.display-none {
  display: none;
}
.display-block {
  display: block;
}
.huadong{position: relative;}
.huadong #canva{background: indianred;}
.huadong #block{position: absolute;left: 0px;top: 0;}
.huadong .refreshIcon{position: absolute;left: 280px;top: 5px;width: 21px;height: 20px;cursor: pointer;background: url(../image/refresh.png);display: block;}
.huadong .verSliderBlock{height: 40px;width: 40px;background-color: #fff;background:url('../image/right_arrow.png');background-size:100%;box-shadow:  0 0 3px rgba(0, 0, 0, .3);cursor: pointer;position: absolute;text-align: center;line-height: 40px;color: #45494c;font-size: 25px;font-weight: 400;}
.huadong .bar{position: relative;text-align: center;width: 310px;height: 40px;line-height: 40px;margin-top: 15px;background: #f7f9fa;color: #45494c;border: 1px solid #e4e7eb;display: block;}
.huadong #bar-mask{position: absolute;left: 0;top: 0;height: 40px;border: 0 solid #1991fa;background: #d1e9fe;}