:root {
      --primary: #FF5A1F;
      --primary-dark: #E0430B;
      --primary-light: #FFF2ED;
      --primary-glow: rgba(255, 90, 31, 0.15);
      --secondary: #FF8A00;
      --dark-text: #1E232A;
      --body-text: #4A5568;
      --light-text: #718096;
      --border-color: #E8ECEF;
      --bg-light: #FBFBFC;
      --bg-card: #FFFFFF;
      --bg-warm: #FFF8F5;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(255,90,31,0.08);
      --shadow-lg: 0 16px 36px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--body-text);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #FFFFFF 0%, #FFF9F6 400px, #FBFBFC 1000px);
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

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

    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      font-size: 11px;
      background: var(--primary-light);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 20px;
      font-weight: 600;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--dark-text);
      font-size: 15px;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s;
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }

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

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #FFFFFF !important;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: 30px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(255, 90, 31, 0.3);
      transition: transform 0.2s, box-shadow 0.2s;
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 90, 31, 0.4);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #FFFFFF;
      color: var(--dark-text);
      border: 1px solid var(--border-color);
      font-weight: 600;
      padding: 10px 20px;
      border-radius: 30px;
      text-decoration: none;
      transition: all 0.2s;
    }

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--dark-text);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 纯色科技感首屏 Hero (无图片) */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-light);
      border: 1px solid rgba(255, 90, 31, 0.25);
      color: var(--primary-dark);
      font-size: 14px;
      font-weight: 600;
      padding: 6px 18px;
      border-radius: 50px;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 46px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--dark-text);
      max-width: 900px;
      margin: 0 auto 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, #FF2E00 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--body-text);
      max-width: 720px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      padding: 14px 36px;
      font-size: 17px;
      border-radius: 40px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
      background: #FFFFFF;
      padding: 28px 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--light-text);
      font-weight: 500;
    }

    /* 模块通用样式 */
    section {
      padding: 70px 0;
    }

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

    .section-subtitle {
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-intro {
      font-size: 16px;
      color: var(--light-text);
    }

    /* 平台聚合与模型矩阵 */
    .model-matrix-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-bottom: 30px;
    }

    .model-chip {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-text);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .model-chip::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10B981;
    }

    /* 核心能力服务网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 30px 24px;
      border: 1px solid var(--border-color);
      transition: all 0.3s;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 90, 31, 0.4);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 19px;
      color: var(--dark-text);
      margin-bottom: 10px;
      font-weight: 700;
    }

    .service-card p {
      font-size: 14px;
      color: var(--body-text);
      line-height: 1.6;
      flex-grow: 1;
    }

    .service-tag {
      margin-top: 18px;
      font-size: 12px;
      color: var(--primary-dark);
      font-weight: 600;
      background: var(--bg-warm);
      padding: 4px 10px;
      border-radius: 6px;
      align-self: flex-start;
    }

    /* 一站式创作场景瀑布展示 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .scenario-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px;
      transition: all 0.25s;
    }

    .scenario-box:hover {
      border-color: var(--primary);
      background: var(--bg-warm);
    }

    .scenario-box h4 {
      font-size: 16px;
      color: var(--dark-text);
      margin-bottom: 8px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .scenario-box p {
      font-size: 13px;
      color: var(--light-text);
      line-height: 1.5;
    }

    /* 标准流程时间线 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 28px 20px;
      border-radius: var(--radius-md);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 17px;
      margin-bottom: 10px;
      color: var(--dark-text);
    }

    .step-card p {
      font-size: 13px;
      color: var(--body-text);
    }

    /* 对比评测精装卡与表格 */
    .review-score-banner {
      background: linear-gradient(135deg, #1E232A 0%, #2D3748 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }

    .score-left h3 {
      font-size: 26px;
      margin-bottom: 8px;
      color: #FFFFFF;
    }

    .score-left p {
      color: #A0AEC0;
      font-size: 15px;
    }

    .score-stars {
      color: #FFB800;
      font-size: 24px;
      letter-spacing: 2px;
      margin-top: 6px;
    }

    .score-val-wrap {
      text-align: right;
    }

    .score-number {
      font-size: 56px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-scale {
      font-size: 16px;
      color: #CBD5E0;
    }

    .table-container {
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .comparison-table th {
      background: #F8FAFC;
      color: var(--dark-text);
      font-weight: 700;
    }

    .comparison-table td.highlight-col {
      background: var(--bg-warm);
      color: var(--primary-dark);
      font-weight: 600;
    }

    /* 案例展示画廊 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

    .gallery-item {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .gallery-img-wrap {
      width: 100%;
      background: #EDF2F7;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s;
    }

    .gallery-img-wrap:hover img {
      transform: scale(1.02);
    }

    .gallery-info {
      padding: 20px;
    }

    .gallery-info h4 {
      font-size: 17px;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .gallery-info p {
      font-size: 13px;
      color: var(--light-text);
    }

    .square-cases {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    /* Token 比价看板 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px 24px;
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
    }

    .featured-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 14px;
      border-radius: 20px;
      font-weight: 700;
    }

    .pricing-card h4 {
      font-size: 20px;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .price-num {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .price-num span {
      font-size: 14px;
      font-weight: normal;
      color: var(--light-text);
    }

    .price-features {
      list-style: none;
      margin: 20px 0 28px;
      text-align: left;
    }

    .price-features li {
      font-size: 14px;
      color: var(--body-text);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    /* 客户评价网格 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .testimonial-body {
      font-size: 14px;
      line-height: 1.7;
      color: var(--body-text);
      margin-bottom: 18px;
      position: relative;
    }

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

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
    }

    .user-role {
      font-size: 12px;
      color: var(--light-text);
    }

    /* 常见问题 FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.2s;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--dark-text);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--light-text);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--body-text);
      font-size: 14px;
      line-height: 1.6;
      background: var(--bg-warm);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px;
      border-top: 1px solid rgba(255,90,31,0.1);
    }

    /* 资讯文章列表 */
    .article-section-box {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 30px;
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 6px;
      color: var(--dark-text);
      text-decoration: none;
      font-size: 13px;
      transition: all 0.2s;
    }

    .article-link-item:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-col {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .qr-box {
      width: 160px;
      height: 160px;
      border: 1px solid var(--border-color);
      padding: 8px;
      border-radius: 8px;
      background: #FFFFFF;
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--dark-text);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
      background: #FAFAFA;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 加盟代理模块 */
    .agent-banner {
      background: linear-gradient(135deg, #FFF6F2 0%, #FFE9DE 100%);
      border: 1px solid rgba(255, 90, 31, 0.3);
      border-radius: var(--radius-lg);
      padding: 40px;
      text-align: center;
      margin-top: 30px;
    }

    .agent-banner h3 {
      font-size: 26px;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .agent-banner p {
      font-size: 15px;
      color: var(--body-text);
      max-width: 700px;
      margin: 0 auto 24px;
    }

    /* 友情链接与页脚 */
    footer.site-footer {
      background: #191C20;
      color: #A0AEC0;
      padding: 60px 0 30px;
      border-top: 1px solid #2D3748;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      margin-bottom: 18px;
      font-weight: 600;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #A0AEC0;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }

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

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

    .friend-links-wrap a {
      color: #A0AEC0;
      text-decoration: none;
      font-size: 13px;
      background: #23272E;
      padding: 4px 10px;
      border-radius: 4px;
      transition: all 0.2s;
    }

    .friend-links-wrap a:hover {
      color: #FFFFFF;
      background: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #2D3748;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      color: #718096;
    }

    /* 悬浮快速通道 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--dark-text);
      text-decoration: none;
      font-size: 18px;
      transition: all 0.2s;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .service-grid, .testimonial-grid, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 20px;
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 8px;
      }
      .nav-links a {
        width: 100%;
        text-align: center;
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-item:nth-child(2) {
        border-right: none;
      }
      .stat-item {
        margin-bottom: 12px;
      }
      .service-grid, .gallery-grid, .square-cases, .pricing-grid, .testimonial-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .score-val-wrap {
        text-align: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }