:root {
      --primary: #ff5500;
      --primary-hover: #e04a00;
      --primary-light: #fff3ed;
      --primary-glow: rgba(255, 85, 0, 0.15);
      --accent-warm: #ff8c00;
      --dark-text: #1a1e24;
      --body-text: #4a5568;
      --light-text: #718096;
      --border-color: #f0e6e0;
      --card-bg: #ffffff;
      --bg-page: #fdfbf9;
      --bg-alt: #fcf6f2;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(255, 85, 0, 0.05);
      --shadow-md: 0 10px 30px rgba(255, 85, 0, 0.08);
      --shadow-hover: 0 18px 40px rgba(255, 85, 0, 0.14);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    * {
      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, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--body-text);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 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: 0 2px 10px rgba(0, 0, 0, 0.02);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

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

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

    .brand-name span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--dark-text);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 50px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-warm) 100%);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 85, 0, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 85, 0, 0.4);
      color: #ffffff;
    }

    .btn-secondary {
      background-color: #ffffff;
      color: var(--dark-text);
      border-color: #e2e8f0;
    }

    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark-text);
      cursor: pointer;
    }

    /* 视觉修饰区 */
    .section-padding {
      padding: 80px 0;
    }

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

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background-color: var(--primary-light);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 16px;
    }

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

    /* 首屏 Hero */
    .hero-section {
      background: radial-gradient(circle at 50% 0%, #fff0e6 0%, var(--bg-page) 70%);
      padding: 90px 0 80px;
      text-align: center;
      position: relative;
    }

    .hero-inner {
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge-wrap {
      margin-bottom: 24px;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50px;
      font-size: 0.9rem;
      color: var(--dark-text);
      box-shadow: var(--shadow-sm);
    }

    .hero-pill-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }

    .hero-title {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary) 0%, #ff7700 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--body-text);
      max-width: 780px;
      margin: 0 auto 40px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-buttons .btn {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

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

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      font-family: inherit;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--light-text);
      font-weight: 500;
    }

    /* 平台核心矩阵 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(255, 85, 0, 0.4);
    }

    .feature-icon-box {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .feature-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .feature-link:hover {
      gap: 10px;
    }

    /* 支持模型标签云 */
    .model-cloud-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }

    .model-tag {
      padding: 8px 18px;
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-text);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: scale(1.05);
    }

    /* 标准制作流程 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .process-step-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(255, 85, 0, 0.2);
      line-height: 1;
      margin-bottom: 12px;
    }

    .process-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .process-card p {
      font-size: 0.9rem;
      color: var(--light-text);
      line-height: 1.6;
    }

    /* 案例展示区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .case-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .case-img-wrap {
      width: 100%;
      height: 260px;
      background: #f0f0f0;
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 28px;
    }

    .case-content h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .case-content p {
      font-size: 0.95rem;
      color: var(--body-text);
      margin-bottom: 16px;
    }

    .case-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .case-tag {
      font-size: 0.8rem;
      padding: 4px 10px;
      background: var(--bg-alt);
      color: var(--primary);
      border-radius: 4px;
      font-weight: 600;
    }

    /* 对比评测表格 */
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
      padding: 24px;
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff7f2 0%, #ffefe5 100%);
      border: 1px solid #ffd8c2;
      border-radius: var(--radius-md);
      padding: 24px 30px;
      margin-bottom: 24px;
    }

    .score-left h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .score-left p {
      font-size: 0.95rem;
      color: var(--body-text);
    }

    .score-right {
      text-align: right;
    }

    .score-val {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-val span {
      font-size: 1.1rem;
      color: var(--light-text);
    }

    .score-stars {
      color: #ff9800;
      font-size: 1.1rem;
      margin-top: 4px;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #edf2f7;
      font-size: 0.95rem;
    }

    .eval-table th {
      background: #fafafa;
      color: var(--dark-text);
      font-weight: 700;
    }

    .eval-table .highlight-col {
      background: #fffcf9;
      font-weight: 700;
      color: var(--primary);
    }

    /* 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-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .review-card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 85, 0, 0.3);
      transform: translateY(-3px);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .avatar-placeholder {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-warm) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-info h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-text);
    }

    .user-info p {
      font-size: 0.85rem;
      color: var(--light-text);
    }

    .review-body {
      font-size: 0.95rem;
      color: var(--body-text);
      line-height: 1.65;
      font-style: italic;
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-text);
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

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

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #fffdfc;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      border-top: 1px solid var(--border-color);
    }

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

    /* 需求匹配与表单区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-col h3 {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .contact-info-col p {
      font-size: 0.98rem;
      color: var(--body-text);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-meta-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 30px;
    }

    .meta-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--dark-text);
    }

    .meta-label {
      font-weight: 700;
      color: var(--primary);
    }

    .qr-box {
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      border-radius: var(--radius-sm);
      display: block;
      margin-bottom: 8px;
    }

    .qr-box span {
      font-size: 0.85rem;
      color: var(--light-text);
      font-weight: 500;
    }

    .form-col {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcdfe6;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #ffffff;
      color: var(--dark-text);
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 资讯与友情链接 */
    .article-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item a {
      display: block;
      padding: 14px 18px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-text);
      text-overflow: ellipsis;
      overflow: hidden;
      white-space: nowrap;
    }

    .article-item a:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #ffffff;
    }

    .footer-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      padding: 24px 0;
      border-top: 1px solid #eaeaea;
    }

    .footer-links-wrap a {
      font-size: 0.88rem;
      color: var(--light-text);
      padding: 4px 8px;
      border-radius: 4px;
    }

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

    /* 页脚 */
    .site-footer {
      background: #191c21;
      color: #a0aec0;
      padding: 60px 0 30px;
      font-size: 0.92rem;
    }

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

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 20px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a {
      color: #a0aec0;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      color: #718096;
      font-size: 0.85rem;
    }

    /* 悬浮客服 */
    .floating-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .kefu-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent-warm) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(255, 85, 0, 0.4);
      cursor: pointer;
      position: relative;
    }

    .kefu-popup {
      position: absolute;
      right: 64px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-hover);
      display: none;
      width: 170px;
      text-align: center;
    }

    .kefu-popup img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-sm);
      margin-bottom: 6px;
      display: block;
    }

    .kefu-popup span {
      font-size: 0.8rem;
      color: var(--dark-text);
      font-weight: 600;
    }

    .kefu-btn:hover .kefu-popup {
      display: block;
    }

    /* 响应式样式 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.4rem;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .section-padding {
        padding: 50px 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }