/* 全局变量 - 彩虹多彩风格 (Rainbow Theme) */
    :root {
      --primary-grad: linear-gradient(135deg, #FF4B4B 0%, #FF8533 25%, #FFD000 50%, #2ED573 75%, #1E90FF 100%);
      --primary-color: #4A00E0;
      --secondary-color: #8E2DE2;
      --accent-rainbow: linear-gradient(90deg, #ff7e5f, #feb47b, #76b852, #8dc26f, #00c6ff, #0072ff);
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
      --shadow-rainbow: 0 8px 30px rgba(142, 45, 226, 0.15);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* 统一页面容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 彩虹渐变线 */
    .rainbow-line {
      height: 4px;
      width: 100%;
      background: var(--accent-rainbow);
      background-size: 200% 200%;
      animation: rainbowMove 5s ease infinite;
    }

    @keyframes rainbowMove {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    /* 顶部导航 */
    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);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, #8E2DE2, #FF416C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格满足 CSS .nav-links gap 为 0 */
      list-style: none;
    }

    .nav-links li a {
      padding: 8px 14px;
      text-decoration: none;
      color: var(--text-dark);
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(142, 45, 226, 0.06);
      border-radius: var(--radius-sm);
    }

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

    .btn-gradient {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 50px;
      background: linear-gradient(90deg, #FF416C, #8E2DE2);
      color: #FFFFFF !important;
      font-weight: 600;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(255, 65, 108, 0.3);
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(142, 45, 226, 0.4);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 22px;
      border-radius: 50px;
      border: 2px solid #8E2DE2;
      color: #8E2DE2;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      background: transparent;
      cursor: pointer;
    }

    .btn-outline:hover {
      background: #8E2DE2;
      color: #FFFFFF;
    }

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

    /* 模块基础样式 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 750px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
      background: rgba(142, 45, 226, 0.1);
      color: #8E2DE2;
      border: 1px solid rgba(142, 45, 226, 0.2);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 1. 首页 HERO 区域 (无图片) */
    .hero-section {
      padding: 100px 0 80px 0;
      background: radial-gradient(circle at 50% 20%, rgba(255, 110, 196, 0.1), rgba(120, 115, 245, 0.08) 50%, rgba(248, 250, 252, 1) 80%);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      border-radius: 30px;
      font-size: 0.9rem;
      color: #8E2DE2;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-badge span {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #2ED573;
      display: inline-block;
      box-shadow: 0 0 8px #2ED573;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-dark);
      max-width: 900px;
      margin: 0 auto 24px auto;
    }

    .hero-title .highlight {
      background: linear-gradient(135deg, #FF416C 0%, #8E2DE2 50%, #00C6FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      padding: 14px 36px;
      font-size: 1.1rem;
    }

    /* 纯 CSS 视觉装饰（无图片） */
    .hero-feature-tags {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      margin-top: 40px;
    }

    .feature-tag-item {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: 12px;
      font-size: 0.9rem;
      color: var(--text-dark);
      font-weight: 500;
      box-shadow: var(--shadow-sm);
    }

    /* 2. 数据指标卡片 (数据统计) */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stat-card {
      background: var(--bg-card);
      padding: 28px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-rainbow);
      border-color: rgba(142, 45, 226, 0.3);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 900;
      background: linear-gradient(135deg, #8E2DE2, #FF416C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 3. 关于我们与平台介绍 */
    .about-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.6rem;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 20px;
      font-size: 1rem;
    }

    .about-features-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .about-features-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
    }

    .about-features-list li::before {
      content: "✓";
      color: #2ED573;
      font-weight: bold;
    }

    .about-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .about-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .about-img-wrap img:hover {
      transform: scale(1.02);
    }

    /* 4. AIGC服务 / 场景卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: #8E2DE2;
    }

    .service-icon-box {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(255, 65, 108, 0.1), rgba(142, 45, 226, 0.1));
      color: #8E2DE2;
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-dark);
    }

    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* 5. 一站式制作 & 行业方案 */
    .solutions-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }

    .tab-btn {
      padding: 10px 24px;
      border-radius: 30px;
      border: 1px solid var(--border-color);
      background: #FFFFFF;
      color: var(--text-dark);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }

    .tab-btn.active, .tab-btn:hover {
      background: linear-gradient(90deg, #8E2DE2, #4A00E0);
      color: #FFFFFF;
      border-color: transparent;
    }

    /* 6. 服务网络与模型矩阵 */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .model-chip {
      padding: 8px 16px;
      background: var(--bg-light);
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-dark);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: linear-gradient(135deg, #FF416C, #8E2DE2);
      color: #FFFFFF;
      border-color: transparent;
      transform: scale(1.05);
    }

    /* 7. 标准流程 (Steps) */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(142, 45, 226, 0.15);
      position: absolute;
      top: 16px;
      right: 20px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 8. 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .case-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }

    .case-body {
      padding: 20px;
    }

    .case-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 9. 对比评测 (严格满足评测要求) */
    .review-score-box {
      background: linear-gradient(135deg, #1E1B4B 0%, #31103F 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

    .score-left h3 {
      font-size: 1.8rem;
      margin-bottom: 6px;
    }

    .score-left p {
      color: #CBD5E1;
      font-size: 0.95rem;
    }

    .score-right {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .star-badge {
      text-align: right;
    }

    .star-title {
      font-size: 0.9rem;
      color: #94A3B8;
    }

    .stars {
      color: #FFD700;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .score-num-box {
      background: rgba(255, 255, 255, 0.1);
      padding: 12px 24px;
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .score-val {
      font-size: 2.6rem;
      font-weight: 900;
      color: #00FFCC;
      line-height: 1;
    }

    .score-max {
      font-size: 0.85rem;
      color: #94A3B8;
    }

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

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

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

    .compare-table th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-dark);
    }

    .compare-table td.highlight {
      background: rgba(142, 45, 226, 0.04);
      font-weight: 700;
      color: #8E2DE2;
    }

    /* 10. 需求匹配 & 11. Token比价 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .price-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .price-card.popular {
      border: 2px solid #8E2DE2;
      box-shadow: var(--shadow-rainbow);
    }

    .price-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(90deg, #FF416C, #8E2DE2);
      color: #FFFFFF;
      padding: 2px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
    }

    .price-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-dark);
      margin: 16px 0;
    }

    .price-val span {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .price-features {
      list-style: none;
      margin-bottom: 24px;
      text-align: left;
    }

    .price-features li {
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 12. 帮助中心 & 13. 常见问题 (FAQ) */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: #8E2DE2;
      transition: var(--transition);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #F8FAFC;
      color: var(--text-muted);
      font-size: 0.95rem;
      padding: 0 24px;
    }

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

    /* 14. 用户评论 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #8E2DE2, #FF416C);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .user-info .user-name {
      font-weight: 700;
      font-size: 0.95rem;
    }

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

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 15. AI百科与行业资讯 */
    .news-articles-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
    }

    .articles-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .articles-links-list a {
      color: #8E2DE2;
      text-decoration: none;
      background: rgba(142, 45, 226, 0.08);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .articles-links-list a:hover {
      background: #8E2DE2;
      color: #FFFFFF;
    }

    /* 16. 联系我们 & 表单接入 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .contact-info h3 {
      font-size: 1.6rem;
      margin-bottom: 20px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-item strong {
      color: var(--text-dark);
      min-width: 80px;
    }

    .qr-container {
      margin-top: 20px;
    }

    .qr-container img {
      width: 140px;
      height: 140px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: #8E2DE2;
      box-shadow: 0 0 0 3px rgba(142, 45, 226, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 17. 加盟代理 banner */
    .agency-banner {
      background: linear-gradient(135deg, #4A00E0 0%, #8E2DE2 50%, #FF416C 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 50px;
      text-align: center;
      box-shadow: var(--shadow-rainbow);
    }

    .agency-banner h2 {
      font-size: 2.2rem;
      margin-bottom: 16px;
    }

    .agency-banner p {
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto 30px auto;
      opacity: 0.9;
    }

    /* 页脚 Footer */
    footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links li a {
      color: #94A3B8;
      text-decoration: none;
      transition: var(--transition);
      font-size: 0.9rem;
    }

    .footer-links li a:hover {
      color: #FFFFFF;
    }

    .friendly-links-container {
      border-top: 1px solid #1E293B;
      padding-top: 20px;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      font-size: 0.85rem;
    }

    .friendly-links-container a {
      color: #94A3B8;
      text-decoration: none;
      margin-right: 10px;
    }

    .friendly-links-container a:hover {
      color: #00FFCC;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 悬浮客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: linear-gradient(135deg, #FF416C, #8E2DE2);
      color: #FFFFFF;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 25px rgba(142, 45, 226, 0.4);
      cursor: pointer;
      text-decoration: none;
      font-size: 1.4rem;
      transition: var(--transition);
    }

    .float-kefu:hover {
      transform: scale(1.1);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .about-box, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .review-score-box {
        flex-direction: column;
        text-align: center;
      }
      .score-right {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }