.tl_mou { background: url("../images/round_colors/mou_01.gif") no-repeat left top; }
.tr_mou { background: url("../images/round_colors/mou_02.gif") no-repeat right top; }
.bl_mou { background: url("../images/round_colors/mou_03.gif") no-repeat left bottom; }
.br_mou { background: url("../images/round_colors/mou_04.gif") no-repeat right bottom; }

.sub_mou, .full_mou { background-color: #591e55; }