:root {
      --primary: #059669;
      --primary-hover: #047857;
      --primary-light: #ecfdf5;
      --primary-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
      --accent: #10b981;
      --accent-glow: rgba(16, 185, 129, 0.15);
      --dark-text: #0f172a;
      --body-text: #334155;
      --muted-text: #64748b;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --border-color: #e2e8f0;
      --card-shadow: 0 4px 20px -2px rgba(16, 185, 129, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
      --transition: all 0.3s 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, sans-serif;
      background-color: var(--bg-page);
      color: var(--body-text);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .site-container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background-color: var(--primary-light);
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: 9999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--muted-text);
      max-width: 680px;
      margin: 0 auto;
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .navbar {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }
    .brand-text span {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--body-text);
      padding: 8px 14px;
      border-radius: 6px;
      transition: var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: 8px;
      padding: 10px 22px;
      font-size: 0.95rem;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #059669 0%, #047857 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(5, 150, 105, 0.4);
    }
    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 7px 16px;
      font-size: 0.875rem;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--dark-text);
    }
    /* 首屏 Hero (严格无图片) */
    .hero-section {
      background: radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.12) 0%, transparent 60%),
                  linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
      padding: 90px 0 80px;
      text-align: center;
      position: relative;
      border-bottom: 1px solid rgba(16, 185, 129, 0.15);
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: 9999px;
      font-size: 0.9rem;
      color: var(--primary);
      font-weight: 600;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      border: 1px solid rgba(16, 185, 129, 0.2);
      margin-bottom: 24px;
    }
    .hero-tag::before {
      content: "";
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-title .text-gradient {
      color: var(--primary);
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--body-text);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }
    .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: 20px;
      margin-top: 40px;
    }
    .hero-stat-box {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      transition: var(--transition);
    }
    .hero-stat-box:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(16, 185, 129, 0.12);
    }
    .stat-metric {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--muted-text);
      font-weight: 500;
    }
    /* 核心矩阵与模型支持 */
    .model-badge-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }
    .model-badge {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--body-text);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
    }
    .model-badge:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }
    /* 卡片网格布局 */
    .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 {
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .service-card:hover {
      border-color: var(--primary);
      box-shadow: var(--card-shadow);
      transform: translateY(-5px);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 18px;
      font-weight: 700;
    }
    .service-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }
    .service-desc {
      font-size: 0.925rem;
      color: var(--muted-text);
      line-height: 1.6;
      flex-grow: 1;
    }
    /* 媒体图文展示 (首屏外) */
    .showcase-block {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 32px;
      margin-bottom: 30px;
      box-shadow: var(--card-shadow);
    }
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      align-items: center;
      margin-top: 24px;
    }
    .media-wrapper {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #f1f5f9;
    }
    .media-wrapper img {
      width: 100%;
      height: auto;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }
    .media-wrapper:hover img {
      transform: scale(1.02);
    }
    /* 流程步骤 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.875rem;
      color: var(--muted-text);
    }
    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .score-summary-bar {
      background: linear-gradient(90deg, #ecfdf5 0%, #ffffff 100%);
      padding: 24px 32px;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-badge-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .stars {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }
    .score-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .compare-table th {
      background-color: #f8fafc;
      color: var(--dark-text);
      font-weight: 700;
    }
    .highlight-col {
      background: rgba(16, 185, 129, 0.03);
      font-weight: 600;
      color: var(--primary);
    }
    /* 需求匹配表单 */
    .form-section-card {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--card-shadow);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-text);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background-color: #ffffff;
      color: var(--dark-text);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }
    textarea.form-control {
      min-height: 120px;
      resize: vertical;
    }
    /* FAQ 折叠面板 */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: var(--accent);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      color: var(--dark-text);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      transition: var(--transition);
    }
    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: var(--muted-text);
      font-size: 0.925rem;
      line-height: 1.6;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafbfc;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px 24px;
      border-top: 1px solid var(--border-color);
    }
    /* 客户评论卡片 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .testimonial-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--card-shadow);
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }
    .user-avatar-text {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .user-info-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark-text);
    }
    .user-info-role {
      font-size: 0.825rem;
      color: var(--muted-text);
    }
    /* 资讯文章列表 */
    .article-links-wrap {
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      padding: 24px 32px;
      margin-top: 24px;
    }
    .article-url-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      list-style: none;
      margin-top: 16px;
    }
    .article-url-list a {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.875rem;
      color: var(--body-text);
      transition: var(--transition);
      word-break: break-all;
    }
    .article-url-list a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: var(--primary-light);
    }
    /* 联系通道 & 加盟代理 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }
    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.95rem;
      color: var(--body-text);
    }
    .contact-icon-box {
      width: 40px;
      height: 40px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .qr-showcase {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 20px;
      background: #fafbfc;
      border-radius: 12px;
      border: 1px dashed var(--primary);
      text-align: center;
    }
    .qr-showcase img {
      max-width: 150px;
      height: auto;
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
      margin-bottom: 12px;
    }
    /* 友情链接与页脚 */
    .friendly-links-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 24px 0;
    }
    .friendly-links-inner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.875rem;
    }
    .friendly-links-label {
      font-weight: 700;
      color: var(--dark-text);
    }
    .friendly-links-inner a {
      color: var(--muted-text);
      transition: var(--transition);
    }
    .friendly-links-inner a:hover {
      color: var(--primary);
    }
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .footer-brand-title span {
      color: var(--accent);
    }
    .footer-heading {
      color: #ffffff;
      font-weight: 700;
      margin-bottom: 16px;
      font-size: 1rem;
    }
    .footer-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-list a {
      color: #94a3b8;
      transition: var(--transition);
    }
    .footer-list a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }
    /* 浮动客服入口 */
    .floating-support {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 99;
      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 12px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      transition: var(--transition);
      position: relative;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }
    .float-qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }
    .float-qr-popup img {
      width: 100%;
      margin-bottom: 6px;
    }
    .float-qr-popup span {
      font-size: 0.75rem;
      color: var(--dark-text);
      font-weight: 600;
    }
    .float-btn:hover .float-qr-popup {
      display: block;
    }
    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 2.3rem;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-4, .faq-grid, .media-card-grid, .contact-container, .workflow-steps {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .score-summary-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .compare-table {
        display: block;
        overflow-x: auto;
      }
    }