* {
	margin:0;
	padding:0;
}
li,a {
	text-decoration:none;
	list-style:none;
	color:#484848
}
.nav {
	width:1000px;
	height:50px;
	border:1px solid #ccc;
	margin:0 auto;
	line-height:50px;
	margin-top:50px;
}
/*-----------------------导航1111111111-----------------------------*/

.nav1 a {
	width:70px;
	height:100%;
	float:left;
	margin:0 15px;
	position:relative;
	text-align:center;
}
.nav1 a span {
	margin:auto;
	display:inline-block;
	position:absolute;
	bottom:5px;
	left:0;
	right:0;
	width:0px;
	height:2px;
	background:#ff0000;
	transition:.5s;
	border-radius:50px;
}
.nav1 a:hover span {
	width:100%;
	left:0;
}
/*-----------------------导航2222222-----------------------------*/





.nav2 a {
	width:70px;
	height:100%;
	float:left;
	margin:0 15px;
	position:relative;
	text-align:center;
}
.nav2 a span {
	margin:auto;
	display:inline-block;
	position:absolute;
	bottom:5px;
	left:0;
	width:0px;
	height:2px;
	background:#ff0000;
	transition:.5s;
	border-radius:50px;
}
.nav2 a:hover span {
	width:100%;
}