:root {
      --primary-yellow: #fcd535;
      --primary-yellow-hover: #e5bf26;
      --primary-yellow-light: #fff9db;
      --dark-bg: #121214;
      --dark-card: #1a1a1e;
      --body-bg: #fafaf7;
      --text-main: #18191c;
      --text-muted: #5d6069;
      --border-color: #ebebea;
      --border-highlight: #ffdd40;
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      --card-shadow-hover: 0 18px 40px rgba(252, 213, 53, 0.18);
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--primary-yellow);
    }
    .header-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: 40px;
      width: auto;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .brand-name span {
      background: var(--primary-yellow);
      padding: 2px 6px;
      border-radius: 4px;
      margin-left: 4px;
      font-size: 13px;
      font-weight: 700;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      border-radius: 6px;
    }
    .nav-links li a:hover {
      background-color: var(--primary-yellow);
      color: #000;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-yellow);
      color: #121214;
      font-weight: 700;
      font-size: 15px;
      padding: 10px 22px;
      border-radius: 8px;
      border: 2px solid #121214;
      box-shadow: 3px 3px 0px #121214;
      cursor: pointer;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-main:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px #121214;
      background: var(--primary-yellow-hover);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: var(--text-main);
      font-weight: 700;
      font-size: 15px;
      padding: 10px 20px;
      border-radius: 8px;
      border: 2px solid var(--border-color);
      cursor: pointer;
    }
    .btn-outline:hover {
      border-color: #121214;
      background: #fafaf7;
    }

    /* 移动端菜单按钮 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 3px;
      background: var(--text-main);
      margin: 4px 0;
      border-radius: 2px;
    }

    /* 通用分节设计 */
    .section-block {
      padding: 72px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      background: var(--primary-yellow);
      color: #121214;
      font-size: 12px;
      font-weight: 800;
      text-transform: uppercase;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid #121214;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      margin-top: 10px;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Hero 首屏 - 严禁出现图片，采用鲜黄纯粹几何与科技感卡片 */
    .hero-section {
      background: radial-gradient(circle at 10% 20%, #fffde8 0%, #fafaf7 60%);
      padding: 64px 0 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-layout {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1.5px solid #121214;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: 2px 2px 0 #121214;
    }
    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      animation: pulseDot 2s infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: #121214;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title .highlight-box {
      background: var(--primary-yellow);
      padding: 0 8px;
      border-radius: 6px;
      display: inline-block;
      border: 2px solid #121214;
    }
    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .btn-hero-launch {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-yellow);
      color: #121214;
      font-size: 17px;
      font-weight: 800;
      padding: 14px 34px;
      border-radius: 10px;
      border: 2px solid #121214;
      box-shadow: 4px 4px 0 #121214;
      transition: all 0.2s ease;
    }
    .btn-hero-launch:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0 #121214;
      background: var(--primary-yellow-hover);
    }
    .hero-stats-panel {
      background: #ffffff;
      border: 2px solid #121214;
      border-radius: 16px;
      padding: 28px;
      box-shadow: 6px 6px 0 rgba(18, 18, 20, 0.9);
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .stat-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 14px;
    }
    .stat-header-title {
      font-weight: 800;
      font-size: 16px;
    }
    .status-indicator {
      font-size: 12px;
      background: #dcfce7;
      color: #15803d;
      padding: 3px 10px;
      border-radius: 20px;
      font-weight: 700;
    }
    .stat-grid-2x2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .stat-box {
      background: #fafaf7;
      border: 1px solid #ebebea;
      padding: 16px;
      border-radius: 10px;
    }
    .stat-box-num {
      font-size: 26px;
      font-weight: 900;
      color: #121214;
    }
    .stat-box-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 6px;
    }
    .model-pill {
      font-size: 11px;
      background: #f1f1ee;
      padding: 4px 8px;
      border-radius: 4px;
      font-weight: 600;
      color: #333;
    }

    /* 服务能力卡片 (AIGC服务 & 场景) */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .service-card:hover {
      border-color: #121214;
      transform: translateY(-4px);
      box-shadow: 4px 4px 0 #121214;
    }
    .card-icon-tag {
      width: 44px;
      height: 44px;
      background: var(--primary-yellow);
      border: 1.5px solid #121214;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 19px;
      font-weight: 800;
      margin-bottom: 8px;
      color: #121214;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 平台介绍模块 */
    .intro-box {
      background: #ffffff;
      border: 2px solid #121214;
      border-radius: 16px;
      padding: 40px;
      box-shadow: 4px 4px 0 #121214;
    }
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .intro-points {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
      margin-top: 20px;
    }
    .intro-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: #333;
    }
    .intro-points-check {
      background: var(--primary-yellow);
      border: 1px solid #121214;
      color: #121214;
      font-size: 12px;
      font-weight: 900;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .step-card:hover {
      border-color: #121214;
      box-shadow: 3px 3px 0 #121214;
    }
    .step-badge {
      font-size: 12px;
      font-weight: 800;
      background: #121214;
      color: var(--primary-yellow);
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .step-card h4 {
      font-size: 17px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 对比评测 - 突出 9.9 分与五星 */
    .eval-container {
      background: #ffffff;
      border: 2px solid #121214;
      border-radius: 16px;
      padding: 36px;
      box-shadow: 6px 6px 0 #121214;
    }
    .eval-score-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      background: var(--primary-yellow-light);
      border: 1.5px solid #121214;
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 30px;
      gap: 20px;
    }
    .eval-stars-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .eval-stars {
      color: #121214;
      font-size: 22px;
      letter-spacing: 2px;
    }
    .eval-score-num {
      font-size: 38px;
      font-weight: 900;
      color: #121214;
      line-height: 1;
    }
    .eval-table-wrapper {
      overflow-x: auto;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .eval-table th {
      background: #f4f4f0;
      color: #121214;
      font-weight: 800;
      border-top: 1px solid var(--border-color);
    }
    .eval-table .highlight-col {
      background: rgba(252, 213, 53, 0.12);
      font-weight: 700;
      color: #121214;
    }

    /* 案例展示区 */
    .showcase-banner-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 24px;
    }
    .media-card {
      background: #ffffff;
      border: 1.5px solid #121214;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 4px 4px 0 #121214;
      display: flex;
      flex-direction: column;
    }
    .media-card img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-bottom: 1.5px solid #121214;
    }
    .media-card .square-img {
      aspect-ratio: 1 / 1;
    }
    .media-card-body {
      padding: 18px;
      flex-grow: 1;
    }
    .media-card-body h4 {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 6px;
    }
    .media-card-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 客户评论卡片 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .review-card:hover {
      border-color: #121214;
      box-shadow: 3px 3px 0 #121214;
    }
    .review-quote {
      font-size: 14px;
      color: #333;
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-yellow);
      border: 1px solid #121214;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
    }
    .reviewer-info h5 {
      font-size: 14px;
      font-weight: 800;
      color: #121214;
    }
    .reviewer-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 手风琴面板 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: #121214;
      box-shadow: 3px 3px 0 #121214;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      color: #121214;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-icon {
      font-size: 18px;
      font-weight: 800;
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 需求表单与加盟 */
    .form-section-card {
      background: #ffffff;
      border: 2px solid #121214;
      border-radius: 16px;
      padding: 40px;
      box-shadow: 6px 6px 0 #121214;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .form-info h3 {
      font-size: 24px;
      font-weight: 900;
      margin-bottom: 12px;
    }
    .form-info p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 14px;
      font-weight: 600;
    }
    .qr-showcase {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--primary-yellow-light);
      padding: 16px;
      border-radius: 10px;
      border: 1px solid #121214;
    }
    .qr-showcase img {
      width: 80px;
      height: 80px;
      border-radius: 6px;
      border: 1px solid #121214;
    }
    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 700;
      color: #121214;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1.5px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      font-family: inherit;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: #121214;
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 行业资讯 & 最新文章 */
    .articles-block {
      background: #fafaf7;
      border-top: 1px solid var(--border-color);
      padding: 60px 0;
    }
    .article-links-container {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
    }
    .articles-dynamic-badge {
      display: inline-block;
      background: #121214;
      color: var(--primary-yellow);
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .article-url-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }
    .article-url-link {
      background: #f4f4f0;
      padding: 8px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: #121214;
      border: 1px solid #e2e2dc;
    }
    .article-url-link:hover {
      background: var(--primary-yellow);
      border-color: #121214;
    }

    /* 页脚与友情链接 */
    .site-footer {
      background: #18191c;
      color: #e2e2e6;
      padding: 60px 0 30px 0;
      border-top: 4px solid var(--primary-yellow);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
    }
    .footer-brand p {
      font-size: 14px;
      color: #9da0a8;
      line-height: 1.6;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      border-left: 3px solid var(--primary-yellow);
      padding-left: 8px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #9da0a8;
      font-size: 14px;
    }
    .footer-links a:hover {
      color: var(--primary-yellow);
    }
    .friendly-links-wrap {
      border-top: 1px solid #2a2b30;
      padding: 24px 0;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
    }
    .friendly-title {
      font-size: 13px;
      font-weight: 700;
      color: #9da0a8;
    }
    .friendly-links-wrap a {
      font-size: 13px;
      color: #b5b8c0;
      background: #25262c;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friendly-links-wrap a:hover {
      background: var(--primary-yellow);
      color: #121214;
    }
    .footer-bottom {
      border-top: 1px solid #2a2b30;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #7b7e87;
    }

    /* 浮动客服入口 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary-yellow);
      border: 2px solid #121214;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0 #121214;
      cursor: pointer;
      font-weight: 800;
      font-size: 13px;
      color: #121214;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      transform: scale(1.08);
      background: var(--primary-yellow-hover);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-layout, .intro-grid, .form-section-card {
        grid-template-columns: 1fr;
      }
      .card-grid-3, .showcase-banner-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-4, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--primary-yellow);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px;
      }
      .card-grid-3, .card-grid-4, .showcase-banner-grid, .reviews-grid, .flow-steps {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 30px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-action .btn-outline {
        display: none;
      }
    }