.row {
position: relative;
}
.row:after, .col:after, .clr:after, .group:after { 
content: ""; 
display: block; 
height: 0; 
clear: both; 
visibility: hidden; 
}
.row, div.clear { 
padding-bottom: 24px; 
} 
.col {
position: relative;
display: block;
float: left;
width: 100%; 
}
@media (min-width: 690px) {
.col {
margin-right: 2%; 
} 
}
.col.col_last { 
margin-right: 0; 
} 
.col:last-child { 
margin-right: 0; 
} 
@media (min-width: 690px) {
.span_3 { width: 23.5%; }
.span_9 { width: 74.5%; }
}