.outer_border {
    max-width:950px; height:700px; position: relative; background-color: darkslategray; padding:15px;  border: 10px solid rgba(133, 132, 132, 0.918)
}
.inner_border{
    max-width:900px; height:650px; background-color: lightcyan; padding:5px;  border: 5px solid #787878;
}
.bg_logo{
    position: absolute; left: 30%; top:35%; opacity: 0.2;
}
.content_div{
    width: 100%; height: 100%; position: absolute;  top:0px; text-align: center;
}
.excl{
    font-size: 3.5vw; color: mediumvioletred;
}
.excl img{
    width: 14vw;
    height: 9vw;
}
.iso{
    font-size:1.5vw; text-decoration: underline; text-align: center;
}
.cer{
    font-size:3vw; font-weight:bold; font-style: italic; text-decoration: underline; text-transform: uppercase; color: brown;
}
.para{
    font-size:1.3vw;
}
#cer_div_desk{margin-left:auto; margin-right:auto;}


#content-desktop {display: block;}
#content-mobile {display: none;}

@media screen and (max-width: 768px) {

#content-desktop {display: none;}
#content-mobile {display: block;}

}