.wrapper .tl {
   background: url('../images/corners_gray/tl.gif') no-repeat top left;
}

.wrapper .tr {
   background: url('../images/corners_gray/tr.gif') no-repeat top right;
}

.wrapper .bl {
   background: url('../images/corners_gray/bl.gif') no-repeat bottom left;
}

.wrapper .br {
   background: url('../images/corners_gray/br.gif') no-repeat bottom right;
   padding:11mm 30px 50px 50px;
}