.a_dbleft {float: left; width: 250px;}
.a_dbright {float: left; width: 660px;}

/*Mobile Portrait:*/
@media only screen and (max-width : 540px) {
/* Styles */
.a_dbleft,.a_dbright {float: none; width: 100%;}
.a_dbleft p {text-align: center;}
}

@media only screen and (min-width : 541px) and (max-width : 1007px) {
/* Styles */
.a_dbleft,.a_dbright {float: none; width: 100%;}
.a_dbleft p {text-align: center; width: 100%;}
}