.hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/b/b/csm_Marburg_96c1f75321.jpg); }@media screen and (min-width: 640px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/b/b/csm_Marburg_f3ea21f98a.jpg); } }@media screen and (min-width: 960px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/b/b/csm_Marburg_fe8d3815e6.jpg); } }