.ymaps-2-1-79-image-with-content {
    background-size: 100px 100px !important;
    background-repeat: no-repeat !important;
    width: 100px !important;
    height: 100px !important;
    background-image: url(https://tilda.chiliweb.ru/projects/gvardeyskiy/marker_map.png)  !important;
}