* {
	margin:0;
	padding:0
}
.waiyuan {
	width:50px;
	height:50px;
	border-radius:50%;
	background:#dbdbdb;
	position:relative;
	margin:100px auto;
	text-align:center;
	line-height:50px;
}
.zhongyuan {
	width:25px;
	height:50px;
	top:0;
	position:absolute;
	z-index:3;
	right:0;
	overflow:hidden;
}
.neiyuan {
	width:46px;
	height:46px;
	border:2px solid transparent;
	border-radius:50%;
	position:absolute;
	top:0;
	border-top:2px solid green;
	border-right:2px solid green;
	right:0;
	transform:rotate(-135deg);
}
.lefts {
	left:0;
	overflow:hidden;
}
.neiyuan-leftss {
	width:46px;
	height:46px;
	border:2px solid transparent;
	border-radius:50%;
	position:absolute;
	top:0;
	border-top:2px solid green;
	border-right:2px solid green;
	left:0;
	transform:rotate(45deg);
}