:root {
      --primary: #FF3E6C;
      --primary-hover: #E02855;
      --secondary: #00E5FF;
      --accent: #FFE600;
      --dark: #12141D;
      --text-main: #1E222E;
      --text-muted: #5E6578;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(18, 20, 29, 0.04);
      --shadow-md: 0 10px 30px rgba(18, 20, 29, 0.08);
      --shadow-lg: 0 20px 40px rgba(255, 62, 108, 0.12);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 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-light);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--text-main);
      transition: var(--transition);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .logo-wrapper {
      display: flex;
      align-items: center;
      max-height: 44px;
    }
    .logo-wrapper img {
      max-height: 40px;
      width: auto;
      object-fit: contain;
    }
    .ai-page-home-link {
      font-weight: 700;
      color: var(--primary);
      padding: 4px 10px;
      border: 2px solid var(--primary);
      border-radius: 6px;
      background: #FFF0F4;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: #FFF0F4;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--dark);
      color: #FFFFFF !important;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: 8px;
      box-shadow: 3px 3px 0px var(--primary);
      border: 2px solid var(--dark);
    }
    .btn-portal:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--primary);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 2px solid var(--text-main);
      padding: 6px 10px;
      font-weight: bold;
      cursor: pointer;
      border-radius: 6px;
    }

    /* 首屏 Hero (无图，艳色撞色) */
    .hero-section {
      background: linear-gradient(135deg, #FFFFFF 0%, #FFF5F7 60%, #E6FCFF 100%);
      padding: 80px 0 60px;
      border-bottom: 2px solid var(--text-main);
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-tag {
      display: inline-block;
      background: var(--accent);
      color: var(--dark);
      font-weight: 800;
      padding: 6px 18px;
      border-radius: 30px;
      border: 2px solid var(--dark);
      box-shadow: 3px 3px 0px var(--dark);
      margin-bottom: 24px;
      font-size: 0.95rem;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(90deg, var(--primary), #7928CA);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-main-action {
      background: var(--primary);
      color: #FFFFFF !important;
      font-size: 1.15rem;
      font-weight: 800;
      padding: 16px 36px;
      border-radius: 10px;
      border: 2px solid var(--dark);
      box-shadow: 5px 5px 0px var(--dark);
      cursor: pointer;
    }
    .btn-main-action:hover {
      transform: translate(-2px, -2px);
      box-shadow: 7px 7px 0px var(--dark);
      background: var(--primary-hover);
    }
    .btn-sub-action {
      background: #FFFFFF;
      color: var(--dark) !important;
      font-size: 1.15rem;
      font-weight: 800;
      padding: 16px 36px;
      border-radius: 10px;
      border: 2px solid var(--dark);
      box-shadow: 5px 5px 0px var(--secondary);
    }
    .btn-sub-action:hover {
      transform: translate(-2px, -2px);
      box-shadow: 7px 7px 0px var(--secondary);
    }

    /* 纯色几何数据看板 (首屏替代图) */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 24px 16px;
      text-align: center;
      box-shadow: 4px 4px 0px var(--dark);
      transition: var(--transition);
    }
    .stat-card:hover {
      transform: translateY(-4px);
    }
    .stat-card.c1 { border-top: 6px solid var(--primary); }
    .stat-card.c2 { border-top: 6px solid var(--secondary); }
    .stat-card.c3 { border-top: 6px solid var(--accent); }
    .stat-card.c4 { border-top: 6px solid #7928CA; }
    .stat-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      padding: 4px 14px;
      background: #EBF8FF;
      color: #0070F3;
      border: 2px solid var(--dark);
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .service-card {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: 4px 4px 0px var(--dark);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--primary);
    }
    .service-badge {
      display: inline-block;
      align-self: flex-start;
      background: var(--accent);
      color: var(--dark);
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid var(--dark);
      margin-bottom: 14px;
    }
    .service-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 10px;
    }
    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 模型矩阵徽章云 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }
    .model-pill {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      padding: 8px 18px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.95rem;
      box-shadow: 2px 2px 0px var(--dark);
      transition: var(--transition);
    }
    .model-pill:hover {
      background: var(--secondary);
      transform: translateY(-2px);
    }

