.hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/8/3/csm_Challenge_de5d908c97.jpg); }@media screen and (min-width: 640px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/8/3/csm_Challenge_5f0665f02a.jpg); } }@media screen and (min-width: 960px) { .hte-image-grid .b0 { background-image: url(/fileadmin/_processed_/8/3/csm_Challenge_3e95502d27.jpg); } }