:root {
      --primary: #ff4500;
      --secondary: #0a4bf0;
      --accent-yellow: #ffb800;
      --accent-cyan: #00d2d3;
      --dark: #0f172a;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --bg-warm: #fffbf5;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 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 #0f172a;
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
    }

    .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;
      transition: all 0.2s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: #fff1eb;
    }

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

    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: 8px;
      font-weight: 700;
      font-size: 0.95rem;
      border: 2px solid #0f172a;
      box-shadow: 3px 3px 0px #0f172a;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      cursor: pointer;
    }

    .btn-main:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px #0f172a;
    }

    .btn-main:active {
      transform: translate(1px, 1px);
      box-shadow: 2px 2px 0px #0f172a;
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--secondary);
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: 8px;
      font-weight: 700;
      font-size: 0.95rem;
      border: 2px solid #0f172a;
      box-shadow: 3px 3px 0px #0f172a;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      cursor: pointer;
    }

    .btn-secondary:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px #0f172a;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--dark);
      padding: 6px 10px;
      border-radius: 6px;
      font-weight: 800;
      cursor: pointer;
    }

    /* 纯色几何 Hero 首屏 (无图片) */
    .hero-section {
      background: linear-gradient(135deg, #fff7ed 0%, #e0e7ff 50%, #fef08a 100%);
      padding: 80px 0 90px;
      border-bottom: 3px solid var(--dark);
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-block;
      background: #ffde59;
      color: var(--dark);
      padding: 6px 16px;
      border: 2px solid var(--dark);
      box-shadow: 3px 3px 0 var(--dark);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 800;
      margin-bottom: 24px;
      text-transform: uppercase;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: #334155;
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-cta-btn {
      padding: 16px 36px;
      font-size: 1.15rem;
      background: #ff4500;
      color: #ffffff !important;
      border: 3px solid var(--dark);
      box-shadow: 5px 5px 0 var(--dark);
      border-radius: 10px;
      font-weight: 800;
      transition: all 0.2s ease;
    }

    .hero-cta-btn:hover {
      transform: translate(-3px, -3px);
      box-shadow: 8px 8px 0 var(--dark);
      background: #e03d00;
    }

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

    .stat-card {
      background: #ffffff;
      border: 2px solid var(--dark);
      box-shadow: 4px 4px 0 var(--dark);
      border-radius: 10px;
      padding: 20px 16px;
      text-align: center;
    }

    .stat-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--secondary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    .section-padding {
      padding: 80px 0;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: #00d2d3;
      color: var(--dark);
      font-size: 0.85rem;
      font-weight: 800;
      border: 2px solid var(--dark);
      box-shadow: 2px 2px 0 var(--dark);
      border-radius: 6px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-box {
      background: #ffffff;
      border: 3px solid var(--dark);
      box-shadow: 6px 6px 0 var(--dark);
      border-radius: var(--radius);
      padding: 36px;
    }

    .intro-box h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--dark);
    }

    .intro-box p {
      margin-bottom: 16px;
      color: #334155;
      font-size: 1rem;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-chip {
      background: #f1f5f9;
      border: 1.5px solid var(--dark);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--dark);
    }

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

    .service-card {
      background: #ffffff;
      border: 2px solid var(--dark);
      border-radius: var(--radius);
      box-shadow: 4px 4px 0 var(--dark);
      padding: 28px 24px;
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 6px 6px 0 var(--dark);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      border: 2px solid var(--dark);
      background: #ffde59;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 18px;
    }

    .service-card:nth-child(2n) .service-icon {
      background: #00d2d3;
    }

    .service-card:nth-child(3n) .service-icon {
      background: #ff7675;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--dark);
    }

    .service-card p {
      font-size: 0.95rem;
      color: #475569;
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .case-card {
      background: #ffffff;
      border: 2px solid var(--dark);
      box-shadow: 5px 5px 0 var(--dark);
      border-radius: var(--radius);
      overflow: hidden;
    }

    .case-img-wrap {
      width: 100%;
      background: #e2e8f0;
      border-bottom: 2px solid var(--dark);
    }

    .case-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .case-info {
      padding: 24px;
    }

    .case-info h3 {
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 10px;
    }

