I've read through all the other posts on this topic but non seemed to help.
When I have:
.tb-megamenu-submenu .dropdown-menu .mega-dropdown-menu .nav-child{
left:50% !important;
}
It doesn't add the style to the element.
But If I use it inline it works:
<div data-class="increase-background-about" data-width="0" class="tb-megamenu-submenu increase-background-about dropdown-menu mega-dropdown-menu nav-child" style="left:50px">
I'm completely stumped and the other questions haven't helped.