:root {
      --primary: #6d28d9;
      --primary-hover: #5b21b6;
      --primary-light: #ede9fe;
      --accent: #d946ef;
      --accent-soft: #fae8ff;
      --text-dark: #1e1b4b;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-page: #faf8ff;
      --bg-surface: #ffffff;
      --bg-alt: #f5f3ff;
      --border-color: #e4e1f5;
      --shadow-sm: 0 4px 6px -1px rgba(109, 40, 217, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(109, 40, 217, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(109, 40, 217, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      background-image: 
        radial-gradient(circle at 10% 15%, rgba(217, 70, 239, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(109, 40, 217, 0.04) 0%, transparent 45%);
      color: var(--text-body);
      line-height: 1.6;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--primary-hover);
    }

    .ai-container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
      width: 100%;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(109, 40, 217, 0.03);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .logo-box {
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-body);
      font-weight: 500;
      font-size: 0.95rem;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(109, 40, 217, 0.25);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(109, 40, 217, 0.35);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: transparent;
    }
    .btn-outline:hover {
      background: var(--primary-light);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-dark);
      cursor: pointer;
      padding: 6px;
    }

    /* 首屏 Hero (不使用任何图片) */
    .hero-section {
      padding: 64px 0 56px;
      position: relative;
    }
    .hero-wrapper {
      background: linear-gradient(135deg, #ffffff 0%, #faf5ff 50%, #f3e8ff 100%);
      border: 1px solid #d8b4fe;
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      box-shadow: var(--shadow-md);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .hero-wrapper::before {
      content: "";
      position: absolute;
      top: -100px;
      right: -100px;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(217, 70, 239, 0.15) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-light);
      border: 1px solid #c4b5fd;
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 2.3rem;
      color: var(--text-dark);
      font-weight: 800;
      line-height: 1.28;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      max-width: 820px;
    }
    .hero-desc {
      font-size: 1.08rem;
      color: var(--text-body);
      max-width: 780px;
      line-height: 1.7;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-hero-main {
      padding: 13px 32px;
      font-size: 1.05rem;
      border-radius: 30px;
    }
    .hero-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 960px;
    }
    .chip {
      background: #ffffff;
      border: 1px solid #e9d5ff;
      color: #6b21a8;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.78rem;
      font-weight: 500;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
    }

    /* 通用区块排版 */
    .section-block {
      padding: 64px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 44px;
    }
    .section-tag {
      text-transform: uppercase;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 1.95rem;
      color: var(--text-dark);
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.35;
    }
    .section-subtitle {
      font-size: 0.98rem;
      color: var(--text-muted);
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    /* 指标网格 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 36px;
    }
    .metric-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: #c4b5fd;
    }
    .metric-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      display: block;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-body);
      font-weight: 600;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .feature-card:hover {
      border-color: #c084fc;
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .card-badge {
      display: inline-block;
      align-self: flex-start;
      padding: 3px 10px;
      font-size: 0.75rem;
      border-radius: 12px;
      background: var(--accent-soft);
      color: #a21caf;
      font-weight: 600;
      margin-bottom: 14px;
    }
    .feature-card h3 {
      font-size: 1.2rem;
      color: var(--text-dark);
      margin-bottom: 10px;
      font-weight: 700;
    }
    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 对比评测表格 */
    .eval-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .eval-highlight-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 20px 24px;
      background: linear-gradient(135deg, #f3e8ff 0%, #faf5ff 100%);
      border: 1px solid #d8b4fe;
      border-radius: var(--radius-md);
      margin-bottom: 28px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-stars {
      color: #eab308;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }
    .score-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
    }
    .score-total {
      font-size: 1rem;
      color: var(--text-muted);
      font-weight: 600;
    }
    .table-container {
      overflow-x: auto;
      border-radius: var(--radius-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .eval-table th {
      background: #f8f6fc;
      padding: 16px 20px;
      font-weight: 700;
      color: var(--text-dark);
      border-bottom: 2px solid #e9d5ff;
    }
    .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-body);
    }
    .eval-table tr:hover td {
      background: #faf8ff;
    }
    .tag-strong {
      color: #7e22ce;
      font-weight: 700;
    }

    /* 流程步骤 */
    .steps-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .step-num {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 1.05rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 案例中心图文展示 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .media-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #c4b5fd;
    }
    .media-thumb-box {
      width: 100%;
      height: 220px;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .media-thumb-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }
    .media-card:hover .media-thumb-box img {
      transform: scale(1.03);
    }
    .media-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .media-body h4 {
      font-size: 1.05rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .media-body p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.55;
    }

    /* 宣传图画廊 */
    .banner-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 32px;
    }
    .banner-item {
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }
    .banner-item img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      display: block;
    }

    /* 客户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .reviewer-avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .reviewer-name {
      font-weight: 700;
      color: var(--text-dark);
      font-size: 0.95rem;
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.open {
      border-color: #c084fc;
    }
    .faq-trigger {
      width: 100%;
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      background: #faf8ff;
      color: var(--text-body);
      font-size: 0.92rem;
      line-height: 1.65;
    }
    .faq-item.open .faq-content {
      padding: 16px 24px 20px;
      max-height: 300px;
    }

    /* 需求匹配与表单 */
    .form-wrap-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1.3fr;
      gap: 40px;
    }
    .form-info h3 {
      font-size: 1.45rem;
      color: var(--text-dark);
      margin-bottom: 16px;
    }
    .form-info p {
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .form-contacts-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .form-contacts-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-dark);
      font-size: 0.92rem;
    }
    .qr-box {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-alt);
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #e9d5ff;
    }
    .qr-box img {
      width: 80px;
      height: 80px;
      border-radius: var(--radius-sm);
      object-fit: cover;
    }
    .qr-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-dark);
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-dark);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

    /* 资讯与文章列表 */
    .article-links-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      background: #faf8ff;
      border: 1px solid #f1e8ff;
      transition: all 0.2s ease;
    }
    .article-item:hover {
      background: #f3e8ff;
      border-color: #c4b5fd;
    }
    .article-item a {
      color: var(--text-dark);
      font-weight: 600;
      font-size: 0.95rem;
    }
    .article-date {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 底部通用区域 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding-top: 56px;
      padding-bottom: 32px;
      color: var(--text-body);
      margin-top: 48px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
    }
    .footer-nav {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-nav a {
      color: var(--text-body);
      font-size: 0.88rem;
    }
    .footer-nav a:hover {
      color: var(--primary);
    }
    .footer-friends {
      border-top: 1px solid #f1e8ff;
      padding-top: 24px;
      margin-bottom: 24px;
    }
    .footer-friends-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .friends-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .friends-links a {
      color: var(--text-muted);
      font-size: 0.82rem;
    }
    .friends-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 悬浮客服挂件与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid #c4b5fd;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(109, 40, 217, 0.15);
      cursor: pointer;
      font-size: 1.15rem;
      transition: all 0.25s ease;
      text-decoration: none;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 响应式断点控制 */
    @media (max-width: 992px) {
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-wrap-box {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 1.85rem;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
      .grid-3, .grid-4, .grid-2,
      .steps-timeline, .media-gallery-grid,
      .reviews-grid, .banner-row, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-wrapper {
        padding: 36px 20px;
      }
      .hero-title {
        font-size: 1.55rem;
      }
      .hero-desc {
        font-size: 0.95rem;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }