.single_blk1{
    display:block!important;
    margin: 0 auto!important;
    width:260px;
    float:none;
}
.two_blk1{
    display:block!important;
    margin: 0 auto!important;
    width:260px;
    float:left;
}
.single_row{
    margin: 0 auto!important;
    float:none;
    max-width:300px;
}
.two_row{
    margin: 0 auto!important;
    float:none;
    max-width:600px;
}
.two_row_4{
    margin: 0 auto!important;
    float:none;
    max-width:600px;
}
.three_row{
    margin: 0 auto!important;
    float:none;
    max-width:900px;
}
@media screen and (max-width: 1200px) {
    .single_row{
        max-width:240px;
    }
    .two_row{
        max-width:480px;
    }
    .two_row_4{
        max-width:480px;
    }
    .three_row{
        max-width:720px;
    }
}
@media screen and (max-width: 960px) {
    .single_row{
        max-width:320px;
    }
    .two_row{
        max-width:640px;
    }
}
@media screen and (max-width: 660px) {
    .single_row{
        max-width:480px;
    }
    .two_row{
        max-width:480px;
    }
}