/* 全局 CSS 变量 */
    :root {
      --primary: #0ea5e9; /* 科技青 */
      --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0ea5e9 100%);
      --accent: #2dd4bf; /* 极光青 */
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #94a3b8;
      --bg-main: #f8fafc;
      --bg-sec: #f1f5f9;
      --bg-card: #ffffff;
      --border: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-width: 1200px;
      --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
      --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    }

    /* 基础重置 */
    * {
      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;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      z-index: 1000;
      transition: var(--transition);
    }
    .header.scrolled {
      background: #ffffff;
      box-shadow: var(--shadow);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-btn {
      background: var(--primary-gradient);
      color: #fff !important;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .nav-btn:hover {
      opacity: 0.9;
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .menu-toggle span {
      display: block;
      width: 25px;
      height: 3px;
      background-color: var(--text-main);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* Hero 首屏 (无图设计，采用渐变背景和光晕) */
    .hero-section {
      padding: 160px 0 100px 0;
      background: radial-gradient(circle at 80% 20%, rgba(45, 212, 191, 0.1) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
                  #ffffff;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 35px auto;
    }
    .hero-actions {
      display: flex;
      gap: 15px;
      justify-content: center;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #fff;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1.05rem;
      box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
    }
    .btn-secondary {
      background: var(--bg-sec);
      color: var(--text-main);
      padding: 14px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 1.05rem;
      border: 1px solid var(--border);
    }
    .btn-secondary:hover {
      background: var(--border);
      transform: translateY(-2px);
    }
    .hero-badge-container {
      display: flex;
      justify-content: center;
      gap: 15px;
      flex-wrap: wrap;
    }
    .hero-badge {
      background: rgba(13, 148, 136, 0.06);
      border: 1px solid rgba(13, 148, 136, 0.15);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
    }

    /* 数据指标卡片 */
    .stats-section {
      padding: 50px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      text-align: center;
    }
    .stat-card {
      padding: 20px;
    }
    .stat-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 5px;
    }
    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 全平台AIGC服务 */
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 15px;
    }
    .section-title span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 35px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(13, 148, 136, 0.3);
    }
    .service-icon {
      width: 50px;
      height: 50px;
      background: rgba(13, 148, 136, 0.1);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.3rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      flex-grow: 1;
    }

    /* 一站式AIGC制作与平台展示 */
    .models-tags-container {
      background: var(--bg-sec);
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-top: 40px;
    }
    .tags-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tags-title::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 16px;
      background: var(--primary-gradient);
      border-radius: 2px;
    }
    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag-item {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .tag-item:hover {
      background: var(--primary-gradient);
      color: #ffffff;
      border-color: transparent;
    }

    /* 全行业解决方案 */
    .solutions-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .solutions-text h3 {
      font-size: 1.75rem;
      margin-bottom: 15px;
      font-weight: 700;
    }
    .solutions-text p {
      color: var(--text-muted);
      margin-bottom: 25px;
    }
    .solution-list {
      list-style: none;
    }
    .solution-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-weight: 500;
    }
    .solution-list li svg {
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 标准化流程与步骤 */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 25px;
      position: relative;
    }
    .workflow-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
      z-index: 2;
    }
    .workflow-step {
      position: absolute;
      top: 15px;
      right: 20px;
      font-size: 2.5rem;
      font-weight: 900;
      color: rgba(13, 148, 136, 0.08);
      line-height: 1;
    }
    .workflow-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .workflow-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比评测板块 */
    .evaluation-card {
      background: radial-gradient(100% 100% at 0% 0%, rgba(13, 148, 136, 0.05) 0%, transparent 100%), #ffffff;
      border: 2px solid rgba(13, 148, 136, 0.2);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 20px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 15px;
    }
    .eval-score {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
    }
    .eval-stars {
      color: #eab308;
      font-size: 1.5rem;
    }
    .eval-rec-badge {
      background: #14b8a6;
      color: #fff;
      padding: 6px 14px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 600px;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 15px 20px;
      border-bottom: 1px solid var(--border);
    }
    .eval-table th {
      background: var(--bg-sec);
      font-weight: 700;
    }
    .eval-table td strong {
      color: var(--primary);
    }

    /* Token比价与匹配表单 */
    .token-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
    }
    .form-control {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: var(--bg-main);
      font-size: 0.95rem;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px var(--primary-glow);
    }
    .btn-submit {
      width: 100%;
      background: var(--primary-gradient);
      color: #ffffff;
      border: none;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover {
      opacity: 0.95;
    }

    /* 培训板块 */
    .training-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .training-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: var(--transition);
    }
    .training-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }
    .training-body {
      padding: 30px;
    }
    .training-badge {
      background: rgba(14, 165, 233, 0.1);
      color: var(--secondary);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 15px;
      display: inline-block;
    }
    .training-body h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .training-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 15px;
    }
    .review-avatar-text h4 {
      font-size: 1rem;
      color: var(--text-main);
    }
    .review-avatar-text span {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .review-stars {
      color: #eab308;
      font-size: 0.85rem;
      margin-left: auto;
    }
    .review-content {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* FAQ */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 15px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question::after {
      content: '+';
      font-size: 1.25rem;
      color: var(--text-light);
      transition: var(--transition);
    }
    .faq-item.active .faq-question::after {
      content: '-';
      transform: rotate(90deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: var(--bg-sec);
    }
    .faq-answer-inner {
      padding: 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 新闻库与百科 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .news-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 25px;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow);
      border-color: var(--primary);
    }
    .news-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .news-title a {
      color: var(--text-main);
    }
    .news-title a:hover {
      color: var(--primary);
    }
    .news-excerpt {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 客服联系 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .contact-details {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .contact-info-list {
      list-style: none;
      margin-bottom: 30px;
    }
    .contact-info-list li {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 15px;
      font-size: 1.05rem;
    }
    .contact-info-list svg {
      color: var(--primary);
    }
    .qr-code-box {
      border: 1px solid var(--border);
      padding: 20px;
      border-radius: var(--radius-lg);
      background: #ffffff;
      display: inline-block;
    }
    .qr-code-box img {
      max-width: 150px;
      margin: 0 auto 10px auto;
    }
    .qr-label {
      text-align: center;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      position: relative;
    }
    .float-btn:hover {
      background: var(--bg-sec);
    }
    .float-btn svg {
      width: 24px;
      height: 24px;
      fill: var(--primary);
    }
    .float-qr {
      position: absolute;
      bottom: 60px;
      right: 0;
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 15px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      display: none;
      width: 160px;
    }
    .float-btn:hover .float-qr {
      display: block;
    }

    /* 区块通用结构 */
    .section-padding {
      padding: 90px 0;
    }
    .bg-light {
      background-color: var(--bg-sec);
    }
    .bg-dark-hero {
      background: linear-gradient(180deg, var(--bg-main) 0%, #ffffff 100%);
    }

    /* 页脚 */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 20px 0;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 15px;
    }
    .footer-brand p {
      margin-bottom: 20px;
    }
    .footer-links h5 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 15px;
    }
    .footer-links ul {
      list-style: none;
    }
    .footer-links ul li {
      margin-bottom: 10px;
    }
    .footer-links ul li a:hover {
      color: #ffffff;
    }
    .friendship-links {
      border-top: 1px solid #334155;
      padding-top: 20px;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 0.8rem;
    }
    .friendship-links a {
      color: #64748b;
    }
    .friendship-links a:hover {
      color: #ffffff;
    }
    .copyright-area {
      border-top: 1px solid #334155;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 0.8rem;
    }

    /* 响应式调整 */
    @media (max-width: 991px) {
      .hero-h1 { font-size: 2.25rem; }
      .solutions-grid, .token-grid, .contact-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-lg);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }