:root {
      --neon-teal: #00e5a3;
      --neon-cyan: #06b6d4;
      --neon-blue: #3b82f6;
      --neon-purple: #8b5cf6;
      --neon-pink: #f43f5e;
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-glow: rgba(0, 229, 163, 0.35);
      --border-subtle: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-glow: 0 10px 30px -10px rgba(0, 229, 163, 0.25);
      --container-w: 1200px;
      --radius-lg: 16px;
      --radius-md: 10px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(0, 229, 163, 0.08) 0%, transparent 50%);
      background-attachment: fixed;
    }

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

    ul, ol {
      list-style: none;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-area img.ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .brand-title span {
      background: linear-gradient(135deg, #0284c7, #00b887);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: #0284c7;
      background: rgba(6, 182, 212, 0.08);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 999px;
      background: linear-gradient(135deg, #0284c7, #00c98d);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(0, 201, 141, 0.35);
      border: none;
      cursor: pointer;
    }
    .btn-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 201, 141, 0.45);
    }

    /* 首屏 Hero (严禁出现图片) */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 163, 0.12);
      border: 1px solid rgba(0, 201, 141, 0.4);
      color: #047857;
      padding: 6px 18px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 24px;
      box-shadow: 0 0 16px rgba(0, 229, 163, 0.2);
    }
    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      background: #00e5a3;
      border-radius: 50%;
      box-shadow: 0 0 8px #00e5a3;
    }
    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--text-main);
      max-width: 900px;
      margin: 0 auto 20px;
    }
    .hero-title .glow-gradient {
      background: linear-gradient(135deg, #0369a1 0%, #0d9488 50%, #10b981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-cta-btn {
      padding: 14px 34px;
      border-radius: 12px;
      font-weight: 700;
      font-size: 1.05rem;
      box-shadow: 0 10px 25px rgba(2, 132, 199, 0.25);
      background: linear-gradient(135deg, #0284c7 0%, #00c98d 100%);
      color: #ffffff !important;
      position: relative;
      overflow: hidden;
    }
    .hero-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(0, 201, 141, 0.4);
    }
    .hero-secondary-btn {
      padding: 14px 30px;
      border-radius: 12px;
      font-weight: 700;
      font-size: 1.02rem;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
    }
    .hero-secondary-btn:hover {
      border-color: #00c98d;
      color: #0d9488;
      background: #f8fafc;
    }

    /* 核心指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .metric-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }
    .metric-num {
      font-size: 2.3rem;
      font-weight: 800;
      color: #0284c7;
      margin-bottom: 4px;
      font-family: inherit;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 模块通用标题 */
    .section-block {
      padding: 80px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: #0d9488;
      text-transform: uppercase;
      letter-spacing: 1px;
      display: inline-block;
      margin-bottom: 10px;
      padding: 4px 14px;
      background: rgba(13, 148, 136, 0.08);
      border-radius: 20px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto;
    }

    /* 平台介绍 */
    .intro-box {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .intro-text h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .intro-text p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 1rem;
    }
    .intro-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }
    .intro-badge-item {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .intro-media-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-subtle);
    }
    .intro-media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .intro-media-card:hover img {
      transform: scale(1.02);
    }

    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .service-card:hover {
      border-color: #00c98d;
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
    }
    .service-card h4 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵标签云 */
    .models-cloud-wrap {
      background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 30px;
      text-align: center;
      margin-top: 36px;
    }
    .model-tag {
      display: inline-block;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #1e293b;
      padding: 6px 14px;
      margin: 5px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      transition: all 0.2s;
    }
    .model-tag:hover {
      border-color: #00c98d;
      color: #0d9488;
      background: rgba(0, 229, 163, 0.08);
      transform: scale(1.05);
    }

    /* 对比评测高亮 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(2, 132, 199, 0.04), rgba(0, 201, 141, 0.06));
      border: 1px solid rgba(0, 201, 141, 0.3);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score-item {
      text-align: center;
    }
    .eval-score-num {
      font-size: 2.8rem;
      font-weight: 800;
      color: #0d9488;
      line-height: 1;
      margin-bottom: 6px;
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      margin-bottom: 6px;
    }
    .eval-score-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 对比表格 */
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
    }
    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .custom-table tr:hover td {
      background: #fbfdff;
    }
    .custom-table .highlight-col {
      background: rgba(0, 229, 163, 0.04);
      font-weight: 600;
      color: #047857;
    }

    /* 流程步骤 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #00c98d);
      color: #fff;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 案例展示横版/宣传图 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
      margin-bottom: 30px;
    }
    .gallery-item {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .gallery-item img {
      width: 100%;
      height: auto;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      display: block;
    }
    .gallery-desc {
      padding: 16px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4, #00c98d);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .review-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .review-role {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      color: var(--text-main);
    }
    .faq-question:hover {
      color: #0284c7;
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-icon {
      transition: transform 0.25s ease;
      font-size: 1.2rem;
      color: #64748b;
    }

    /* 表单区域 */
    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      background: #f8fafc;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: #00c98d;
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 201, 141, 0.15);
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, #0284c7, #00c98d);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.25s;
    }
    .form-submit-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0, 201, 141, 0.3);
    }
    .contact-info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .qr-box {
      text-align: center;
      margin-top: 24px;
      padding: 20px;
      background: #f8fafc;
      border-radius: var(--radius-md);
      border: 1px dashed #cbd5e1;
    }
    .qr-box img {
      max-width: 180px;
      height: auto;
      border-radius: 8px;
      margin-bottom: 10px;
    }

    /* 资讯与友情链接 */
    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
    }
    .article-link-item:hover {
      border-color: #00c98d;
      background: #fbfdff;
    }

    .footer-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }
    .footer-links-wrap a {
      color: #0284c7;
      font-size: 0.92rem;
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: 6px;
    }
    .footer-links-wrap a:hover {
      background: rgba(0, 229, 163, 0.15);
      color: #0d9488;
    }

    /* 页脚统一深灰底或纯净浅底 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-subtle);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h5 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 24px;
      text-align: center;
      color: var(--text-light);
      font-size: 0.88rem;
    }

    /* 浮动客服 */
    .float-service-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #00c98d);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(0, 201, 141, 0.4);
      cursor: pointer;
      font-size: 1.2rem;
    }

    @media (max-width: 900px) {
      .intro-box, .form-layout, .footer-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .hero-title {
        font-size: 1.9rem;
      }
    }