/* 全局重置与基础样式 */
    :root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --secondary: #06b6d4;
      --accent: #7c3aed;
      --accent-light: #f3e8ff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-main: #ffffff;
      --bg-muted: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --gradient-primary: linear-gradient(135deg, #2563eb, #06b6d4);
      --gradient-accent: linear-gradient(135deg, #7c3aed, #06b6d4);
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --radius: 12px;
    }

    * {
      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;
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    ul {
      list-style: none;
    }

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

    /* 公共容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-header h2 {
      font-size: 2.24rem;
      color: var(--text-main);
      margin-bottom: 15px;
      font-weight: 800;
      letter-spacing: -0.025em;
    }

    .section-header p {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 9999px;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--gradient-primary);
      color: #fff !important;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    }

    .btn-secondary {
      background-color: var(--bg-muted);
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }

    .btn-secondary:hover {
      background-color: var(--border-color);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: var(--gradient-accent);
      color: #fff !important;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    /* 顶部导航 */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-area img {
      height: 40px;
      width: auto;
    }

    .logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-menu {
      display: flex;
      gap: 20px;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 5px 10px;
      border-radius: 6px;
    }

    .nav-link:hover {
      color: var(--primary);
      background-color: var(--bg-muted);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .menu-toggle span {
      width: 25px;
      height: 3px;
      background-color: var(--text-main);
      border-radius: 3px;
      transition: 0.3s;
    }

    /* 首屏 Hero (无图片) */
    .hero {
      padding-top: 150px;
      padding-bottom: 100px;
      background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
                  var(--bg-main);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: var(--accent-light);
      color: var(--accent);
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 25px;
      border: 1px solid rgba(124, 58, 237, 0.2);
    }

    .hero h1 {
      font-size: 3.5rem;
      line-height: 1.2;
      font-weight: 850;
      letter-spacing: -0.03em;
      margin-bottom: 25px;
      background: linear-gradient(135deg, #0f172a 30%, #2563eb 70%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 40px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 15px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    /* 数据指标卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .stat-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 25px 20px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .stat-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 5px;
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    /* 平台介绍 & 关于我们 */
    .about-section {
      background-color: var(--bg-muted);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.8rem;
      font-weight: 750;
      margin-bottom: 20px;
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 20px;
      font-size: 1.05rem;
    }

    .about-features {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 20px;
    }

    .about-feature-box {
      background-color: var(--bg-card);
      padding: 25px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }

    .about-feature-box h4 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--primary);
    }

    .about-feature-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .square-media-box {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .square-media-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 全平台 AIGC 服务 */
    .services-section {
      background-color: var(--bg-main);
    }

    .model-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      max-width: 1000px;
      margin: 30px auto 0;
    }

    .model-tag {
      background-color: var(--bg-muted);
      color: var(--text-main);
      padding: 8px 18px;
      border-radius: 9999px;
      font-size: 0.9rem;
      font-weight: 550;
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      background: var(--gradient-primary);
      color: #fff;
      border-color: transparent;
      transform: scale(1.05);
    }

    /* 一站式 AIGC 制作场景 */
    .制作-section {
      background-color: var(--bg-muted);
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .scene-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 35px 25px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .scene-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--gradient-primary);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .scene-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .scene-card:hover::before {
      opacity: 1;
    }

    .scene-icon {
      width: 50px;
      height: 50px;
      background-color: var(--accent-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--accent);
      font-size: 1.5rem;
      font-weight: bold;
    }

    .scene-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .scene-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 全行业解决方案 & 服务网络 */
    .solution-section {
      background-color: var(--bg-main);
    }

    .network-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin-top: 50px;
      align-items: center;
    }

    .network-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .network-item {
      background-color: var(--bg-muted);
      padding: 20px;
      border-radius: var(--radius);
      border-left: 4px solid var(--secondary);
    }

    .network-item h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    /* 流程与技术标准 */
    .flow-section {
      background-color: var(--bg-muted);
    }

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

    .step-box {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      background: var(--gradient-primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 20px;
    }

    .step-box h4 {
      margin-bottom: 10px;
      font-size: 1.1rem;
    }

    .step-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 案例展示区 */
    .cases-section {
      background-color: var(--bg-main);
    }

    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

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

    .case-img-container {
      position: relative;
      background-color: #f1f5f9;
      aspect-ratio: 16/9;
      overflow: hidden;
    }

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

    .case-badge {
      position: absolute;
      top: 15px;
      left: 15px;
      background-color: rgba(15, 23, 42, 0.8);
      color: #fff;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 600;
    }

    .case-body {
      padding: 25px;
    }

    .case-body h4 {
      font-size: 1.2rem;
      margin-bottom: 10px;
    }

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

    /* 对比评测 & Token比价 */
    .compare-section {
      background-color: var(--bg-muted);
    }

    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .compare-table-wrapper {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background-color: #fef08a;
      color: #854d0e;
      padding: 8px 16px;
      border-radius: 8px;
      font-weight: bold;
      margin-bottom: 20px;
    }

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

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

    .compare-table th, .compare-table td {
      padding: 12px 15px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .compare-table th {
      font-weight: 700;
      color: var(--text-main);
      background-color: var(--bg-muted);
    }

    .compare-table td strong {
      color: var(--primary);
    }

    /* 职业培训 & 人工智能培训 */
    .train-section {
      background-color: var(--bg-main);
    }

    .train-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 15px;
    }

    .train-card {
      background-color: var(--bg-muted);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 25px 15px;
      text-align: center;
      transition: all 0.3s ease;
    }

