/* 全局重置与基础变量 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --brand-gradient: linear-gradient(135deg, #f97316, #ec4899, #8b5cf6, #06b6d4);
      --brand-primary: #7c3aed;
      --brand-secondary: #ec4899;
      --brand-accent: #f59e0b;
      --bg-body: #fdfcfb;
      --bg-soft: #fef9f6;
      --bg-card: #ffffff;
      --text-dark: #1e1b2e;
      --text-muted: #5b5568;
      --text-light: #8e8a9a;
      --border-light: #f0ebe6;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 12px 32px rgba(124, 58, 237, 0.08);
      --shadow-lg: 0 24px 48px -12px rgba(124, 58, 237, 0.15);
      --radius-sm: 12px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --container-max: 1240px;
      --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 90px;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-body);
      background-image: radial-gradient(circle at 10% 20%, rgba(249, 115, 22, 0.03) 0%, transparent 30%),
                        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.04) 0%, transparent 35%);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    ul {
      list-style: none;
    }
    h1, h2, h3, h4 {
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-dark);
    }
    h1 {
      font-size: 2.8rem;
      letter-spacing: -0.02em;
    }
    h2 {
      font-size: 2.2rem;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 1.35rem;
    }
    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 48px;
    }
    .section-header p {
      color: var(--text-muted);
      font-size: 1.1rem;
    }
    .section-subtitle {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--brand-primary);
      background: rgba(124, 58, 237, 0.08);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 1rem;
      line-height: 1.4;
      transition: all 0.3s ease;
      cursor: pointer;
      border: none;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--brand-gradient);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(124, 58, 237, 0.25);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 32px rgba(124, 58, 237, 0.35);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--border-light);
      color: var(--text-dark);
    }
    .btn-outline:hover {
      background: var(--bg-soft);
      border-color: var(--brand-primary);
      color: var(--brand-primary);
      transform: translateY(-2px);
    }
    .btn-lg {
      padding: 16px 40px;
      font-size: 1.1rem;
    }
    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.03);
      transition: box-shadow 0.3s;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 76px;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .brand .ai-page-logo {
      max-width: 48px;
      height: auto;
      border-radius: 12px;
    }
    .brand-text {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.01em;
    }
    .brand-text span {
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--brand-primary);
    }
    .ai-page-home-link {
      color: var(--brand-primary) !important;
      font-weight: 600 !important;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .nav-actions .btn {
      padding: 10px 24px;
      font-size: 0.9rem;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      cursor: pointer;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      transition: background 0.2s;
    }
    .menu-toggle:hover {
      background: var(--bg-soft);
    }
    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-dark);
      border-radius: 4px;
      transition: all 0.3s;
    }
    .menu-toggle.active span:nth-child(1) {
      transform: rotate(45deg) translate(5px, 5px);
    }
    .menu-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
      transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Hero */
    .hero {
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 60px;
      align-items: center;
    }
    .hero-badge {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--brand-primary);
      background: rgba(124, 58, 237, 0.08);
      padding: 6px 18px;
      border-radius: 40px;
      margin-bottom: 20px;
    }
    .hero h1 {
      margin-bottom: 20px;
      font-size: 3.2rem;
      letter-spacing: -0.03em;
      background: linear-gradient(145deg, #1e1b2e 30%, #4c3d8a 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 560px;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-stats {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.2;
    }
    .stat-value span {
      font-size: 1rem;
      color: var(--brand-primary);
      font-weight: 600;
    }
    .stat-label {
      font-size: 0.88rem;
      color: var(--text-light);
    }
    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 16px;
      background: linear-gradient(145deg, #faf5ff, #fdf4ff);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(124, 58, 237, 0.08);
    }
    .hero-mini-card {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #fff;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }
    .hero-mini-card:hover {
      transform: translateX(4px);
    }
    .hero-mini-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      background: linear-gradient(135deg, #f97316, #ec4899);
      color: #fff;
      flex-shrink: 0;
    }
    .hero-mini-card:nth-child(2) .hero-mini-icon {
      background: linear-gradient(135deg, #8b5cf6, #06b6d4);
    }
    .hero-mini-card:nth-child(3) .hero-mini-icon {
      background: linear-gradient(135deg, #f59e0b, #ec4899);
    }
    .hero-mini-content h4 {
      font-size: 1rem;
      margin-bottom: 2px;
    }
    .hero-mini-content p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 通用分区 */
    .section {
      padding: 80px 0;
    }
    .section-alt {
      background: var(--bg-soft);
    }

