.bg-supporting-wrapper {
z-index: -100;
opacity: 1;
    border: 0px solid #f00;
    position: absolute;
    margin: 0 auto;
    width: 920px;
height: 562px;
//top: 0px;
//left: 50px
}

.sec-supporting {
z-index: 100;
    border: 0px solid #00f;
    position: relative;
//    margin: 0 auto;
    width: 920px;
height: 562px;
//top: 20px;
//left: 20px;
}