:root {
      --primary-color: #4f46e5;
      --primary-bright: #6366f1;
      --accent-cyan: #06b6d4;
      --accent-pink: #ec4899;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-vibrant: 0 10px 25px -5px rgba(79, 70, 229, 0.15), 0 8px 10px -6px rgba(6, 182, 212, 0.1);
      --shadow-hover: 0 20px 30px -10px rgba(79, 70, 229, 0.25);
      --gradient-vibrant: linear-gradient(135deg, #4f46e5 0%, #06b6d4 50%, #ec4899 100%);
      --gradient-subtle: linear-gradient(135deg, #e0e7ff 0%, #cff4fc 50%, #fce7f3 100%);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      color: var(--accent-cyan);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    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);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      background: var(--gradient-vibrant);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
      background: rgba(79, 70, 229, 0.08);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-nav {
      padding: 8px 18px;
      border-radius: 50px;
      background: var(--gradient-vibrant);
      color: #fff !important;
      font-weight: 600;
      font-size: 0.88rem;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    }

    .btn-nav:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.4);
    }

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

    /* 样式块通用规范 */
    .section-padding {
      padding: 80px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    }

    .section-title-box {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary-color);
      font-weight: 600;
      font-size: 0.85rem;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* 首屏 HERO (无图片) */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.12) 0%, rgba(6, 182, 212, 0.05) 50%, rgba(248, 250, 252, 1) 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 30px;
      background: #ffffff;
      border: 1px solid rgba(79, 70, 229, 0.2);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
      font-size: 0.9rem;
      color: var(--primary-color);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #0f172a 0%, #312e81 60%, #4f46e5 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .btn-hero-primary {
      padding: 14px 36px;
      border-radius: 50px;
      background: var(--gradient-vibrant);
      color: #ffffff !important;
      font-size: 1.1rem;
      font-weight: 700;
      box-shadow: 0 8px 25px rgba(79, 70, 229, 0.35);
      transition: all 0.3s ease;
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
    }

    .btn-hero-secondary {
      padding: 14px 32px;
      border-radius: 50px;
      background: #ffffff;
      color: var(--text-main) !important;
      font-size: 1.05rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary-color);
      color: var(--primary-color) !important;
    }

    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .hero-feature-card {
      background: #ffffff;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--shadow-vibrant);
      text-align: left;
    }

    .hero-feature-card h4 {
      font-size: 1.05rem;
      color: var(--primary-color);
      margin-bottom: 6px;
    }

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

    /* 指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 24px;
    }

    .metric-card {
      background: var(--bg-white);
      padding: 30px 20px;
      border-radius: 16px;
      text-align: center;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-vibrant);
      transition: transform 0.3s ease;
    }

    .metric-card:hover {
      transform: translateY(-5px);
    }

    .metric-number {
      font-size: 2.5rem;
      font-weight: 900;
      background: var(--gradient-vibrant);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* AIGC场景网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.03);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--gradient-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      color: var(--primary-color);
    }

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .service-tag {
      font-size: 0.78rem;
      padding: 4px 10px;
      background: rgba(6, 182, 212, 0.1);
      color: var(--accent-cyan);
      border-radius: 6px;
      align-self: flex-start;
      font-weight: 600;
    }

    /* 渲染媒体图片库容器 */
    .image-showcase {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
      margin-top: 40px;
    }

    .image-card {
      background: #fff;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-vibrant);
      border: 1px solid var(--border-color);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .image-card:hover .ai-page-image {
      transform: scale(1.02);
    }

    .image-caption {
      padding: 14px;
      font-size: 0.9rem;
      color: var(--text-muted);
      text-align: center;
      background: #ffffff;
    }

    /* 支持模型标签云 */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      padding: 30px;
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-vibrant);
    }

    .model-chip {
      padding: 8px 18px;
      border-radius: 30px;
      background: var(--bg-light);
      border: 1px solid rgba(226, 232, 240, 0.8);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--gradient-vibrant);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 标准流程时间线 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
      gap: 24px;
    }

    .process-step {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      position: relative;
      text-align: center;
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-vibrant);
      color: #fff;
      font-weight: 800;
      font-size: 1.2rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

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

    /* 对比评测表格 */
    .eval-box {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-vibrant);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 30px;
      background: var(--gradient-subtle);
      border-radius: 14px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-badge {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--primary-color);
    }

    .stars {
      color: #f59e0b;
      font-size: 1.4rem;
    }

    .table-wrapper {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

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

    .compare-table th {
      background: var(--bg-light);
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table tr:hover {
      background: rgba(248, 250, 252, 0.8);
    }

    .highlight-cell {
      font-weight: 700;
      color: var(--primary-color);
      background: rgba(79, 70, 229, 0.03);
    }

    /* Token 比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      padding: 24px;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    }

    .token-model-name {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 10px;
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      padding: 28px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.03);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-vibrant);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
    }

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

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 850px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-header {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-icon {
      font-weight: 400;
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-body {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: none;
      line-height: 1.7;
    }

    .faq-item.active .faq-body {
      display: block;
    }

    /* 表单与需求匹配 */
    .form-box {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-vibrant);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

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

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      display: block;
      font-weight: 600;
      font-size: 0.9rem;
      margin-bottom: 8px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
      background: var(--bg-light);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      background: #fff;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      border-radius: 8px;
      background: var(--gradient-vibrant);
      color: #fff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
      transition: transform 0.2s ease;
    }

    .btn-submit:hover {
      transform: translateY(-2px);
    }

    /* 文章列表组件 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      padding: 24px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
    }

    .article-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    /* 联系与加盟 */
    .contact-card-box {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
      margin-top: 30px;
    }

    .contact-card {
      background: #ffffff;
      padding: 28px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .qr-img {
      width: 160px;
      height: 160px;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      margin: 14px 0;
    }

    /* 友情链接与页脚 */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
    }

    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
    }

    .footer-col p, .footer-col li {
      font-size: 0.9rem;
      line-height: 1.8;
    }

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

    .footer-links li a {
      color: #94a3b8;
    }

    .footer-links li a:hover {
      color: #ffffff;
    }

    .friend-links-box {
      border-top: 1px solid #334155;
      padding-top: 24px;
      margin-top: 24px;
      font-size: 0.88rem;
    }

    .friend-links-box a {
      color: #94a3b8;
      margin-right: 16px;
      display: inline-block;
    }

    .friend-links-box a:hover {
      color: #38bdf8;
    }

    .copyright-bar {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动客服入口 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      background: var(--gradient-vibrant);
      color: #fff;
      padding: 12px 20px;
      border-radius: 30px;
      box-shadow: 0 6px 20px rgba(0,0,0,0.2);
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .nav-links { display: none; }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .menu-toggle { display: block; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group.full { grid-column: span 1; }
    }