## zh-CN

当内容较长时，使用固定侧边栏可以提供更好的体验。

## en-US

When dealing with long content, a fixed sider can provide a better user experience.

```css
#components-layout-demo-fixed-sider .logo {
  height: 32px;
  margin: 16px;
  background: rgba(255, 255, 255, 0.2);
}
#components-layout-demo-fixed-sider .site-layout .site-layout-background {
  background: #fff;
}
```

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