:root {
      --primary-blue: #0b57d0;
      --primary-hover: #0842a0;
      --vibrant-blue: #1a73e8;
      --accent-cyan: #00d2ff;
      --text-main: #1f2328;
      --text-muted: #57606a;
      --text-light: #6e7781;
      --bg-page: #f8fafd;
      --bg-card: #ffffff;
      --bg-subtle: #edf3fc;
      --border-color: #d8e2f0;
      --border-focus: #8ab4f8;
      --shadow-sm: 0 2px 8px rgba(11, 87, 208, 0.06);
      --shadow-md: 0 8px 24px rgba(11, 87, 208, 0.1);
      --shadow-lg: 0 16px 36px rgba(11, 87, 208, 0.14);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
      --transition-fast: 0.25s ease;
    }

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

    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;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      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-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      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;
    }

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

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

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

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

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

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

    .nav-links li a:hover {
      color: var(--primary-blue);
      background-color: var(--bg-subtle);
    }

    .header-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: var(--radius-sm);
      cursor: pointer;
      transition: all var(--transition-fast);
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--vibrant-blue), var(--primary-blue));
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(11, 87, 208, 0.28);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-blue), var(--primary-hover));
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(11, 87, 208, 0.35);
    }

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

    .btn-outline:hover {
      background-color: var(--bg-subtle);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(180deg, #edf4fe 0%, #f8fafd 100%);
      padding: 70px 0 60px;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #e3eeff;
      border: 1px solid #c7dcfe;
      color: var(--primary-blue);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 20px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--vibrant-blue);
      border-radius: 50%;
    }

    .hero-title {
      font-size: 2.6rem;
      line-height: 1.25;
      font-weight: 800;
      color: #0d2149;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

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

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

    .stat-card {
      background: #ffffff;
      padding: 24px 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform var(--transition-fast);
    }

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

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-blue);
      margin-bottom: 4px;
      line-height: 1.1;
    }

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

    /* 通用章节样式 */
    .section-padding {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }

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

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: #0e203f;
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 平台介绍 & 核心优势 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: center;
    }

    .intro-text-block h3 {
      font-size: 1.5rem;
      color: #0e203f;
      margin-bottom: 16px;
    }

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

    .intro-feature-list {
      list-style: none;
      margin-top: 20px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .intro-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 500;
    }

    .intro-feature-item svg {
      width: 18px;
      height: 18px;
      fill: var(--primary-blue);
      flex-shrink: 0;
    }

    .model-tags-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-box h4 {
      font-size: 1.1rem;
      color: #0e203f;
      margin-bottom: 16px;
      font-weight: 700;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 10px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag-pill {
      background-color: var(--bg-subtle);
      border: 1px solid #d0e1fd;
      color: var(--primary-blue);
      padding: 5px 12px;
      font-size: 0.85rem;
      border-radius: 6px;
      font-weight: 500;
    }

    /* 服务与制作能力卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition-fast);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .card-icon-wrapper {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: linear-gradient(135deg, #e8f1ff, #cbe0fe);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: var(--primary-blue);
    }

    .card-icon-wrapper svg {
      width: 24px;
      height: 24px;
      fill: var(--primary-blue);
    }

    .service-card h3 {
      font-size: 1.2rem;
      color: #0e203f;
      margin-bottom: 10px;
      font-weight: 700;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-link {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-blue);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 案例图片专区 */
    .case-media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      align-items: stretch;
      margin-top: 30px;
    }

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

    .case-banner-box img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }

    .case-info {
      padding: 16px 20px;
      background: #ffffff;
    }

    .case-info h4 {
      font-size: 1.05rem;
      color: #0e203f;
      margin-bottom: 6px;
    }

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .rating-banner {
      background: linear-gradient(135deg, #0b57d0, #1a73e8);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1;
    }

    .rating-stars {
      color: #ffca28;
      font-size: 1.3rem;
      margin-top: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: #ffffff;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

    .compare-table th {
      background-color: var(--bg-subtle);
      font-weight: 700;
      color: #0e203f;
    }

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

    .highlight-col {
      background-color: #f3f7fd;
      font-weight: 600;
      color: var(--primary-blue);
    }

    /* 标准流程时间线 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 18px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      display: inline-block;
      width: 32px;
      height: 32px;
      line-height: 32px;
      background: var(--primary-blue);
      color: #ffffff;
      border-radius: 50%;
      text-align: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 12px;
    }

    .step-box h4 {
      font-size: 1.05rem;
      color: #0e203f;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .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;
    }

    .quote-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 18px;
      font-style: normal;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #eef2f7;
      padding-top: 14px;
    }

    .user-avatar-badge {
      width: 40px;
      height: 40px;
      background: var(--bg-subtle);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary-blue);
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
    }

    .user-info h5 {
      font-size: 0.95rem;
      color: #0e203f;
      font-weight: 700;
    }

    .user-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
      display: block;
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-question {
      width: 100%;
      padding: 16px 20px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 600;
      color: #0e203f;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .faq-question:hover {
      background-color: var(--bg-subtle);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform var(--transition-fast);
      color: var(--primary-blue);
    }

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

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

    .faq-answer-inner {
      padding: 0 20px 16px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 表单与需求匹配 */
    .form-contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-side-info h3 {
      font-size: 1.4rem;
      color: #0e203f;
      margin-bottom: 12px;
    }

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

    .contact-channels {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 24px;
    }

    .channel-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .qr-card-box {
      border: 1px dashed var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
      background: var(--bg-page);
      text-align: center;
      max-width: 220px;
    }

    .qr-card-box img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px;
      object-fit: cover;
      border-radius: 6px;
    }

    .form-block {
      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: #0e203f;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #ffffff;
      transition: border-color var(--transition-fast);
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-blue);
      box-shadow: 0 0 0 3px rgba(11, 87, 208, 0.12);
    }

    /* 资讯与友情链接 */
    .article-links-box, .friend-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
      box-shadow: var(--shadow-sm);
    }

    .article-links-box h4, .friend-links-box h4 {
      font-size: 1.05rem;
      color: #0e203f;
      margin-bottom: 14px;
      font-weight: 700;
    }

    .dynamic-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
    }

    .dynamic-links-list a {
      color: var(--primary-blue);
      font-size: 0.9rem;
      background: var(--bg-subtle);
      padding: 6px 14px;
      border-radius: 6px;
      transition: background-color var(--transition-fast);
    }

    .dynamic-links-list a:hover {
      background-color: #dbe8fe;
    }

    /* 页脚 */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 24px;
      margin-top: 60px;
    }

    .footer-inner {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 16px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 18px;
      list-style: none;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .footer-copy {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 浮动客服 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary-blue);
      color: #ffffff;
      width: 52px;
      height: 52px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      transition: transform var(--transition-fast);
    }

    .floating-kefu:hover {
      transform: scale(1.08);
    }

    .floating-kefu svg {
      width: 24px;
      height: 24px;
      fill: #ffffff;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .stats-grid, .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .form-contact-container, .case-media-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
    }

    @media (max-width: 768px) {
      .nav-wrapper {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-wrapper.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .mobile-menu-btn {
        display: block;
      }
      .cards-grid, .testimonials-grid, .stats-grid, .timeline-steps {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-section {
        padding: 45px 0;
      }
      .form-contact-container {
        padding: 24px;
      }
    }