/* CSS 变量与重置 */
    :root {
      --bg-primary: #f8fafc;
      --bg-secondary: #ffffff;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --color-accent-blue: #0284c7;
      --color-accent-orange: #f97316;
      --color-accent-cyan: #06b6d4;
      --color-dark-indigo: #1e1b4b;
      --max-width: 1200px;
      --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, sans-serif;
    }

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

    /* 通用版芯容器 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    section {
      padding: 80px 0;
      border-bottom: 1px solid #e2e8f0;
    }

    /* 标题样式 */
    .section-title {
      font-size: 2.2rem;
      color: var(--color-dark-indigo);
      text-align: center;
      margin-bottom: 12px;
      font-weight: 800;
    }

    .section-subtitle {
      text-align: center;
      color: var(--text-muted);
      margin-bottom: 48px;
      font-size: 1.1rem;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* 按钮基础 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
    }

    .btn-orange {
      background-color: var(--color-accent-orange);
      color: #ffffff;
      border: 2px solid var(--color-accent-orange);
    }

    .btn-orange:hover {
      background-color: #ea580c;
      border-color: #ea580c;
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      color: var(--color-dark-indigo);
      border: 2px solid var(--color-dark-indigo);
    }

    .btn-outline:hover {
      background-color: var(--color-dark-indigo);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 导航栏 */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      border-bottom: 1px solid #e2e8f0;
      backdrop-filter: blur(10px);
    }

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

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

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

    .nav-links {
      display: flex;
      gap: 20px;
      list-style: none;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .nav-links a:hover {
      color: var(--color-accent-orange);
    }

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

    /* 首屏 Hero 区域 (无图片) */
    .hero-section {
      background: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 100px 0 120px;
      text-align: center;
      position: relative;
      border-bottom: none;
    }

    .hero-badge {
      display: inline-block;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: var(--color-accent-cyan);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.9rem;
      margin-bottom: 24px;
      letter-spacing: 1px;
    }

    .hero-title {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 900;
      max-width: 900px;
      margin: 0 auto 24px;
      background: linear-gradient(to right, #ffffff, #93c5fd, #22d3ee);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.25rem;
      color: #cbd5e1;
      max-width: 750px;
      margin: 0 auto 40px;
    }

    .hero-btn-group {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .hero-btn-group .btn-outline {
      color: #ffffff;
      border-color: #ffffff;
    }

    .hero-btn-group .btn-outline:hover {
      background-color: #ffffff;
      color: var(--color-dark-indigo);
    }

    /* 数据指标卡片 */
    .stats-section {
      padding: 40px 0;
      background-color: var(--bg-secondary);
      margin-top: -50px;
      position: relative;
      z-index: 10;
      border-radius: 16px;
      box-shadow: 0 15px 30px rgba(0,0,0,0.05);
      border: 1px solid #e2e8f0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 32px;
      text-align: center;
    }

    .stat-item h3 {
      font-size: 2.5rem;
      color: var(--color-accent-orange);
      font-weight: 800;
      margin-bottom: 8px;
    }

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

    /* 关于我们 & 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.8rem;
      color: var(--color-dark-indigo);
      margin-bottom: 20px;
      font-weight: 700;
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 1rem;
    }

    .about-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .about-tag {
      background-color: #f1f5f9;
      color: var(--color-dark-indigo);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
    }

    .about-features {
      background: linear-gradient(135deg, #e0f2fe 0%, #ccfbf1 100%);
      padding: 40px;
      border-radius: 16px;
      border-left: 6px solid var(--color-accent-cyan);
    }

    .feature-point {
      margin-bottom: 20px;
    }

    .feature-point:last-child {
      margin-bottom: 0;
    }

    .feature-point h4 {
      color: var(--color-dark-indigo);
      font-size: 1.1rem;
      margin-bottom: 4px;
      font-weight: 700;
    }

    .feature-point p {
      color: #475569;
      font-size: 0.9rem;
    }

    /* 全平台AIGC服务 & Token比价 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-bottom: 60px;
    }

    .service-card {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 30px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background-color: var(--color-accent-blue);
      opacity: 0;
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0,0,0,0.05);
      border-color: #cbd5e1;
    }

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

    .service-card h3 {
      font-size: 1.4rem;
      color: var(--color-dark-indigo);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .service-meta {
      font-size: 0.85rem;
      color: var(--color-accent-orange);
      font-weight: bold;
    }

    .model-tags-container {
      background-color: #f1f5f9;
      padding: 30px;
      border-radius: 16px;
    }

    .model-tags-title {
      font-size: 1.2rem;
      color: var(--color-dark-indigo);
      margin-bottom: 20px;
      text-align: center;
      font-weight: 700;
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      background-color: var(--bg-secondary);
      border: 1px solid #cbd5e1;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-tag:hover {
      background-color: var(--color-dark-indigo);
      color: #ffffff;
      border-color: var(--color-dark-indigo);
    }

    /* 一站式AIGC制作 & 流程步骤 */
    .process-container {
      margin-top: 50px;
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      position: relative;
    }

    .process-step {
      background-color: var(--bg-secondary);
      padding: 30px;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      position: relative;
      text-align: center;
    }

    .step-number {
      width: 40px;
      height: 40px;
      background-color: var(--color-accent-cyan);
      color: var(--color-dark-indigo);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 20px;
      font-size: 1.1rem;
    }

    .process-step h4 {
      font-size: 1.15rem;
      color: var(--color-dark-indigo);
      margin-bottom: 10px;
      font-weight: 700;
    }

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

    /* 全行业解决方案 & 技术标准 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .solution-card {
      background-color: var(--bg-secondary);
      border-radius: 12px;
      padding: 30px;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .solution-card:hover {
      border-color: var(--color-accent-cyan);
      box-shadow: 0 8px 20px rgba(6, 182, 212, 0.08);
    }

    .solution-card h3 {
      font-size: 1.25rem;
      color: var(--color-dark-indigo);
      margin-bottom: 12px;
      border-left: 4px solid var(--color-accent-orange);
      padding-left: 12px;
    }

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

    /* 全国服务网络 */
    .network-section {
      background-color: var(--color-dark-indigo);
      color: #ffffff;
      text-align: center;
    }

    .network-section .section-title {
      color: #ffffff;
    }

    .network-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .network-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px;
      border-radius: 12px;
    }

    .network-card h4 {
      font-size: 1.2rem;
      color: var(--color-accent-cyan);
      margin-bottom: 8px;
    }

    .network-card p {
      font-size: 0.9rem;
      color: #cbd5e1;
    }

    /* 客户案例中心 (包含图片) */
    .case-gallery {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 45px;
    }

    .case-item {
      background-color: var(--bg-secondary);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .case-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }

    .case-img-wrap {
      width: 100%;
      position: relative;
      background-color: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    /* 横版与方版素材排版 */
    .case-item.landscape .case-img-wrap {
      aspect-ratio: 16/9;
    }

    .case-item.square .case-img-wrap {
      aspect-ratio: 1/1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .case-item:hover img {
      transform: scale(1.05);
    }

    .case-info {
      padding: 24px;
    }

    .case-info h4 {
      font-size: 1.15rem;
      color: var(--color-dark-indigo);
      margin-bottom: 8px;
      font-weight: 700;
    }

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

    /* 对比评测 */
    .comparison-section {
      background-color: #f1f5f9;
    }

    .comparison-header {
      background-color: var(--bg-secondary);
      border-radius: 16px;
      padding: 30px;
      border: 1px solid #cbd5e1;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 40px;
    }

    .rating-box {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .rating-stars {
      color: var(--color-accent-orange);
      font-size: 1.5rem;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--color-dark-indigo);
    }

    .rating-score span {
      font-size: 1rem;
      color: var(--text-muted);
      font-weight: 400;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background-color: var(--bg-secondary);
      border-radius: 16px;
      border: 1px solid #e2e8f0;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 800px;
    }

    th, td {
      padding: 16px 24px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 0.95rem;
    }

    th {
      background-color: #f8fafc;
      color: var(--color-dark-indigo);
      font-weight: 700;
    }

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

    td.highlight {
      background-color: rgba(6, 182, 212, 0.05);
      font-weight: 700;
      color: var(--color-dark-indigo);
    }

    /* 培训业务 */
    .training-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .training-card {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 30px;
      text-align: center;
      transition: var(--transition);
    }

    .training-card:hover {
      box-shadow: 0 10px 25px rgba(0,0,0,0.05);
      border-color: var(--color-accent-orange);
    }

    .training-card h4 {
      font-size: 1.25rem;
      color: var(--color-dark-indigo);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .training-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    /* 常见问题 FAQ & 折叠面板 */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

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

    .accordion-item {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      overflow: hidden;
      transition: var(--transition);
    }

    .accordion-header {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1rem;
      color: var(--color-dark-indigo);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: var(--transition);
    }

    .accordion-header:hover {
      background-color: #f8fafc;
    }

    .accordion-icon {
      font-size: 1.2rem;
      transition: var(--transition);
      color: var(--color-accent-cyan);
    }

    .accordion-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease-out;
      color: var(--text-muted);
      font-size: 0.95rem;
      border-top: 0 solid #e2e8f0;
    }

    .accordion-item.active .accordion-content {
      padding: 18px 24px;
      max-height: 250px;
      border-top: 1px solid #e2e8f0;
    }

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

    /* AI术语百科 & 自助排查 */
    .glossary-card {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 30px;
    }

    .glossary-card h3 {
      font-size: 1.3rem;
      color: var(--color-dark-indigo);
      margin-bottom: 20px;
      font-weight: 700;
    }

    .glossary-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .glossary-item h5 {
      font-size: 0.95rem;
      color: var(--color-accent-orange);
      margin-bottom: 4px;
      font-weight: 700;
    }

    .glossary-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .review-card {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 30px;
      position: relative;
    }

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

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-info h5 {
      font-size: 0.95rem;
      color: var(--color-dark-indigo);
      font-weight: 700;
    }

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

    /* 行业资讯 & 最新文章 */
    .news-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 40px;
    }

    .news-main {
      background-color: var(--bg-secondary);
      border-radius: 12px;
      padding: 30px;
      border: 1px solid #e2e8f0;
    }

    .article-item {
      padding: 20px 0;
      border-bottom: 1px solid #e2e8f0;
    }

    .article-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .article-item:first-child {
      padding-top: 0;
    }

    .article-title {
      font-size: 1.15rem;
      color: var(--color-dark-indigo);
      font-weight: 700;
      margin-bottom: 8px;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition);
    }

    .article-title:hover {
      color: var(--color-accent-blue);
    }

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

    .news-sidebar {
      background-color: var(--bg-secondary);
      border-radius: 12px;
      padding: 30px;
      border: 1px solid #e2e8f0;
    }

    .news-sidebar h3 {
      font-size: 1.25rem;
      color: var(--color-dark-indigo);
      margin-bottom: 20px;
      font-weight: 700;
    }

    .quick-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .quick-links-list a {
      color: var(--color-accent-blue);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .quick-links-list a:hover {
      color: var(--color-accent-orange);
    }

    /* 需求匹配与联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
    }

    .contact-form-wrap {
      background-color: var(--bg-secondary);
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.03);
      border: 1px solid #cbd5e1;
    }

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

    .form-group label {
      display: block;
      font-weight: 600;
      margin-bottom: 8px;
      font-size: 0.9rem;
      color: var(--color-dark-indigo);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 0.95rem;
      transition: var(--transition);
      background-color: #f8fafc;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--color-accent-cyan);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
    }

    .contact-info-wrap {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-card {
      background-color: var(--bg-secondary);
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 20px;
    }

    .contact-card h4 {
      font-size: 1.1rem;
      color: var(--color-dark-indigo);
      margin-bottom: 8px;
      font-weight: 700;
    }

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

    .qr-area {
      display: flex;
      align-items: center;
      gap: 20px;
      background-color: #f8fafc;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      margin-top: 20px;
    }

    .qr-code img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 1px solid #cbd5e1;
    }

    .qr-desc h5 {
      font-size: 1rem;
      color: var(--color-dark-indigo);
      margin-bottom: 6px;
      font-weight: 700;
    }

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

    /* 页脚 */
    footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

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

    .footer-brand img {
      max-height: 40px;
      margin-bottom: 20px;
    }

    .footer-brand p {
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .footer-links h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--color-accent-cyan);
    }

    .friend-links {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      margin-bottom: 30px;
    }

    .friend-links h5 {
      color: #ffffff;
      margin-bottom: 15px;
      font-weight: 700;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
    }

    .friend-links-list a {
      color: #64748b;
      text-decoration: none;
      transition: var(--transition);
    }

    .friend-links-list a:hover {
      color: var(--color-accent-cyan);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    /* 浮动客服 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 100px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: var(--color-accent-orange);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
      transition: var(--transition);
      text-decoration: none;
      position: relative;
    }

    .float-btn:hover {
      background-color: #ea580c;
      transform: scale(1.05);
    }

    .float-btn svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .qr-tooltip {
      position: absolute;
      right: 60px;
      bottom: 0;
      background-color: #ffffff;
      padding: 16px;
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      display: none;
      flex-direction: column;
      align-items: center;
      width: 150px;
      border: 1px solid #e2e8f0;
    }

    .qr-tooltip img {
      width: 120px;
      height: 120px;
      margin-bottom: 8px;
    }

    .qr-tooltip span {
      font-size: 0.8rem;
      color: var(--text-main);
      font-weight: 700;
    }

    .float-btn:hover .qr-tooltip {
      display: flex;
    }

    /* 移动端响应式优化 */
    @media (max-width: 992px) {
      .about-grid, .faq-grid, .news-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #ffffff;
        padding: 20px;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }