.po01 {background:url(../images/01.png);}
.po02 {background:url(../images/02.png);}
.po03 {background:url(../images/03.png);}
.po04 {background:url(../images/04.png);}

.picture { background-size:cover !important; min-height:140px; box-shadow: inset 0 0 2px 2px rgba(128,128,128,1); border-radius:6px 6px 6px 6px; margin:5px; background-position:center; }


.central { text-align:center;}


.colum { width:40%;}


@media screen and (max-width: 600px) {
.picture { background-size:cover !important; min-height:110px; box-shadow: inset 0 0 2px 2px rgba(128,128,128,1); border-radius:6px 6px 6px 6px; margin:5px; background-position:center; }


.colum { width:30%;} }