/*圆环进度条*/
.circle {
	position:absolute;
	height:200px;
	width:200px;
	border-radius:50%;
	background:red;
}
.pie-right,.pie-left {
	position:absolute;
	top:0;
	left:0;
	height:200px;
	width:200px;
	border-radius:50%;
}
.right,.left {
	position:absolute;
	top:0;
	left:0;
	height:200px;
	width:200px;
	border-radius:50%;
	background:blue;
}
.pie-right,.right {
	clip:rect(0,auto,auto,100px);
}
.pie-left,.left {
	clip:rect(0,100px,auto,0);
}
.mask {
	position:absolute;
	top:25px;
	left:25px;
	height:150px;
	width:150px;
	background:#fff;
	border-radius:50%;
	text-align:center;
}