判断是手机银幕还是电脑屏幕，然后加载一个css文件。
判断是手机屏幕还是电脑屏幕，然后加载一个css文件。。
新手请教问题，如题，有关于这方面的文章之类的 发一下也ok 谢谢！
------解决思路----------------------
我判断了一个屏幕宽度，>1024的加载a.css
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