Board Thread:Support Requests - Designing Your Wiki/@comment-1807002-20190801032029/@comment-9605025-20190802190920

A few things:
 * 1) IDs should be used only once on a page. You use this template multiple times on the example page so you are breaking this guideline. I suggest you switch to using a class instead.
 * 2) The link is a child of a span tag inserted as the first child of the element you have specified with the class "mw-collapsible". You have given this class to the div tag surrounding your p tag. As such, the a tag you want to target is not a child of the p tag you assigned the ID to.