## zh-CN

一般用于固定顶部导航，方便页面切换。

## en-US

Fixed Header is generally used to fix the top navigation to facilitate page switching.

```css
#components-layout-demo-fixed .logo {
  float: left;
  width: 120px;
  height: 31px;
  margin: 16px 24px 16px 0;
  background: rgba(255, 255, 255, 0.2);
}
#components-layout-demo-fixed .site-layout .site-layout-background {
  background: #fff;
}
```

<style>
[data-theme="dark"] .site-layout .site-layout-background {
  background: #141414;
}
</style>