:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --accent-pink: #EC4899;
      --accent-cyan: #06B6D4;
      --accent-amber: #F59E0B;
      --accent-emerald: #10B981;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 20px 35px -10px rgba(79, 70, 229, 0.15);
      --container-width: 1240px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    .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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap img {
      max-height: 42px;
      width: auto;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover {
      color: var(--primary);
      background: #EEF2FF;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }
    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
    }
    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-main);
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background: #F1F5F9;
      border-color: #CBD5E1;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 85% 15%, rgba(236, 72, 153, 0.12) 0%, transparent 40%),
                  radial-gradient(circle at 15% 85%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
                  linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 9999px;
      font-weight: 700;
      font-size: 0.88rem;
      margin-bottom: 24px;
      border: 1px solid rgba(79, 70, 229, 0.2);
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 60%, var(--accent-amber) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-actions .btn-huge {
      padding: 16px 36px;
      font-size: 1.1rem;
      border-radius: var(--radius-md);
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.3);
    }
    .metric-number {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 页面基础排版组件 */
    .section-py {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent-pink);
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 平台矩阵生态 */
    .models-marquee-wrap {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 40px;
    }
    .marquee-label {
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .model-pill {
      background: #F1F5F9;
      color: #334155;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid #E2E8F0;
      transition: var(--transition);
    }
    .model-pill:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: linear-gradient(180deg, var(--primary), var(--accent-pink));
      opacity: 0;
      transition: var(--transition);
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.4);
    }
    .service-card:hover::before {
      opacity: 1;
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin-bottom: 20px;
    }
    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .service-meta {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 案例展示区带真实图片 */
    .case-container {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: stretch;
    }
    .case-banner-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-img-wrap {
      width: 100%;
      background: #F1F5F9;
      position: relative;
    }
    .case-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .case-content-box {
      padding: 24px;
    }
    .case-badge {
      font-size: 0.75rem;
      background: var(--accent-pink);
      color: #fff;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 700;
      display: inline-block;
      margin-bottom: 10px;
    }
    .case-title {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .case-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .case-side-cards {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .case-sub-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .case-sub-img {
      width: 100%;
      background: #F1F5F9;
    }
    .case-sub-img img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    /* 对比评测表格板块 */
    .compare-box {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
      padding: 36px;
    }
    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 32px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-title {
      font-size: 1.4rem;
      font-weight: 800;
    }
    .score-metrics {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .score-badge-main {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-amber);
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .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;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: #FAFAFA;
    }
    .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 700;
      color: var(--primary);
    }
    .badge-check {
      color: var(--accent-emerald);
      font-weight: 800;
      margin-right: 4px;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(79, 70, 229, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-name {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 28px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary), var(--accent-pink));
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .reviewer-info h4 {
      font-size: 1rem;
      font-weight: 700;
    }
    .reviewer-info p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: rgba(79, 70, 229, 0.4);
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.05rem;
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FAFAFA;
      border-top: 1px solid transparent;
    }
    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-answer {
      border-top-color: var(--border-color);
    }

    /* 需求匹配与表单 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: var(--bg-card);
      padding: 44px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .form-info h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .form-info p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .qr-card {
      background: #F8FAFC;
      border: 1px dashed #CBD5E1;
      border-radius: var(--radius-md);
      padding: 18px;
      display: inline-flex;
      align-items: center;
      gap: 16px;
      margin-top: 10px;
    }
    .qr-card img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      display: block;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background: #FFFFFF;
      font-family: inherit;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 文章列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .article-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .article-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .article-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* 友情链接与页脚 */
    .friend-links-box {
      padding: 24px 0;
      border-top: 1px solid var(--border-color);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }
    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .friend-links-box a {
      font-size: 0.88rem;
      color: var(--text-muted);
      background: #FFFFFF;
      padding: 4px 12px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }
    .friend-links-box a:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 50px 0 28px;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.3rem;
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      max-width: 440px;
    }
    .footer-list-title {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.9rem;
    }
    .footer-list a {
      color: #94A3B8;
    }
    .footer-list a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      text-align: center;
      font-size: 0.85rem;
      padding-top: 24px;
      border-top: 1px solid #1E293B;
      color: #64748B;
    }

    /* 浮动工具栏 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 99;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: #FFFFFF;
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.12);
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      font-size: 1.1rem;
      font-weight: bold;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      transform: translateY(-3px);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .services-grid, .reviews-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid, .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-container {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 2rem;
      }
      .services-grid, .reviews-grid, .articles-grid, .steps-grid, .hero-metrics {
        grid-template-columns: 1fr;
      }
      .form-section-wrap {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }