Board Thread:Support Requests - Designing Your Wiki/@comment-3147293-20161109073712/@comment-30683785-20161111145143

Speedit wrote: You could add this to your JS, to import the mainpage CSS only on the page in question.

EDIT: Minified CSS URL. Should work too, just replace "wiki name" with the name of your wiki as it shows up when you navigate to the main page (in quotation marks).