The @import CSS Rule

An @import rule specifies the URL of an external style sheet to be imported. It can also include a media query expression consisting of a media type, one or more parenthesized media feature expressions, or both, separated by the conjunction and:

@import url(style-sheet-url) media-type and (media-feature:value);

The media query expressions that can be used in @import rules are the same as the ones used in @media rules.