:root {
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary-neon: #00e5ff;
      --secondary-neon: #7928ca;
      --accent-green: #10b981;
      --accent-pink: #ff007a;
      --border-color: #e2e8f0;
      --card-bg: #ffffff;
      --card-hover-border: #00e5ff;
      --glow-shadow: 0 10px 30px -10px rgba(0, 229, 255, 0.25);
      --container-max: 1200px;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition-fast: 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(121, 40, 202, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 122, 0.03) 0%, transparent 60%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    /* 容器规范贯穿全页 */
    .site-container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      transition: var(--transition-fast);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #0f172a;
    }
    .brand-title span {
      color: #0284c7;
      text-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition-fast);
    }
    .nav-links li a:hover {
      color: #0284c7;
      background: rgba(0, 229, 255, 0.08);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, #0284c7, #7928ca);
      color: #ffffff !important;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
      transition: var(--transition-fast);
    }
    .btn-nav-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(2, 132, 199, 0.5);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 炫彩主视觉 Hero（禁止任何图片） */
    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.4);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #0369a1;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
    }
    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #00e5ff;
      box-shadow: 0 0 8px #00e5ff;
    }
    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }
    .hero-title .glow-highlight {
      background: linear-gradient(120deg, #0284c7 0%, #7928ca 50%, #ff007a 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      filter: drop-shadow(0 2px 8px rgba(121, 40, 202, 0.2));
    }
    .hero-desc {
      font-size: clamp(1rem, 1.8vw, 1.15rem);
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
    }
    .hero-btn-group {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .btn-main-official {
      padding: 14px 34px;
      background: linear-gradient(135deg, #00d2ff 0%, #0072ff 100%);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 50px;
      box-shadow: 0 8px 24px rgba(0, 114, 255, 0.4), 0 0 0 2px rgba(255, 255, 255, 0.8);
      transition: var(--transition-fast);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-main-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(0, 114, 255, 0.6), 0 0 20px rgba(0, 210, 255, 0.6);
    }
    .btn-secondary-action {
      padding: 14px 28px;
      background: #ffffff;
      color: #0f172a;
      font-size: 1rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      transition: var(--transition-fast);
    }
    .btn-secondary-action:hover {
      border-color: #0284c7;
      color: #0284c7;
      transform: translateY(-2px);
    }

    /* 纯 CSS 视觉首屏数据面板 */
    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
      padding: 24px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(0, 229, 255, 0.3);
      border-radius: var(--radius-lg);
      box-shadow: var(--glow-shadow);
    }
    .stat-item {
      padding: 12px;
      text-align: center;
    }
    .stat-number {
      font-size: 2rem;
      font-weight: 900;
      color: #0f172a;
      background: linear-gradient(135deg, #0284c7, #7928ca);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }
    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 通用区块排版 */
    .section-wrap {
      padding: 60px 0;
    }
    .section-title-box {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 40px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #0284c7;
      background: rgba(2, 132, 199, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 10px;
    }
    .section-h2 {
      font-size: 1.85rem;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-p {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    /* 炫彩荧光卡片通用 */
    .neon-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }
    .neon-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition-fast);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .neon-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #00e5ff, #7928ca, #ff007a);
      opacity: 0;
      transition: var(--transition-fast);
    }
    .neon-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 229, 255, 0.6);
      box-shadow: 0 12px 30px -5px rgba(0, 229, 255, 0.18);
    }
    .neon-card:hover::before {
      opacity: 1;
    }
    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(0, 229, 255, 0.1);
      color: #0284c7;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
    }
    .neon-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 10px;
    }
    .neon-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 模型支持标签云 */
    .model-tags-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }
    .tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-pill {
      font-size: 0.85rem;
      font-weight: 600;
      padding: 8px 16px;
      background: #f1f5f9;
      color: #334155;
      border-radius: 30px;
      border: 1px solid #e2e8f0;
      transition: var(--transition-fast);
    }
    .model-pill:hover {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 0 12px rgba(2, 132, 199, 0.4);
      transform: scale(1.05);
    }

    /* 对比评测卡片与表格 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #0f172a, #1e293b);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 30px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      border: 1px solid rgba(0, 229, 255, 0.4);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }
    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .eval-score-num {
      font-size: 3.2rem;
      font-weight: 900;
      color: #00e5ff;
      line-height: 1;
      text-shadow: 0 0 15px rgba(0, 229, 255, 0.6);
    }
    .eval-stars {
      color: #fbbf24;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    .eval-score-desc {
      font-size: 0.95rem;
      color: #cbd5e1;
    }
    .custom-table-wrap {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    }
    .styled-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .styled-table th, .styled-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.9rem;
    }
    .styled-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #0f172a;
    }
    .styled-table tbody tr:hover {
      background: rgba(0, 229, 255, 0.03);
    }
    .table-check {
      color: #10b981;
      font-weight: 700;
    }
    .table-badge-best {
      background: rgba(0, 229, 255, 0.15);
      color: #0369a1;
      padding: 4px 8px;
      border-radius: 4px;
      font-weight: 600;
      font-size: 0.8rem;
    }

    /* 案例展示画廊 (使用指定素材图片) */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
      transition: var(--transition-fast);
    }
    .gallery-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--glow-shadow);
      border-color: rgba(0, 229, 255, 0.5);
    }
    .gallery-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
    }
    .gallery-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
    }
    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .gallery-card:hover .gallery-img-wrap img {
      transform: scale(1.04);
    }
    .gallery-info {
      padding: 20px;
    }
    .gallery-info h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #0f172a;
    }
    .gallery-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .process-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: var(--transition-fast);
    }
    .process-step-item:hover {
      border-color: #0284c7;
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(2, 132, 199, 0.1);
    }
    .step-number-bubble {
      width: 44px;
      height: 44px;
      line-height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #7928ca);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.1rem;
      margin: 0 auto 16px;
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-fast);
    }
    .faq-item:hover {
      border-color: #0284c7;
    }
    .faq-header {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      color: #0f172a;
      font-size: 0.95rem;
    }
    .faq-arrow {
      font-size: 0.8rem;
      transition: transform 0.25s ease;
      color: #0284c7;
    }
    .faq-item.open .faq-arrow {
      transform: rotate(180deg);
    }
    .faq-body {
      padding: 0 22px 18px;
      display: none;
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .faq-item.open .faq-body {
      display: block;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0f2fe, #f3e8ff);
      color: #0284c7;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .reviewer-name {
      font-weight: 700;
      color: #0f172a;
      font-size: 0.95rem;
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .review-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求匹配与联系表单 */
    .contact-container-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: #0f172a;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      background: #f8fafc;
      color: #0f172a;
      transition: var(--transition-fast);
    }
    .form-control:focus {
      outline: none;
      border-color: #0284c7;
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
    }
    .btn-submit-form {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, #0284c7, #7928ca);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      transition: var(--transition-fast);
      box-shadow: 0 4px 15px rgba(2, 132, 199, 0.3);
    }
    .btn-submit-form:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(2, 132, 199, 0.5);
    }
    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding-left: 20px;
      border-left: 1px solid #f1f5f9;
    }
    .contact-meta-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin: 16px 0;
    }
    .contact-meta-item {
      font-size: 0.9rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contact-qr-box {
      text-align: center;
      background: #f8fafc;
      border: 1px dashed #cbd5e1;
      padding: 16px;
      border-radius: var(--radius-md);
      max-width: 220px;
    }
    .contact-qr-box img {
      width: 140px;
      height: 140px;
      display: block;
      margin: 0 auto 8px;
      border-radius: 6px;
    }
    .contact-qr-box p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 最新文章与资讯列表 */
    .articles-block-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 24px;
    }
    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .article-link-item a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.9rem;
      color: var(--text-muted);
      padding: 10px 14px;
      background: #f8fafc;
      border-radius: 6px;
      transition: var(--transition-fast);
    }
    .article-link-item a:hover {
      background: rgba(0, 229, 255, 0.08);
      color: #0284c7;
      padding-left: 18px;
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 50px 0 30px;
      margin-top: 40px;
      border-top: 2px solid #00e5ff;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 36px;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
      position: relative;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list a {
      font-size: 0.85rem;
      color: #94a3b8;
      transition: var(--transition-fast);
    }
    .footer-links-list a:hover {
      color: #00e5ff;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links-wrap a {
      font-size: 0.85rem;
      color: #94a3b8;
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
      transition: var(--transition-fast);
    }
    .friend-links-wrap a:hover {
      color: #00e5ff;
      background: rgba(0, 229, 255, 0.15);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮客服小部件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #0f172a;
      color: #00e5ff;
      border: 1px solid rgba(0, 229, 255, 0.5);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition-fast);
    }
    .float-btn:hover {
      transform: scale(1.1);
      background: #0284c7;
      color: #ffffff;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.6);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .contact-container-grid {
        grid-template-columns: 1fr;
      }
      .contact-info-panel {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid #f1f5f9;
        padding-top: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }