hack

all IE:

Selector{property:value9;}

IE7:

*+html Selector{property:value;}

*:first-child+html Selector {property:value;}

Selector {*property:value;}

Selector {+property:value;}

IE7,IE7-：

*body Selector {+property:value;}

IE8:

@media screen {Selector{property:value;}}

IE8+:

 Selector {property: value;}

IE8/9/10:

 Selector {property: value9;}

IE10:

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
　　Selector {property: value;} /* for IE10+ 此写法可以适配到高对比度和默认模式，故可覆盖所有ie10的模式 */
}

IE9、10、火狐、谷歌：

:root Selector {property: value;}

Firefox火狐（支持所有Gecko内核的浏览器，包括火狐）：

@-moz-document url-prefix() { Selector { property: value; } }

谷歌：

@media screen and (-webkit-min-device-pixel-ratio: 0) { Selector { property: value; } }