## link

* arco-pro/src/components/Panel/style/index.module.less

## less

```less
.panel {
  background-color: var(--color-bg-2);
  border-radius: 4px;
}
```



## css

```css
.panel {
  background-color: var(--color-bg-2);
  border-radius: 4px;
}
```

## bench-compare

* less.js 4ms
* rust-less 0.057ms