/* ----- 全局基底与重置 ----- */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --bg: #fdfaf6;
      --bg-gradient: linear-gradient(145deg, #fff8f0 0%, #fefcf9 100%);
      --surface: #ffffff;
      --text-primary: #1e1b18;
      --text-secondary: #4a423c;
      --text-muted: #6f655d;
      --accent: #ff6b35;
      --accent-soft: #ffede6;
      --accent-deep: #e85d2c;
      --border-light: #f0e7df;
      --card-shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.08);
      --card-hover-shadow: 0 24px 48px -16px rgba(255, 107, 53, 0.22);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition: 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-gradient);
      background-attachment: fixed;
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    /* 统一容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 头部/主体/尾部使用统一容器宽度 */
    header .container,
    main .container,
    footer .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
      margin-left: auto;
      margin-right: auto;
    }

    /* 动画 */
    @keyframes fadeUp {
      from {
        opacity: 0;
        transform: translateY(24px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(253, 250, 246, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(240, 231, 223, 0.6);
      padding: 12px 0;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      max-width: 100%;
      height: auto;
      width: auto;
      max-height: 44px;
      display: block;
    }

    .brand-name {
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--text-primary);
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      margin-left: auto;
      margin-right: 16px;
    }

    .nav-links a {
      display: block;
      padding: 6px 12px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      text-decoration: none;
      border-radius: 40px;
      transition: color var(--transition), background var(--transition);
      white-space: nowrap;
    }

    .nav-links a:hover {
      color: var(--accent);
      background: var(--accent-soft);
    }

    .header-cta {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      border-radius: 60px;
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      cursor: pointer;
      transition: all var(--transition);
      padding: 10px 22px;
      letter-spacing: 0.3px;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--accent);
      color: #ffffff;
      box-shadow: 0 8px 20px -6px rgba(255, 107, 53, 0.38);
    }

    .btn-primary:hover {
      background: var(--accent-deep);
      box-shadow: 0 14px 28px -8px rgba(255, 107, 53, 0.55);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-primary);
      border: 1.5px solid rgba(255, 107, 53, 0.3);
    }

    .btn-outline:hover {
      border-color: var(--accent);
      background: var(--accent-soft);
      transform: translateY(-2px);
    }

    .btn-large {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    /* 移动菜单按钮 */
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1.5px solid var(--border-light);
      border-radius: 40px;
      padding: 8px 14px;
      font-size: 1rem;
      color: var(--text-secondary);
      cursor: pointer;
      align-items: center;
      gap: 6px;
      transition: all var(--transition);
    }

    .menu-toggle:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    /* 移动菜单展开 */
    .nav-links.active {
      display: flex;
      flex-direction: column;
      width: 100%;
      margin-top: 8px;
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 12px;
      box-shadow: var(--card-shadow);
      gap: 4px;
    }

    .nav-links.active a {
      padding: 10px 16px;
      border-radius: var(--radius-sm);
    }

    /* 首屏 HERO — 无图 */
    .hero {
      padding: 64px 0 48px;
      background: transparent;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.8rem;
      line-height: 1.2;
      font-weight: 800;
      color: var(--text-primary);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .hero-content .hero-sub {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 28px;
      max-width: 540px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 32px;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 24px 32px;
      align-items: center;
      color: var(--text-muted);
      font-size: 0.9rem;
      border-top: 1px solid var(--border-light);
      padding-top: 22px;
    }

    .hero-meta span {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .hero-meta strong {
      color: var(--text-primary);
      font-weight: 700;
    }

    /* 装饰性数据卡片 — 首屏右侧，纯CSS */
    .hero-deco {
      display: flex;
      flex-direction: column;
      gap: 18px;
      justify-content: center;
      align-items: stretch;
    }

    .deco-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 22px 26px;
      box-shadow: var(--card-shadow);
      border: 1px solid rgba(255, 107, 53, 0.08);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .deco-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }

    .deco-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: var(--accent-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--accent);
      flex-shrink: 0;
      font-weight: 700;
    }

    .deco-card strong {
      display: block;
      font-size: 1.3rem;
      color: var(--text-primary);
      line-height: 1.3;
    }

    .deco-card span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 区块通用 */
    .section {
      padding: 64px 0;
    }

