Boost up the z-index
on line 2051 to 999
–
.genesis-nav-menu .sub-menu {
box-shadow:0 0 4px rgba(0, 0, 0, 0.1);
-moz-box-shadow:0 0 4px rgba(0, 0, 0, 0.1);
-webkit-box-shadow:0 0 4px rgba(0, 0, 0, 0.1);
left: -9999px;
margin: 0;
opacity: 0;
padding: 0;
position: absolute;
-webkit-transition: opacity .4s ease-in-out;
-moz-transition: opacity .4s ease-in-out;
-ms-transition: opacity .4s ease-in-out;
-o-transition: opacity .4s ease-in-out;
transition: opacity .4s ease-in-out;
width: 202px;
z-index: 999;
}