:root {
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --bg-main: #fbfbfe;
      --bg-alt: #f4f6fc;
      --bg-card: #ffffff;
      --text-main: #141b2d;
      --text-muted: #4e5a77;
      --text-light: #7b88a8;
      --border-color: #e2e8f5;
      
      --brand-rainbow-1: #6366f1;
      --brand-rainbow-2: #ec4899;
      --brand-rainbow-3: #06b6d4;
      --brand-rainbow-4: #f59e0b;
      --brand-rainbow-5: #10b981;
      --brand-gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 50%, #06b6d4 100%);
      --accent-soft: rgba(99, 102, 241, 0.08);
      --shadow-sm: 0 4px 12px rgba(20, 27, 45, 0.05);
      --shadow-md: 0 10px 30px rgba(20, 27, 45, 0.08);
      --shadow-lg: 0 18px 45px rgba(99, 102, 241, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-w: 1200px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 10%, rgba(99, 102, 241, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 25%, rgba(236, 72, 153, 0.04) 0%, transparent 45%),
                  radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.03) 0%, transparent 50%),
                  var(--bg-main);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-area img.ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-name-box {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      background: var(--brand-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
    }
    .brand-sub {
      font-size: 0.72rem;
      color: var(--text-light);
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: block;
      padding: 10px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--brand-rainbow-1);
      background-color: var(--accent-soft);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 40px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--brand-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }
    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(99, 102, 241, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--brand-rainbow-1);
      color: var(--brand-rainbow-1);
      background-color: var(--accent-soft);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 区域通用样式 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      background: linear-gradient(90deg, rgba(99,102,241,0.12), rgba(236,72,153,0.12));
      color: var(--brand-rainbow-1);
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid rgba(99,102,241,0.2);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }
    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-highlight {
      background: linear-gradient(120deg, #6366f1 0%, #ec4899 60%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.65;
    }
    .hero-cta-box {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-btn-official {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      background: linear-gradient(135deg, #ec4899 0%, #6366f1 100%);
      color: #fff;
      border-radius: 50px;
      box-shadow: 0 10px 24px rgba(236, 72, 153, 0.35);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .hero-btn-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 28px rgba(236, 72, 153, 0.45);
      color: #fff;
    }
    .hero-grid-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }
    .stat-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .stat-card:before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--brand-gradient);
      opacity: 0;
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-card:hover:before {
      opacity: 1;
    }
    .stat-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--brand-rainbow-1);
      margin-bottom: 6px;
      display: block;
    }
    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 斑斓标签云 */
    .rainbow-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 30px;
    }
    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 500;
      transition: var(--transition);
    }
    .model-pill:hover {
      border-color: var(--brand-rainbow-1);
      color: var(--brand-rainbow-1);
      background: var(--accent-soft);
      transform: scale(1.04);
    }

    /* 通用网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    /* 卡片通用 */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(236,72,153,0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--brand-rainbow-1);
      font-size: 1.3rem;
      font-weight: 800;
    }
    .card-title {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .card-meta {
      font-size: 0.8rem;
      color: var(--brand-rainbow-1);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* 对比评测表格与卡片 */
    .rating-highlight-box {
      background: linear-gradient(135deg, #ffffff 0%, #fdf4f8 100%);
      border: 2px solid #ec4899;
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
      flex-wrap: wrap;
      gap: 20px;
    }
    .rating-badge-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .rating-star-score {
      font-size: 2.8rem;
      font-weight: 900;
      color: #ec4899;
      line-height: 1;
    }
    .rating-meta-text h3 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .rating-meta-text p {
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .rating-stars {
      color: #f59e0b;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }
    .compare-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.brand-col {
      font-weight: 700;
      color: var(--brand-rainbow-1);
      background: rgba(99, 102, 241, 0.03);
    }
    .tag-badge {
      display: inline-block;
      padding: 3px 8px;
      font-size: 0.75rem;
      font-weight: 600;
      border-radius: 4px;
    }
    .tag-success {
      background: #d1fae5;
      color: #065f46;
    }
    .tag-neutral {
      background: #f3f4f6;
      color: #4b5563;
    }

    /* 流程步骤 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }
    .step-item:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--brand-rainbow-1);
    }
    .step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--brand-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 案例图片网格 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #eef2f6;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-content {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .case-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .case-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 14px;
      flex-grow: 1;
    }

    /* 用户评论 */
    .testimonials-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: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .review-text {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand-rainbow-1), var(--brand-rainbow-3));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }
    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--brand-rainbow-1);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: var(--brand-rainbow-1);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background-color: #fafbfd;
      border-top: 1px solid transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 400px;
      border-top-color: var(--border-color);
      transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
    }
    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求提交表单 */
    .form-box {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full-width {
      grid-column: span 2;
    }
    .form-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.94rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #fdfdfd;
      color: var(--text-main);
      font-family: inherit;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--brand-rainbow-1);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
      background: #fff;
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 行业资讯 & 最新文章 */
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .news-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 14px;
      border-bottom: 1px dashed var(--border-color);
      gap: 16px;
    }
    .news-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .news-title-link {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .news-title-link:hover {
      color: var(--brand-rainbow-1);
    }
    .news-date {
      font-size: 0.82rem;
      color: var(--text-light);
      white-space: nowrap;
    }

    /* 加盟代理与横幅展示 */
    .partner-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      flex-wrap: wrap;
    }
    .partner-text h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }
    .partner-text p {
      color: #cbd5e1;
      font-size: 1rem;
      max-width: 600px;
      line-height: 1.6;
    }
    .partner-cta-btn {
      padding: 14px 32px;
      background: var(--brand-gradient);
      color: #ffffff;
      font-weight: 700;
      font-size: 1rem;
      border-radius: 40px;
      box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
    }
    .partner-cta-btn:hover {
      color: #ffffff;
      transform: scale(1.03);
    }

    /* 宣传图画廊 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }
    .banner-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      aspect-ratio: 16 / 9;
      background: #eef2f6;
    }
    .banner-img-box img.ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 60px 0 30px;
      margin-top: auto;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #9ca3af;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-contact-item {
      margin-bottom: 10px;
      display: flex;
      align-items: flex-start;
      gap: 8px;
      line-height: 1.5;
    }
    .footer-qr {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }
    .footer-qr img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      background: #fff;
      padding: 4px;
    }

    .friend-links-box {
      border-top: 1px solid #1f2937;
      padding: 24px 0;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }
    .friend-links-box span {
      color: #6b7280;
      font-weight: 600;
    }
    .friend-links-box a {
      color: #9ca3af;
      padding: 3px 8px;
      border-radius: 4px;
      background: #1f2937;
    }
    .friend-links-box a:hover {
      color: #ffffff;
      background: #374151;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      color: #6b7280;
      font-size: 0.82rem;
    }

    /* 浮动客服栏 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.2rem;
      transition: var(--transition);
      position: relative;
    }
    .float-btn:hover {
      background: var(--brand-rainbow-1);
      color: #ffffff;
      transform: scale(1.08);
    }
    .float-btn .qr-popover {
      position: absolute;
      right: 58px;
      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;
      color: var(--text-main);
      font-size: 0.8rem;
    }
    .float-btn .qr-popover img {
      width: 116px;
      height: 116px;
      display: block;
      margin-bottom: 6px;
    }
    .float-btn:hover .qr-popover {
      display: block;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .hero-grid-stats { grid-template-columns: repeat(2, 1fr); }
      .timeline-steps { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .banner-gallery { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn { display: block; }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 16px 24px;
        gap: 8px;
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { padding: 10px 0; }
      .header-actions .btn-outline { display: none; }
      
      .hero-h1 { font-size: 2rem; }
      .hero-subtitle { font-size: 1rem; }
      .section-title { font-size: 1.65rem; }
      .hero-grid-stats { grid-template-columns: 1fr; }
      .grid-3, .grid-2, .grid-4, .cases-grid, .testimonials-grid, .timeline-steps, .banner-gallery, .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-grid { grid-template-columns: 1fr; }
      .form-group.full-width { grid-column: span 1; }
      .form-box { padding: 24px; }
      .rating-highlight-box { flex-direction: column; text-align: center; }
      .rating-badge-left { flex-direction: column; }
    }