FFFFFF;
    }
    .section-alt {
      background-color: #F8FAFC;
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 56px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--primary);
      margin-bottom: 12px;
      background: rgba(15, 118, 110, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
    }
    .section-dark .section-tag {
      color: var(--accent);
      background: rgba(6, 182, 212, 0.15);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-subtitle {
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-secondary);
    }
    .section-dark .section-subtitle {
      color: var(--text-muted);
    }
    /* 卡片系统 */
    .card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(15, 118, 110, 0.3);
    }
    .card-dark {
      background: var(--dark-surface-2);
      border-color: var(--border-dark);
      color: #FFFFFF;
    }
    .card-dark:hover {
      border-color: var(--accent);
    }
    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 16px rgba(15, 118, 110, 0.28);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(15, 118, 110, 0.38);
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: var(--border);
      background: #FFFFFF;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #F8FAFC;
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
      background: transparent;
    }
    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.1);
    }
    /* 板块 1: Hero 首屏 */
    .hero-section {
      padding: 60px 0 80px;
      background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(15, 118, 110, 0.06) 0%, transparent 50%),
                  #FAFAFA;
      border-bottom: 1px solid var(--border);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(15, 118, 110, 0.1);
      border: 1px solid rgba(15, 118, 110, 0.2);
      border-radius: 30px;
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .hero-title span {
      color: var(--primary);
      position: relative;
    }
    .hero-desc {
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-secondary);
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-trust {
      display: flex;
      align-items: center;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
      font-size: 13px;
      color: var(--text-muted);
    }
    .hero-trust-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-image-wrapper {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.18);
      border: 1px solid var(--border);
      background: #FFFFFF;
    }
    .hero-image-wrapper img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      display: block;
    }
    .hero-float-stat {
      position: absolute;
      bottom: 24px;
      left: 24px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      color: #FFFFFF;
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
      display: flex;
      align-items: center;
      gap: 16px;
    }
    /* 板块 2: 数据看板 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--dark-surface-2);
      border: 1px solid var(--border-dark);
      padding: 28px 24px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .metric-val {
      font-size: 40px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.1;
      margin-bottom: 8px;
      font-variant-numeric: tabular-nums;
    }
    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .metric-footer-note {
      text-align: right;
      margin-top: 24px;
      font-size: 13px;
      color: var(--text-muted);
    }
    /* 板块 3: 服务矩阵与接入 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .matrix-icon {
      width: 48px;
      height: 48px;
      background: rgba(15, 118, 110, 0.08);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .matrix-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .matrix-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .matrix-meta {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      padding-top: 14px;
      border-top: 1px dashed var(--border);
      display: flex;
      justify-content: space-between;
    }
    /* 板块 4: 核心能力六格阵 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-card {
      position: relative;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
    }
    .advantage-index {
      position: absolute;
      top: 24px;
      right: 28px;
      font-size: 28px;
      font-weight: 800;
      color: #E2E8F0;
      line-height: 1;
    }
    .advantage-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .advantage-desc {
      font-size: 14px;
      line-height: 1.68;
      color: var(--text-secondary);
    }
    /* 板块 5: 模块化产品家族 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: var(--shadow-md);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .product-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 10px 30px rgba(15, 118, 110, 0.15);
    }
    .product-badge-flag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 16px;
      border-radius: 20px;
    }
    .product-name {
      font-size: 22px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .product-target {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .product-features-list {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .product-features-list li {
      font-size: 14px;
      color: var(--text-secondary);
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.5;
    }
    .product-features-list svg {
      flex-shrink: 0;
      margin-top: 3px;
      color: var(--success);
    }
    .product-spec-footer {
      border-top: 1px solid var(--border);
      padding-top: 20px;
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* 板块 6: 新旧对比台 */
    .compare-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .compare-box {
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border);
    }
    .compare-box.old {
      background: #F8FAFC;
      border-color: #E2E8F0;
    }
    .compare-box.new {
      background: #F0FDF4;
      border-color: #BBF7D0;
      box-shadow: 0 8px 24px rgba(16, 185, 129, 0.08);
    }
    .compare-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .compare-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      line-height: 1.6;
    }
    .compare-box.old .compare-item {
      color: #64748B;
    }
    .compare-box.new .compare-item {
      color: #166534;
      font-weight: 500;
    }
    /* 板块 7: 架构保障 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .arch-content h3 {
      font-size: 26px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      line-height: 1.35;
    }
    .arch-content p {
      color: #94A3B8;
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .arch-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 30px;
