.number{
	position: absolute;
	bottom:8%;
	left: 50%;
	padding-bottom: 5px;
	border-bottom: 1px solid rgba(255,255,255,0.2);
	display: table;
	padding: 0 20px;
	width: auto;
	text-align: center;
	transform: translateX(-50%);
	-webkit-transform: translateX(-50%);
}
.number span{
	font-family: "Myriad Pro","Microsoft YaHei";
	font-size: 14px;
	color: #fff;
	margin-right:100px;
	display: inline-block;
	cursor: pointer;
	position: relative;
	transition: all 500ms ease;
	-webkit-transition:all 500ms ease;
}
.number span:last-child{
	margin-right: 0;
}
.number span:after{
	content: "";
	display: inline-block;
	width: 0;
	height: 2px;
	background: #fff;
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
	-webkit-transform: translateX(-50%);
	bottom:-20px;
	opacity: 0;
	visibility: hidden;
	transition: all 500ms ease;
	-webkit-transition:all 500ms ease;
}
.number span.active:after{
	width: 100%;
	opacity: 1;
	visibility: visible;
}