针对谷歌、火狐浏览器写私有属性

火狐浏览器：@-moz-document url-prefix() { .selector { property: value; } }针对火狐写样式 hack
例子：@-moz-document url-prefix(){ .demo{color:lime;}}

Webkit枘核浏览器(chrome and safari)
@media screen and (-webkit-min-device-pixel-ratio:0) { Selector { property: value; } }
例子: @media screen and (-webkit-min-device-pixel-ratio:0) { .demo { color: #f36; } }