Styling groups individually

[HaloElite]

Is there a way to style groups inside the select-dropdown?

<li class="vue-dropdown-item group" role="option" id="vs28-option-0" aria-selected="false" aria-disabled="false"><div>Anlage</div></li>
<li class="vue-dropdown-item" role="option" id="vs28-option-1" aria-selected="false"><span>Andere Anlagen</span></li>

Looking at the classes I don't see a way besides accessing the classList with JavaScript and filter the IDs as I need them to be styled, cause there's no class names like group-1, group-2 and so onon, which would make this quite easy.