How to use font awesome in css "before"?

[LiZheCN]

I have this code in my css snippet.

span.cm-hashtag.cm-hashtag-end.cm-meta.cm-tag-choice:before
{
  content: "\f28a";
}

I want to add a font awesome before tag “choice”.
If change the content to emoji it works fine.

But it wont work when change it to fa.
And I already download the font awesome css file and put it into the
css snippet directory and loaded.

CSS file link

Just a blank here.

So how can I fix this?

[CawlinTeffid]

The wizards in the Obsidian Discord’s #appearance channel can probably tell you.