.srs{display:block;width:100%;margin:20px auto;padding:20px;font-size:16px}
.srs-slider{position:relative;display:block;width:100%;height:25x;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}
/* .srs-slider::before,.srs-slider::after{content:'';display:table} */
/* .srs-slider::after{clear:both} */
.srs-track{position:absolute;left:40px;right:40px;top:15px;height:4px;background:#e9e9e9}
.srs-thumb{position:absolute;top:-12px;width:25px;height:25px;color:#fff;font-size:18px;background:#333;text-align:center;border-radius:50%;cursor:pointer;box-shadow: 4px 7px 7px 0px #b2b2b2;}
.srs-thumb span{position:absolute;top:10px;left:50%;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}
.srs-bubble{position:absolute;top:-25px;left:12.5px;}
.srs-bubble span{padding:5px 10px;display:inline-block;font-size:15px;color:#fff;background:#0c2e8a;border-radius:5px}
.srs-bubble:before{content:'';background:#0c2e8a;position:absolute;left:50%;bottom:-25px;margin-left:-5px;width:10px;height:10px;-webkit-transform:rotate(45deg);transform:rotate(45deg)}
.srs-minus{position:relative;float:left}
.srs-plus{position:relative;float:right}
.srs-minus,.srs-plus{top:5px;width:25px;height:25px;color:#333;font-size:18px;border:2px solid #e9e9e9;border-radius:50%;cursor:pointer}
.srs-minus span{position:absolute;top:45%;left:50%;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}
.srs-plus span{position:absolute;top:50%;left:50%;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}