*{
	margin: 0;
	padding: 0;
	user-select: none;
	-webkit-user-select: none;
	list-style: none;
}
#box1{
	width: 800px;
	margin: 0 auto;
}
.range{
	position: relative;	
	height: .1rem;
}
.chunk-one,.chunk-two{
	position: absolute;
	left: 0;
	top: -0.15rem;
	width: .5rem;
	height: .5rem;
	border-radius: 50%;
	background-color: #fff;
	z-index: 10;
	cursor: pointer;
	transition: all .05s linear; 
	box-sizing: border-box;	
	margin-left: -.23rem;
	background-color: #727272;
	box-shadow: 0 2px 5px rgba(0,0,0,.1)
}
.range .chunk-two{
	left: 100%;
	background-color: #ffffff;
        box-shadow: 0 0 6px #999;
}
.chunk-one strong,.chunk-two strong{
	display: inline-block;
	margin-top: 18px;
	text-align: center;
	font-weight: normal;
	display: none;
}
.strip-one,.strip-two{
	position: absolute;
	left: 0;
	top: 25px;
	height: 2px;
	width: 100%;
	background-color: #999;
	display: none;
}
.strip-two{
	width: 100%;
	background-color: #409eff;
}