:root {
      --primary: #FF5500;
      --primary-hover: #E04B00;
      --primary-light: #FFF2EB;
      --primary-gradient: linear-gradient(135deg, #FF6A00 0%, #EE0979 100%);
      --accent: #FF3E00;
      --text-main: #1D2129;
      --text-muted: #4E5969;
      --text-light: #86909C;
      --bg-page: #FAF9F7;
      --bg-card: #FFFFFF;
      --border-color: #EFECE6;
      --shadow-sm: 0 2px 8px rgba(255, 85, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(238, 9, 121, 0.08);
      --shadow-hover: 0 14px 30px rgba(255, 85, 0, 0.15);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

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

    body {
      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;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    /* 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);
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

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

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      text-align: center;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 85, 0, 0.45);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

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

    /* 响应式导航折叠 */
    @media (max-width: 992px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 12px 24px rgba(0,0,0,0.06);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
      }
      .nav-links.active {
        max-height: 520px;
        padding: 16px 20px;
      }
      .nav-links a {
        padding: 12px 16px;
      }
      .header-actions .btn {
        display: none;
      }
    }

    /* Hero 首屏 - 纯代码与几何动效，严禁图片 */
    .hero-section {
      position: relative;
      padding: 70px 0 60px;
      background: radial-gradient(circle at 85% 15%, rgba(255, 106, 0, 0.12) 0%, transparent 60%),
                  radial-gradient(circle at 15% 85%, rgba(238, 9, 121, 0.08) 0%, transparent 50%),
                  #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid rgba(255, 85, 0, 0.2);
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 85, 0, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(255, 85, 0, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 85, 0, 0); }
    }

    h1.hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    h1.hero-title .highlight {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
    }

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

    .btn-hero-large {
      padding: 14px 34px;
      font-size: 1.08rem;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
    }

    .hero-stat-item .num {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      font-family: inherit;
    }

    .hero-stat-item .lbl {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 首屏纯CSS科技感控制台卡片 */
    .hero-console-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 85, 0, 0.2);
      box-shadow: 0 20px 40px rgba(255, 85, 0, 0.12);
      padding: 28px;
      position: relative;
    }

    .console-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }

    .console-dots {
      display: flex;
      gap: 6px;
    }

    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #FF5F56; }
    .dot-yellow { background: #FFBD2E; }
    .dot-green { background: #27C93F; }

    .console-status {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: 20px;
    }

    .console-metrics {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .metric-row {
      background: #FDFBF9;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 14px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: transform 0.2s ease;
    }

    .metric-row:hover {
      transform: translateX(4px);
      border-color: rgba(255, 85, 0, 0.4);
    }

    .metric-info {
      display: flex;
      flex-direction: column;
    }

    .metric-name {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .metric-sub {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .metric-tag {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      background: #FFF4E5;
      color: #D93800;
    }

    /* 模块通用标题 */
    .section-spacing {
      padding: 80px 0;
    }

    .section-title-wrap {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

    .section-subtitle {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: block;
    }

    h2.section-heading {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.35;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 平台介绍板块 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .intro-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.3s ease;
    }

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

    .intro-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .intro-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .intro-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* AIGC 服务与场景应用 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }

    .service-item-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    }

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

    .service-item-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(255, 85, 0, 0.3);
    }

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

    .service-tag {
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: #FFF0E6;
      color: var(--primary);
      font-weight: 600;
      display: inline-block;
      margin-bottom: 12px;
    }

    .service-item-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-item-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型聚合生态标签墙 */
    .models-cloud-wrap {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-top: 40px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .cloud-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--text-main);
    }

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

    .model-tag {
      padding: 8px 16px;
      background: #F8F7F5;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

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

    /* 对比评测板块 */
    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .score-summary-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: var(--primary-light);
      border: 1px dashed rgba(255, 85, 0, 0.4);
      padding: 20px 30px;
      border-radius: var(--radius-md);
      margin-bottom: 32px;
    }

    .score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

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

    .score-max {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    .rating-stars {
      color: #FF9900;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

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

    .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);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #FDFBF9;
      font-weight: 700;
      color: var(--text-main);
    }

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

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

    /* 案例中心图文 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .case-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .case-img-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #EEEAE4;
      overflow: hidden;
    }

    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .case-card:hover .case-img-box img {
      transform: scale(1.04);
    }

    .case-content {
      padding: 24px;
    }

    .case-content h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .review-card:hover {
      border-color: var(--primary);
    }

    .review-stars {
      color: #FF9900;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

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

    .author-avatar-text {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-info h4 {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* 常见问题 FAQ 折叠 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

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

    .faq-header {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-header h3 {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: bold;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

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

    .faq-body {
      padding: 0 24px 20px;
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

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

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

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

    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #FAF9F7;
      color: var(--text-main);
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.15);
      background: #FFFFFF;
    }

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

    .contact-details {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 24px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

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

    .qrcode-box {
      background: #FDFBF9;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      display: inline-block;
      max-width: 220px;
    }

    .qrcode-box img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      margin-bottom: 8px;
      border-radius: 4px;
    }

    .qrcode-box span {
      display: block;
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 行业资讯文章与轮播展区 */
    .articles-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item {
      background: #FAF9F7;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      transition: all 0.2s ease;
    }

    .article-item:hover {
      background: #FFFFFF;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .article-link {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      display: block;
      line-height: 1.5;
    }

    .article-link:hover {
      color: var(--primary);
    }

    .banner-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }

    .banner-strip .ai-page-image {
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      aspect-ratio: 16 / 9;
      object-fit: cover;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #F4F1EA;
      color: var(--text-main);
      padding: 50px 0 30px;
      border-top: 1px solid var(--border-color);
    }

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

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      max-width: 480px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

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

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

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

    .footer-links-wrap {
      border-top: 1px solid #E5E0D5;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .footer-bottom {
      border-top: 1px solid #E5E0D5;
      padding-top: 20px;
      text-align: center;
      font-size: 0.84rem;
      color: var(--text-light);
    }

    /* 悬浮工具组件 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #FFFFFF;
      box-shadow: 0 4px 16px rgba(0,0,0,0.12);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.2rem;
      transition: all 0.25s ease;
      position: relative;
    }

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

    .float-btn-qr {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
    }

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

    .float-btn-qr img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 响应式断点适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
      .cases-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .banner-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 600px) {
      h1.hero-title {
        font-size: 1.85rem;
      }
      h2.section-heading {
        font-size: 1.6rem;
      }
      .hero-stats-row {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .banner-strip {
        grid-template-columns: 1fr;
      }
      .score-summary-bar {
        flex-direction: column;
        align-items: flex-start;
      }
    }