:root {
      --primary-blue: #0b57d0;
      --primary-dark: #00378a;
      --primary-bright: #1a73e8;
      --accent-cyan: #00d2ff;
      --accent-orange: #ff6d00;
      --bg-page: #f4f7fc;
      --bg-card: #ffffff;
      --bg-card-soft: #f8faff;
      --text-main: #141d2e;
      --text-muted: #5a6a85;
      --text-light: #8798ad;
      --border-color: #e2e8f4;
      --border-hover: #b9d3fc;
      --shadow-sm: 0 4px 12px rgba(11, 87, 208, 0.04);
      --shadow-md: 0 8px 24px rgba(11, 87, 208, 0.08);
      --shadow-lg: 0 16px 36px rgba(11, 87, 208, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

    ul, ol {
      list-style: none;
    }

    .site-container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 990;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

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

    .brand-group .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.2px;
    }

    .brand-subtitle {
      font-size: 0.75rem;
      background: #e8f0fe;
      color: var(--primary-blue);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.94rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary-blue);
      background-color: #f0f6ff;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: 30px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-bright) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(11, 87, 208, 0.28);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #277ef0 0%, #002c70 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(11, 87, 208, 0.35);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background: #e8f0fe;
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }

    .btn-highlight {
      background: linear-gradient(135deg, #ff7a00 0%, #e65100 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(230, 81, 0, 0.24);
    }

    .btn-highlight:hover {
      background: linear-gradient(135deg, #ff8c1a 0%, #cf4900 100%);
      color: #ffffff;
      transform: translateY(-1px);
    }

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

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

    /* 主体布局 */
    .page-section {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary-blue);
      background-color: #e6f0ff;
      border: 1px solid #c9e0ff;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero (无图设计，宝蓝科技感) */
    .hero-section {
      background: linear-gradient(170deg, #f0f5ff 0%, #e1ecfd 50%, #f4f7fc 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid #dde7f6;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -120px;
      right: -80px;
      width: 480px;
      height: 480px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(26, 115, 232, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
      pointer-events: none;
    }

    .hero-section::after {
      content: "";
      position: absolute;
      bottom: -60px;
      left: -60px;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 210, 255, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: 30px;
      border: 1px solid #cce0ff;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      font-size: 0.88rem;
      color: var(--primary-dark);
      font-weight: 600;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: #00c853;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.2);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary-bright);
      text-shadow: 0 2px 10px rgba(26, 115, 232, 0.18);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .hero-cta-group .btn {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .hero-stat-card {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid #d4e4fc;
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(8px);
      text-align: center;
      transition: var(--transition);
    }

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

    .stat-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.2;
    }

    .stat-label {
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 平台核心卡片通用 */
    .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: 28px;
    }

    .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;
      height: 100%;
    }

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

    .card-icon {
      width: 48px;
      height: 48px;
      background: #eef5ff;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-blue);
      font-size: 1.3rem;
      margin-bottom: 18px;
      font-weight: bold;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 模型矩阵徽章 */
    .model-matrix-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 40px;
    }

    .model-chips-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .model-chip {
      background: #f1f6ff;
      border: 1px solid #d4e4fc;
      color: var(--primary-dark);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 600;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

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

    /* 场景矩阵卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .scenario-badge {
      align-self: flex-start;
      background: #e8f0fe;
      color: var(--primary-blue);
      font-size: 0.78rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 10px;
    }

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

    .scenario-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

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

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary-bright) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(11, 87, 208, 0.25);
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-desc {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测表格与卡片 */
    .rating-banner {
      background: linear-gradient(135deg, #0f3577 0%, #0b57d0 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      box-shadow: var(--shadow-lg);
    }

    .rating-info h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .rating-info p {
      font-size: 0.96rem;
      opacity: 0.9;
    }

    .rating-score-box {
      text-align: center;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.24);
      padding: 16px 28px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(8px);
    }

    .rating-stars {
      color: #ffc107;
      font-size: 1.4rem;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .rating-number {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1;
    }