    /* 流程步骤 */
    .step-card {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 30px 24px;
      text-align: center;
      position: relative;
      box-shadow: 4px 4px 0px var(--dark);
    }
    .step-num {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 1.3rem;
      font-weight: 900;
      border-radius: 50%;
      border: 2px solid var(--dark);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比表格 */
    .compare-container {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      box-shadow: 6px 6px 0px var(--dark);
      overflow-x: auto;
      padding: 24px;
    }
    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #FFF0F4;
      border: 2px solid var(--primary);
      border-radius: 8px;
      padding: 16px 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 12px;
    }
    .rating-score {
      font-size: 1.4rem;
      font-weight: 900;
      color: var(--primary);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F8FAFC;
      font-weight: 800;
      font-size: 1.05rem;
    }
    .highlight-col {
      background: #FFFDF0;
      font-weight: 700;
      color: var(--dark);
    }
    .badge-win {
      background: #00E5FF;
      color: var(--dark);
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 800;
      border: 1px solid var(--dark);
    }

    /* 案例中心 */
    .case-card {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 4px 4px 0px var(--dark);
      display: flex;
      flex-direction: column;
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      border-bottom: 2px solid var(--dark);
      background: #EEE;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .case-body {
      padding: 24px;
      flex-grow: 1;
    }
    .case-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .testimonial-card {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: 4px 4px 0px var(--dark);
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .user-avatar-tag {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent);
      border: 2px solid var(--dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: var(--dark);
    }
    .user-meta h4 {
      font-size: 1rem;
      font-weight: 800;
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .testimonial-text {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: 6px 6px 0px var(--dark);
      max-width: 760px;
      margin: 0 auto;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--dark);
      border-radius: 8px;
      font-size: 1rem;
      background: #FAFAFA;
    }
    .form-control:focus {
      outline: none;
      background: #FFFFFF;
      border-color: var(--primary);
    }
    textarea.form-control {
      min-height: 120px;
      resize: vertical;
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 800;
      padding: 14px;
      border: 2px solid var(--dark);
      border-radius: 8px;
      box-shadow: 4px 4px 0px var(--dark);
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--dark);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 3px 3px 0px var(--dark);
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      transition: background-color 0.2s ease;
    }
    .faq-question:hover {
      background: #FFF5F7;
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.3s ease;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
      border-top: 1px dashed var(--border-color);
      margin-top: 4px;
      padding-top: 16px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 文章与资讯 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .article-card {
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: 4px 4px 0px var(--dark);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .article-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .article-link {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 宣传图展示区 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }
    .banner-item {
      border: 2px solid var(--dark);
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 3px 3px 0px var(--dark);
      background: #EEE;
    }
    .banner-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: var(--dark);
      color: #FFFFFF;
      padding: 60px 0 24px;
      border-top: 4px solid var(--primary);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 16px;
      color: var(--secondary);
    }
    .footer-brand p {
      color: #A0AEC0;
      font-size: 0.9rem;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
      border-left: 3px solid var(--primary);
      padding-left: 8px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #CBD5E0;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: var(--secondary);
    }
    .friend-links-box {
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      margin-bottom: 24px;
    }
    .friend-links-box h5 {
      color: #A0AEC0;
      font-size: 0.9rem;
      margin-bottom: 12px;
    }
    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .friend-links-flex a {
      color: #CBD5E0;
      font-size: 0.85rem;
      background: #1A202C;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #2D3748;
    }
    .friend-links-flex a:hover {
      color: var(--secondary);
      border-color: var(--secondary);
    }
    .footer-bottom {
      text-align: center;
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      color: #718096;
      font-size: 0.85rem;
    }

    /* 悬浮客服面板 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 10px;
    }
    .kefu-btn {
      background: var(--primary);
      color: #FFFFFF;
      border: 2px solid var(--dark);
      padding: 12px 18px;
      border-radius: 30px;
      font-weight: 800;
      font-size: 0.9rem;
      box-shadow: 3px 3px 0px var(--dark);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .kefu-card-pop {
      display: none;
      background: #FFFFFF;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      padding: 16px;
      box-shadow: 4px 4px 0px var(--dark);
      text-align: center;
      width: 180px;
    }
    .kefu-card-pop img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      margin-bottom: 8px;
      display: block;
    }
    .kefu-card-pop p {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--dark);
    }
    .float-kefu:hover .kefu-card-pop {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.1rem; }
      .grid-3, .articles-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-4, .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .banner-gallery { grid-template-columns: repeat(2, 1fr); }
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
    }
    @media (max-width: 640px) {
      .hero-title { font-size: 1.75rem; }
      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .articles-grid, .footer-grid, .banner-gallery {
        grid-template-columns: 1fr;
      }
      .header-actions .btn-portal { display: none; }
      .form-wrapper { padding: 24px 16px; }
      .section-title { font-size: 1.7rem; }
    }