:root {
      --primary: #00b894;
      --primary-dark: #008f72;
      --primary-light: #e6f9f4;
      --primary-subtle: #f0fdf9;
      --secondary: #0984e3;
      --accent: #55efc4;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --bg-body: #f7fbf9;
      --bg-card: #ffffff;
      --border-color: #d1fae5;
      --border-light: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(0, 184, 148, 0.06);
      --shadow-md: 0 8px 24px rgba(0, 184, 148, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 184, 148, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      background-image: radial-gradient(#d1fae5 0.75px, transparent 0.75px), radial-gradient(#e6f9f4 0.75px, var(--bg-body) 0.75px);
      background-size: 30px 30px;
      background-position: 0 0, 15px 15px;
    }

    a {
      color: var(--primary-dark);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary);
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-meta {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.2px;
    }
    .brand-badge {
      font-size: 11px;
      color: var(--primary-dark);
      background: var(--primary-light);
      padding: 1px 6px;
      border-radius: 4px;
      font-weight: 600;
      width: fit-content;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-weight: 500;
      color: var(--text-main);
      font-size: 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(0, 184, 148, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--primary);
      color: var(--primary-dark) !important;
    }
    .btn-outline:hover {
      background: var(--primary-light);
    }
    .btn-secondary-light {
      background: #f1f5f9;
      color: var(--text-main) !important;
      border-color: var(--border-light);
    }
    .btn-secondary-light:hover {
      background: #e2e8f0;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 章节通用 */
    section {
      padding: 70px 0;
      position: relative;
    }
    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }
    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* Hero 首屏 - 无图片要求 */
    .hero-section {
      padding: 85px 0 75px;
      background: linear-gradient(175deg, #f0fdf4 0%, #ecfdf5 50%, var(--bg-body) 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      margin-bottom: 24px;
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
    }
    .hero-eyebrow-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 184, 148, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 184, 148, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 184, 148, 0); }
    }
    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-main {
      padding: 13px 32px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
    }
    .btn-hero-sub {
      padding: 13px 26px;
      font-size: 16px;
      font-weight: 600;
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-main) !important;
      box-shadow: var(--shadow-sm);
    }
    .btn-hero-sub:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary-dark) !important;
    }
    .hero-model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      padding: 20px;
      background: rgba(255, 255, 255, 0.8);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .model-chip {
      font-size: 12px;
      background: #ffffff;
      color: var(--text-main);
      padding: 4px 10px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      font-weight: 500;
    }
    .model-chip.highlight {
      background: var(--primary-light);
      color: var(--primary-dark);
      border-color: var(--border-color);
      font-weight: 700;
    }

    /* 数据指标 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -35px;
      position: relative;
      z-index: 10;
    }
    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      text-align: center;
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 平台介绍 */
    .about-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .about-lead {
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-main);
      margin-bottom: 30px;
    }
    .about-features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .about-feat-item {
      padding: 20px;
      background: var(--primary-subtle);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .about-feat-item h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .about-feat-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* AIGC 服务与场景网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 26px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .service-tag {
      font-size: 11px;
      background: #f1f5f9;
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 图文案例展示 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 24px;
      align-items: center;
      margin-bottom: 40px;
    }
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-card-img-wrap {
      width: 100%;
      background: #f8fafc;
      display: block;
    }
    .media-card-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .media-card-content {
      padding: 24px;
    }
    .media-card-content h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .media-card-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .flow-badge {
      font-size: 12px;
      font-weight: 800;
      color: var(--primary);
      background: var(--primary-light);
      padding: 3px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .flow-step-item h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .flow-step-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格 */
    .review-highlight {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #00b894 0%, #008f72 100%);
      color: #ffffff;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
    }
    .review-score {
      font-size: 38px;
      font-weight: 900;
      line-height: 1;
    }
    .review-stars {
      color: #f6e58d;
      font-size: 20px;
      margin-bottom: 4px;
    }
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
    }
    .compare-table th {
      background: var(--primary-subtle);
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.brand-col {
      font-weight: 700;
      color: var(--primary-dark);
      background: rgba(0, 184, 148, 0.04);
    }

    /* 用户评论 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: normal;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #e2e8f0;
      padding-top: 16px;
    }
    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }
    .user-info h3 {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 2px;
    }
    .user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-header:hover {
      color: var(--primary-dark);
    }
    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-body {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-body {
      display: block;
    }

    /* 需求匹配与表单 */
    .form-section-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: flex-start;
    }
    .form-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background-color: #f8fafc;
      transition: var(--transition);
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 184, 148, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .contact-info-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .contact-detail-list {
      list-style: none;
      margin-top: 24px;
    }
    .contact-detail-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-light);
      font-size: 14px;
    }
    .qr-wrapper {
      margin-top: 24px;
      text-align: center;
      padding: 20px;
      background: var(--primary-subtle);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .qr-wrapper img {
      width: 140px;
      height: 140px;
      margin: 0 auto 10px;
      display: block;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
      background: #ffffff;
    }

    /* 文章与百科 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .article-list li a {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-main);
      font-size: 14px;
      padding: 8px 12px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }
    .article-list li a:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary-dark);
    }
    .article-dynamic-container {
      margin-top: 16px;
      padding: 16px;
      background: var(--primary-subtle);
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 底部通用规范 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-main);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .footer-col p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      list-style: none;
    }
    .friend-links-list a {
      font-size: 13px;
      color: var(--text-muted);
      background: #f1f5f9;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .friend-links-list a:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 浮动工具 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 44px;
      height: 44px;
      background: #ffffff;
      color: var(--primary-dark);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 13px;
      font-weight: 700;
      transition: var(--transition);
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 30px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); margin-top: 20px; }
      .about-features-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .testimonial-grid { grid-template-columns: 1fr; }
      .form-section-layout { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
      .media-showcase-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .site-header { position: relative; }
      .mobile-menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { display: block; padding: 10px 0; }
      .header-actions { display: none; }
      .hero-title { font-size: 24px; }
      .hero-desc { font-size: 15px; }
      .service-grid { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
      .metrics-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }