/* 全局变量与鲜绿夺目风主题 */
    :root {
      --primary-color: #00B050;
      --primary-hover: #009643;
      --primary-light: #EBFBF3;
      --primary-glow: rgba(0, 176, 80, 0.18);
      --accent-color: #10B981;
      --text-main: #0F172A;
      --text-sub: #475569;
      --text-muted: #64748B;
      --bg-page: #F8FAF9;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --border-focus: #00B050;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0, 176, 80, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 176, 80, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

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

    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    /* 统一样式容器 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-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);
      transition: all 0.3s ease;
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-title span {
      color: var(--primary-color);
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-sub);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      transition: color 0.2s ease;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
      font-weight: 600;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      text-decoration: none;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #FFFFFF;
      box-shadow: 0 4px 14px var(--primary-glow);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px var(--primary-glow);
      color: #FFFFFF;
    }

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

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: all 0.3s ease;
    }

    /* 主体布局与分块 */
    main {
      flex: 1;
    }

    section {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-color);
      font-size: 13px;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid rgba(0, 176, 80, 0.2);
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* Hero 首屏 (严格无图片，纯CSS/几何/科技感构建) */
    .hero-section {
      padding: 90px 0 80px 0;
      background: linear-gradient(180deg, #FFFFFF 0%, var(--primary-light) 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFFFFF;
      border: 1px solid rgba(0, 176, 80, 0.3);
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-color);
      border-radius: 50%;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 176, 80, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 176, 80, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 176, 80, 0); }
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      color: var(--primary-color);
      position: relative;
      display: inline-block;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-sub);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-btn-main {
      padding: 14px 32px;
      font-size: 16px;
      font-weight: 700;
      background: linear-gradient(135deg, #00B050 0%, #10B981 100%);
      color: #FFFFFF;
      border-radius: var(--radius-sm);
      text-decoration: none;
      box-shadow: 0 8px 24px rgba(0, 176, 80, 0.3);
      transition: all 0.3s ease;
    }

    .hero-btn-main:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(0, 176, 80, 0.4);
      color: #FFFFFF;
    }

    .hero-features-list {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      border-top: 1px dashed rgba(0, 176, 80, 0.3);
      padding-top: 24px;
    }

    .hero-feat-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .hero-feat-item svg {
      width: 18px;
      height: 18px;
      fill: var(--primary-color);
    }

    /* 首屏纯CSS科技数据卡片构造 */
    .hero-visual-card {
      background: #FFFFFF;
      border: 1px solid rgba(0, 176, 80, 0.2);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .visual-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border-color);
    }

    .visual-badge {
      background: var(--primary-light);
      color: var(--primary-color);
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
    }

    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .model-pill {
      background: #F1F5F9;
      color: var(--text-sub);
      font-size: 12px;
      font-weight: 600;
      padding: 6px 12px;
      border-radius: 20px;
      border: 1px solid #E2E8F0;
      transition: all 0.2s ease;
    }

    .model-pill.active {
      background: var(--primary-light);
      color: var(--primary-color);
      border-color: rgba(0, 176, 80, 0.4);
    }

    .pipeline-status-box {
      background: #F8FAF9;
      border-radius: var(--radius-md);
      padding: 18px;
      border: 1px solid rgba(0, 176, 80, 0.15);
    }

    .pipeline-step {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
      font-size: 13px;
    }

    .pipeline-step:last-child {
      margin-bottom: 0;
    }

    .pipeline-name {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-main);
      font-weight: 600;
    }

    .pipeline-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary-color);
    }

    .pipeline-val {
      font-weight: 700;
      color: var(--primary-color);
    }

    /* 指标统计卡片 */
    .stats-section {
      padding: 40px 0;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-card {
      text-align: center;
      padding: 24px 16px;
      background: #FAFCFB;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      transition: transform 0.3s ease, border-color 0.3s ease;
    }

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

    .stat-num {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-sub);
      font-weight: 600;
    }

    /* 通用卡片网格系统 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      color: var(--primary-color);
    }

    .feature-icon-box svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      flex: 1;
    }

    /* 场景与模型支持标签 */
    .supported-models-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 36px;
      text-align: center;
    }

    .supported-models-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .model-tag-item {
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      background: #F1F5F9;
      color: var(--text-sub);
      border-radius: 20px;
      border: 1px solid var(--border-color);
      transition: all 0.2s;
    }

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

    /* 流程步骤 */
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      position: relative;
      text-align: center;
      transition: all 0.3s;
    }

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

    .step-number {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary-color);
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px auto;
      box-shadow: 0 4px 12px var(--primary-glow);
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 媒体与图片展示区 (非首屏) */
    .media-showcase {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .media-grid-banner {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }

    .media-card {
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #F8FAF9;
    }

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .media-materials-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }

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

    .material-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    .material-caption {
      padding: 12px 16px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }

    /* 对比评测表格与评测卡片 */
    .review-highlight-box {
      background: linear-gradient(135deg, #FFFFFF 0%, var(--primary-light) 100%);
      border: 2px solid var(--primary-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 36px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-md);
    }

    .review-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-circle {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #FFFFFF;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      box-shadow: 0 6px 18px var(--primary-glow);
    }

    .score-circle .score-num {
      font-size: 26px;
      line-height: 1;
    }

    .score-circle .score-max {
      font-size: 11px;
      opacity: 0.9;
    }

    .score-details h3 {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .star-rating {
      color: #F59E0B;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .custom-table th {
      background: #F8FAF9;
      color: var(--text-main);
      font-weight: 700;
    }

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

    .custom-table .col-highlight {
      background: rgba(0, 176, 80, 0.04);
      font-weight: 600;
      color: var(--primary-color);
    }

    .badge-check {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: var(--primary-color);
      font-weight: 700;
    }

    /* 用户评论 */
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
      transition: all 0.3s;
    }

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

    .testi-content {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: normal;
    }

    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .user-avatar-initial {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .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-md);
      overflow: hidden;
      transition: all 0.25s ease;
    }

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

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      user-select: none;
    }

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

    .faq-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #FAFCFB;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
      border-top: 1px solid rgba(0, 176, 80, 0.1);
    }

    /* 表单与需求匹配 */
    .form-container-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group-full {
      grid-column: 1 / -1;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #FAFCFB;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

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

    /* 文章与资讯 */
    .article-links-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-url-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-url-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: #F8FAF9;
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 14px;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: all 0.2s;
    }

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

    /* 页脚与友情链接 */
    .site-footer {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 24px 0;
      color: var(--text-sub);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-top: 14px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

    .footer-links-list li a {
      color: var(--text-sub);
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }

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

    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 12px;
    }

    .footer-qrcode-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-top: 16px;
    }

    .footer-qrcode-wrap img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      padding: 4px;
      background: #FFFFFF;
    }

    .footer-friendlinks {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }

    .footer-friendlinks strong {
      color: var(--text-main);
    }

    .footer-friendlinks a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 浮动客服栏 */
    .float-kefu-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary-color);
      transition: all 0.3s;
      text-decoration: none;
      position: relative;
    }

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

    .float-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    .float-qr-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }

    .float-qr-pop p {
      font-size: 12px;
      color: var(--text-main);
      margin-top: 6px;
      font-weight: 600;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 12px 0;
        border-bottom: 1px solid #F1F5F9;
      }
      .mobile-menu-btn {
        display: block;
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-grid-banner {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-materials-grid {
        grid-template-columns: 1fr;
      }
      .custom-form {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 26px;
      }
    }