@media (max-width: 979px){
{
.nav-collapse .dropdown-menu {
    position: relative;
    top: auto;
    left: auto;
    display: none;
    float: none;
    max-width: none;
    padding: 0;
    margin: 0 15px;
    background-color: transparent;
    border: none;
    -webkit-border-radius: 0;
    -moz-border-radius: 0;
    border-radius: 0;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow: none;
}
}