Board Thread:Support Requests - Getting Technical/@comment-25648422-20160124051332/@comment-4970747-20160124073854

Nanaki wrote: @import statements have to be at the top of the file, but due to how Wikia serves css it has to be at the top of MediaWiki:Common.css. Common.css and Wikia.css are stitched together into one file, thus @imports from Wikia.css land in the middle of the code. Move the import to Common.css and it'll start working.

As for quotation marks, they are optional and only become necessary when there are unescaped special characters in the url.

Some wikis are set up to import Wikia.css first I'm fairly certain.