Some text on that webpage:
>going to equestria sounds fun until you realize you have to explain every and anything about humanity to ponies, almost like how a kid will ask you how the most complicated shit works, chances are ponies won't shut up and ask you about redudent things endlessy.
So CSS works there and not in some other links because it asks for the stylesheet from root. And if the gateway is at http.../ipfs/... then root doesn't have JS+CSS, but if it is a link like this then it does have it: http...cid.ipfs.host/...