.collapse-collapse-btn{
     background: #fafafa;
     font-size: 23px
}

.xt-collapse-btn{
    color: #696969;
    font-size: 23px;
/*    display: flex;*/
}

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {{
    .xt-collapse-btn{
        display: none;
    }
}

@media (min-width: 768px) {
  #my-div .collapse {
    display: block;
  }
}