/* 全局鲜黄耀眼视觉基调 (Yellow Vibrant Tech) */
    :root {
      --primary-yellow: #FFC700;
      --yellow-bright: #FFE600;
      --yellow-hover: #E5B200;
      --yellow-light: #FFF9E5;
      --bg-main: #FAFAFB;
      --bg-card: #FFFFFF;
      --text-dark: #121316;
      --text-muted: #585A65;
      --text-light: #8C8E9A;
      --border-color: #E2E4E9;
      --border-dark: #121316;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --shadow-yellow: 0 8px 25px rgba(255, 199, 0, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --max-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    /* 统一布局容器 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 通用排版样式 */
    h1, h2, h3, h4 {
      color: var(--text-dark);
      font-weight: 700;
      line-height: 1.3;
    }

    p {
      color: var(--text-muted);
      font-size: 1rem;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    ul {
      list-style: none;
    }

    /* 强调文字与高亮 */
    .highlight-yellow {
      background: var(--primary-yellow);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      color: var(--text-dark);
      font-weight: 700;
      display: inline-block;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
      gap: 8px;
    }

    .btn-yellow {
      background-color: var(--primary-yellow);
      color: var(--text-dark);
      border-color: var(--text-dark);
      box-shadow: 3px 3px 0px var(--text-dark);
    }

    .btn-yellow:hover {
      background-color: var(--yellow-bright);
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--text-dark);
    }

    .btn-dark {
      background-color: var(--text-dark);
      color: var(--primary-yellow);
      border-color: var(--text-dark);
      box-shadow: 3px 3px 0px var(--primary-yellow);
    }

    .btn-dark:hover {
      background-color: #24262D;
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--primary-yellow);
    }

    .btn-outline {
      background-color: transparent;
      color: var(--text-dark);
      border: 2px solid var(--text-dark);
    }

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

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(250, 250, 251, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--text-dark);
    }

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

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

    .logo-box img {
      height: 40px;
      width: auto;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    /* 规则要求: .nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
    }

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

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

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

    /* Section 通用 Header */
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-yellow);
      color: var(--text-dark);
      border: 1.5px solid var(--text-dark);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 800;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      margin-bottom: 12px;
    }

    .section-subtitle {
      max-width: 680px;
      margin: 0 auto;
      font-size: 1.05rem;
    }

    /* 全局区块间距 */
    section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    /* 首屏 HERO 区域（严格不得有图片） */
    .hero-section {
      padding: 80px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(255, 199, 0, 0.25) 0%, rgba(250, 250, 251, 0) 60%);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background-color: var(--text-dark);
      color: var(--primary-yellow);
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      margin-bottom: 20px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.2rem;
      max-width: 780px;
      margin: 0 auto 36px;
      color: var(--text-muted);
    }

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

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

    .stat-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: 4px 4px 0px var(--primary-yellow);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--text-dark);
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
      margin-top: 4px;
    }

    /* 关于我们 / 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card-box {
      background: var(--primary-yellow);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 6px 6px 0px var(--text-dark);
    }

    .about-card-box h3 {
      font-size: 1.6rem;
      margin-bottom: 16px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag {
      background: var(--bg-card);
      border: 1px solid var(--text-dark);
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 700;
    }

    /* AIGC 服务能力 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 4px 4px 0px rgba(0,0,0,0.05);
      transition: all 0.3s ease;
      position: relative;
    }

    .service-card:hover {
      box-shadow: 6px 6px 0px var(--primary-yellow);
      transform: translateY(-3px);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-yellow);
      border: 1.5px solid var(--text-dark);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.95rem;
      line-height: 1.5;
    }

    /* 一站式制作 */
    .one-stop-box {
      background: #FFFFFF;
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: 6px 6px 0px var(--primary-yellow);
    }

    .feature-list-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .feature-item {
      display: flex;
      gap: 16px;
      padding: 16px;
      background: var(--bg-main);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .feature-num {
      background: var(--text-dark);
      color: var(--primary-yellow);
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      flex-shrink: 0;
    }

    /* 行业方案 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 28px;
    }

    .solution-card h3 {
      border-bottom: 2px solid var(--primary-yellow);
      padding-bottom: 10px;
      margin-bottom: 14px;
    }

    /* 服务网络与流程 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .process-step {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      position: relative;
    }

    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary-yellow);
      border: 2px solid var(--text-dark);
      border-radius: 50%;
      margin: 0 auto 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
    }

    /* 案例中心 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .case-img-box {
      width: 100%;
      background: #EAEAEA;
      border-bottom: 2px solid var(--text-dark);
      text-align: center;
    }

    .case-img-box img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .case-info {
      padding: 20px;
    }

