Adding :before and :after pseudo-elements in Webflow isn't directly supported through the design interface, but you can achieve this through custom code.
.custom-class.
```css
.custom-class:before {
content: " ";
// Add additional styles here, like background-color, width, height, etc.
}
.custom-class:after {
content: " ";
// Style as needed
}
```
.custom-class with your specific class name when applying styles.
In summary, while Webflow doesn't have built-in support for :before and :after pseudo-elements within its UI, you can use custom CSS code in Page or Project Settings to implement these effects. Just remember to uniquely target elements with classes and publish to see the changes.