.yoko3_1{
    float: left;
    width:32.5%;
}
.yoko3_2{
    float: left;
    width:32.5%;
    margin:0 1.25% 0 1.25% ;
}
.yoko3_3{
    float: left;
    width:32.5%;
}
.yoko2_1{
    float: left;
    width: 49.2%;
    margin-right: 1.6%;
    margin-top: 12px;
}
.yoko2_2{
    float: left;
    width: 49.2%;
    margin-top: 12px;
}
.yoko2a_1{
    float: left;
    width: 49.2%;
    margin-right: 1.6%;
    margin-top: 50px;
}
.yoko2a_2{
    float: left;
    width: 49.2%;
    margin-top: 50px;
}

@media screen and (max-width: 1000px){
    .yoko3_1{
        width:100%;
        clear:both;
        margin: 0;
        padding-top: 10px;
    }
    .yoko3_2{
        width:100%;
        clear:both;
        margin: 0;
        padding-top: 10px;
    }
    .yoko3_3{
        width:100%;
        clear:both;
        margin: 0;
        padding-top: 10px;
    }
    .yoko2a_1{
        float: left;
        width: 100%;
        margin-top: 40px;
    }
    .yoko2a_2{
        float: left;
        width: 100%;
        margin-top: 20px;
    }
}