:root {
      --bg-cream: #FFFDF9;
      --bg-card: #FFFFFF;
      --text-main: #18191F;
      --text-sub: #474A57;
      --text-muted: #6B7280;
      --color-yellow: #FFD233;
      --color-coral: #FF5A5F;
      --color-cyan: #2CD6B7;
      --color-purple: #8C52FF;
      --color-blue: #2A75D3;
      --border-dark: #18191F;
      --shadow-offset: 4px 4px 0px #18191F;
      --shadow-hover: 6px 6px 0px #18191F;
      --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;
      -webkit-tap-highlight-color: transparent;
    }
    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-cream);
      background-image: radial-gradient(var(--border-dark) 0.75px, transparent 0.75px);
      background-size: 20px 20px;
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    .site-container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #FFFDF9;
      border-bottom: 3px solid var(--border-dark);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 900;
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-weight: 700;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
    }
    .nav-links li a:hover {
      background: var(--color-yellow);
      transform: translateY(-2px);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-doodle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      background: var(--color-yellow);
      box-shadow: 3px 3px 0 var(--border-dark);
      cursor: pointer;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    .btn-doodle:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0 var(--border-dark);
    }
    .btn-doodle.coral {
      background: var(--color-coral);
      color: #fff;
    }
    .btn-doodle.cyan {
      background: var(--color-cyan);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 2px solid var(--border-dark);
      padding: 6px 10px;
      font-weight: 800;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 64px 0 50px;
      position: relative;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 14px;
      background: var(--color-cyan);
      border: 2px solid var(--border-dark);
      border-radius: 30px;
      font-weight: 800;
      font-size: 0.85rem;
      box-shadow: 2px 2px 0 var(--border-dark);
      margin-bottom: 16px;
    }
    .hero-title {
      font-size: 2.3rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-title span {
      background: linear-gradient(120deg, var(--color-yellow) 0%, var(--color-coral) 100%);
      padding: 2px 8px;
      border-radius: 6px;
      border: 2px solid var(--border-dark);
      display: inline-block;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      margin-bottom: 28px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }
    .hero-portal-btn {
      font-size: 1.1rem;
      padding: 12px 28px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-offset);
      text-align: center;
    }
    .metric-val {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--color-coral);
    }
    .metric-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-sub);
    }
    /* 首屏纯CSS图形面板 */
    .hero-graphic-box {
      background: #FFFFFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-hover);
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
      position: relative;
    }
    .doodle-tag {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--color-purple);
      color: #fff;
      font-weight: 800;
      font-size: 0.75rem;
      padding: 4px 10px;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .terminal-header {
      display: flex;
      gap: 8px;
      padding-bottom: 12px;
      border-bottom: 2px dashed var(--border-dark);
    }
    .dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
    }
    .dot-1 { background: var(--color-coral); }
    .dot-2 { background: var(--color-yellow); }
    .dot-3 { background: var(--color-cyan); }
    .terminal-body {
      font-family: monospace;
      font-size: 0.88rem;
      line-height: 1.6;
      background: #F8F9FA;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
    }
    .terminal-line {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }
    .terminal-line:last-child {
      margin-bottom: 0;
    }
    .badge-pill {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--border-dark);
      font-weight: 700;
    }
    /* 公共模块标题 */
    .section-block {
      padding: 56px 0;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 40px;
    }
    .section-kicker {
      display: inline-block;
      font-weight: 800;
      font-size: 0.85rem;
      background: var(--color-yellow);
      border: 2px solid var(--border-dark);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .section-title {
      font-size: 1.9rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-sub);
    }
    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .intro-card {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-offset);
      transition: var(--transition);
    }
    .intro-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .intro-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .intro-card h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
    }
    .intro-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
    }
    /* 模型生态标签云 */
    .model-cloud-box {
      background: #FFFFFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-offset);
      margin-top: 30px;
    }
    .cloud-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .cloud-item {
      padding: 6px 14px;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 800;
      background: #F4F5F7;
      transition: var(--transition);
    }
    .cloud-item:hover {
      background: var(--color-coral);
      color: #FFF;
      transform: scale(1.05);
    }
    /* AIGC 服务矩阵卡片 */
    .service-matrix {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-offset);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
    }
    .card-badge {
      font-size: 0.7rem;
      font-weight: 800;
      padding: 2px 8px;
      border: 1.5px solid var(--border-dark);
      border-radius: 4px;
      background: var(--color-cyan);
    }
    .service-card h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.5;
    }
    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-box {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-offset);
      position: relative;
    }
    .step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--color-coral);
      color: #FFF;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      margin-bottom: 12px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .step-box h3 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-box p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }
    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }
    .case-card {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-offset);
    }
    .case-media {
      width: 100%;
      border-bottom: 2px solid var(--border-dark);
      background: #EAEAEA;
    }
    .case-media img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .case-content {
      padding: 20px;
    }
    .case-content h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .case-content p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
    }
    .case-sub-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }
    .case-sub-card {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 16px;
      display: flex;
      gap: 16px;
      box-shadow: var(--shadow-offset);
      align-items: center;
    }
    .case-sub-card img {
      width: 90px;
      height: 90px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
    }
    /* 评测与比价 */
    .eval-score-card {
      background: #FFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-hover);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 30px;
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-circle {
      width: 76px;
      height: 76px;
      border-radius: 50%;
      background: var(--color-yellow);
      border: 3px solid var(--border-dark);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0 var(--border-dark);
    }
    .score-num {
      font-size: 1.7rem;
      font-weight: 900;
      line-height: 1;
    }
    .score-max {
      font-size: 0.75rem;
      font-weight: 800;
    }
    .stars-box {
      font-size: 1.4rem;
      color: #E67A00;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-offset);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    .custom-table th, .custom-table td {
      padding: 14px 18px;
      border-bottom: 2px solid var(--border-dark);
    }
    .custom-table th {
      background: #F4F5F7;
      font-weight: 800;
      font-size: 0.95rem;
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-col {
      background: #FFFDF0;
      font-weight: 700;
    }
    /* 资讯与动态文章 */
    .article-container {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-offset);
      margin-bottom: 24px;
    }
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }
    .art-btn {
      display: inline-block;
      padding: 8px 16px;
      border: 2px solid var(--border-dark);
      background: var(--bg-cream);
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 0.85rem;
      box-shadow: 2px 2px 0 var(--border-dark);
      transition: var(--transition);
    }
    .art-btn:hover {
      background: var(--color-yellow);
      transform: translateY(-2px);
    }
    /* 客户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }
    .review-card {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-offset);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .review-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      background: var(--color-cyan);
    }
    .review-role {
      font-size: 0.85rem;
      color: var(--text-sub);
      font-weight: 700;
    }
    .review-text {
      font-size: 0.92rem;
      line-height: 1.6;
      color: var(--text-main);
    }
    /* FAQ 折叠 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #FFF;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0 var(--border-dark);
      overflow: hidden;
    }
    .faq-question {
      padding: 16px 20px;
      font-weight: 800;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #FFF;
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.2s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 20px;
      background: #FDFDFD;
      border-top: 1px dashed transparent;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 14px 20px 18px;
      border-top: 1px dashed var(--border-dark);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* 宣传图画廊展示区 */
    .banner-display-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }
    .banner-display-grid img {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-offset);
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    /* 表单与联系区 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 30px;
    }
    .form-card {
      background: #FFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-offset);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      background: #FAFBFD;
      transition: var(--transition);
      font-family: inherit;
    }
    .form-control:focus {
      background: #FFF;
      box-shadow: 2px 2px 0 var(--border-dark);
    }
    .info-card {
      background: #FFF;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-offset);
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .qr-block {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #F8F9FA;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
    }
    .qr-block img {
      width: 100px;
      height: 100px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
    }
    /* 友情链接 */
    .links-section {
      background: #F6F8FA;
      border-top: 2px solid var(--border-dark);
      padding: 30px 0;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }
    .friend-links a {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-sub);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px dashed var(--border-dark);
      background: #FFF;
      transition: var(--transition);
    }
    .friend-links a:hover {
      background: var(--color-yellow);
      color: var(--text-main);
    }
    /* 页脚 */
    .site-footer {
      background: #18191F;
      color: #FFF;
      border-top: 3px solid var(--border-dark);
      padding: 40px 0 24px;
    }
    .footer-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid #333;
    }
    .footer-copy {
      font-size: 0.85rem;
      color: #9CA3AF;
      text-align: center;
      margin-top: 20px;
    }
    .footer-copy a {
      color: #FFF;
      text-decoration: underline;
    }
    /* 浮动操作悬窗 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      background: var(--color-yellow);
      box-shadow: 2px 2px 0 var(--border-dark);
      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(1.1);
    }
    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .contact-layout {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFF;
        border-bottom: 3px solid var(--border-dark);
        flex-direction: column;
        padding: 16px;
      }
      .nav-links.show {
        display: flex;
      }
      .hero-title {
        font-size: 1.7rem;
      }
      .banner-display-grid {
        grid-template-columns: 1fr;
      }
    }