    .case-tag {
      font-size: 0.75rem;
      font-weight: 800;
      background: var(--primary-yellow);
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--text-dark);
    }

    .banner-media-container {
      display: flex;
      gap: 20px;
      margin-top: 30px;
      flex-wrap: wrap;
    }

    .banner-media-container img {
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      box-shadow: 4px 4px 0px var(--primary-yellow);
    }

    /* 对比评测表 */
    .comparison-wrapper {
      overflow-x: auto;
    }

    .rating-banner {
      background: var(--primary-yellow);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 4px 4px 0px var(--text-dark);
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 900;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
    }

    .comparison-table th {
      background: #F0F1F5;
      font-weight: 800;
    }

    .comparison-table tr:hover {
      background: var(--yellow-light);
    }

    .highlight-cell {
      background: rgba(255, 199, 0, 0.15);
      font-weight: 700;
    }

    /* 需求匹配与 Token 比价 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 30px;
      position: relative;
    }

    .price-card.featured {
      background: var(--yellow-light);
      border: 3px solid var(--text-dark);
      box-shadow: 6px 6px 0px var(--text-dark);
    }

    .price-val {
      font-size: 2.2rem;
      font-weight: 900;
      margin: 16px 0;
    }

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #FFFFFF;
    }

    .faq-question:hover {
      background: var(--yellow-light);
    }

    .faq-toggle-icon {
      font-size: 1.3rem;
      font-weight: 900;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #FAFAFA;
      padding: 0 24px;
      color: var(--text-muted);
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px;
      border-top-color: var(--border-color);
    }

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

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 4px 4px 0px rgba(0,0,0,0.05);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      background: var(--primary-yellow);
      border: 1.5px solid var(--text-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .reviewer-info h4 {
      font-size: 1rem;
    }

    .reviewer-info p {
      font-size: 0.8rem;
    }

    /* AI百科与资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 30px;
    }

    .article-links-box {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-list li {
      padding: 12px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .article-list li:last-child {
      border-bottom: none;
    }

    .article-list a {
      font-weight: 600;
      color: var(--text-dark);
    }

    .article-list a:hover {
      color: var(--yellow-hover);
      text-decoration: underline;
    }

    /* 表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
    }

    .contact-info-card {
      background: var(--text-dark);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 6px 6px 0px var(--primary-yellow);
    }

    .contact-info-card h3 {
      color: var(--primary-yellow);
      font-size: 1.6rem;
      margin-bottom: 20px;
    }

    .contact-info-card p {
      color: #D1D5DB;
      margin-bottom: 12px;
    }

    .qr-box {
      margin-top: 24px;
      background: #FFFFFF;
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      display: block;
    }

    .qr-box span {
      font-size: 0.85rem;
      color: var(--text-dark);
      font-weight: 700;
      margin-top: 6px;
      display: block;
    }

    .form-card {
      background: var(--bg-card);
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: 6px 6px 0px var(--primary-yellow);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--text-dark);
      border-radius: var(--radius-sm);
      font-size: 1rem;
      background: #FFFFFF;
    }

    .form-control:focus {
      outline: none;
      background: var(--yellow-light);
    }

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

    /* 友情链接区 */
    .links-section {
      background: #FFFFFF;
      padding: 40px 0;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links a {
      background: var(--bg-main);
      border: 1px solid var(--text-dark);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-weight: 600;
    }

    .friend-links a:hover {
      background: var(--primary-yellow);
    }

    /* 页脚 (明确颜色指定) */
    .site-footer {
      background-color: #121316;
      color: #E2E4E9;
      padding: 60px 0 30px;
      border-top: 3px solid var(--primary-yellow);
    }

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

    .footer-brand h4 {
      color: var(--primary-yellow);
      font-size: 1.4rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      color: #9CA3AF;
      max-width: 400px;
    }

    .footer-links h5 {
      color: #FFFFFF;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }

    .footer-links ul li {
      margin-bottom: 10px;
    }

    .footer-links ul a {
      color: #9CA3AF;
      font-size: 0.95rem;
    }

    .footer-links ul a:hover {
      color: var(--primary-yellow);
    }

    .footer-bottom {
      border-top: 1px solid #2D3139;
      padding-top: 24px;
      text-align: center;
      font-size: 0.9rem;
      color: #6B7280;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      background: var(--primary-yellow);
      border: 2px solid var(--text-dark);
      border-radius: 50px;
      padding: 12px 20px;
      font-weight: 800;
      box-shadow: 4px 4px 0px var(--text-dark);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }

    .float-kefu:hover {
      transform: scale(1.05);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid, .solutions-grid, .cases-grid, .pricing-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .contact-wrapper, .news-grid, .footer-content {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--text-dark);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-stats-grid, .solutions-grid, .cases-grid, .pricing-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }
    }