:root {
      --primary: #e6005c;
      --primary-hover: #c4004e;
      --primary-light: #fff0f5;
      --primary-gradient: linear-gradient(135deg, #e6005c 0%, #ff4d94 100%);
      --accent: #ff007f;
      --text-main: #1f1f2e;
      --text-sub: #5c5c70;
      --text-muted: #8c8ca1;
      --bg-main: #faf9fb;
      --bg-card: #ffffff;
      --border-color: #f1d7e2;
      --border-hover: #ff99c2;
      --shadow-sm: 0 4px 12px rgba(230, 0, 92, 0.05);
      --shadow-md: 0 8px 24px rgba(230, 0, 92, 0.08);
      --shadow-lg: 0 12px 36px rgba(230, 0, 92, 0.12);
      --max-width: 1200px;
      --radius: 12px;
      --transition: all 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      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, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: 0.5px;
    }

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

    .nav-links a {
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: 6px;
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(230, 0, 92, 0.28);
    }

    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(230, 0, 92, 0.35);
    }

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

    .btn-outline:hover {
      background: var(--primary-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #ffe6f0 0%, #faf9fb 70%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 0.875rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      color: #11111a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 780px;
      margin: 0 auto 36px;
    }

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

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

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

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-sub);
    }

    /* 通用章节样式 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 750;
      color: #151520;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-sub);
      max-width: 640px;
      margin: 0 auto;
    }

    /* 平台介绍 & 核心能力 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      padding: 32px 28px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .feature-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: #1a1a24;
      margin-bottom: 10px;
    }

    .feature-text {
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 模型矩阵标签云 */
    .model-matrix-box {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      margin-top: 40px;
    }

    .model-matrix-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
      text-align: center;
    }

    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      background: #fff5f8;
      border: 1px solid var(--border-color);
      color: #333344;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      transition: var(--transition);
    }

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

    /* 图文场景展示 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

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

    .media-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--border-hover);
    }

    .media-img-wrapper {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #eee;
      overflow: hidden;
    }

    .media-img-wrapper.square {
      aspect-ratio: 1 / 1;
    }

    .media-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .media-card:hover .media-img-wrapper img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #1a1a24;
      margin-bottom: 8px;
    }

    .media-card-desc {
      font-size: 0.875rem;
      color: var(--text-sub);
    }

    /* 场景矩阵条目 */
    .scene-items-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 16px;
      margin-top: 40px;
    }

    .scene-item-box {
      background: #ffffff;
      padding: 16px 18px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      display: flex;
      align-items: flex-start;
      gap: 12px;
      transition: var(--transition);
    }

    .scene-item-box:hover {
      border-color: var(--primary);
      background: #fffbfd;
    }

    .scene-item-bullet {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      margin-top: 6px;
      flex-shrink: 0;
    }

    .scene-item-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #222233;
      margin-bottom: 2px;
    }

    .scene-item-desc {
      font-size: 0.825rem;
      color: var(--text-sub);
      line-height: 1.45;
    }

    /* 标准制作流程 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      padding: 30px 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .flow-step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .flow-step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1a1a24;
    }

    .flow-step-desc {
      font-size: 0.875rem;
      color: var(--text-sub);
    }

    /* 对比评测表格 */
    .comparison-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .rating-banner {
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-info-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .rating-score {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }

    .rating-meta-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #1a1a24;
      margin-bottom: 4px;
    }

    .rating-stars {
      color: #ff9900;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 640px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .comparison-table th {
      background: #faf7f9;
      color: #333344;
      font-weight: 700;
    }

    .comparison-table td.highlight {
      background: #fff8fa;
      color: var(--primary);
      font-weight: 600;
    }

    /* Token 比价列表 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }

    .token-card:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .token-model-name {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .token-save-badge {
      display: inline-block;
      font-size: 0.75rem;
      padding: 3px 10px;
      background: #ffe6ef;
      color: var(--primary);
      border-radius: 12px;
      font-weight: 600;
      margin-bottom: 14px;
    }

    .token-desc {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 真实用户评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .review-text {
      font-size: 0.95rem;
      color: #333344;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f9ebf1;
      padding-top: 12px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #11111a;
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #1a1a24;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fffdfd;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 需求表单与联系 */
    .form-contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-col h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: #11111a;
    }

    .contact-info-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-info-list li {
      margin-bottom: 12px;
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    .contact-info-list strong {
      color: #11111a;
      width: 90px;
      display: inline-block;
    }

    .qrcode-box {
      border: 1px dashed var(--border-color);
      padding: 16px;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
      background: #fffbfd;
    }

    .qrcode-box img {
      width: 130px;
      height: 130px;
      display: block;
      margin: 0 auto 8px;
    }

    .qrcode-box span {
      font-size: 0.8rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    .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: #333344;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border-radius: 6px;
      border: 1px solid #ddd;
      font-size: 0.95rem;
      color: #333;
      transition: var(--transition);
      background: #ffffff;
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(230, 0, 92, 0.12);
    }

    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 友情链接与文章 */
    .links-articles-section {
      background: #fdf5f8;
      border-top: 1px solid var(--border-color);
      padding: 40px 0;
    }

    .links-block {
      margin-bottom: 24px;
    }

    .links-block h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #222233;
    }

    .links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .links-flex a {
      color: var(--text-sub);
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .links-flex a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 30px 0;
      text-align: center;
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .site-footer a {
      color: var(--text-sub);
      text-decoration: none;
      margin: 0 8px;
    }

    .site-footer a:hover {
      color: var(--primary);
    }

    /* 侧边浮动入口 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 990;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-size: 1.1rem;
      font-weight: bold;
      text-decoration: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-card-grid {
        grid-template-columns: 1fr;
      }
      .form-contact-container {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .header-actions .btn {
        padding: 8px 14px;
        font-size: 0.85rem;
      }
    }