:root {
      --primary: #FFB800;
      --primary-hover: #E5A600;
      --primary-light: #FFF9E6;
      --accent: #FF8800;
      --dark: #121826;
      --text-main: #2D3748;
      --text-muted: #64748B;
      --bg-page: #FAF9F6;
      --bg-card: #FFFFFF;
      --border-color: #F0E6D2;
      --shadow-sm: 0 4px 12px rgba(255, 184, 0, 0.08);
      --shadow-md: 0 8px 24px rgba(18, 24, 38, 0.06);
      --shadow-lg: 0 16px 36px rgba(255, 184, 0, 0.14);
      --radius: 12px;
      --max-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--primary);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--dark);
    }

    .brand-logo .ai-page-logo {
      max-height: 44px;
      width: auto;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li {
      margin: 0 10px;
    }

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--dark);
      padding: 6px 10px;
      border-radius: 6px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 30px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #FFCC00 0%, #FF9900 100%);
      color: #000;
      box-shadow: 0 4px 14px rgba(255, 184, 0, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 184, 0, 0.45);
    }

    .btn-dark {
      background-color: var(--dark);
      color: #FFF;
    }

    .btn-dark:hover {
      background-color: #2D3748;
      transform: translateY(-2px);
    }

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

    .btn-outline:hover {
      background: var(--dark);
      color: #FFF;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--dark);
    }

    /* 区域通用规范 */
    .section {
      padding: 60px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 40px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: #B26A00;
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid #FFE082;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #FFF4CC 0%, #FAF9F6 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFF;
      border: 2px solid var(--primary);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: #00C853;
      border-radius: 50%;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-highlight {
      background: linear-gradient(135deg, #E68A00, #D97706);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: #4A5568;
      max-width: 860px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-value {
      font-size: 2rem;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .stat-value em {
      font-style: normal;
      font-size: 1.1rem;
      color: var(--accent);
      margin-left: 2px;
    }

    .stat-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

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

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
      transform: translateY(-4px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: var(--accent);
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 标签云与聚合模型 */
    .tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .tag-item {
      padding: 8px 16px;
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s;
    }

    .tag-item:hover {
      background: var(--primary);
      color: #000;
      border-color: var(--primary);
    }

    /* 对比评测表格 */
    .review-highlight-box {
      background: linear-gradient(135deg, #FFFDF0, #FFF7D1);
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 24px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

    .review-score-wrap {
      text-align: center;
    }

    .review-score-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .review-stars {
      color: #FF9900;
      font-size: 1.5rem;
      letter-spacing: 2px;
    }

    .review-score-num {
      font-size: 2.8rem;
      font-weight: 900;
      color: #D97706;
      line-height: 1;
    }

    .review-score-total {
      font-size: 1.1rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .table-container {
      overflow-x: auto;
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .custom-table th {
      background: #FFF9E6;
      color: var(--dark);
      font-weight: 700;
    }

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

    .custom-table .col-highlight {
      background: #FFFAF0;
      font-weight: 700;
      color: #B26A00;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-card {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .flow-number {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #000;
      font-weight: 900;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    /* 真实素材图画廊 */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .media-card {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .media-card:hover .ai-page-image {
      transform: scale(1.03);
    }

    .media-content {
      padding: 16px;
    }

    .media-content h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .media-content p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .user-comment-card {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .user-comment-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar-badge {
      width: 44px;
      height: 44px;
      background: #FFF4CC;
      color: #B26A00;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
    }

    .user-meta h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .user-comment-text {
      font-size: 0.95rem;
      color: #4A5568;
      line-height: 1.6;
    }

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

    .faq-item {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #FFF;
    }

    .faq-question:hover {
      background-color: var(--primary-light);
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      transition: transform 0.25s ease;
      color: var(--accent);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      background: #FAFAFA;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* 表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-panel h3 {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-list li {
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-main);
    }

    .qr-box {
      margin-top: 20px;
      text-align: center;
      width: 140px;
      padding: 10px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #FAFAFA;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }

    .qr-box p {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 6px;
      font-weight: 600;
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      background: #FFFDF8;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFF;
      box-shadow: 0 0 0 3px rgba(255, 184, 0, 0.15);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 资讯与友情链接 */
    .article-links-box, .friend-links-box {
      background: #FFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-top: 20px;
      box-shadow: var(--shadow-sm);
    }

    .links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .links-flex a {
      padding: 6px 14px;
      background: #FFFDF5;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--dark);
      font-weight: 600;
    }

    .links-flex a:hover {
      background: var(--primary);
      color: #000;
    }

    /* 页脚 */
    .site-footer {
      background: #181E29;
      color: #E2E8F0;
      padding: 50px 0 30px;
      border-top: 4px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-list a {
      color: #94A3B8;
      font-size: 0.9rem;
    }

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

    .footer-bottom {
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    /* 悬浮客服面板 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 50px;
      height: 50px;
      background: var(--primary);
      color: #000;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 900;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      border: 2px solid #FFF;
      transition: all 0.25s ease;
    }

    .floating-btn:hover {
      transform: scale(1.08);
      background: #FFAE00;
    }

    .kefu-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFF;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      display: none;
      width: 170px;
      text-align: center;
    }

    .kefu-popup.show {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-4, .hero-stats-grid, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .review-grid, .media-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFF;
        padding: 20px;
        border-bottom: 2px solid var(--primary);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
        margin: 6px 0;
      }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .flow-steps, .review-grid, .media-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
    }