:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #f97316;
      --accent-hover: #ea580c;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-white: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --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, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
    }

    body {
      line-height: 1.6;
      background-color: var(--bg-main);
      color: var(--text-main);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .logo-container {
      height: 40px;
      display: flex;
      align-items: center;
    }

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

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

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.925rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links li 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 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }

    .btn-accent {
      background: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }

    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

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

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

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

    /* 首屏 Hero 区域 (无图片) */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-main) 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: var(--primary-light);
      color: var(--primary);
      border: 1px solid rgba(37, 99, 235, 0.2);
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      max-width: 780px;
      margin: 0 auto 36px;
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    .btn-hero-official {
      font-size: 1.1rem;
      padding: 14px 32px;
      background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
    }

    .btn-hero-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(37, 99, 235, 0.35);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: left;
    }

    .hero-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .hero-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .hero-card-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 16px;
    }

    .hero-card-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .hero-card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 通用分节样式 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-block.bg-alt {
      background-color: var(--bg-alt);
    }

    .section-block.bg-white {
      background-color: var(--bg-white);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-subtitle {
      font-size: 0.875rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary);
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-intro {
      font-size: 1rem;
      color: var(--text-muted);
    }

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

    .about-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 20px;
      font-size: 0.975rem;
    }

    .about-features {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 28px;
    }

    .about-features li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.925rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .about-features li span {
      color: var(--primary);
      font-weight: 800;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 12px;
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .media-card img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      display: block;
    }

    /* 模型矩阵与支持生态 */
    .models-badge-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-muted);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
      transform: translateY(-2px);
    }

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

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

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      border-color: rgba(37, 99, 235, 0.4);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .service-card-top {
      margin-bottom: 16px;
    }

    .service-badge {
      display: inline-block;
      padding: 4px 10px;
      font-size: 0.75rem;
      font-weight: 700;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }

    .service-card h4 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    .service-card-link {
      margin-top: 16px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .service-card-link:hover {
      color: var(--primary-hover);
    }

    /* 对比评测模块 */
    .review-highlight {
      background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .review-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-circle {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.75rem;
      font-weight: 800;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

    .score-text h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .score-text p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.925rem;
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .col-highlight {
      background: rgba(37, 99, 235, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-num {
      font-size: 2rem;
      font-weight: 800;
      color: rgba(37, 99, 235, 0.2);
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 案例展示 */
    .case-media-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 32px;
    }

    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

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

    .banner-gallery-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

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

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

    .testimonial-quote {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
    }

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

    .user-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }

    .user-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 区域 */
    .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-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: background-color 0.2s ease;
    }

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

    .faq-icon {
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

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

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0;
    }

    .contact-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
    }

    .contact-list strong {
      min-width: 80px;
      color: var(--text-muted);
    }

    .qr-box {
      margin-top: 20px;
      text-align: center;
      padding: 16px;
      background: var(--bg-alt);
      border-radius: var(--radius-md);
      display: inline-block;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      border-radius: var(--radius-sm);
      display: block;
      margin: 0 auto 8px;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #ffffff;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    /* 资讯与友情链接 */
    .articles-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      margin-bottom: 24px;
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
    }

    .article-link-tag {
      padding: 6px 14px;
      background: var(--bg-alt);
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      color: var(--primary);
      font-weight: 500;
    }

    .article-link-tag:hover {
      background: var(--primary-light);
    }

    .friend-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 12px;
    }

    .friend-links-list a {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-info p {
      font-size: 0.875rem;
      color: var(--text-light);
    }

    .footer-nav {
      display: flex;
      gap: 20px;
    }

    .footer-nav a {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      font-size: 1.25rem;
      border: none;
      transition: transform 0.2s ease, background-color 0.2s ease;
    }

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

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonials-grid {
        grid-template-columns: 1fr;
      }
      .about-layout {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .banner-gallery {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-3,
      .cards-grid-4 {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .case-media-grid {
        grid-template-columns: 1fr;
      }
      .banner-gallery {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
      }
    }