:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --accent-orange: #FF5722;
      --accent-cyan: #00B4D8;
      --accent-magenta: #D946EF;
      --accent-yellow: #F59E0B;
      --bg-page: #F8FAFC;
      --bg-surface: #FFFFFF;
      --bg-subtle: #EDF2F7;
      --text-dark: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 24px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-page);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 撞色艳色风 - 装饰性背景层 (贯穿全页) */
    .page-wrapper {
      position: relative;
      background: radial-gradient(circle at 10% 10%, rgba(79, 70, 229, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 40%, rgba(255, 87, 34, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 50% 80%, rgba(0, 180, 216, 0.04) 0%, transparent 50%);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .brand-area .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-tag {
      background: linear-gradient(135deg, var(--accent-orange), var(--accent-magenta));
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
    }

    /* 严格要求的 css 属性: gap 必须为 0 */
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 10px 14px;
      color: var(--text-dark);
      text-decoration: none;
      font-weight: 600;
      font-size: 15px;
      transition: color 0.2s ease, background-color 0.2s ease;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.06);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 26px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 30px;
      text-decoration: none;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #6366F1);
      color: #FFFFFF;
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 22px rgba(79, 70, 229, 0.4);
      color: #FFFFFF;
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent-orange), #F97316);
      color: #FFFFFF;
      box-shadow: 0 6px 18px rgba(255, 87, 34, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 22px rgba(255, 87, 34, 0.4);
      color: #FFFFFF;
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background-color: transparent;
    }

    .btn-outline:hover {
      background-color: var(--primary);
      color: #FFFFFF;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-dark);
      padding: 8px;
    }

    /* 块区通用样式 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      border: 1px solid rgba(79, 70, 229, 0.3);
      border-radius: 50px;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 36px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO 区域 - 严禁包含图片 */
    .hero-section {
      padding: 90px 0 70px 0;
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      border-bottom: 3px solid var(--primary);
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge-wrap {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .vibrant-chip {
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      color: #FFF;
    }
    .chip-1 { background: var(--accent-orange); }
    .chip-2 { background: var(--primary); }
    .chip-3 { background: var(--accent-cyan); }
    .chip-4 { background: var(--accent-magenta); }

    .hero-title {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary), var(--accent-magenta));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 20px;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
      font-weight: 500;
    }

    .hero-actions {
      display: flex;
      gap: 18px;
      justify-content: center;
      align-items: center;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-actions .btn {
      padding: 16px 36px;
      font-size: 17px;
    }

    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 40px;
    }

    .highlight-card {
      background: #FFFFFF;
      border: 2px solid var(--border-color);
      border-top: 4px solid var(--primary);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: left;
    }

    .highlight-card.accent-orange { border-top-color: var(--accent-orange); }
    .highlight-card.accent-cyan { border-top-color: var(--accent-cyan); }
    .highlight-card.accent-magenta { border-top-color: var(--accent-magenta); }

    .highlight-title {
      font-size: 16px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 6px;
    }

    .highlight-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 数据指标卡片 */
    .stats-section {
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      border: 2px solid var(--border-color);
    }

    .stat-item {
      text-align: center;
      padding: 10px;
      border-right: 1px dashed var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-number {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-number.orange { color: var(--accent-orange); }
    .stat-number.cyan { color: var(--accent-cyan); }
    .stat-number.magenta { color: var(--accent-magenta); }

    .stat-label {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
    }

    .stat-sub {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 卡片网格及内容组件 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .card {
      background: var(--bg-surface);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .card-icon-title {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 20px;
      color: #FFF;
      flex-shrink: 0;
    }

    .card-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-dark);
    }

    .card-body {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 10px;
    }

    .tag-item {
      font-size: 12px;
      padding: 3px 8px;
      background: var(--bg-subtle);
      color: var(--text-dark);
      border-radius: 4px;
      font-weight: 600;
    }

    /* 案例中心 */
    .case-media-card {
      background: var(--bg-surface);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-wrap {
      width: 100%;
      height: 220px;
      background-color: var(--bg-subtle);
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case-media-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-content {
      padding: 24px;
    }

    .case-title {
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    /* 对比评测 Block */
    .evaluation-box {
      background: linear-gradient(135deg, #FFFFFF 0%, #F1F5F9 100%);
      border: 3px solid var(--primary);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      margin-bottom: 40px;
    }

