* {
	margin:0;
	padding:0;
}
.nav {
	width:100%;
	height:60px;
	background:red;
	overflow:hidden;
}
.nav>ul {
	width:200px;
	height:20px;
	margin:20px auto;
	list-style:none;
}
.nav>ul>li {
	width:20px;
	height:20px;
	float:left;
	margin-right:10px;
	background:white;
	line-height:20px;
	cursor:pointer;
}
.now {
	background:blueviolet !important;
}
.box {
	position:relative;
	background:palevioletred;
	overflow:hidden;
}
.content {
	width:100%;
	position:absolute;
	top:0;
}
.content>li {
	font-size:40px;
	text-align:center;
}