    /* 数据指标卡片 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--bg-card);
      padding: 32px 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      text-align: center;
      transition: all 0.3s;
    }
    .metric-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .metric-number {
      font-size: 2.6rem;
      font-weight: 800;
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      padding: 32px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      transition: all 0.35s;
      box-shadow: var(--shadow-sm);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(124, 58, 237, 0.15);
    }
    .service-icon {
      width: 52px;
      height: 52px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--brand-primary);
    }
    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-item {
      text-align: center;
      padding: 24px 16px;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .step-num {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      color: #fff;
      background: var(--brand-gradient);
    }
    .step-item h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }
    .step-item p {
      font-size: 0.88rem;
      color: var(--text-light);
    }

    /* 对比表格 */
    .table-wrap {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
    }
    .compare-table th,
    .compare-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.95rem;
    }
    .compare-table th {
      background: rgba(124, 58, 237, 0.04);
      font-weight: 700;
      color: var(--text-dark);
      font-size: 0.95rem;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .highlight {
      background: rgba(249, 115, 22, 0.04);
      font-weight: 600;
      color: var(--brand-primary);
    }
    .rating-stars {
      color: #f59e0b;
      letter-spacing: 2px;
      font-size: 1.1rem;
    }
    .score-badge {
      display: inline-block;
      background: var(--brand-gradient);
      color: #fff;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: 20px;
      font-size: 0.9rem;
    }

    /* FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: box-shadow 0.3s;
    }
    .faq-item:hover {
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 20px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      text-align: left;
      font-family: inherit;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(124, 58, 237, 0.02);
    }
    .faq-icon {
      font-size: 1.4rem;
      color: var(--brand-primary);
      transition: transform 0.3s;
      flex-shrink: 0;
      width: 24px;
      text-align: center;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }
    .faq-answer p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 16px;
      transition: all 0.3s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #f59e0b;
      font-size: 1rem;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 12px;
      border-top: 1px solid var(--border-light);
    }
    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--brand-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .review-name {
      font-weight: 700;
      font-size: 0.92rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: stretch;
    }
    .case-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .case-img-wrap {
      aspect-ratio: 16/9;
      overflow: hidden;
      background: var(--bg-soft);
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-body {
      padding: 24px;
    }
    .case-body h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }
    .case-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 文章列表 + 友情链接 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 32px;
    }
    .article-link {
      display: block;
      background: var(--bg-card);
      padding: 18px 22px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      font-weight: 500;
      color: var(--text-dark);
      transition: all 0.3s;
      box-shadow: var(--shadow-sm);
    }
    .article-link:hover {
      border-color: var(--brand-primary);
      color: var(--brand-primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 20px;
      justify-content: center;
      padding: 20px 0;
    }
    .friend-links a {
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: color 0.2s;
      padding: 4px 8px;
      border-radius: 6px;
    }
    .friend-links a:hover {
      color: var(--brand-primary);
      background: rgba(124, 58, 237, 0.05);
    }

    /* 表单 */
    .form-wrap {
      max-width: 760px;
      margin: 0 auto;
      background: var(--bg-card);
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: 1 / -1;
    }
    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-dark);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--border-light);
      font-size: 0.95rem;
      font-family: inherit;
      background: var(--bg-body);
      transition: border-color 0.2s, box-shadow 0.2s;
      color: var(--text-dark);
      width: 100%;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--brand-primary);
      box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.08);
    }
    .form-group textarea {
      min-height: 100px;
      resize: vertical;
    }
    .form-submit {
      grid-column: 1 / -1;
      margin-top: 8px;
    }
    .form-submit .btn {
      width: 100%;
    }
    .form-note {
      font-size: 0.85rem;
      color: var(--text-light);
      text-align: center;
      margin-top: 16px;
    }

