:root {
      --c-primary: #d62027;
      --c-primary-hover: #b8161d;
      --c-primary-light: #fff0f1;
      --c-secondary: #e65100;
      --c-accent: #ff784e;
      --c-dark: #1f2329;
      --c-muted: #5c6470;
      --c-light: #fbfbfd;
      --c-border: #f0d5d7;
      --c-card-bg: #ffffff;
      --shadow-sm: 0 2px 8px rgba(214, 32, 39, 0.06);
      --shadow-md: 0 8px 24px rgba(214, 32, 39, 0.08);
      --shadow-lg: 0 16px 36px rgba(214, 32, 39, 0.12);
      --radius: 12px;
    }
    * { 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: #fff9f9;
      color: var(--c-dark);
      line-height: 1.65;
      overflow-x: hidden;
    }
    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    .site-container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: 8px;
      padding: 12px 28px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
      gap: 8px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #e52d27 0%, #b31217 100%);
      color: #ffffff;
      box-shadow: 0 6px 18px rgba(229, 45, 39, 0.35);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #d62027 0%, #9e0e13 100%);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(229, 45, 39, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      color: var(--c-primary);
      border-color: var(--c-primary);
    }
    .btn-outline:hover {
      background: var(--c-primary-light);
      transform: translateY(-2px);
    }
    .btn-lg {
      padding: 16px 36px;
      font-size: 1.125rem;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      color: var(--c-primary);
      background-color: var(--c-primary-light);
      font-size: 0.875rem;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 30px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
      border: 1px solid #ffd4d6;
    }
    .section-heading {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--c-dark);
      line-height: 1.3;
    }
    .section-subheading {
      font-size: 1.05rem;
      color: var(--c-muted);
      max-width: 680px;
      margin: 12px auto 0;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      width: 140px;
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--c-dark);
      padding: 8px 14px;
      border-radius: 6px;
    }
    .nav-links li a:hover {
      color: var(--c-primary);
      background: var(--c-primary-light);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    /* 首屏 HERO - 纯CSS科技感，无图片 */
    .hero-section {
      padding: 90px 0 80px;
      background: radial-gradient(circle at 50% 20%, #ffebee 0%, #fff7f7 50%, #ffffff 100%);
      position: relative;
      text-align: center;
      border-bottom: 1px solid var(--c-border);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      border: 1px solid #ffccd0;
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      color: var(--c-primary);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      background: var(--c-primary);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(214, 32, 39, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(214, 32, 39, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(214, 32, 39, 0); }
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--c-dark);
      max-width: 960px;
      margin: 0 auto 20px;
      letter-spacing: -0.5px;
    }
    .hero-title-highlight {
      color: var(--c-primary);
      background: linear-gradient(135deg, #e52d27 0%, #b31217 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--c-muted);
      max-width: 760px;
      margin: 0 auto 36px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-features-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .hero-stat-card {
      background: #ffffff;
      border: 1px solid #f6d8da;
      padding: 24px 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .hero-stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #fca5a5;
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--c-primary);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--c-muted);
      font-weight: 500;
    }

    /* 平台核心能力概览与模型支持云 */
    .model-tags-wrapper {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 40px;
    }
    .model-tags-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--c-dark);
      margin-bottom: 18px;
      text-align: center;
    }
    .tags-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .tag-item {
      background: var(--c-primary-light);
      border: 1px solid #ffd4d6;
      color: #901116;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: all 0.2s ease;
    }
    .tag-item:hover {
      background: var(--c-primary);
      color: #fff;
      transform: translateY(-2px);
    }

    /* 卡片通用网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    /* 服务与一站式制作卡片 */
    .service-card {
      background: #ffffff;
      border: 1px solid #fae1e3;
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #f87171;
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, #ffebee 0%, #ffd4d6 100%);
      color: var(--c-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      margin-bottom: 20px;
      font-size: 1.5rem;
    }
    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--c-dark);
    }
    .service-desc {
      font-size: 0.95rem;
      color: var(--c-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .service-feature-list {
      list-style: none;
      border-top: 1px dashed var(--c-border);
      padding-top: 14px;
      font-size: 0.875rem;
      color: #4b5563;
    }
    .service-feature-list li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .service-feature-list li::before {
      content: "•";
      color: var(--c-primary);
      font-weight: bold;
    }

    /* 对比评测卡片与表格 */
    .review-highlight-card {
      background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
      border: 2px solid #ffccd0;
      border-radius: var(--radius);
      padding: 32px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-badge-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--c-primary);
      line-height: 1;
    }
    .score-info h4 {
      font-size: 1.3rem;
      margin-bottom: 4px;
    }
    .stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #fce7e8;
    }
    .custom-table th {
      background-color: #fff1f2;
      color: var(--c-dark);
      font-weight: 700;
    }
    .custom-table tbody tr:last-child td {
      border-bottom: none;
    }
    .custom-table tbody tr:hover {
      background-color: #fffafb;
    }
    .table-highlight {
      color: var(--c-primary);
      font-weight: 700;
      background-color: rgba(255, 241, 242, 0.4);
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--c-primary);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--c-muted);
    }

    /* 案例展示区图片容器 */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-card-img {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f3f4f6;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .media-card-img.square {
      aspect-ratio: 1 / 1;
    }
    .media-card-body {
      padding: 20px;
    }
    .media-card-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .media-card-desc {
      font-size: 0.875rem;
      color: var(--c-muted);
    }

    /* 客户评价网格 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid #fae1e3;
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: #374151;
      margin-bottom: 16px;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #fce7e8;
      padding-top: 12px;
    }
    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #d62027, #f87171);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .author-name {
      font-size: 0.95rem;
      font-weight: 700;
    }
    .author-role {
      font-size: 0.8rem;
      color: var(--c-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: 8px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item.active {
      border-color: var(--c-primary);
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--c-primary);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-question::after {
      content: "-";
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--c-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 200px;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d1d5db;
      border-radius: 6px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
      background: #fff;
    }
    .form-control:focus {
      border-color: var(--c-primary);
      box-shadow: 0 0 0 3px rgba(214, 32, 39, 0.1);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .contact-info-panel {
      background: linear-gradient(135deg, #fff5f5 0%, #fffbfb 100%);
      padding: 30px;
      border-radius: 8px;
      border: 1px solid #ffd4d6;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-list {
      list-style: none;
      margin-top: 16px;
    }
    .contact-info-list li {
      margin-bottom: 14px;
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.95rem;
    }
    .qrcode-box {
      margin-top: 20px;
      text-align: center;
      background: #ffffff;
      padding: 16px;
      border-radius: 8px;
      border: 1px solid var(--c-border);
      display: inline-block;
      max-width: 160px;
    }

    /* 文章与友情链接 */
    .article-links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-chip {
      background: #ffffff;
      border: 1px solid #ffd4d6;
      color: #374151;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.9rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .article-chip:hover {
      background: var(--c-primary-light);
      color: var(--c-primary);
      border-color: var(--c-primary);
    }
    .friend-links-box {
      border-top: 1px solid #ffd4d6;
      padding-top: 24px;
      margin-top: 40px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .friend-links-box a {
      font-size: 0.875rem;
      color: var(--c-muted);
    }
    .friend-links-box a:hover {
      color: var(--c-primary);
    }

    /* 底部通用规范 */
    .site-footer {
      background-color: #1a1a1a;
      color: #9ca3af;
      padding: 60px 0 30px;
      border-top: 4px solid var(--c-primary);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #9ca3af;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #2d2d2d;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 浮动工具栏 */
    .float-toolbar {
      position: fixed;
      right: 24px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid #ffccd0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      color: var(--c-primary);
      cursor: pointer;
      font-size: 1.1rem;
      transition: all 0.2s ease;
    }
    .float-btn:hover {
      background: var(--c-primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式断点控制 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-features-strip { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 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: 20px 0;
        border-bottom: 1px solid var(--c-border);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show { display: flex; }
      .hero-title { font-size: 1.85rem; }
      .grid-3, .grid-4, .grid-2, .steps-grid, .hero-features-strip {
        grid-template-columns: 1fr;
      }
      .footer-grid { grid-template-columns: 1fr; }
      .score-badge-wrap { flex-direction: column; align-items: flex-start; }
      .section-wrap { padding: 50px 0; }
    }