SOURCE

console 命令行工具 X clear

                    
>
console
<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;
}