.hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/e/5/csm_Olympiade_84009183ea.jpg); }@media screen and (min-width: 640px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/e/5/csm_Olympiade_c98d33a02b.jpg); } }@media screen and (min-width: 960px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/e/5/csm_Olympiade_a018a00fb3.jpg); } }