/* UI-UX 视觉规范：Inter 字体（可选，需网络） */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

/* 基础样式 / Base Styles - 遵循 UI-UX 视觉规范 (Premium) */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #007BFF;
  --secondary-color: #28A745;
  /* 浅色模式：避免纯黑纯白，层次分明 */
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-color: var(--text-primary);
  --bg-body: #f9fafb;
  --bg-light: #f3f4f6;
  --bg-glass: rgba(255, 255, 255, 0.7);
  --bg-glass-hover: rgba(249, 250, 251, 0.95);
  --bg-dark: #1e293b;
  --border-color: #e5e7eb;
  --border-subtle: #f3f4f6;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --shadow-subtle: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06);
  --transition-ui: 0.2s ease-in-out;
}

/* 字体与排版 - 14px 正文、Inter/Geist 优先、中英支持 */
body {
  font-family: "Inter", "Geist Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "WenQuanYi Micro Hei", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  font-size: 14px;
  background: var(--bg-body);
}

/* 无障碍：跳过主内容链接 / Skip to main content (a11y) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  font-weight: 600;
}
.skip-link:focus,
.skip-link:focus-visible {
  left: 0;
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}
h1 { font-size: 1.875rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.125rem; }
h4, h5, h6 { font-size: 1rem; }

/* 容器 / Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部导航 - 玻璃感 + 1px 细边框 */
header {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-subtle);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 50px;
  width: auto;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: color var(--transition-ui), background-color var(--transition-ui);
  white-space: nowrap;
}

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

.nav-links a:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* 导航切换按钮 / Navigation Toggle Button */
.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-color);
  margin: 3px 0;
  transition: 0.3s;
}

/* 页面头部 - 主标题 1.875rem，留白透气 */
.page-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
  color: #f8fafc;
  padding: 3rem 0;
  text-align: center;
  margin-bottom: 3rem;
}

.page-header h1 {
  font-size: 1.875rem;
  margin-bottom: 1rem;
  color: #f8fafc;
  letter-spacing: -0.025em;
}

.page-header p {
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  opacity: 0.95;
}

/* 主要内容区域 / Main Content */
main {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

.content-section {
  margin: 3rem 0;
}

.content-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  letter-spacing: -0.025em;
}

/* 按钮 - rounded-lg、200ms 过渡 */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  transition: background-color var(--transition-ui), color var(--transition-ui), transform var(--transition-ui), box-shadow var(--transition-ui);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #0056b3;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,123,255,0.3);
}

.btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn-secondary {
  background: var(--secondary-color);
  color: white;
}

.btn-secondary:hover {
  background: #218838;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(40,167,69,0.3);
}

/* 联系表单 / Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin: 2rem 0;
}

.contact-form-section h2,
.contact-info-section h2,
.wechat-section h2 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.wechat-section {
  text-align: center;
}

.wechat-section p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.wechat-qr-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.wechat-qr {
  max-width: 300px;
  width: 100%;
  height: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 10px;
  background: var(--bg-glass);
  box-shadow: var(--shadow-card);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-family: inherit;
  background: #fff;
  box-shadow: var(--shadow-subtle);
  transition: border-color var(--transition-ui), box-shadow var(--transition-ui);
}

.form-group input:focus-visible,
.form-group select:focus-visible,
.form-group textarea:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* 面包屑 - 次要文字色 */
.breadcrumb {
  padding: 1rem 0;
  margin-bottom: 1rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: ">";
  margin: 0 0.5rem;
  color: var(--text-tertiary);
}

.breadcrumb a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-ui);
}

.breadcrumb a:hover {
  color: #0056b3;
  text-decoration: underline;
}

.breadcrumb li:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

.contact-item h3 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.contact-item p {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 地图区域 / Map Section */
.map-section {
  margin: 3rem 0;
}

.map-section h2 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-size: 1.25rem;
}

.map-container {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.map-note {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin: 0.5rem 0;
}

/* FAQ样式 / FAQ Styles */
.faq-section {
  margin: 2rem 0;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-color);
  transition: background-color var(--transition-ui);
}
.faq-item:hover {
  background: var(--bg-glass-hover);
}

.faq-question {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
  letter-spacing: -0.02em;
}

.faq-answer {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
}

.faq-answer a {
  color: var(--primary-color);
  text-decoration: none;
}

.faq-answer a:hover {
  text-decoration: underline;
}

.faq-contact {
  text-align: center;
  margin: 3rem 0;
  padding: 2rem;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-subtle);
}

/* 网站地图样式 / Sitemap Styles */
.sitemap-section {
  margin: 2rem 0;
}

.sitemap-section h2 {
  color: var(--text-primary);
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.sitemap-list {
  list-style: none;
  margin-left: 1rem;
  margin-bottom: 2rem;
}

.sitemap-list li {
  margin-bottom: 0.5rem;
}

.sitemap-list a {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-ui);
}

.sitemap-list a:hover {
  color: #0056b3;
  text-decoration: underline;
}

/* 404错误页面 / 404 Error Page */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 0;
}

.error-content {
  text-align: center;
}

.error-content h1 {
  font-size: 6rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.error-content h2 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.error-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.error-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 页脚 - 深色背景保持，文字层次 */
footer {
  background: var(--bg-dark);
  color: #f8fafc;
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.footer-section p {
  margin: 0.5rem 0;
  color: #e2e8f0;
  font-size: 0.875rem;
}

.footer-section a {
  color: #e2e8f0;
  text-decoration: none;
  display: block;
  margin: 0.5rem 0;
  font-size: 0.875rem;
  transition: color var(--transition-ui);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  color: #94a3b8;
  font-size: 0.75rem;
}

.footer-bottom a.beian-link {
  color: #e2e8f0;
  text-decoration: none;
  font-size: 0.875rem;
}

.footer-bottom a.beian-link:hover {
  text-decoration: underline;
}

/* 图片懒加载样式 / Lazy Loading Image Styles */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* 响应式设计 / Responsive Design */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    display: none;
    gap: 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .page-header h1 {
    font-size: 1.8rem;
  }

  .page-header p {
    font-size: 1rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .wechat-qr {
    max-width: 250px;
  }

  .breadcrumb {
    font-size: 0.9rem;
    padding: 0.5rem 0;
  }

  .content-section h2 {
    font-size: 1.5rem;
  }

  .error-content h1 {
    font-size: 4rem;
  }

  .error-content h2 {
    font-size: 1.5rem;
  }

  .error-actions {
    flex-direction: column;
    align-items: center;
  }

  .error-actions .btn {
    width: 100%;
    max-width: 300px;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .page-header {
    padding: 2rem 0;
  }

  .page-header h1 {
    font-size: 1.5rem;
  }

  .btn {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
  }
}

/* 首页 - Hero 主标题 1.875rem，留白 */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #f8fafc;
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 1.875rem;
  margin-bottom: 1rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.hero p {
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  opacity: 0.95;
}

.carousel {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
  margin: 2rem 0;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
}

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

.content-section {
  padding: 3rem 0;
}

.content-section h2 {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: var(--text-primary);
  text-align: center;
  letter-spacing: -0.025em;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

/* 服务卡片 - 玻璃拟态、1px 边框、200ms 过渡、hover 背景 */
.service-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  transition: background-color var(--transition-ui), transform var(--transition-ui), box-shadow var(--transition-ui);
}

.service-card:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.service-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.service-card p {
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.service-card a {
  display: inline-block;
  margin-top: 0.75rem;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: color var(--transition-ui);
}

.service-card a:hover {
  text-decoration: underline;
}

.advantages {
  background: var(--bg-light);
  padding: 3rem 0;
}

.advantages-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.advantage-item {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-color);
  box-shadow: var(--shadow-subtle);
  transition: background-color var(--transition-ui);
}

.advantage-item:hover {
  background: var(--bg-glass-hover);
}

.advantage-item h3 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.advantage-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.slogan-section {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #f8fafc;
  padding: 4rem 0;
  text-align: center;
}

.slogan-section h2 {
  font-size: 1.875rem;
  margin-bottom: 1rem;
  color: #f8fafc;
  letter-spacing: -0.025em;
}

.slogan-section p {
  font-size: 0.875rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.cta-button {
  display: inline-block;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-color);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  transition: transform var(--transition-ui), box-shadow var(--transition-ui), background-color var(--transition-ui);
  margin: 0.5rem;
  border: 1px solid rgba(255,255,255,0.5);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  background: #fff;
}

/* 首页响应式样式 / Homepage Responsive Styles */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .carousel {
    height: 300px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .slogan-section h2 {
    font-size: 1.8rem;
  }

  .slogan-section p {
    font-size: 1.1rem;
  }
}

/* 文章/博客容器窄版 / Article & Blog narrow container */
article.container {
  max-width: 900px;
}

/* 关于我们 / About Us */
.mission-vision {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.mission-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  box-shadow: var(--shadow-subtle);
  transition: background-color var(--transition-ui);
}
.mission-card:hover {
  background: var(--bg-glass-hover);
}

.mission-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.mission-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.qualifications {
  list-style: none;
  margin: 2rem 0;
}

.qualifications li {
  padding: 1rem 1.5rem;
  margin-bottom: 0.5rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-color);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: background-color var(--transition-ui);
}
.qualifications li:hover {
  background: var(--bg-glass-hover);
}

/* 博客文章 / Blog Article */
.article-header {
  margin: 2rem 0;
}

.article-header h1 {
  font-size: 1.875rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.article-meta {
  color: var(--text-tertiary);
  font-size: 0.75rem;
  margin-bottom: 2rem;
}

.article-content {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

/* 博客列表 / Blog List */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.blog-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  transition: background-color var(--transition-ui), transform var(--transition-ui), box-shadow var(--transition-ui);
}

.blog-card:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.blog-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.blog-card-content {
  padding: 1.5rem;
}

.blog-card-content h2 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.blog-card-content .date {
  color: var(--text-tertiary);
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}

.blog-card-content a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.blog-card-content a:hover {
  text-decoration: underline;
}

/* 案例列表与卡片 / Cases */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.case-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  transition: background-color var(--transition-ui), transform var(--transition-ui), box-shadow var(--transition-ui);
}

.case-card:hover {
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.case-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.case-card-content {
  padding: 1.5rem;
}

.case-card-content h2 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.case-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1rem 0;
}

.stat-item {
  text-align: center;
  padding: 0.5rem 1rem;
  background: var(--bg-glass);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  font-size: 0.875rem;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.case-card a {
  display: inline-block;
  margin-top: 1rem;
  background: var(--primary-color);
  color: white;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background-color var(--transition-ui), transform var(--transition-ui);
}

.case-card a:hover {
  background: #0056b3;
  transform: translateY(-1px);
}

/* 案例/客户反馈块 / Testimonial */
.testimonial {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-color);
  margin: 2rem 0;
  box-shadow: var(--shadow-subtle);
}

.testimonial p {
  font-style: italic;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 服务子页：流程、表格、特色卡片 / Service sub-pages */
.process-list {
  list-style: none;
  margin: 2rem 0;
}

.process-list li {
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--primary-color);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-ui);
}
.process-list li:hover {
  background: var(--bg-glass-hover);
}

.process-list li strong {
  color: var(--text-primary);
  font-size: 0.875rem;
}

.content-section table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--bg-glass);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  font-size: 0.875rem;
}

.content-section table th,
.content-section table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.content-section table th {
  background: var(--primary-color);
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
}

.content-section table tr:hover {
  background: var(--bg-glass-hover);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  box-shadow: var(--shadow-subtle);
  transition: background-color var(--transition-ui);
}
.feature-card:hover {
  background: var(--bg-glass-hover);
}

.feature-card h3 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* 服务页网格与卡片内容 / Services page */
.service-card-content {
  padding: 2rem;
}

.service-card-content h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.service-card-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.service-features {
  list-style: none;
  margin: 1.5rem 0;
}

.service-features li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.service-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.service-card-content a,
.case-card a {
  display: inline-block;
  margin-top: 1rem;
  background: var(--primary-color);
  color: white;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background-color var(--transition-ui), transform var(--transition-ui);
}

.service-card-content a:hover,
.case-card a:hover {
  background: #0056b3;
  transform: translateY(-1px);
}

/* 通用优势/类型网格 / Advantages & types grids */
.advantages-grid,
.service-types,
.maintenance-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

@media (max-width: 768px) {
  .mission-vision,
  .features-grid,
  .advantages-grid,
  .service-types,
  .maintenance-types {
    grid-template-columns: 1fr;
  }

  .article-header h1 {
    font-size: 1.8rem;
  }

  .content-section table {
    font-size: 0.9rem;
  }
}

/* 打印样式 / Print Styles */
@media print {
  header,
  footer,
  .nav-toggle,
  .btn {
    display: none;
  }

  main {
    padding: 0;
  }
}