How can I add :before and :after effects in Webflow?

In Webflow, you can create :before and :after effects using custom code. Here's a step-by-step guide on how you can achieve it:

1. Open your project in Webflow Designer and select the element you want to add the :before or :after effect to.

2. Go to the Style panel on the right-hand side and click on the "+" button next to the element's class name to add a new selector.

3. Inside the selector field, enter the following code to target the :before pseudo-element:
```
::before
```

4. Once you've entered the selector, you can add styles to customize the :before element. For example, you can use the "Content" property to add text or an image before the element:
```
content: "Your Text or URL";
```

5. You can also add other styles like color, font-size, padding, and position to further customize the :before element.

6. If you want to add styles to the :after pseudo-element, follow the same steps as above, but use the "::after" selector instead of "::before":
```
::after
```

7. Once you've customized the :before and/or :after elements, click outside the selector field to save your changes.

8. Preview your site in the Designer or publish it to see the :before and :after effects in action.

Remember that adding custom code like this requires the use of the Webflow CMS plan or higher. Additionally, make sure to test your :before and :after effects across different devices and browsers to ensure they display correctly.

Keep in mind that while Webflow provides a flexible design environment, using custom code may require a basic understanding of HTML and CSS.