:root {
      --primary: #0062ff;
      --primary-hover: #0050d4;
      --primary-light: #e8f1ff;
      --accent: #00d285;
      --accent-warm: #ff6b35;
      --text-main: #192132;
      --text-sub: #4e5969;
      --text-muted: #86909c;
      --bg-page: #f5f8fc;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --border-color: #e5eaf3;
      --border-focus: #b5d3ff;
      --shadow-sm: 0 2px 8px rgba(0, 50, 150, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 50, 150, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 50, 150, 0.12);
      --radius: 12px;
      --radius-sm: 8px;
      --radius-lg: 20px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
      background-color: var(--bg-page);
      background-image: 
        radial-gradient(at 0% 0%, rgba(0, 98, 255, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(0, 210, 133, 0.05) 0px, transparent 50%),
        linear-gradient(180deg, #f0f6ff 0%, #f7faff 30%, #f4f8fb 100%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 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: var(--shadow-sm);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
      white-space: nowrap;
    }

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

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

    .nav-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-btn-primary {
      background: linear-gradient(135deg, var(--primary), #007dfe);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 98, 255, 0.25);
    }

    .nav-btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary));
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(0, 98, 255, 0.35);
      color: #ffffff;
    }

    .nav-btn-sub {
      background: #ffffff;
      color: var(--primary);
      border-color: var(--border-focus);
    }

    .nav-btn-sub:hover {
      background: var(--primary-light);
      border-color: var(--primary);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      flex-direction: column;
      gap: 5px;
    }

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

    /* Section 通用样式 */
    .section-wrap {
      padding: 64px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 72px 0 60px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      color: #0b192c;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      font-size: 1.18rem;
      color: var(--text-sub);
      max-width: 760px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-hero-main {
      padding: 14px 36px;
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #0062ff 0%, #0084ff 100%);
      border-radius: 50px;
      box-shadow: 0 8px 24px rgba(0, 98, 255, 0.35);
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-main:hover {
      background: linear-gradient(135deg, #0052db 0%, #0070db 100%);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 98, 255, 0.45);
      color: #ffffff;
    }

    .btn-hero-sec {
      padding: 14px 32px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
    }

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

    /* Hero 数据看板纯色组件 */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .metric-box:hover {
      transform: translateY(-4px);
      border-color: var(--border-focus);
      box-shadow: var(--shadow-md);
    }

    .metric-value {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .metric-title {
      font-size: 0.9rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 支持模型标签云 */
    .model-tags-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 24px;
    }

    .model-tags-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-muted);
      text-transform: uppercase;
      margin-bottom: 14px;
      text-align: center;
      letter-spacing: 0.8px;
    }

    .model-chip-list {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-chip {
      padding: 6px 14px;
      background: var(--bg-page);
      border: 1px solid #e1e7f0;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 平台介绍 & 卡片网格 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 场景矩阵网格 (4列) */
    .scene-grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }

    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .scene-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .scene-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 10px;
    }

    .scene-tag {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: #eef8f3;
      color: var(--accent);
      border-radius: 4px;
      font-weight: 600;
    }

    .scene-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .scene-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.55;
    }

    /* 流程步骤 */
    .process-steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 24px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 1.05rem;
    }

    .step-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 案例图片画廊 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

    .gallery-item {
      background: #ffffff;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .gallery-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .gallery-img-container {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f0f4f8;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .gallery-img-container.square-mode {
      aspect-ratio: 4/3;
    }

    .gallery-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .gallery-item:hover .gallery-img-container img {
      transform: scale(1.03);
    }

    .gallery-body {
      padding: 16px 18px;
    }

    .gallery-body h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .gallery-body p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }

    /* 评测卡片 & 评分展示 */
    .review-score-hero {
      background: linear-gradient(135deg, #ffffff 0%, #f0f6ff 100%);
      border: 2px solid var(--primary-light);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

