.column{float:left;width:50%;height:auto}#cta{margin:auto;width:70%;margin-top:3vw}.cta_slider{background-color:#f1efed}.cta_slider:after{content:"";display:table;clear:both}@media screen and (max-width:900px){.column{width:100%}#zetas{margin-top:10vw;margin-bottom:10vw}}