<p id="demo">示例文字</p>
#demo{
font-size:13px;/*兼容ie8*/
font-size:2rem;/*ie8忽略此规则*/
}
/*仅火狐识别*/
@-moz-document url-prefix() {
#demo{
color:red;
}
}
/*Webkit内核浏览器chrome and safari-*/
@media screen and (-webkit-min-device-pixel-ratio:0) {
#demo{
color:green;
}
}
/*ie9*/
#demo{
color:orange9;
}