font-color: #64728c;
hadle-round-bacground: #fff;
font-color : #64728c
background-bar: f1f2f5;
font-size:14px;
font-weight: 800;
height: 30px;
border-radius: 100%;
width: 100%;
font-color : #64728c
background-bar: f1f2f5;
font-size:14px;
font-weight: 800;
height: 30px;
border-radius: 100%;
width: 100%;
fill-bar-color: primery color defult;
support up to 5 or 10 steps
font-color : #64728c
step-line-size color : #929baa
fill-bar-color: primery color defult;
handler or the input will not display