:root {
      --primary-color: #ff3366;
      --secondary-color: #7928ca;
      --accent-color: #0070f3;
      --warning-color: #ff9900;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #ff3366;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(121, 40, 202, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(255, 51, 102, 0.12);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      --max-width: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

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

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

    .brand-badge {
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 999px;
      display: inline-block;
    }

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

    .nav-links li a {
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 8px 14px;
      display: block;
      transition: color 0.2s ease;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 700;
      text-decoration: none;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-gradient {
      background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 51, 102, 0.35);
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 51, 102, 0.45);
    }

    .btn-outline {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background: transparent;
    }

    .btn-outline:hover {
      background: rgba(255, 51, 102, 0.06);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero：严禁使用任何图片，以艳色渐变几何与排版呈现 */
    .hero-section {
      position: relative;
      padding: 85px 0 65px;
      background: radial-gradient(circle at 10% 20%, rgba(255, 51, 102, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 112, 243, 0.08) 0%, transparent 40%),
                  linear-gradient(180deg, #ffffff 0%, var(--bg-main) 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(255, 51, 102, 0.1);
      border: 1px solid rgba(255, 51, 102, 0.25);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-color);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 900;
      color: #111827;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .text-pop-gradient {
      background: linear-gradient(135deg, #ff3366 0%, #7928ca 50%, #0070f3 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-hero-official {
      background: linear-gradient(135deg, #ff3366, #ff0055);
      color: #ffffff;
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(255, 0, 85, 0.4);
      animation: pulse-glow 2.5s infinite;
    }

    @keyframes pulse-glow {
      0% { box-shadow: 0 0 0 0 rgba(255, 51, 102, 0.5); }
      70% { box-shadow: 0 0 0 16px rgba(255, 51, 102, 0); }
      100% { box-shadow: 0 0 0 0 rgba(255, 51, 102, 0); }
    }

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

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 22px 16px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, border-color 0.25s ease;
      text-align: center;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--secondary-color);
    }

    .metric-value {
      font-size: 2rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 600;
    }

    /* 章节通用样式 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 54px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--primary-color);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 12px;
      line-height: 1.35;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 关于我们与平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 1.6rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 16px;
    }

    .about-text p {
      color: var(--text-muted);
      margin-bottom: 18px;
      font-size: 0.98rem;
    }

    .badge-features {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .badge-item {
      background: #f1f5f9;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .media-card-wrap {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 12px;
      box-shadow: var(--shadow-md);
    }

    .media-card-wrap img {
      width: 100%;
      height: auto;
      border-radius: 12px;
      display: block;
      object-fit: cover;
    }

    /* AIGC 服务矩阵卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      border-color: var(--primary-color);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(255,51,102,0.1), rgba(121,40,202,0.1));
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 行业方案与场景工坊 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: border-color 0.2s ease;
    }

    .scene-card:hover {
      border-color: var(--secondary-color);
    }

    .scene-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--secondary-color);
      background: rgba(121, 40, 202, 0.08);
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .scene-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 8px;
    }

    .scene-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 多模型聚合标签云 */
    .models-stream-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      margin-top: 30px;
    }

    .models-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 20px;
    }

    .model-chip {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 0.88rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--text-main);
      color: #ffffff;
      border-color: var(--text-main);
    }

    /* 标准制作流程 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px 22px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .flow-num {
      font-size: 2.5rem;
      font-weight: 900;
      color: rgba(255, 51, 102, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }

    .flow-step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 8px;
    }

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

    /* 案例中心展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-container {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #e2e8f0;
    }

    .case-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-container img {
      transform: scale(1.04);
    }

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #111827;
    }

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测表格板块 */
    .rating-header-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff1f4, #f5f3ff);
      border: 1px solid rgba(255, 51, 102, 0.2);
      border-radius: 14px;
      padding: 24px 32px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-item-label {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .score-badge {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary-color);
    }

    .stars {
      color: #ff9900;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #111827;
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .cell-highlight {
      background: rgba(255, 51, 102, 0.04);
      font-weight: 700;
      color: var(--primary-color);
    }

    /* Token 比价与需求匹配表单双栏 */
    .token-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .token-list-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 14px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .token-list-item:last-child {
      border-bottom: none;
    }

    .token-name {
      font-weight: 700;
      color: var(--text-main);
    }

    .token-price {
      color: var(--primary-color);
      font-weight: 800;
    }

    /* 表单组件 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.92rem;
      color: var(--text-main);
      background: #fdfdfd;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(255, 51, 102, 0.15);
    }

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

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-question {
      padding: 18px 24px;
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 700;
      color: #111827;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary-color);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fcfcfd;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: var(--primary-color);
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 0 24px 20px;
    }

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

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

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-body {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: normal;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }

    .user-name {
      font-weight: 700;
      color: #111827;
      font-size: 0.95rem;
    }

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

    /* 文章列表 */
    .article-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .article-card {
      padding: 20px;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      background: var(--bg-main);
      text-decoration: none;
      display: block;
      transition: all 0.2s ease;
    }

    .article-card:hover {
      border-color: var(--primary-color);
      transform: translateY(-2px);
    }

    .article-title {
      font-size: 1rem;
      font-weight: 700;
      color: #111827;
      margin-bottom: 8px;
    }

    .article-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 底部服务网络与联系我们 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .contact-card-info {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
    }

    .contact-detail-row {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 18px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .qr-container {
      text-align: center;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .qr-img-box {
      max-width: 180px;
      margin: 0 auto 16px;
    }

    .qr-img-box img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px;
      color: var(--text-muted);
    }

    .footer-links-box {
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .footer-links-title {
      font-size: 0.9rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .footer-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .footer-links-flex a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s ease;
    }

    .footer-links-flex a:hover {
      color: var(--primary-color);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-kefu-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      box-shadow: 0 4px 15px rgba(255, 51, 102, 0.4);
      cursor: pointer;
      text-decoration: none;
      transition: transform 0.2s ease;
    }

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

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.3rem; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .scene-grid { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-title { font-size: 1.85rem; }
      .service-grid, .scene-grid, .flow-steps, .cases-grid, .testimonials-grid, .articles-grid, .token-form-grid, .contact-layout, .about-grid {
        grid-template-columns: 1fr;
      }
      .hero-metrics { grid-template-columns: 1fr 1fr; }
      .rating-header-bar { flex-direction: column; text-align: center; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }