.img_style {
    float: left;
    margin-right: 10px;
    margin-bottom: 10px;
    width: 320px;
}

.img_style2 {
    float: left;
    margin-bottom: 20px;
    width: 320px;
}

.img_style3 {
    float: left;
    margin-bottom: 10px;
    width: 320px;
}