#cd5_321 { overflow:hidden; z-index:0;width:100%;position:relative;clear: left;box-sizing: border-box;background-color: #fff;color: #222;display: flex;flex-wrap: wrap;align-items: stretch;justify-content:center; padding: 20px 10px;}
#cd5_321 * { box-sizing: border-box; }
#cd5_321 .m321_box  { flex: 1; max-width: 300px; }
#cd5_321 .m321_img { display: block; width: 100%; max-width:190px; margin: auto; }
@media only screen and (max-width:599px) {
       #cd5_321 .m321_box  { width :50%; flex: none; }
}