.topBar{
  position: fixed;
  left: 0;
  top: 0rpx;
  width: 100%;
  height: 25px;
  color: #FFFFFF;
  z-index: 999;
  box-sizing: border-box;
  background: #333947;
}
.bg_jb{
	background: linear-gradient(180deg, #27282F 0%, #585C6D 100%);
}
.topBar_title{
  font-size: 32rpx;
  line-height: 44rpx;
  position: absolute;
  width: 50%;
  left: 0;
  right: 0;
  margin:auto;
  text-align: center;
}
.back {
  width: 80rpx;
  height: 40rpx;
  margin-left: 10rpx;
  position: relative;
}
.back_image{
  width: 34rpx;
  height: 34rpx;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
}