css hack 2

1 .color {color: #777;} /* for all browsers */
2 * html .color {color: #C39;} /* for IE6 */
3 *+html .color {color: #66F;} /* for IE7 */
4 .color {color: #0FC\0/;} /* for IE8, going last */
5 _:-ms-fullscreen, :root .color {
6     color: #ccc;  
7 }        /* for IE11 */
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原文地址：https://www.cnblogs.com/jasonoiu/p/Css_Hack_Two.html