#footerMenu > li{
    position: relative;
}
#footerMenu .sub-menu li{
    margin-bottom: 10px;
    padding-left: 30px;
}
#footerMenu .sub-menu{
    z-index: 100;
    
    min-width: 300px;
    left: 0;
    top: 30px;
    background: #000000aa;
    position: absolute;
}