.str-column{display:flex;justify-content:space-between}
.str-cell{width:30.1986%}
.str-cell:not(:first-child){position:relative}
.str-cell:not(:first-child):before{position:absolute;content:"";width:0;height:0;border-left:19px solid #111;border-top:20px solid transparent;border-bottom:20px solid transparent;left:-20px;top:calc(50% - 40px)}
@media only screen and (max-width:980px){
.str-column{display:block}
.str-cell{width:100%}
.str-cell:not(:first-child):before{width:0;height:0;border-left:20px solid transparent;border-right:20px solid transparent;border-top:19px solid #111;left:calc(50% - 20px);top:10px}
.str-cell+.str-cell{padding-top:40px}
}