*, *:before, *:after {
    box-sizing: border-box;
}
.col_2{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
.col_2 > *{
    width: calc( 50% - 6px ) ;
    margin-right: 12px;
    margin-bottom: 12px;
}
.col_2 > *:nth-child(2n){
    margin-right: auto;
}
.col_2 > * > *{
    background: #fffff;
    height: 40px;
    position: relative;
    overflow: hidden
}
@media screen and (max-width: 960px) {
    .col_2 > *{
        width: 100%;
        margin-right: auto;
    }
}

*, *:before, *:after {
    box-sizing: border-box;
}
.col_3{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
.col_3 > *{
    width: calc( 33.33333% - 8px ) ;
    margin-right: 12px;
    margin-bottom: 12px;
}
.col_3 > *:nth-child(3n){
    margin-right: auto;
}
.col_3 > * > *{
    background: #ff0000;
    height: 120px;
    position: relative;
    overflow: hidden
}
@media screen and (max-width: 960px) {
    .col_3 > *{
        width: calc( 50% - 6px ) ;
    }
    .col_3 > *:nth-child(3n){
        margin-right: 12px;
    }
    .col_3 > *:nth-child(2n){
        margin-right: auto;
    }
}
@media screen and (max-width: 580px) {
    .col_3 > *{
        width: 100%;
        margin-right: auto;
    }
    .col_3 > *:nth-child(3n){
        margin-right: auto;
    }
}


*, *:before, *:after {
    box-sizing: border-box;
}
.col_4{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
.col_4 < *{
    width: calc( 25% - 9px );
    margin-right: 12px;
    margin-bottom: 12px;
}
.col_4 < *:nth-child(4n){
    margin-right: auto;
}
@media screen and (max-width: 960px) {
    .col_4 < *{
        width: calc( 33.33333% - 8px ) ;
    }
    .col_4 < *:nth-child(4n){
        margin-right: 12px;
    }
    .col_4 < *:nth-child(3n){
        margin-right: auto;
    }
}
@media screen and (max-width: 580px) {
    .col_4 < *{
        width: calc( 50% - 6px ) ;
    }
    .col_4 < *:nth-child(3n){
        margin-right: 12px;
    }
    .col_4 < *:nth-child(2n){
        margin-right: auto;
    }
}

*, *:before, *:after {
    box-sizing: border-box;
}

.col_5{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
.col_5 > *{
    width: calc( 20% - 20px );
    margin-right: 25px;
    margin-bottom: 25px;
}
.col_5 > *:nth-child(5n){
    margin-right: auto;
}
@media screen and (max-width: 960px) {
    .col_5 > *{
        width: calc( 25% - 9px );
        margin-right: 12px;
        margin-bottom: 12px;
    }
    .col_5 > *:nth-child(5n){
        margin-right: 12px;
    }
    .col_5 > *:nth-child(4n){
        margin-right: auto;
    }
}
@media screen and (max-width: 580px) {
    .col_5 > *{
        width: calc( 33.33333% - 8px ) ;
    }
    .col_5 > *:nth-child(5n){
        margin-right: 12px;
    }
    .col_5 > *:nth-child(4n){
        margin-right: 12px;
    }
    .col_5 > *:nth-child(3n){
        margin-right: auto;
    }
}

.border1{
	border: 3px blue solid;
	 text-align:center;
  height:50px;
  line-height:50px;
}