:root {
      --primary: #5c3cf6;
      --primary-hover: #482be0;
      --accent-yellow: #ffd028;
      --accent-pink: #ff4e78;
      --accent-cyan: #00d2b4;
      --accent-orange: #ff7a00;
      --bg-light: #fbf9f5;
      --card-bg: #ffffff;
      --border-dark: #1e1b2e;
      --text-main: #1e1b2e;
      --text-muted: #5e5b70;
      --shadow-solid: 4px 4px 0px #1e1b2e;
      --shadow-hover: 6px 6px 0px #1e1b2e;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.2s 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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-light);
      background-image: radial-gradient(#dcd5c9 1px, transparent 1px);
      background-size: 24px 24px;
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 涂鸦风格通用卡片与按钮 */
    .doodle-box {
      background: var(--card-bg);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      transition: var(--transition);
      position: relative;
    }

    .doodle-box:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-solid);
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0px var(--border-dark);
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
    }

    .btn-accent {
      background: var(--accent-yellow);
      color: var(--text-main);
    }

    .btn-pink {
      background: var(--accent-pink);
      color: #ffffff;
    }

    .btn-cyan {
      background: var(--accent-cyan);
      color: var(--text-main);
    }

    .badge {
      display: inline-block;
      padding: 4px 10px;
      font-size: 0.8rem;
      font-weight: 700;
      border-radius: 6px;
      border: 2px solid var(--border-dark);
      margin-bottom: 8px;
      background: var(--accent-yellow);
      color: var(--text-main);
    }

    /* 页面头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(251, 249, 245, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-dark);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .nav-brand-text {
      font-size: 1.3rem;
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      color: var(--text-main);
    }

    .nav-links li a:hover {
      background: #eee8db;
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      font-weight: 700;
    }

    /* 通用Section */
    .section {
      padding: 70px 0;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 12px;
      line-height: 1.3;
    }

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

    /* Hero 首屏 (严禁图片) */
    .hero-section {
      padding: 60px 0 80px 0;
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.35rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-tagline {
      display: inline-block;
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      padding: 4px 12px;
      font-weight: 800;
      font-size: 0.9rem;
      border-radius: 20px;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .hero-tag-item {
      font-size: 0.82rem;
      font-weight: 700;
      background: #ffffff;
      border: 1.5px solid var(--border-dark);
      padding: 4px 10px;
      border-radius: 6px;
    }

    /* 首屏纯CSS科技涂鸦面板 (无图片) */
    .hero-visual-card {
      background: #ffffff;
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: 6px 6px 0px var(--border-dark);
      padding: 24px;
      position: relative;
    }

    .visual-top-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 2px dashed var(--border-dark);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }

    .dots-group {
      display: flex;
      gap: 6px;
    }

    .dot-circle {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 1.5px solid var(--border-dark);
    }

    .dot-1 { background: var(--accent-pink); }
    .dot-2 { background: var(--accent-yellow); }
    .dot-3 { background: var(--accent-cyan); }

    .model-stream {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 16px;
    }

    .model-chip {
      background: #f7f5ed;
      border: 1.5px solid var(--border-dark);
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .live-indicator {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    }

    .console-box {
      background: #1e1b2e;
      color: #00ffaa;
      border-radius: var(--radius-sm);
      padding: 14px;
      font-family: monospace;
      font-size: 0.85rem;
      line-height: 1.5;
    }

    /* 数据指标栏 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -20px;
      margin-bottom: 40px;
    }

    .metric-card {
      padding: 20px;
      text-align: center;
    }

    .metric-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* 服务能力卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .service-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin: 8px 0 10px 0;
    }

    .service-card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    /* 模型矩阵胶囊展示 */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 28px;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-solid);
    }

    .model-tag {
      background: #fdfaf0;
      border: 1.5px solid var(--border-dark);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 700;
      box-shadow: 2px 2px 0px var(--border-dark);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--accent-yellow);
      transform: translateY(-2px);
    }

    /* 流程步骤 */
    .steps-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      padding: 24px;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      position: relative;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border: 2px solid var(--border-dark);
      background: var(--accent-cyan);
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 案例中心图文展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .case-media-wrap {
      border-bottom: 2px solid var(--border-dark);
      background: #f0ece1;
      aspect-ratio: 16 / 10;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .case-media-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    /* 对比评测表格与卡片 */
    .rating-highlight {
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-solid);
    }

    .rating-score {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
      color: var(--text-main);
    }

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

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1.5px solid #eee;
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #f8f6ed;
      font-weight: 800;
      border-bottom: 2px solid var(--border-dark);
    }

    .compare-table tr:hover td {
      background: #faf8f2;
    }

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

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

    .review-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1.5px dashed #e2decb;
    }

    .user-avatar-tag {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent-pink);
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
    }

    /* 需求表单与联系 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
    }

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

    .form-label {
      display: block;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      background: #fff;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      box-shadow: 3px 3px 0px var(--border-dark);
      background: #fffef9;
    }

    .contact-info-panel {
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-card {
      display: flex;
      align-items: center;
      gap: 20px;
      background: #fdfbf7;
      border: 2px solid var(--border-dark);
      padding: 16px;
      border-radius: var(--radius-sm);
      margin-top: 16px;
    }

    .qr-card img {
      width: 100px;
      height: 100px;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
    }

    /* FAQ 手风琴 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      background: #faf7ef;
    }

    .faq-icon {
      font-weight: 900;
      font-size: 1.2rem;
      transition: var(--transition);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fdfcf9;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      border-top: 1.5px dashed var(--border-dark);
    }

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

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 行业资讯与文章列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-bottom: 24px;
    }

    .article-item-link {
      padding: 14px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 0.92rem;
    }

    .article-item-link:hover {
      background: var(--accent-yellow);
    }

    /* 友情链接与页脚 */
    .links-bar {
      padding: 24px;
      background: #f2eee3;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      margin-top: 40px;
    }

    .links-title {
      font-weight: 800;
      font-size: 0.95rem;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .links-flex a {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      padding: 4px 12px;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
    }

    .links-flex a:hover {
      background: var(--accent-cyan);
    }

    .site-footer {
      background: #1e1b2e;
      color: #ffffff;
      padding: 50px 0 30px 0;
      border-top: 3px solid var(--border-dark);
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--accent-yellow);
    }

    .footer-col p, .footer-col li {
      font-size: 0.9rem;
      color: #b0aec2;
      line-height: 1.8;
      list-style: none;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #8c89a0;
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      background: var(--accent-yellow);
      box-shadow: var(--shadow-solid);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.08);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-grid { grid-template-columns: 1fr; }
      .metrics-bar { grid-template-columns: repeat(2, 1fr); }
      .steps-timeline { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fbf9f5;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .hero-content h1 {
        font-size: 1.8rem;
      }
      .metrics-bar {
        grid-template-columns: 1fr;
      }
      .steps-timeline {
        grid-template-columns: 1fr;
      }
    }