:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent: #f97316;
      --accent-light: #ffedd5;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --success: #10b981;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 12px rgba(37, 99, 235, 0.08);
      --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.25s ease;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 顶部导航 */
    .site-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);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.93rem;
      color: var(--text-muted);
      font-weight: 500;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(37, 99, 235, 0.06);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      line-height: 1;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }

    .btn-accent {
      background: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }

    .btn-accent:hover {
      background: #ea580c;
      transform: translateY(-1px);
    }

    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f8fafc;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      padding: 8px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero 区域 - 明确严禁出现任何图片 */
    .hero-section {
      position: relative;
      padding: 70px 0 60px;
      background: linear-gradient(135deg, #ffffff 0%, #eff6ff 45%, #fef3c7 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #bfdbfe;
      border-radius: 999px;
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      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: -0.02em;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
    }

    .hero-stat-card {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .hero-stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: #bfdbfe;
    }

    .hero-stat-val {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .hero-stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 通用Section */
    .section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
      background: var(--bg-page);
    }

    .section-alt {
      background: #ffffff;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      background: #dbeafe;
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.01em;
    }

    .section-sub {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 关于我们 / 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .intro-text-block p {
      font-size: 1.02rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.75;
    }

    .intro-highlights {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .intro-highlight-item {
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      border-left: 4px solid var(--primary);
    }

    .intro-highlight-item h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .intro-highlight-item p {
      font-size: 0.88rem;
      color: var(--text-light);
      margin: 0;
    }

    .media-card {
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .media-card img {
      border-radius: var(--radius-md);
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 模型矩阵徽章 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      padding: 8px 14px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-badge:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #eff6ff;
    }

    /* 服务能力卡片网格 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #bfdbfe;
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background: #eff6ff;
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 20px;
    }

    .feature-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    /* 一站式制作模块 - 场景矩阵 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
    }

    .scene-box:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .scene-box-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scene-box-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标准流程时间线 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 44px;
      height: 44px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }

    .step-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 案例画廊展示 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .gallery-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .gallery-item .img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: var(--bg-subtle);
    }

    .gallery-item .img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .gallery-item:hover .img-wrap img {
      transform: scale(1.05);
    }

    .gallery-caption {
      padding: 14px 16px;
    }

    .gallery-caption h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .gallery-caption p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 对比评测模块 */
    .review-summary-card {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .review-score-area {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .big-score {
      font-size: 4rem;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .max-score {
      font-size: 1.4rem;
      color: #94a3b8;
    }

    .review-stars {
      color: #fbbf24;
      font-size: 1.4rem;
      margin-top: 6px;
    }

    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.94rem;
    }

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

    .custom-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-col {
      background: #f0fdf4;
      font-weight: 600;
      color: #166534;
    }

    /* 客户评价网格 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-md);
    }

    .testimonial-content {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      position: relative;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #dbeafe;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .user-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info span {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #cbd5e1;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #f8fafc;
      border-top: 0 solid var(--border-color);
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      transition: max-height 0.3s ease-in-out;
      border-top-width: 1px;
    }

    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-col h3 {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .contact-info-col p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .contact-details {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 28px;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .contact-row strong {
      color: var(--text-muted);
      min-width: 80px;
    }

    .qr-card {
      display: inline-block;
      text-align: center;
      background: #f8fafc;
      padding: 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      max-width: 200px;
    }

    .qr-card img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px;
      object-fit: contain;
    }

    .qr-card span {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .form-col form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #ffffff;
      color: var(--text-main);
      transition: var(--transition);
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    }

    /* 资讯与友情链接 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .news-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }

    .news-card h4 {
      font-size: 1.05rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .news-links-box {
      margin-top: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .news-link-btn {
      font-size: 0.85rem;
      padding: 6px 12px;
      background: #f1f5f9;
      border-radius: var(--radius-sm);
      color: var(--primary);
      font-weight: 500;
    }

    .news-link-btn:hover {
      background: #e2e8f0;
    }

    /* 友链区域 */
    .links-section {
      padding: 30px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }

    .links-box {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.88rem;
    }

    .links-title {
      font-weight: 700;
      color: var(--text-main);
    }

    .links-box a {
      color: var(--text-muted);
    }

    .links-box a:hover {
      color: var(--primary);
    }

    /* 页脚 Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-nav-col h5 {
      color: #ffffff;
      font-size: 0.95rem;
      margin-bottom: 14px;
    }

    .footer-nav-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-nav-col ul li a {
      color: #94a3b8;
      font-size: 0.88rem;
    }

    .footer-nav-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
    }

    .footer-bottom a {
      color: #cbd5e1;
    }

    /* 浮动操作栏 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      transition: var(--transition);
      font-size: 1.1rem;
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .scene-grid { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .gallery-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: 1fr; }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.open { display: block; }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 0;
      }
      .nav-links li { width: 100%; }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .hero-title { font-size: 1.85rem; }
      .hero-desc { font-size: 1rem; }
      .hero-stats-grid { grid-template-columns: 1fr; }
      .cards-grid-3 { grid-template-columns: 1fr; }
      .scene-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .gallery-grid { grid-template-columns: 1fr; }
      .testimonial-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .review-summary-card { text-align: center; justify-content: center; }
    }