    .score-main-info {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-badge-circle {
      width: 90px;
      height: 90px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #00a2ff);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(0, 98, 255, 0.3);
      flex-shrink: 0;
    }

    .score-num {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-total {
      font-size: 0.75rem;
      opacity: 0.85;
    }

    .score-desc-title {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .star-row {
      color: #ffb800;
      font-size: 1.2rem;
      margin-bottom: 4px;
    }

    .score-desc-text {
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow-x: auto;
      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: 0.95rem;
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .col-highlight {
      background: #f0f7ff;
      color: var(--primary);
      font-weight: 700;
    }

    .badge-tag-good {
      display: inline-block;
      padding: 3px 10px;
      background: #e6f9f0;
      color: var(--accent);
      border-radius: 4px;
      font-size: 0.82rem;
      font-weight: 600;
    }

    /* 用户评论 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .review-text {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 16px;
      font-style: normal;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0f4f9;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      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-muted);
    }

    /* FAQ 折叠面板 (不少于10条) */
    .faq-accordion-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      align-items: start;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--border-focus);
    }

    .faq-question {
      padding: 16px 20px;
      cursor: pointer;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #ffffff;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      color: var(--primary);
      transition: transform 0.25s ease;
      font-weight: 400;
      margin-left: 8px;
    }

    .faq-item.active .faq-question::after {
      content: "-";
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fcfdfe;
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 20px 18px;
      max-height: 300px;
    }

    /* 文章与资讯 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .article-card-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: block;
    }

    .article-card-item:hover {
      transform: translateY(-3px);
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .article-card-item h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .article-card-item p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 表单与联系区 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-col {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .contact-info-text h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 2px;
    }

    .contact-info-text p, 
    .contact-info-text a {
      font-size: 0.92rem;
      color: var(--text-sub);
    }

    .qr-box {
      margin-top: 10px;
      padding: 16px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      border: 1px dashed var(--border-color);
      display: inline-block;
      text-align: center;
      max-width: 180px;
    }

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

    .qr-box span {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 需求匹配表单 */
    .form-wrapper {
      background: #fcfdfe;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 98, 255, 0.12);
    }

    .form-submit-btn {
      width: 100%;
      padding: 12px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), #007dfe);
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0, 98, 255, 0.2);
    }

    .form-submit-btn:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary));
      box-shadow: 0 6px 16px rgba(0, 98, 255, 0.3);
    }

    /* 友情链接与文章调用区 */
    .links-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 36px 0;
    }

    .links-heading {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .links-cloud a {
      font-size: 0.88rem;
      color: var(--text-sub);
      background: var(--bg-page);
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
    }

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

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 40px 0 24px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      border-bottom: 1px solid #1e293b;
      padding-bottom: 24px;
      margin-bottom: 20px;
    }

    .footer-brand-text {
      color: #ffffff;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .footer-copy {
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮客服挂件 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0, 98, 255, 0.4);
      cursor: pointer;
      transition: var(--transition);
      border: none;
      font-size: 1.1rem;
      position: relative;
    }

    .floating-btn:hover {
      background: var(--primary-hover);
      transform: scale(1.08);
    }

    .floating-qr-popover {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 150px;
      text-align: center;
    }

    .floating-qr-popover img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
      margin-bottom: 4px;
    }

    .floating-qr-popover span {
      font-size: 0.78rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .floating-btn:hover .floating-qr-popover {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .feature-grid-3,
      .reviews-grid,
      .process-steps-row,
      .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .faq-accordion-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
      .mobile-menu-btn {
        display: flex;
      }
    }

    @media (max-width: 600px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .feature-grid-3,
      .reviews-grid,
      .process-steps-row,
      .gallery-grid,
      .hero-metrics-grid {
        grid-template-columns: 1fr;
      }
      .score-main-info {
        flex-direction: column;
        text-align: center;
      }
      .review-score-hero {
        text-align: center;
        justify-content: center;
      }
      .contact-container {
        padding: 20px;
      }
    }