@import in @media not working in Firefox 3.0.3

问题

This is what I have, which works in IE7, but not in Firefox:

@media screen { @import 'screen.css'; }

It works outside of the @media block in Firefox:

@import 'screen.css';

UPDATE:

This works:

@media screen { 

    .yui-d3f
    {
        border: 1px solid #999;
        height: 250px;
    }

}

What am I missing?

回答1:

Firefox is following the CSS2 specification, while IE is playing fast and loose, as it were.

The exact reason is that @import directives must be the first directives after the optional @charset directive. They cannot appear inside of any block. If you want an @import to apply to only one media type, specify that after the imported URI.

Here is the pertinent section of the CSS2 specification: 6.3 The @import rule.

回答2:

Ok, so Firefox doesn't like the method I chose, favouring:

@import 'stylesheet.css' media_type;

But IE7 doesn't understand this method, but this could be good:

@import 'firefox-screen.css' screen;
@media screen { @import 'IE7-screen.css'; }

来源：https://stackoverflow.com/questions/223833/import-in-media-not-working-in-firefox-3-0-3