    .eval-score-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: var(--primary);
      color: #FFFFFF;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
    }

    .score-big {
      font-size: 44px;
      font-weight: 900;
      color: var(--accent-yellow);
      line-height: 1;
    }

    .star-rating {
      font-size: 24px;
      color: var(--accent-yellow);
      letter-spacing: 2px;
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFF;
      border-radius: var(--radius-md);
      border: 2px solid var(--border-color);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .custom-table th {
      background: #F1F5F9;
      font-weight: 800;
      font-size: 16px;
      color: var(--text-dark);
    }

    .custom-table tr:hover {
      background: rgba(79, 70, 229, 0.02);
    }

    .highlight-cell {
      font-weight: 800;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.04);
    }

    /* 流程步骤 Timeline */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #FFF;
      border: 2px solid var(--border-color);
      border-top: 4px solid var(--accent-cyan);
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--accent-cyan);
      color: #FFF;
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    /* 评论卡片 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #FFF;
      border: 2px solid var(--border-color);
      border-left: 5px solid var(--accent-orange);
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-magenta));
      color: #FFF;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .reviewer-name {
      font-weight: 800;
      font-size: 16px;
    }

    .reviewer-role {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #FFF;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 800;
      font-size: 17px;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFF;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background: var(--bg-page);
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-question {
      color: var(--primary);
      border-bottom: 1px solid var(--border-color);
    }

    .faq-toggle-icon {
      font-weight: 900;
      font-size: 20px;
      color: var(--primary);
    }

    /* 文章列表 */
    .article-section-box {
      background: #FFF;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
    }

    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .article-link-card {
      display: block;
      padding: 16px 20px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-dark);
      font-weight: 700;
      transition: all 0.2s ease;
    }

    .article-link-card:hover {
      border-color: var(--primary);
      background: rgba(79, 70, 229, 0.05);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 联系表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #FFF;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-weight: 700;
      margin-bottom: 8px;
      font-size: 14px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 14px 16px;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 15px;
      outline: none;
      transition: border-color 0.2s ease;
      background: var(--bg-page);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      background: #FFF;
    }

    .contact-info-panel {
      background: linear-gradient(135deg, #1E293B, #0F172A);
      color: #FFF;
      padding: 36px;
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-list {
      list-style: none;
      margin: 20px 0;
    }

    .contact-info-list li {
      margin-bottom: 16px;
      font-size: 15px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .qr-container {
      background: #FFF;
      padding: 16px;
      border-radius: var(--radius-sm);
      display: inline-block;
      text-align: center;
      margin-top: 15px;
    }

    .qr-container img {
      width: 130px;
      height: 130px;
      object-fit: contain;
    }

    .qr-label {
      color: var(--text-dark);
      font-size: 12px;
      font-weight: 800;
      margin-top: 6px;
    }

    /* 加盟代理模块 */
    .agency-banner {
      background: linear-gradient(135deg, var(--accent-orange), var(--accent-magenta));
      color: #FFF;
      border-radius: var(--radius-lg);
      padding: 50px;
      text-align: center;
      box-shadow: var(--shadow-lg);
    }

    .agency-title {
      font-size: 36px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    /* 友情链接与 Footer */
    .links-block {
      padding: 30px 0;
      background: #FFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .links-title {
      font-size: 15px;
      font-weight: 800;
      margin-bottom: 14px;
      color: var(--text-dark);
    }

    .links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 14px 24px;
    }

    .links-grid a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      transition: color 0.2s ease;
    }

    .links-grid a:hover {
      color: var(--primary);
    }

    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 50px 0 30px 0;
      font-size: 14px;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 30px;
      border-bottom: 1px solid #1E293B;
    }

    .footer-brand {
      color: #FFF;
      font-size: 20px;
      font-weight: 800;
    }

    .footer-copy {
      text-align: center;
      padding-top: 24px;
      color: #64748B;
      font-size: 13px;
    }

    /* 悬浮工具 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      background: var(--primary);
      color: #FFF;
      border-radius: 50px;
      padding: 12px 22px;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      font-weight: 800;
      transition: transform 0.25s ease;
    }

    .float-kefu:hover {
      transform: scale(1.06);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px dashed var(--border-color);
        padding-bottom: 16px;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 34px;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #FFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 16px;
      }
      .eval-score-bar {
        flex-direction: column;
        text-align: center;
      }
    }