    /* 联系我们 + 二维码 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 0.7fr;
      gap: 40px;
      align-items: start;
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .contact-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(124, 58, 237, 0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--brand-primary);
      flex-shrink: 0;
    }
    .contact-item strong {
      display: block;
      font-size: 0.95rem;
      margin-bottom: 2px;
    }
    .contact-item span {
      font-size: 0.92rem;
      color: var(--text-muted);
      word-break: break-all;
    }
    .qr-card {
      background: var(--bg-card);
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .qr-card img {
      max-width: 180px;
      margin: 0 auto 16px;
      border-radius: var(--radius-sm);
    }
    .qr-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .tag-cloud span {
      background: var(--bg-card);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      color: var(--text-muted);
      border: 1px solid var(--border-light);
      transition: all 0.25s;
      cursor: default;
    }
    .tag-cloud span:hover {
      background: var(--brand-gradient);
      color: #fff;
      border-color: transparent;
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    /* 价格参考卡片 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: var(--bg-card);
      padding: 32px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      display: flex;
      flex-direction: column;
    }
    .price-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .price-card.featured {
      border-color: rgba(124, 58, 237, 0.3);
      background: linear-gradient(180deg, #ffffff, #faf5ff);
      box-shadow: var(--shadow-md);
    }
    .price-name {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .price-value {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.2;
    }
    .price-value small {
      font-size: 0.9rem;
      font-weight: 400;
      color: var(--text-light);
    }
    .price-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin: 12px 0 20px;
      flex: 1;
    }

    /* 时间线 */
    .timeline {
      display: flex;
      flex-direction: column;
      gap: 0;
      max-width: 760px;
      margin: 0 auto;
      position: relative;
    }
    .timeline-item {
      display: flex;
      gap: 24px;
      padding-bottom: 28px;
      position: relative;
    }
    .timeline-item:last-child {
      padding-bottom: 0;
    }
    .timeline-marker {
      width: 40px;
      display: flex;
      flex-direction: column;
      align-items: center;
      flex-shrink: 0;
    }
    .timeline-dot {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--brand-gradient);
      margin-top: 6px;
      flex-shrink: 0;
    }
    .timeline-line {
      width: 2px;
      flex: 1;
      background: linear-gradient(180deg, var(--brand-primary), var(--border-light));
      margin-top: 8px;
    }
    .timeline-item:last-child .timeline-line {
      display: none;
    }
    .timeline-content h4 {
      font-size: 1.05rem;
      margin-bottom: 4px;
    }
    .timeline-content p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 100px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }
    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      cursor: pointer;
      transition: all 0.3s;
      border: 1px solid var(--border-light);
      color: var(--brand-primary);
      position: relative;
    }
    .float-btn:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: 0 12px 28px rgba(124, 58, 237, 0.2);
    }
    .back-top {
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
    }
    .back-top.visible {
      opacity: 1;
      visibility: visible;
    }

    /* 页脚 */
    .site-footer {
      background: #1e1b2e;
      color: rgba(255, 255, 255, 0.75);
      padding: 48px 0 28px;
      margin-top: 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand p {
      font-size: 0.9rem;
      margin-top: 12px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.6);
    }
    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 16px;
    }
    .footer-col a {
      display: block;
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 10px;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: #fff;
    }
    .footer-bottom {
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.5);
    }
    .footer-bottom a {
      color: rgba(255, 255, 255, 0.6);
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* 动画 */
    .fade-in {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero h1 {
        font-size: 2.6rem;
      }
      .hero-visual {
        max-width: 500px;
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-grid {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 820px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
        font-size: 0.95rem;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-actions .btn {
        display: none;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
      .section {
        padding: 56px 0;
      }
      h2 {
        font-size: 1.8rem;
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .price-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin: 0 auto;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }
    @media (max-width: 600px) {
      .container {
        padding-left: 18px;
        padding-right: 18px;
      }
      .hero {
        padding: 48px 0 36px;
      }
      .hero h1 {
        font-size: 1.9rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .hero-stats {
        gap: 24px;
      }
      .metric-grid {
        grid-template-columns: 1fr;
      }
      .services-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-wrap {
        padding: 24px;
      }
      .article-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .float-service {
        right: 14px;
        bottom: 80px;
      }
      .float-btn {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
      }
    }