body {
  margin: 0 auto;  
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.8;
  color: #222;
  background: #fff;
}

.site-header {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #eee;
}

.site-title {
  font-weight: 700;
  color: #111;
  text-decoration: none;
}

.site-nav a {
  margin-left: 16px;
  color: #555;
  text-decoration: none;
}

.site-nav a:hover {
  color: #000;
}

.container {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 20px;
}

a {
  color: #0969da;
}

a:hover {
  text-decoration: underline;
}

.post-meta {
  color: #777;
  font-size: 14px;
}

.post-content img {
  max-width: 100%;
  height: auto;
}

.post-content pre {
  overflow-x: auto;
  padding: 16px;
  background: #f6f8fa;
  border-radius: 6px;
}

.post-content code {
  font-family: Consolas, Monaco, "Courier New", monospace;
}

.site-footer {
  max-width: 860px;
  margin: 80px auto 0;
  padding: 24px 20px;
  border-top: 1px solid #eee;
  color: #777;
  font-size: 14px;
}