:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --secondary: #06B6D4;
      --accent: #F97316;
      --accent-glow: #F59E0B;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --border-focus: #818CF8;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 25px -5px rgba(79, 70, 229, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --radius-sm: 8px;
      --radius-lg: 20px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

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

    ul, ol {
      list-style: none;
    }

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

    .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: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

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

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 10px 22px;
      border-radius: 9999px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
      background: linear-gradient(135deg, var(--primary-hover) 0%, #4F46E5 100%);
      color: #FFFFFF;
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent) 0%, #EA580C 100%);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
    }

    .btn-accent:hover {
      box-shadow: 0 6px 20px rgba(249, 115, 22, 0.45);
      color: #FFFFFF;
    }

    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-main);
      border-color: var(--border-color);
    }

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

    .btn-sm {
      padding: 6px 16px;
      font-size: 0.85rem;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 Hero 无图片区 - 采用高饱和度撞色几何卡片 */
    .hero-section {
      background: radial-gradient(100% 80% at 50% 0%, #EEF2FF 0%, #FAF5FF 60%, var(--bg-page) 100%);
      padding: 72px 0 64px 0;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FEF3C7;
      color: #B45309;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 9999px;
      margin-bottom: 24px;
      border: 1px solid #FDE68A;
    }

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

    .hero-title span.highlight {
      background: linear-gradient(135deg, #4F46E5 0%, #D946EF 50%, #F97316 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .metric-item .metric-val {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-item .metric-label {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 公共 Section 布局 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background-color: var(--bg-alt);
    }

    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 52px auto;
    }

    .section-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: inline-block;
    }

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

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

    /* 平台矩阵与能力卡片 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

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

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

    .card-icon-pill {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: bold;
      color: #FFFFFF;
      margin-bottom: 20px;
    }

    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-badge {
      display: inline-block;
      align-self: flex-start;
      margin-top: 18px;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
      padding: 4px 10px;
      border-radius: 6px;
    }

    /* 标签云模型清单 */
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 36px;
    }

    .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);
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

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

    /* 左右分栏媒体与特性 */
    .media-feature-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 48px;
    }

    .media-feature-row.reverse {
      flex-direction: row-reverse;
    }

    .media-col, .feature-content-col {
      flex: 1;
      min-width: 0;
    }

    .img-box {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      background: #FFFFFF;
    }

    .feature-list-bullet {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .feature-bullet-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .bullet-check {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #10B981;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 流程图步进样式 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-number {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 12px;
    }

    /* 对比评测卡片与表格 */
    .rating-header-card {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 32px;
      box-shadow: var(--shadow-lg);
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .big-score {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      color: #FBBF24;
    }

    .score-detail {
      font-size: 1rem;
      color: #E0E7FF;
    }

    .stars {
      color: #FBBF24;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
      min-width: 680px;
    }

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

    .compare-table th {
      background-color: #F8FAFC;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .avatar-initial {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary), var(--primary));
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-info h4 {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-container {
      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-sm);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question:hover {
      background-color: #F8FAFC;
    }

    .faq-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 cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      padding: 0 24px 20px 24px;
      transition: max-height 0.3s ease-in-out, padding 0.3s ease;
    }

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

    /* 需求匹配与联系我们表单 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: start;
    }

    .contact-info-card {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .contact-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-box {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
      text-align: center;
    }

    .qr-box p {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 8px;
    }

    .qr-img {
      width: 140px;
      height: 140px;
      margin: 0 auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      padding: 6px;
      background: #FFFFFF;
    }

    .form-box {
      background: #FFFFFF;
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background-color: #F8FAFC;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      background-color: #FFFFFF;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

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

    /* 最新文章列表短代码适配展示 */
    .article-wrap-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .article-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-chip {
      background: var(--bg-alt);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 500;
      border: 1px solid var(--border-color);
      display: inline-block;
    }

    .article-chip:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }

    /* 友情链接与页脚 */
    .footer-section {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 24px 0;
      margin-top: auto;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.25rem;
      margin-bottom: 12px;
      font-weight: 700;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 0.95rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

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

    .footer-col ul a {
      font-size: 0.88rem;
      color: #94A3B8;
    }

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

    .friend-links-box {
      border-top: 1px solid #1E293B;
      padding: 24px 0;
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .friend-links-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: #CBD5E1;
    }

    .friend-links-box a {
      font-size: 0.85rem;
      color: #94A3B8;
      margin-right: 12px;
    }

    .friend-links-box a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* 悬浮客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      cursor: pointer;
      position: relative;
    }

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

    .float-card {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #FFFFFF;
      padding: 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 180px;
      text-align: center;
      color: var(--text-main);
    }

    .back-to-top {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #FFFFFF;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.3rem; }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .media-feature-row, .media-feature-row.reverse {
        flex-direction: column;
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-secondary { display: none; }
      .mobile-menu-btn { display: block; }
      
      .mobile-nav-panel {
        display: none;
        flex-direction: column;
        background: #FFFFFF;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 16px 24px;
        gap: 12px;
      }

      .mobile-nav-panel.open {
        display: flex;
      }

      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .contact-layout { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .rating-header-card {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .score-badge {
        flex-direction: column;
      }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }