/*
* @Author: Administrator
* @Date:   2017-11-25 13:53:19
* @Last Modified by:   Administrator
* @Last Modified time: 2017-11-25 17:27:17
*/


*{
	margin: 0;
	padding: 0;
	list-style: none;
	box-sizing: border-box;
}
nav{
	width: 500px;
	height: 40px;
	background: #000;
}
.box{
	width: 500px;
	height: 60px;
	background: blue;
	color: red;
}
#root{
	width: 600px;
	border: 10px solid red;
}
p{
	margin: 30px;
}