    }
    .arch-points li {
      color: #E2E8F0;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .arch-img-frame {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: var(--shadow-lg);
    }
    .arch-img-frame img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    /* 板块 8: 里程碑流程 */
    .milestone-track {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      position: relative;
    }
    .milestone-track::before {
      content: "";
      position: absolute;
      top: 32px;
      left: 30px;
      right: 30px;
      height: 2px;
      background: #E2E8F0;
      z-index: 1;
    }
    .milestone-node {
      position: relative;
      z-index: 2;
      background: #FFFFFF;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .milestone-step-bubble {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      background: #F1F5F9;
      color: var(--primary);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 1px var(--border);
    }
    .milestone-node.completed .milestone-step-bubble {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15);
    }
    .milestone-node h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .milestone-node p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.55;
    }
    /* 板块 9: 场景实践故事 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
    }
    .story-main-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .story-main-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
    }
    .story-metrics-badge {
      display: flex;
      gap: 24px;
      background: #F8FAFC;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      margin-top: 24px;
      border-left: 4px solid var(--primary);
    }
    .story-side-cards {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .story-mini-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .story-mini-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
    }
    .story-mini-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .story-mini-card p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    /* 板块 10: 客户评价背书 */
    .reviews-overall {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #F8FAFC;
      border: 1px solid var(--border);
      padding: 8px 20px;
      border-radius: 30px;
      margin-bottom: 32px;
      font-size: 14px;
      font-weight: 600;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .review-body {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .review-avatar-ph {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-secondary);
      font-size: 14px;
    }
    /* 板块 11: 技术与知识资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-img-box {
      width: 100%;
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .news-card:hover .news-img-box img {
      transform: scale(1.04);
    }
    .news-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .news-meta-tag {
      color: var(--primary);
      font-weight: 600;
      background: rgba(15, 118, 110, 0.08);
      padding: 2px 8px;
      border-radius: 4px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
      line-height: 1.45;
    }
    .news-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .news-btn {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 0;
      text-align: left;
    }
    /* 板块 12: FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: rgba(15, 118, 110, 0.4);
      box-shadow: 0 4px 16px rgba(15, 118, 110, 0.06);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .faq-icon {
      width: 20px;
      height: 20px;
      transition: transform 0.3s ease;
      color: var(--text-muted);
      flex-shrink: 0;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
    }
    /* 板块 13: 转化表单与预约 */
    .contact-card-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
    }
    .contact-info-side {
      background: linear-gradient(145deg, #0F766E, #0F172A);
      color: #FFFFFF;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-side h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .contact-info-side p {
      color: #CBD5E1;
      font-size: 15px;
      line-height: 1.68;
      margin-bottom: 32px;
    }
    .contact-perks {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 32px;
    }
    .contact-perks li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: #F8FAFC;
    }
    .contact-form-side {
      padding: 48px;
      background: #FFFFFF;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #F8FAFC;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
    }
    .form-grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-privacy-note {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 14px;
      line-height: 1.5;
    }
    /* 页脚样式 */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      border-top: 1px solid #1E293B;
      padding: 72px 0 32px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-brand h3 {
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-brand p {
      line-height: 1.65;
      margin-bottom: 20px;
      font-size: 13px;
      color: #94A3B8;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 13px;
    }
    .footer-contact-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
      gap: 16px;
    }
    .footer-bottom a:hover {
      color: #94A3B8;
    }
    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .top-bar { display: none; }
      .nav-links, .nav-cta-wrap { display: none; }
      .mobile-menu-toggle { display: block; }
      .hero-grid { grid-template-columns: 1fr; gap: 36px; }
      .metric-grid { grid-template-columns: repeat(2, 1fr); }
      .matrix-grid { grid-template-columns: repeat(2, 1fr); }
      .advantages-grid { grid-template-columns: repeat(2, 1fr); }
      .products-grid { grid-template-columns: 1fr; }
      .compare-container { grid-template-columns: 1fr; }
      .arch-grid { grid-template-columns: 1fr; }
      .milestone-track { grid-template-columns: 1fr; }
      .milestone-track::before { display: none; }
      .stories-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .contact-card-box { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 640px) {
      section { padding: 56px 0; }
      .hero-title { font-size: 30px; }
      .section-title { font-size: 24px; }
      .metric-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr; }
      .advantages-grid { grid-template-columns: 1fr; }
      .form-grid-2 { grid-template-columns: 1fr; }
      .contact-info-side, .contact-form-side { padding: 28px 20px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }