:root {
      --primary: #4f46e5;
      --primary-light: #6366f1;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
      --accent-gradient: linear-gradient(135deg, #ec4899 0%, #8b5cf6 50%, #3b82f6 100%);
      --warm-gradient: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
      --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
      --radius: 12px;
      --container-max: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      transition: color 0.2s ease, background-color 0.2s ease;
      display: block;
    }
    .nav-links a:hover {
      color: var(--primary);
      background-color: #f1f5f9;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: 8px;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      cursor: pointer;
      border: none;
      text-align: center;
    }
    .btn:hover {
      transform: translateY(-1px);
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }
    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border: 1px solid #cbd5e1;
    }
    .btn-accent {
      background: var(--warm-gradient);
      color: #ffffff;
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* 首屏纯文字与几何设计 (无图片) */
    .hero-section {
      position: relative;
      padding: 80px 0 70px 0;
      background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 45%),
                  radial-gradient(circle at bottom left, rgba(6, 182, 212, 0.08), transparent 45%),
                  #ffffff;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      font-size: 0.875rem;
      font-weight: 600;
      color: #4338ca;
      background-color: #e0e7ff;
      border-radius: 9999px;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
    }
    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
    }
    .hero-grid-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }
    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .stat-value {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 通用板块 */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }
    .section-subtitle {
      font-size: 0.875rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 斑斓彩调标签条 */
    .models-bar {
      padding: 24px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-chip {
      font-size: 0.85rem;
      font-weight: 500;
      padding: 6px 14px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: #334155;
      transition: all 0.2s;
    }
    .model-chip:hover {
      background: #eef2ff;
      border-color: #c7d2fe;
      color: var(--primary);
      transform: translateY(-1px);
    }

    /* 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .about-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 18px;
      color: var(--text-main);
    }
    .about-content p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .feature-points {
      list-style: none;
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .feature-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .feature-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
    }
    .about-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .about-card-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--accent-gradient);
      border-radius: var(--radius) var(--radius) 0 0;
    }
    .highlight-badge {
      display: inline-block;
      padding: 4px 10px;
      background: #ecfdf5;
      color: #059669;
      font-size: 0.8rem;
      font-weight: 700;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    /* AIGC 服务卡片 (斑斓彩调) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .service-badge {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      color: #ffffff;
      margin-bottom: 18px;
    }
    .badge-c1 { background: linear-gradient(135deg, #3b82f6, #06b6d4); }
    .badge-c2 { background: linear-gradient(135deg, #ec4899, #f43f5e); }
    .badge-c3 { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
    .badge-c4 { background: linear-gradient(135deg, #10b981, #059669); }
    .badge-c5 { background: linear-gradient(135deg, #f59e0b, #ea580c); }
    .badge-c6 { background: linear-gradient(135deg, #6366f1, #d946ef); }

    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      flex-grow: 1;
      line-height: 1.55;
    }

    /* 一站式制作步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: left;
      box-shadow: var(--shadow-sm);
    }
    .step-num {
      display: inline-block;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
      border-bottom: 2px solid var(--primary);
      padding-bottom: 4px;
    }
    .step-item h3 {
      font-size: 1.05rem;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 行业方案展示 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .solution-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .solution-card h3 {
      font-size: 1.2rem;
      margin-bottom: 12px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .solution-tag {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: #eef2ff;
      color: var(--primary);
    }
    .solution-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      margin-bottom: 14px;
    }
    .solution-card ul {
      padding-left: 20px;
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .solution-card li {
      margin-bottom: 6px;
    }

    /* 案例中心 (包含素材图) */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .media-img-wrap {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      aspect-ratio: 16 / 10;
    }
    .media-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .media-card:hover .media-img-wrap img {
      transform: scale(1.03);
    }
    .media-content {
      padding: 20px;
      flex-grow: 1;
    }
    .media-content h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .media-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 对比评测 (严格遵循要求) */
    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 36px 40px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .rating-summary h3 {
      font-size: 1.75rem;
      margin-bottom: 6px;
      color: #ffffff;
    }
    .rating-summary p {
      font-size: 1rem;
      color: #cbd5e1;
    }
    .rating-score-box {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 16px 28px;
      border-radius: 12px;
      text-align: right;
    }
    .rating-stars {
      color: #fbbf24;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }
    .rating-number {
      font-size: 2.25rem;
      font-weight: 800;
      color: #ffffff;
      line-height: 1.1;
    }
    .rating-full {
      font-size: 0.9rem;
      color: #94a3b8;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .compare-table th {
      background-color: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table td:nth-child(2) {
      background-color: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background-color: #fcfdfe;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-body {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: normal;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .avatar-char {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #e0e7ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .user-info .name {
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text-main);
    }
    .user-info .role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 600;
      font-size: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #ffffff;
      color: var(--text-main);
      transition: background-color 0.15s;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.2s ease;
      color: var(--text-muted);
    }
    .faq-answer {
      padding: 0 22px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.25s ease-out, padding 0.25s ease;
      font-size: 0.925rem;
      color: var(--text-muted);
      border-top: 1px solid transparent;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 22px 20px 22px;
      border-top-color: var(--border-color);
      background-color: #fafbfc;
    }

    /* 资讯与友情链接 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-bottom: 40px;
    }
    .news-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 18px;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .news-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .news-card h4 {
      font-size: 0.95rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .news-card a {
      font-size: 0.85rem;
      color: var(--primary);
      word-break: break-all;
    }

    /* 服务网络与加盟代理 */
    .network-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .agent-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .agent-card h3 {
      font-size: 1.4rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .agent-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.875rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-qr {
      max-width: 110px;
      background: #ffffff;
      padding: 6px;
      border-radius: 8px;
      display: inline-block;
      margin-top: 8px;
    }
    .footer-qr img {
      width: 100%;
      height: auto;
      display: block;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }
    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: #64748b;
    }
    .footer-friend-links a {
      color: #94a3b8;
    }
    .footer-friend-links a:hover {
      color: #ffffff;
    }

    /* 浮动客服挂件 */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .dock-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-weight: bold;
      transition: transform 0.2s;
    }
    .dock-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid-stats { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .solutions-grid { grid-template-columns: 1fr; }
      .media-card-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr 1fr; }
      .about-grid { grid-template-columns: 1fr; }
      .network-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-outline { display: none; }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .menu-toggle { display: block; }
      .hero-title { font-size: 2rem; }
      .hero-grid-stats { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .rating-banner { flex-direction: column; align-items: flex-start; }
      .rating-score-box { text-align: left; width: 100%; }
    }