.side-toolbar {
    position: fixed;
    top: 20vh;
    right: .04rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 1.2rem;
    padding-bottom: .12rem;
    background: #fff;
    box-shadow: 0rem .02rem .08rem 0rem rgba(0, 0, 0, 0.15);
    border-radius: .04rem;
  }
  
  .side-toolbar .technical {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 1.2rem;
    margin-top: .11rem;
    font-size: .14rem;
    line-height: .19rem;
    color: #666;
  }
  
  .side-toolbar .technical .technical-item .technical-item-label {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    width: .8rem;
    height: .98rem;
    box-sizing: border-box;
    padding: .11rem .12rem .17rem .12rem;
  }
  
  .technical-item {
    position: relative;
    width: 100%;
    height: .98rem;
    padding: 0 .2rem;
    box-sizing: border-box;
  }
  
  
  .side-toolbar .technical .technical-item:hover {
    cursor: pointer;
    color: #0057D7;
   
  }
  .side-toolbar .technical .technical-item:hover .qrcode-img {
    display: block;
  }
  
  
  .qrcode-box:hover .qrcode-img {
    display: block;
  }
  
  .qrcode-img {
    display: none;
    position: absolute;
    left: -1.6rem;
    top: -0.18rem;
    width: 1.42rem;
    height: 1.42rem;
    padding: .09rem;
    border-radius: .08rem;
    border: 1px solid #DEDEDE;
    background-color: #FFFFFF;
  }
  .qrcode-img::after {
    content: '';
    display: inline-block;
    width: 0.1rem;
    height: 0.1rem;
    border-radius: 0.02rem;
    position: absolute;
    top: 50%;
    right: -.12rem;
    border-top:1px solid #DEDEDE ;
    border-right: 1px solid #DEDEDE;
    transform: translateX(-50%) translateY(-50%) rotate(45deg);
    
    background-color: #fff;
  }
  
  .qrcode-img img {
    width: 100%;
    height: 100%;
  }
  
  .side-toolbar .technical .qrcode {
    height: 1.07rem;
    padding: .11rem .02rem .17rem .02rem;
  }
  
  .side-toolbar .back-top {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    height: .45rem;
    margin-top: .11rem;
    font-size: .14rem;
    line-height: .19rem;
    color: #999;
    cursor: pointer;
  }
  
  .side-toolbar .technical .iconfont-zj {
    margin-top: .11rem;
    font-size: .44rem;
  }
  
  .back-top .iconfont-zj {
    font-size: .2rem;
  }