    /* 对比评测卡片 */
    .compare-section {
      background: #fff8eb;
      border-top: 2px solid var(--dark);
      border-bottom: 2px solid var(--dark);
    }

    .rating-badge-card {
      background: var(--dark);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      margin-bottom: 36px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      border: 3px solid #ffde59;
    }

    .rating-item {
      text-align: center;
    }

    .rating-score {
      font-size: 2.6rem;
      font-weight: 900;
      color: #ffde59;
      line-height: 1;
    }

    .rating-label {
      font-size: 0.95rem;
      margin-top: 6px;
      color: #e2e8f0;
    }

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 2px solid var(--dark);
      box-shadow: 5px 5px 0 var(--dark);
      border-radius: var(--radius);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .compare-table th, .compare-table td {
      padding: 18px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #f8fafc;
      color: var(--dark);
      font-weight: 800;
    }

    .compare-table tr:hover {
      background: #fffdf5;
    }

    .highlight-cell {
      font-weight: 800;
      color: var(--primary);
    }

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

    .process-card {
      background: #ffffff;
      border: 2px solid var(--dark);
      box-shadow: 4px 4px 0 var(--dark);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
    }

    .process-step {
      font-size: 2rem;
      font-weight: 900;
      color: var(--accent-cyan);
      margin-bottom: 8px;
    }

    .process-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .process-card p {
      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: #ffffff;
      border: 2px solid var(--dark);
      box-shadow: 4px 4px 0 var(--dark);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 0.95rem;
      color: #334155;
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #0a4bf0;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      border: 2px solid var(--dark);
    }

    .reviewer-name {
      font-weight: 800;
      font-size: 0.95rem;
      color: var(--dark);
    }

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

    /* 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);
      box-shadow: 3px 3px 0 var(--dark);
      border-radius: 10px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }

    .faq-question:hover {
      background: #fdfdfd;
    }

    .faq-toggle {
      font-size: 1.25rem;
      font-weight: 900;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      padding: 16px 24px 20px;
      max-height: 200px;
      border-top: 1px solid var(--border-color);
    }

    .faq-item.active .faq-toggle {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 表单与联络板块 */
    .form-section {
      background: #eef2ff;
      border-top: 2px solid var(--dark);
      border-bottom: 2px solid var(--dark);
    }

    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: flex-start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 3px solid var(--dark);
      box-shadow: 5px 5px 0 var(--dark);
      border-radius: var(--radius);
      padding: 32px;
    }

    .contact-item {
      margin-bottom: 18px;
      font-size: 1rem;
      color: var(--text-main);
    }

    .contact-item strong {
      color: var(--dark);
    }

    .qr-box {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      background: #f8fafc;
      padding: 16px;
      border: 2px solid var(--dark);
      border-radius: 8px;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
    }

    .form-box {
      background: #ffffff;
      border: 3px solid var(--dark);
      box-shadow: 6px 6px 0 var(--dark);
      border-radius: var(--radius);
      padding: 36px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--dark);
      border-radius: 6px;
      font-size: 0.95rem;
      outline: none;
      background: #fff;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.2);
    }

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

    /* 资讯与友情链接 */
    .article-links, .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .article-links a, .friendly-links a {
      background: #ffffff;
      border: 1.5px solid var(--dark);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark);
      transition: all 0.15s ease;
    }

    .article-links a:hover, .friendly-links a:hover {
      background: var(--primary);
      color: #ffffff;
    }

    /* 底部通用规范 */
    .site-footer {
      background: #ffffff;
      color: var(--text-main);
      border-top: 2px solid var(--dark);
      padding: 60px 0 30px;
    }

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

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 悬浮客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary);
      color: #fff;
      border: 2px solid var(--dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0 var(--dark);
      font-weight: 900;
      font-size: 0.8rem;
      cursor: pointer;
      text-align: center;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .services-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid, .hero-stat-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .contact-wrapper, .case-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--dark);
        padding: 20px;
        gap: 10px;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 1.8rem;
      }
      .services-grid, .reviews-grid, .process-grid, .hero-stat-grid {
        grid-template-columns: 1fr;
      }
      .rating-badge-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }