body {
  font-family: "Microsoft YaHei", sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
}

nav {
  position: sticky;
  top: 0;
  background: #2c3e50;
  color: #fff;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav .logo {
  font-weight: bold;
  font-size: 18px;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
  transition: 0.2s;
}
nav ul li a:hover {
  color: #f39c12;
}

.container {
  max-width: 800px;
  margin: 30px auto;
  padding: 0 15px;
}

h2 {
  margin-top: 40px;
  color: #2c3e50;
}

/* 代码块背景 */
pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 15px;
  border-radius: 6px;
  overflow-x: auto;
}
code {
  font-family: Consolas, Monaco, monospace;
  white-space: pre-wrap; 
}

.keyword { color: #ff79c6; font-weight: bold; } 
.function { color: #50fa7b; }         
.builtin { color: #8be9fd; }         
.string  { color: #f1fa8c; }