    .train-card:hover {
      background-color: var(--bg-card);
      border-color: var(--accent);
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .train-card h4 {
      font-size: 1.05rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    /* 客户评论卡片 (6条) */
    .review-section {
      background-color: var(--bg-muted);
    }

    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .review-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .review-stars {
      color: #fbbf24;
      margin-bottom: 15px;
      font-size: 1.1rem;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }

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

    /* 资讯中心 */
    .news-section {
      background-color: var(--bg-main);
    }

    .news-container {
      background-color: var(--bg-muted);
      border-radius: var(--radius);
      padding: 40px;
      border: 1px solid var(--border-color);
    }

    .news-placeholder {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 25px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .news-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .news-item {
      background-color: var(--bg-card);
      padding: 20px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: border-color 0.3s;
    }

    .news-item:hover {
      border-color: var(--primary);
    }

    .news-title {
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .news-link {
      font-size: 0.85rem;
      color: var(--primary);
      align-self: flex-start;
      margin-top: 10px;
      font-weight: bold;
    }

    /* 自助排查与术语百科 */
    .toolbox-section {
      background-color: var(--bg-muted);
    }

    .toolbox-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }

    .troubleshoot-box, .wiki-box {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 35px;
    }

    .toolbox-grid h3 {
      font-size: 1.5rem;
      margin-bottom: 20px;
      font-weight: 750;
    }

    .troubleshoot-steps {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .ts-step {
      display: flex;
      gap: 15px;
    }

    .ts-num {
      width: 28px;
      height: 28px;
      background-color: var(--secondary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
      flex-shrink: 0;
    }

    .ts-desc h5 {
      font-size: 0.95rem;
      margin-bottom: 4px;
    }

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

    .wiki-terms {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
    }

    .wiki-item {
      background-color: var(--bg-muted);
      padding: 15px;
      border-radius: 8px;
    }

    .wiki-item strong {
      display: block;
      margin-bottom: 5px;
      color: var(--primary);
      font-size: 0.9rem;
    }

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

    /* 常见问题 FAQ 折叠面板 (不少于10条) */
    .faq-section {
      background-color: var(--bg-main);
    }

    .faq-wrapper {
      max-width: 850px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      background-color: var(--bg-card);
      transition: all 0.3s;
    }

    .faq-question {
      padding: 18px 24px;
      background-color: var(--bg-card);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1rem;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.25rem;
      color: var(--text-muted);
      transition: transform 0.3s;
    }

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

    .faq-item.active .faq-question::after {
      content: '-';
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: var(--bg-muted);
    }

    .faq-answer-content {
      padding: 20px 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      border-top: 1px solid var(--border-color);
    }

    /* 智能需求匹配与联系我们 */
    .contact-section {
      background-color: var(--bg-muted);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 50px;
      align-items: start;
    }

    .form-wrapper {
      background-color: var(--bg-card);
      padding: 40px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
    }

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

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      transition: border-color 0.3s;
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    .contact-info-panel {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-details {
      display: flex;
      flex-direction: column;
      gap: 25px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .contact-icon {
      font-size: 1.5rem;
      color: var(--primary);
      width: 24px;
      text-align: center;
    }

    .contact-text h5 {
      font-size: 1rem;
      margin-bottom: 4px;
    }

    .contact-text p, .contact-text a {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      margin-top: 30px;
      padding-top: 30px;
      border-top: 1px solid var(--border-color);
    }

    .qr-code {
      width: 100px;
      height: 100px;
      background-color: #f1f5f9;
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    .qr-code img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .qr-text p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }

    .qr-text strong {
      font-size: 0.95rem;
      color: var(--text-main);
    }

    /* 加盟代理模块 */
    .partner-section {
      background: var(--gradient-accent);
      color: #fff;
      text-align: center;
      padding: 60px 0;
    }

    .partner-section h3 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 15px;
    }

    .partner-section p {
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto 30px;
      opacity: 0.9;
    }

    /* 页脚 */
    footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 5px solid var(--primary);
    }

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

    .footer-brand img {
      height: 40px;
      margin-bottom: 15px;
      
    }

    .footer-brand p {
      margin-bottom: 15px;
      font-size: 0.85rem;
    }

    .footer-links h5 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    .footer-bottom p {
      font-size: 0.8rem;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.8rem;
    }

    .friend-links a {
      color: #64748b;
    }

    .friend-links a:hover {
      color: #fff;
    }

    /* 浮动客服入口 */
    .float-kefu {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-item {
      width: 50px;
      height: 50px;
      background-color: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      transition: all 0.3s;
      position: relative;
    }

    .float-item:hover {
      transform: scale(1.1);
      background-color: var(--primary-hover);
    }

    .float-item span {
      font-size: 1.25rem;
    }

    .float-item .popover {
      position: absolute;
      right: 65px;
      bottom: 0;
      width: 180px;
      background-color: #fff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 15px;
      box-shadow: var(--shadow-lg);
      display: none;
      color: var(--text-main);
      text-align: center;
    }

    .float-item .popover img {
      width: 120px;
      height: 120px;
      margin: 0 auto 10px;
    }

    .float-item:hover .popover {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid, .cases-grid, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .train-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .section-header h2 {
        font-size: 1.8rem;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
      .about-grid, .network-grid, .compare-grid, .toolbox-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .train-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scene-grid, .cases-grid, .review-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .news-list {
        grid-template-columns: 1fr;
      }
    }