@headcolor1: #323233; //头部颜色
.drawer {
  z-index: 1000;
  width: 0;
  height: 100%;
 background: @headcolor1;
  transition: width 0.1s;
  position: absolute;
  top:60px;

  overflow: hidden;
}
.drawerShow {
  width: 300px;
}
.drawer-left{
    left:0;
}
.drawer-right{
    right: 0px;
}