:root {
      --bg-base: #f7f9fd;
      --bg-surface: #ffffff;
      --bg-laser: linear-gradient(135deg, rgba(240, 245, 255, 0.9) 0%, rgba(245, 240, 255, 0.9) 50%, rgba(235, 250, 255, 0.9) 100%);
      --laser-border: linear-gradient(135deg, #a8c0ff 0%, #d8b5ff 50%, #8ee3f5 100%);
      --text-main: #141c2e;
      --text-muted: #58657a;
      --brand-primary: #3b5bdb;
      --brand-accent: #7950f2;
      --brand-cyan: #0ca678;
      --border-color: #e3e8f3;
      --shadow-sm: 0 4px 12px rgba(20, 28, 46, 0.04);
      --shadow-md: 0 8px 24px rgba(74, 58, 255, 0.08);
      --shadow-lg: 0 16px 36px rgba(74, 58, 255, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(224, 231, 255, 0.5) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(243, 232, 255, 0.5) 0%, transparent 40%),
                  var(--bg-base);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(227, 232, 243, 0.8);
      transition: all 0.3s ease;
    }

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

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

    .brand-logo-holder {
      height: 38px;
      display: flex;
      align-items: center;
    }

    .brand-logo-holder img {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.15rem;
      font-weight: 700;
      background: linear-gradient(135deg, #1f2937, #4f46e5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--brand-primary);
      background: rgba(59, 91, 219, 0.06);
    }

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

    .btn-laser {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #ffffff !important;
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
      border-radius: 30px;
      border: none;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-laser:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--brand-primary);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      transition: all 0.2s ease;
    }

    .btn-outline:hover {
      border-color: var(--brand-primary);
      background: rgba(59, 91, 219, 0.04);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 通用分节与标题 */
    section {
      padding: 70px 0;
      position: relative;
    }

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

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--brand-primary);
      background: rgba(59, 91, 219, 0.08);
      border: 1px solid rgba(59, 91, 219, 0.15);
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

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

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

    /* 镭射卡片基底 */
    .laser-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    }

    .laser-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 60px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-glow {
      position: absolute;
      width: 600px;
      height: 300px;
      top: 10%;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(217, 70, 239, 0.15), rgba(6, 182, 212, 0.15));
      filter: blur(80px);
      border-radius: 50%;
      z-index: 0;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid rgba(168, 192, 255, 0.6);
      box-shadow: 0 2px 8px rgba(79, 70, 229, 0.08);
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--brand-accent);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: #0f172a;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.6;
      max-width: 780px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

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

    .stat-card {
      padding: 20px;
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(227, 232, 243, 0.9);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .stat-card .num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--brand-primary);
      margin-bottom: 4px;
    }

    .stat-card .label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台介绍与模型聚合标签 */
    .models-marquee-wrap {
      margin-top: 30px;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }

    .models-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .tag-item {
      padding: 6px 12px;
      background: #f1f5f9;
      color: #334155;
      font-size: 0.82rem;
      font-weight: 600;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      background: var(--brand-primary);
      color: #ffffff;
      border-color: var(--brand-primary);
    }

    /* 服务能力卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .service-card {
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
      color: var(--brand-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    .service-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    /* 行业方案矩阵 */
    .solution-item {
      padding: 20px;
      border-left: 3px solid var(--brand-primary);
    }

    .solution-item h3 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

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

    /* 标准流程时间线 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .process-step-num {
      width: 36px;
      height: 36px;
      line-height: 36px;
      margin: 0 auto 16px auto;
      border-radius: 50%;
      background: var(--brand-primary);
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
    }

    /* 对比评测板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
      border: 2px solid #c7d2fe;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-wrap {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-big {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--brand-primary);
      line-height: 1;
    }

    .score-max {
      font-size: 1.2rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .stars {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .eval-table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }

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

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

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

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

    .eval-table .highlight-col {
      background: rgba(238, 242, 255, 0.4);
      font-weight: 600;
      color: var(--brand-primary);
    }

    /* 案例展示与图文物料 */
    .media-card {
      overflow: hidden;
      border-radius: var(--radius-md);
      background: #ffffff;
      border: 1px solid var(--border-color);
    }

    .media-img-holder {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
    }

    .media-img-holder.square {
      aspect-ratio: 1 / 1;
    }

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

    .media-card:hover .media-img-holder img {
      transform: scale(1.04);
    }

    .media-info {
      padding: 20px;
    }

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

    .review-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: #334155;
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #a5b4fc, #c084fc);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 0.9rem;
    }

    .author-name {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* 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-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      line-height: 1;
      color: var(--brand-primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 24px;
      background: #fbfcfe;
    }

    .faq-answer p {
      padding: 14px 0 20px 0;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 文章列表 */
    .article-links-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      background: #f8fafc;
      font-size: 0.92rem;
      font-weight: 500;
      color: #334155;
    }

    .article-link-item:hover {
      background: rgba(59, 91, 219, 0.08);
      color: var(--brand-primary);
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      max-width: 680px;
      margin: 0 auto;
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #fcfdfe;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--brand-primary);
      box-shadow: 0 0 0 3px rgba(59, 91, 219, 0.15);
    }

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

    /* 底部页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
      margin-top: auto;
      color: var(--text-main);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .qr-box {
      width: 108px;
      height: 108px;
      padding: 4px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 8px;
    }

    .friend-links-wrap {
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .friend-links-wrap a {
      color: var(--text-muted);
    }

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

    .footer-bottom {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid #f1f5f9;
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 悬浮客服 */
    .floating-contact {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-primary);
      cursor: pointer;
      position: relative;
    }

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

    .float-popover {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

    .float-popover img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-4, .grid-3, .reviews-grid, .process-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
      }
    }