    .rating-max {
      font-size: 0.9rem;
      opacity: 0.8;
    }

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

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

    .eval-table th {
      background-color: #f1f6ff;
      color: var(--primary-dark);
      font-weight: 700;
    }

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

    .eval-highlight {
      background-color: #f9fbff;
      font-weight: 700;
      color: var(--primary-blue);
    }

    /* 素材与案例展示 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

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

    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #eaeff8;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

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

    .media-card-body {
      padding: 20px;
    }

    .media-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .review-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-stars {
      color: #ff9800;
      font-size: 1rem;
      margin-bottom: 12px;
    }

    .review-body {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0f4fa;
      padding-top: 12px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      background: #e1ebfa;
      color: var(--primary-blue);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .reviewer-meta h4 {
      font-size: 0.92rem;
      font-weight: 700;
    }

    .reviewer-meta span {
      font-size: 0.78rem;
      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: var(--transition);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 20px 24px;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

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

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
      background: #fbfdff;
      padding: 0 24px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 300px;
    }

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

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

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #c9d8ee;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background-color: #fdfefe;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-bright);
      box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
      background-color: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    .contact-info-panel {
      background: linear-gradient(145deg, #f0f6ff 0%, #e6effe 100%);
      border: 1px solid #cde0fb;
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

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

    .contact-item-icon {
      font-size: 1.2rem;
      color: var(--primary-blue);
      line-height: 1.4;
    }

    .contact-item-text h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

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

    .qrcode-box {
      margin-top: 10px;
      text-align: center;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid #d8e5f7;
      display: inline-block;
    }

    .qrcode-box img {
      max-width: 140px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
    }

    .qrcode-box span {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 文章与外链列表 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-top: 14px;
    }

    .article-link-item {
      padding: 10px 14px;
      background: #f7faff;
      border: 1px solid #e1ecfa;
      border-radius: var(--radius-sm);
      font-size: 0.86rem;
      color: var(--primary-blue);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-link-item:hover {
      background: #e9f2ff;
      border-color: var(--primary-bright);
    }

    /* 友情链接区 */
    .links-section {
      background: #eef4fc;
      padding: 24px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .links-wrapper {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .links-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .links-wrapper a {
      font-size: 0.84rem;
      color: var(--text-muted);
      background: #ffffff;
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid #dbe6f5;
    }

    .links-wrapper a:hover {
      color: var(--primary-blue);
      border-color: var(--primary-bright);
    }

    /* 页脚 */
    .site-footer {
      background: #0f2347;
      color: #b0c4de;
      padding: 48px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.86rem;
      line-height: 1.6;
      color: #8fa8cc;
      max-width: 320px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col a {
      color: #8fa8cc;
      font-size: 0.86rem;
    }

    .footer-col a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.82rem;
      color: #7188a8;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom a {
      color: #9cb5d8;
    }

    /* 悬浮客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 998;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-blue);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(11, 87, 208, 0.35);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 1.2rem;
    }

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

    .floating-qr-pop {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      display: none;
      text-align: center;
      width: 160px;
    }

    .floating-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .floating-qr-pop p {
      font-size: 0.76rem;
      color: var(--text-main);
      font-weight: 600;
    }

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

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.2rem; }
      .grid-3, .review-grid, .scenario-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-4, .process-timeline, .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 24px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
        gap: 0;
      }
      .nav-links.show { display: flex; }
      .nav-links a { width: 100%; padding: 10px 0; }
      .nav-actions { display: none; }
      .hero-title { font-size: 1.85rem; }
      .hero-stats-grid { grid-template-columns: 1fr 1fr; }
      .grid-3, .grid-4, .review-grid, .scenario-grid, .media-card-grid { grid-template-columns: 1fr; }
      .process-timeline { grid-template-columns: 1fr; }
      .rating-banner { flex-direction: column; gap: 20px; text-align: center; }
      .footer-grid { grid-template-columns: 1fr; }
      .page-section { padding: 50px 0; }
    }