.dropdown{
    position: relative;
  }
  .dropdown .dropdown-btn{
    padding: 6px 30px 6px 12px;
    border: 1px solid #a4a4a4;
    border-radius: 5px;
    position: relative;
  }
  .dropdown .dropdown-btn span{
    display: block;
    width:100%;
    height: 100%;
    font-size: 16px;
    font-family: Microsoft YaHei, 微软雅黑;
    
  }
  .dropdown .dropdown-btn .xiala_icons{
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-30%);
  }
  .dropdown .dropdown-content{
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    max-height: 300px;
    overflow-x: auto;
    box-shadow: 0 5px 20px 0 #e4e4e4;
    z-index: 11;
    background-color: #fff;
  }
  .dropdown-content .dropdown-item{
    padding-top:8px ;
    padding-bottom: 8px;
    cursor: pointer;
  }
  .dropdown-content .dropdown-item:hover{
    color: #da251d;
    background-color:rgba(218, 37, 30, .1) ;
  }
  .dropdown-content .dropdown-item.dropdown_active{
    background-color:rgba(218, 37, 30, .1) ;
    color: #da251d;
  }
  #dropdownContent{
    display: none;
  }