:root {
      --bg-main: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --border-color: #e2e8f0;
      --holo-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 25%, #db2777 50%, #0284c7 75%, #059669 100%);
      --holo-bg-soft: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(219, 39, 119, 0.06) 50%, rgba(6, 182, 212, 0.08) 100%);
      --holo-border: linear-gradient(135deg, rgba(99, 102, 241, 0.4), rgba(236, 72, 153, 0.4), rgba(6, 182, 212, 0.4));
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-holo: 0 10px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(219, 39, 119, 0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-main);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background: var(--bg-main);
      line-height: 1.65;
      overflow-x: hidden;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 100vh;
      background: 
        radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.07) 0%, transparent 45%),
        radial-gradient(circle at 85% 20%, rgba(219, 39, 119, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
      pointer-events: none;
      z-index: -1;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      color: var(--primary-dark);
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
    }

    .nav-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: 40px;
      width: auto;
      object-fit: contain;
    }

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

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      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: rgba(79, 70, 229, 0.06);
    }

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

    .btn-nav-primary {
      padding: 8px 18px;
      border-radius: 9999px;
      background: var(--holo-gradient);
      color: #ffffff !important;
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      font-size: 1.1rem;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }

    .holo-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 9999px;
      background: #ffffff;
      border: 1px solid rgba(219, 39, 119, 0.3);
      box-shadow: 0 2px 10px rgba(99, 102, 241, 0.1);
      font-size: 0.85rem;
      font-weight: 600;
      color: #7c3aed;
      margin-bottom: 24px;
    }

    .holo-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #ec4899;
      box-shadow: 0 0 8px #ec4899;
      animation: pulseGlow 2s infinite ease-in-out;
    }

    @keyframes pulseGlow {
      0%, 100% { opacity: 0.6; transform: scale(1); }
      50% { opacity: 1; transform: scale(1.3); }
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

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

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      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;
    }

    .btn-main-action {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 9999px;
      color: #ffffff !important;
      background: var(--holo-gradient);
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(219, 39, 119, 0.35);
    }

    .btn-sub-action {
      padding: 14px 28px;
      font-size: 1.02rem;
      font-weight: 600;
      border-radius: 9999px;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .btn-sub-action:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(79, 70, 229, 0.04);
    }

    /* 首屏数据卡片（无图片，几何与数字构成） */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 10px;
    }

    .stat-holo-card {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .stat-holo-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--holo-gradient);
    }

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

    .stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.86rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用Section布局 */
    .section-block {
      padding: 70px 0;
      position: relative;
    }

    .section-block.alt-bg {
      background: rgba(241, 245, 249, 0.6);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-subtitle {
      font-size: 0.86rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #7c3aed;
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 卡片网格 */
    .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;
      align-items: center;
    }

    /* 镭射卡片通用 */
    .holo-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .holo-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-holo);
      border-color: rgba(99, 102, 241, 0.3);
    }

    .card-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 9999px;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      margin-bottom: 14px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }

    .tag-item {
      font-size: 0.76rem;
      background: var(--bg-subtle);
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 模型矩阵徽章墙 */
    .models-marquee {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: scale(1.04);
      background: rgba(79, 70, 229, 0.03);
    }

    /* 标准流程时间线 */
    .process-steps-grid {
      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 20px;
      text-align: left;
      position: relative;
      transition: all 0.25s ease;
    }

    .step-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-holo);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--holo-gradient);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 0.95rem;
    }

    .step-item h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* 对比评测板块 */
    .eval-score-banner {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-holo);
      position: relative;
      overflow: hidden;
    }

    .eval-score-banner::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 6px;
      height: 100%;
      background: var(--holo-gradient);
    }

    .eval-score-left {
      max-width: 680px;
    }

    .eval-score-left h3 {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .eval-score-left p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .eval-score-right {
      text-align: center;
      padding: 16px 28px;
      background: var(--holo-bg-soft);
      border-radius: var(--radius-md);
      border: 1px solid rgba(219, 39, 119, 0.2);
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .eval-points {
      font-size: 2.3rem;
      font-weight: 900;
      color: #4f46e5;
      line-height: 1;
    }

    .eval-total {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 4px;
    }

    /* 对比评测表格 */
    .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);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

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

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

    .compare-table .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    .tag-yes {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: #dcfce7;
      color: #15803d;
      font-size: 0.78rem;
      font-weight: 600;
    }

    .tag-no {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: #fee2e2;
      color: #b91c1c;
      font-size: 0.78rem;
    }

    /* 案例中心 */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--bg-subtle);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .case-info {
      padding: 20px;
    }

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

    .case-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 用户评论 */
    .testimonial-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;
    }

    .testimonial-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .user-avatar-initial {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--holo-gradient);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }

    .user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      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: all 0.2s ease;
    }

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

    .faq-header {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }

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

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

    .faq-body {
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: none;
    }

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

    /* 需求匹配表单与联系 */
    .form-box-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: var(--shadow-holo);
    }

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

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

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

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

    .btn-submit {
      width: 100%;
      padding: 13px;
      background: var(--holo-gradient);
      color: #ffffff;
      font-weight: 700;
      font-size: 1rem;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
      transition: all 0.25s ease;
    }

    .btn-submit:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.35);
    }

    /* 文章列表 */
    .article-links-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-list li a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
      font-size: 0.92rem;
      padding: 8px 12px;
      border-radius: 6px;
      background: var(--bg-subtle);
      transition: all 0.2s ease;
    }

    .article-list li a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
      padding-left: 16px;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.86rem;
      line-height: 1.6;
      color: var(--text-muted);
      margin-bottom: 14px;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list a {
      color: var(--text-muted);
      font-size: 0.86rem;
    }

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

    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.86rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-wrap a {
      font-size: 0.82rem;
      color: var(--text-light);
      background: var(--bg-subtle);
      padding: 3px 10px;
      border-radius: 4px;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 浮动客服入口 */
    .float-kefu-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 14px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      font-size: 1.1rem;
      transition: all 0.25s ease;
      position: relative;
    }

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

    .kefu-popover {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: var(--shadow-holo);
      width: 180px;
      text-align: center;
      display: none;
    }

    .kefu-popover img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .kefu-popover p {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin: 0;
    }

    .float-btn.kefu-btn:hover .kefu-popover {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-steps-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.mobile-open li { width: 100%; }
      .nav-links.mobile-open li a { width: 100%; padding: 10px 0; }
    }

    @media (max-width: 640px) {
      .hero-title { font-size: 1.8rem; }
      .grid-3, .grid-4, .process-steps-grid, .hero-stats-grid, .footer-grid { grid-template-columns: 1fr; }
      .eval-score-banner { flex-direction: column; gap: 20px; text-align: center; }
      .eval-score-banner::before { width: 100%; height: 4px; }
      .section-block { padding: 48px 0; }
      .float-kefu-widget { right: 12px; bottom: 20px; }
    }