:root {
      --primary: #4361ee;
      --primary-hover: #3730a3;
      --accent-pink: #f72585;
      --accent-yellow: #ffb703;
      --accent-cyan: #4cc9f0;
      --accent-green: #06d6a0;
      --ink: #1e1b4b;
      --muted: #4b5563;
      --light-bg: #fffdf9;
      --card-bg: #ffffff;
      --border-dark: #1e1b4b;
      --shadow-hard: 4px 4px 0px #1e1b4b;
      --shadow-hard-lg: 6px 6px 0px #1e1b4b;
      --radius: 14px;
      --container-max: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--light-bg);
      background-image: radial-gradient(#e0e7ff 1.2px, transparent 1.2px);
      background-size: 24px 24px;
      color: var(--ink);
      line-height: 1.6;
      overflow-x: hidden;
      padding-bottom: 0;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 头部与导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 253, 249, 0.95);
      border-bottom: 2px solid var(--border-dark);
      backdrop-filter: blur(8px);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 44px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--ink);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--ink);
      padding: 8px 14px;
      border-radius: 8px;
      transition: all 0.2s ease;
      display: block;
    }
    .nav-links li a:hover {
      background-color: #fef08a;
      transform: translateY(-1px);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-doodle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 800;
      background-color: var(--accent-yellow);
      color: var(--ink);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      box-shadow: var(--shadow-hard);
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      white-space: nowrap;
    }
    .btn-doodle:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hard-lg);
    }
    .btn-doodle:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0px var(--border-dark);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
    }
    .btn-accent {
      background-color: var(--accent-pink);
      color: #ffffff;
    }
    .mobile-menu-btn {
      display: none;
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 8px;
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
    }

    /* 模块通用样式 */
    section {
      padding: 64px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      background-color: #e0e7ff;
      border: 2px solid var(--border-dark);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      box-shadow: 2px 2px 0px var(--border-dark);
      transform: rotate(-1deg);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--ink);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 80% 20%, #ffe4e6 0%, transparent 40%),
                  radial-gradient(circle at 20% 80%, #dbeafe 0%, transparent 40%);
    }
    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }
    .hero-tag-wrap {
      margin-bottom: 20px;
    }
    .hero-badge {
      display: inline-block;
      font-size: 0.9rem;
      font-weight: 800;
      padding: 6px 16px;
      border: 2px solid var(--border-dark);
      border-radius: 30px;
      background: #ffc6ff;
      box-shadow: 3px 3px 0px var(--border-dark);
      transform: rotate(-1.5deg);
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--ink);
    }
    .hero-title span {
      background: linear-gradient(180deg, transparent 65%, #fde047 65%);
      padding: 0 4px;
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: #334155;
      font-weight: 500;
      margin-bottom: 36px;
      line-height: 1.6;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 44px;
    }
    .btn-hero {
      padding: 14px 34px;
      font-size: 1.15rem;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 10px;
    }
    .metric-card {
      background: var(--card-bg);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 20px 16px;
      box-shadow: var(--shadow-hard);
      text-align: center;
      transition: transform 0.2s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
    }
    .metric-val {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .metric-lbl {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--muted);
    }

    /* 平台介绍 */
    .about-box {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 18px;
      padding: 40px;
      box-shadow: var(--shadow-hard-lg);
    }
    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }
    .about-item {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      background: #faf5ff;
    }
    .about-item:nth-child(2) { background: #f0fdf4; }
    .about-item:nth-child(3) { background: #eff6ff; }
    .about-item h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      font-weight: 800;
    }
    .about-item p {
      font-size: 0.95rem;
      color: #475569;
    }

    /* 模型矩阵徽章云 */
    .models-marquee-wrap {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-hard);
      margin-top: 24px;
    }
    .models-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-chip {
      background: #f8fafc;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 0.88rem;
      font-weight: 700;
      box-shadow: 2px 2px 0px var(--border-dark);
      transition: all 0.15s ease;
    }
    .model-chip:hover {
      background: #fef08a;
      transform: translateY(-2px);
    }

    /* AIGC 服务卡片 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-bg);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-hard);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hard-lg);
    }
    .card-top {
      margin-bottom: 16px;
    }
    .card-pill {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 10px;
      border: 1.5px solid var(--border-dark);
      border-radius: 12px;
      margin-bottom: 10px;
      background: #e0e7ff;
    }
    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--muted);
      line-height: 1.55;
    }

    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px 20px;
      box-shadow: var(--shadow-hard);
      position: relative;
    }
    .step-badge {
      display: inline-block;
      width: 38px;
      height: 38px;
      line-height: 34px;
      text-align: center;
      background: #ffb703;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      font-weight: 900;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.9rem;
      color: var(--muted);
    }

    /* 案例图片排版 */
    .cases-gallery {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 32px;
    }
    .case-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-hard);
    }
    .case-img-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      border-bottom: 2px solid var(--border-dark);
      overflow: hidden;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .case-meta {
      padding: 18px;
    }
    .case-meta h3 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .case-meta p {
      font-size: 0.9rem;
      color: var(--muted);
    }
    .cases-secondary {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }
    .case-sm {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-hard);
    }
    .case-sm-img {
      width: 100%;
      aspect-ratio: 4 / 3;
      border-bottom: 2px solid var(--border-dark);
    }
    .case-sm-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .case-sm-content {
      padding: 14px;
    }