    .section-header {
      margin-bottom: 44px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 5px 16px;
      border-radius: 40px;
      letter-spacing: 0.6px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.2;
      letter-spacing: -0.01em;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 680px;
    }

    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(255, 107, 53, 0.2);
    }

    .card-icon {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 2px;
    }

    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-primary);
    }

    .card p {
      font-size: 0.92rem;
      color: var(--text-secondary);
      line-height: 1.65;
      flex: 1;
    }

    /* 数据指标行 */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .stat-item {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      text-align: center;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      transition: transform var(--transition);
    }

    .stat-item:hover {
      transform: scale(1.02);
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 流程步骤 */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }

    .step-item {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      counter-increment: step;
      transition: transform var(--transition);
    }

    .step-item:hover {
      transform: translateY(-4px);
    }

    .step-item::before {
      content: counter(step, decimal-leading-zero);
      display: inline-block;
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 12px;
      line-height: 1;
    }

    .step-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-secondary);
    }

    /* 对比表格 */
    .comparison-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      background: var(--surface);
      box-shadow: var(--card-shadow);
      margin-top: 12px;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.92rem;
      min-width: 640px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
    }

    .comparison-table thead th {
      background: #fff5f0;
      font-weight: 700;
      color: var(--text-primary);
      font-size: 0.95rem;
    }

    .comparison-table tbody tr:last-child td {
      border-bottom: none;
    }

    .comparison-table tbody tr:hover {
      background: #fffaf7;
    }

    .rating-stars {
      color: #ffb800;
      letter-spacing: 1px;
      font-size: 1rem;
    }

    .score-highlight {
      font-weight: 800;
      font-size: 1.3rem;
      color: var(--accent);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 26px 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      transition: transform var(--transition), box-shadow var(--transition);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-secondary);
      line-height: 1.7;
      flex: 1;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 8px;
      border-top: 1px solid var(--border-light);
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--accent-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent);
      font-size: 0.9rem;
    }

    .review-name {
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text-primary);
    }

    .review-role {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* 案例 & 文章 */
    .showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .image-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .image-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }

    .image-card .img-wrap {
      width: 100%;
      overflow: hidden;
      background: #f5f0eb;
    }

    .image-card .img-wrap img {
      display: block;
      width: 100%;
      height: auto;
      transition: transform 0.5s ease;
    }

    .image-card:hover .img-wrap img {
      transform: scale(1.03);
    }

    .image-card .caption {
      padding: 18px 22px 22px;
    }

    .image-card .caption h3 {
      font-size: 1.1rem;
      margin-bottom: 6px;
    }

    .image-card .caption p {
      font-size: 0.88rem;
      color: var(--text-secondary);
    }

    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 24px;
    }

    .article-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 14px 20px;
      background: var(--surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      color: var(--text-primary);
      text-decoration: none;
      font-size: 0.95rem;
      transition: all var(--transition);
    }

    .article-link:hover {
      border-color: var(--accent);
      background: #fffaf7;
      transform: translateX(4px);
    }

    .article-link .arrow {
      color: var(--accent);
      font-size: 1.2rem;
      flex-shrink: 0;
    }

    /* 表单 */
    .form-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .form-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-primary);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--border-light);
      background: #fefcf9;
      font-family: var(--font-sans);
      font-size: 0.95rem;
      color: var(--text-primary);
      transition: border-color var(--transition), box-shadow var(--transition);
      outline: none;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
    }

    .form-group textarea {
      min-height: 100px;
      resize: vertical;
    }

    .form-submit {
      width: 100%;
      margin-top: 8px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 28px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-secondary);
    }

    .contact-item strong {
      color: var(--text-primary);
      display: block;
      font-size: 0.85rem;
    }

    .kefu-qr {
      margin-top: 12px;
    }

    .kefu-qr img {
      width: 130px;
      height: auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }

    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .faq-item {
      background: var(--surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: border-color var(--transition), box-shadow var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(255, 107, 53, 0.3);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 24px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.98rem;
      color: var(--text-primary);
      transition: background var(--transition);
      gap: 16px;
    }

    .faq-question:hover {
      background: #fffaf7;
    }

    .faq-question .icon {
      flex-shrink: 0;
      font-size: 1.2rem;
      color: var(--accent);
      transition: transform var(--transition);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      color: var(--text-secondary);
      font-size: 0.92rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    .faq-item.active .faq-question .icon {
      transform: rotate(45deg);
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .tag {
      display: inline-block;
      padding: 6px 16px;
      background: var(--surface);
      border: 1px solid var(--border-light);
      border-radius: 40px;
      font-size: 0.82rem;
      color: var(--text-secondary);
      transition: all var(--transition);
      cursor: default;
    }

    .tag:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--accent-soft);
      transform: translateY(-2px);
    }

    /* 友情链接 */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 18px 28px;
      align-items: center;
      margin-top: 12px;
    }

    .friend-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.88rem;
      transition: color var(--transition);
    }

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

    /* 页脚 */
    .site-footer {
      background: #1e1b18;
      color: #cbc3bc;
      padding: 44px 0 28px;
      margin-top: 24px;
    }

    .site-footer .container {
      max-width: 1200px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .ai-page-logo {
      max-height: 40px;
      width: auto;
      
      opacity: 0.9;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: #a89f97;
      line-height: 1.7;
      max-width: 320px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 0.95rem;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-col a {
      display: block;
      color: #a89f97;
      text-decoration: none;
      font-size: 0.85rem;
      margin-bottom: 10px;
      transition: color var(--transition);
    }

    .footer-col a:hover {
      color: #ff8c5e;
    }

    .footer-bottom {
      padding-top: 22px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.8rem;
      color: #7f756d;
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      bottom: 28px;
      right: 24px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: flex-end;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--accent);
      color: #ffffff;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      cursor: pointer;
      box-shadow: 0 10px 24px -8px rgba(255, 107, 53, 0.5);
      transition: all var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--accent-deep);
      transform: scale(1.08);
    }

    .qr-pop {
      display: none;
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 12px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-light);
    }

    .qr-pop.show {
      display: block;
      animation: fadeUp 0.25s ease;
    }

    .qr-pop img {
      width: 140px;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    /* 返回顶部 */
    .back-to-top {
      position: fixed;
      bottom: 28px;
      left: 24px;
      z-index: 200;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--surface);
      color: var(--text-primary);
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      transition: all var(--transition);
      opacity: 0;
      visibility: hidden;
    }

    .back-to-top.show {
      opacity: 1;
      visibility: visible;
    }

    .back-to-top:hover {
      background: var(--accent-soft);
      color: var(--accent);
      border-color: var(--accent);
    }

    /* 响应式 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .hero-content h1 {
        font-size: 2.2rem;
      }

      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }

      .stats-row {
        grid-template-columns: repeat(2, 1fr);
      }

      .form-wrap {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }

      .menu-toggle {
        display: flex;
      }

      .header-inner {
        flex-wrap: wrap;
      }

      .hero-content h1 {
        font-size: 1.8rem;
      }

      .section-title {
        font-size: 1.6rem;
      }

      .card-grid {
        grid-template-columns: 1fr;
      }

      .reviews-grid {
        grid-template-columns: 1fr;
      }

      .showcase-grid {
        grid-template-columns: 1fr;
      }

      .steps-row {
        grid-template-columns: 1fr;
      }

      .stats-row {
        grid-template-columns: 1fr 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .compare-table-wrap {
        overflow-x: auto;
      }

      .faq-question {
        font-size: 0.92rem;
        padding: 16px 18px;
      }

      .form-card {
        padding: 24px 20px;
      }

      .hero {
        padding: 40px 0 32px;
      }

      .section {
        padding: 44px 0;
      }
    }

    @media (max-width: 480px) {
      .hero-content h1 {
        font-size: 1.5rem;
      }

      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .btn-large {
        padding: 12px 22px;
        font-size: 0.95rem;
      }

      .stats-row {
        grid-template-columns: 1fr;
      }

      .header-cta .btn {
        padding: 8px 16px;
        font-size: 0.85rem;
      }
    }

    /* 分栏辅助 */
    .flex-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .text-accent {
      color: var(--accent);
    }

    .mt-4 {
      margin-top: 24px;
    }

    .mb-4 {
      margin-bottom: 24px;
    }

    .ai-page-image {
      max-width: 100%;
      height: auto;
    }