.canvaswrapper{
    width: 100%;
    height: 609px;
    background: #fff;
    margin-bottom: -5px;
    margin-top: -1px;
    overflow: hidden;
}

@media (max-width:1086px) {/* 2 * 352 + 352 + 2 * 15 */
    .canvaswrapper{
        height:722px;
    }
}

@media (max-width:734px){ /* 352 + 352 + 2 * 15 */
    .canvaswrapper{
        height:400px;
    }
}