    /* 对比评测卡片与表格 */
    .compare-container {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 18px;
      padding: 36px;
      box-shadow: var(--shadow-hard-lg);
    }
    .score-summary {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      background: #fdf2f8;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px 30px;
      margin-bottom: 30px;
    }
    .score-left h3 {
      font-size: 1.35rem;
      font-weight: 900;
      margin-bottom: 6px;
    }
    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }
    .score-badge {
      display: flex;
      align-items: baseline;
      gap: 6px;
      background: #ffb703;
      border: 2px solid var(--border-dark);
      padding: 10px 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-hard);
    }
    .score-num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--ink);
    }
    .score-total {
      font-size: 1.1rem;
      font-weight: 800;
      color: #4b5563;
    }
    .table-scroll-wrap {
      overflow-x: auto;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 640px;
      background: #fff;
    }
    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #f1f5f9;
      font-weight: 800;
      color: var(--ink);
      border-bottom: 2px solid var(--border-dark);
    }
    .compare-table tr:hover td {
      background-color: #f8fafc;
    }
    .compare-table td.highlight {
      background-color: #fefce8;
      font-weight: 700;
      color: var(--primary);
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-hard);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-card p {
      font-size: 0.92rem;
      color: #334155;
      font-style: italic;
      margin-bottom: 18px;
    }
    .client-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1.5px dashed #cbd5e1;
      padding-top: 14px;
    }
    .client-avatar {
      width: 44px;
      height: 44px;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      background: #e0e7ff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1rem;
    }
    .client-detail h4 {
      font-size: 0.95rem;
      font-weight: 800;
    }
    .client-detail span {
      font-size: 0.8rem;
      color: var(--muted);
    }

    /* FAQ 折叠面板 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      box-shadow: var(--shadow-hard);
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-toggle {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      outline: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--ink);
      text-align: left;
    }
    .faq-toggle span.icon {
      font-size: 1.3rem;
      transition: transform 0.25s ease;
      font-weight: 400;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      font-size: 0.95rem;
      color: var(--muted);
      border-top: 0px solid #e2e8f0;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 14px 24px 20px;
      border-top: 1px solid #e2e8f0;
    }
    .faq-item.active .faq-toggle span.icon {
      transform: rotate(45deg);
    }

    /* 需求匹配与表单 */
    .contact-container {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 18px;
      padding: 40px;
      box-shadow: var(--shadow-hard-lg);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .form-pane h3 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .form-pane p {
      font-size: 0.92rem;
      color: var(--muted);
      margin-bottom: 24px;
    }
    .doodle-form .form-group {
      margin-bottom: 16px;
    }
    .doodle-form label {
      display: block;
      font-size: 0.9rem;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .doodle-form input,
    .doodle-form select,
    .doodle-form textarea {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-dark);
      border-radius: 10px;
      font-size: 0.95rem;
      background: #f8fafc;
      outline: none;
      transition: border-color 0.2s ease, background 0.2s ease;
    }
    .doodle-form input:focus,
    .doodle-form select:focus,
    .doodle-form textarea:focus {
      border-color: var(--primary);
      background: #fff;
    }
    .contact-info-pane {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border-left: 2px dashed #cbd5e1;
      padding-left: 40px;
    }
    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 24px;
    }
    .contact-info-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
    }
    .contact-info-list strong {
      min-width: 70px;
      display: inline-block;
    }
    .qr-box {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 16px;
      background: #faf5ff;
      text-align: center;
      width: fit-content;
    }
    .qr-box img {
      width: 130px;
      height: 130px;
      object-fit: cover;
      display: block;
      margin: 0 auto 8px;
      border: 1px solid var(--border-dark);
      border-radius: 8px;
    }

    /* 行业资讯文章条目 */
    .article-links-wrap {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-hard);
      margin-top: 24px;
    }
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 14px;
      list-style: none;
    }
    .article-list li a {
      display: block;
      padding: 10px 14px;
      background: #f8fafc;
      border: 1.5px solid var(--border-dark);
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--ink);
      transition: all 0.2s ease;
      text-overflow: ellipsis;
      overflow: hidden;
      white-space: nowrap;
    }
    .article-list li a:hover {
      background: #fed7aa;
      transform: translateY(-2px);
    }

    /* 底部收尾模块 */
    footer.site-footer {
      background-color: #ffffff;
      border-top: 2px solid var(--border-dark);
      padding: 48px 0 24px;
      color: var(--ink);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 36px;
    }
    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 900;
      margin-bottom: 16px;
    }
    .footer-col p {
      font-size: 0.9rem;
      color: var(--muted);
      line-height: 1.6;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links li a {
      font-size: 0.9rem;
      color: var(--muted);
      transition: color 0.2s ease;
    }
    .footer-links li a:hover {
      color: var(--primary);
    }
    .friendly-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friendly-links-flex a {
      font-size: 0.85rem;
      color: var(--muted);
      background: #f1f5f9;
      padding: 4px 10px;
      border-radius: 6px;
      border: 1px solid #cbd5e1;
      transition: all 0.15s ease;
    }
    .friendly-links-flex a:hover {
      background: #e2e8f0;
      color: var(--ink);
    }
    .footer-bottom {
      border-top: 1px solid #e2e8f0;
      padding-top: 24px;
      text-align: center;
      font-size: 0.88rem;
      color: var(--muted);
    }

    /* 浮动操作栏 */
    .floating-bar {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #fff;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-hard);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      transition: transform 0.15s ease;
      color: var(--ink);
    }
    .float-btn:hover {
      transform: scale(1.08);
      background: #fef08a;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .grid-cards,
      .about-grid,
      .steps-wrapper,
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .contact-info-pane {
        border-left: none;
        border-top: 2px dashed #cbd5e1;
        padding-left: 0;
        padding-top: 30px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #fffdf9;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .grid-cards,
      .about-grid,
      .steps-wrapper,
      .testimonials-grid,
      .cases-gallery,
      .cases-secondary {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }