.XHeader:before{
    background-image: URL('ressource?mid=1&name=Logo_Landkreis_Eichstaett.png');
    background-size: 230px;
    display: inline-block;
    width: 100%; 
    height: 100px;
    content:" ";
    background-repeat: no-repeat;
    background-position-x: left;
    mix-blend-mode: multiply;
    margin-top: 20px;
    margin-right: -10px;
    margin-bottom: 0px;
}