:root {
      --primary: #F59E0B;
      --primary-dark: #D97706;
      --primary-light: #FEF3C7;
      --accent: #B45309;
      --dark: #1F2937;
      --darker: #111827;
      --text: #374151;
      --text-muted: #6B7280;
      --light-bg: #FFFBEB;
      --bg-white: #FFFFFF;
      --card-bg: #FFFFFF;
      --border: #FDE68A;
      --border-subtle: #F3F4F6;
      --shadow-sm: 0 2px 4px rgba(217, 119, 6, 0.05);
      --shadow-md: 0 6px 16px rgba(217, 119, 6, 0.08);
      --shadow-lg: 0 12px 32px rgba(217, 119, 6, 0.12);
      --radius: 12px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--light-bg);
      color: var(--text);
      line-height: 1.65;
      overflow-x: hidden;
      min-width: 320px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-area .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--dark);
      border-radius: 6px;
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-dark);
      background-color: var(--primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-weight: 700;
      font-size: 0.95rem;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      line-height: 1.2;
    }

    .btn-primary {
      background: linear-gradient(135deg, #FBBF24, #F59E0B);
      color: var(--darker);
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #F59E0B, #D97706);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(217, 119, 6, 0.4);
      color: #000;
    }

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

    .btn-outline:hover {
      background-color: var(--primary-light);
      border-color: var(--primary-dark);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--darker);
      padding: 6px;
    }

    /* 模块通用标题 */
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      background-color: var(--primary-light);
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid var(--border);
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--darker);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }

    section {
      padding: 72px 0;
    }

    /* 首屏 Hero 无图片纯设计 */
    .hero-section {
      padding: 80px 0 64px;
      background: radial-gradient(circle at 50% 20%, #FFFBEB 0%, #FEF3C7 60%, #FDE68A 100%);
      border-bottom: 2px solid var(--border);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: 24px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--darker);
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #D97706 0%, #B45309 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: #4B5563;
      margin-bottom: 36px;
      line-height: 1.7;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-actions .btn {
      min-width: 170px;
      padding: 14px 28px;
      font-size: 1.05rem;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }

    .stat-card {
      background-color: rgba(255, 255, 255, 0.9);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      background-color: #FFFFFF;
    }

    .stat-number {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

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

    /* 平台介绍 */
    .about-box {
      background-color: var(--card-bg);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }

    .about-item {
      padding: 24px;
      background-color: var(--light-bg);
      border-radius: 8px;
      border-left: 4px solid var(--primary);
    }

    .about-item h3 {
      font-size: 1.15rem;
      color: var(--darker);
      margin-bottom: 8px;
    }

    .about-item p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 服务能力卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background-color: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--accent);
      font-size: 1.4rem;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 1.25rem;
      color: var(--darker);
      margin-bottom: 10px;
    }

    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-item {
      font-size: 0.78rem;
      background-color: var(--light-bg);
      color: var(--accent);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border);
    }

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

    .step-card {
      background-color: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 20px;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: var(--darker);
      border-radius: 50%;
      text-align: center;
      line-height: 32px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .step-card h3 {
      font-size: 1.1rem;
      color: var(--darker);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比评测表格 */
    .evaluation-card {
      background-color: var(--card-bg);
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-md);
      margin-bottom: 32px;
    }

    .eval-highlight {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px dashed var(--border);
      margin-bottom: 24px;
    }

    .rating-badge {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .score {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1;
    }

    .stars {
      color: #F59E0B;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.95rem;
    }

    .compare-table th {
      background-color: var(--primary-light);
      color: var(--darker);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background-color: #FFFDF5;
    }

    .strong-highlight {
      color: var(--primary-dark);
      font-weight: 700;
    }

    /* 素材图片图文混排 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .media-thumb-wrap {
      width: 100%;
      background-color: #F3F4F6;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .media-thumb-wrap.square {
      aspect-ratio: 1 / 1;
      max-height: 380px;
    }

    .media-thumb-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

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

    .media-body {
      padding: 20px;
    }

    .media-body h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--darker);
    }

    .media-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 宣传图画廊 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 32px;
    }

    .banner-item {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border);
      aspect-ratio: 4 / 3;
    }

    .banner-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 客户评价板块 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .review-text {
      font-size: 0.95rem;
      color: #4B5563;
      margin-bottom: 18px;
      line-height: 1.6;
    }

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

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .author-info h4 {
      font-size: 0.95rem;
      color: var(--darker);
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 常见问题折叠面板 */
    .faq-list {
      max-width: 920px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background-color: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--darker);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary-dark);
    }

    .faq-answer {
      padding: 0 22px 18px 22px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.65;
      display: none;
      border-top: 1px solid var(--border-subtle);
      margin-top: 4px;
      padding-top: 14px;
    }

    .faq-item.active {
      border-color: var(--primary);
    }

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

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

    /* 需求匹配与联系我们表单 */
    .form-section-box {
      background-color: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }

    .form-info h3 {
      font-size: 1.5rem;
      color: var(--darker);
      margin-bottom: 14px;
    }

    .contact-ways {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .qr-container {
      margin-top: 24px;
      padding: 16px;
      background: var(--light-bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      display: inline-block;
      text-align: center;
    }

    .qr-container img {
      max-width: 140px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
      border-radius: 4px;
    }

    .form-fields {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #D1D5DB;
      border-radius: 6px;
      font-size: 0.95rem;
      color: var(--text);
      outline: none;
      transition: var(--transition);
      background-color: #FFFFFF;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
    }

    /* 资讯与链接 */
    .article-links-box {
      background-color: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 30px;
      margin-bottom: 30px;
    }

    .article-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      list-style: none;
    }

    .article-item a {
      display: inline-block;
      padding: 8px 16px;
      background: var(--light-bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--dark);
    }

    .article-item a:hover {
      background-color: var(--primary-light);
      color: var(--primary-dark);
      border-color: var(--primary);
    }

    /* 页脚 */
    footer.site-footer {
      background-color: #FFFFFF;
      border-top: 2px solid var(--border);
      padding: 48px 0 28px;
      color: var(--text);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      font-size: 1rem;
      color: var(--darker);
      margin-bottom: 16px;
      font-weight: 700;
    }

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

    .footer-links a {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

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

    .friend-links-wrap {
      border-top: 1px solid var(--border-subtle);
      padding-top: 20px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--darker);
      margin-bottom: 10px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-list a {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 悬浮客服面板 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: #FFFFFF;
      border: 2px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      color: var(--primary-dark);
      font-size: 1.2rem;
      position: relative;
      transition: var(--transition);
    }

    .float-btn:hover {
      background-color: var(--primary);
      color: var(--darker);
      transform: scale(1.08);
    }

    .float-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 16px;
      width: 180px;
      box-shadow: var(--shadow-lg);
      display: none;
      text-align: center;
    }

    .float-popup img {
      width: 120px;
      height: 120px;
      margin-bottom: 6px;
    }

    .float-btn:hover .float-popup {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .service-grid,
      .about-grid,
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: #FFFFFF;
        flex-direction: column;
        border-bottom: 1px solid var(--border);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .service-grid,
      .about-grid,
      .testimonial-grid,
      .media-gallery-grid,
      .flow-steps,
      .banner-gallery {
        grid-template-columns: 1fr;
      }
      .form-section-box {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }