Not support @import with media query

[i18nsite]

https://philarcher.org/diary/2011/importrules/

[ThisIsManta]

The error was threw by Stylus parser as seen in the stack trace above and the same error can be reproducible in the official website below.

Stylus Supremacy (as a formatter) relies on Stylus parser to produce an AST in order to produce a formatted string. I'm afraid we have to wait for Stylus to officially support this beforehand.