#page-header-main { background-image: url(/fileadmin/_processed_/0/c/csm_Veranstaltungen-1920px_2aa062b000.jpg); }@media screen and (min-width: 640px) { #page-header-main { background-image: url(/fileadmin/_processed_/0/c/csm_Veranstaltungen-1920px_f255ba7c50.jpg); } }