UNBREAK DIVI CSS COLUMN

 Below is the code

@media only screen and (max-width: 980px) {   .two-columns .et_pb_column { width: 50%!important; }   .three-columns .et_pb_column { width: 33.33%!important; }   .four-columns .et_pb_column { width: 25%!important; } }

Take the first class example three-columns, copy without dot. And paste in divi column id/class