@media (min-width: 992px) {
.navbar-header{width: 100%;}
.dropdown-menu,
.dropdown-submenu > .dropdown-menu {
    display: block;
     visibility: hidden; 
    opacity:0;
    -webkit-transform: translateY(30px);
    -moz-transform: translateY(30px);
    -ms-transform: translateY(30px);
    -o-transform: translateY(30px);
    transform: translateY(30px);
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    -ms-transition: all 0.1s ease-in-out;
    -o-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
  }
  .dropdown:hover > .dropdown-menu,
  .dropdown-submenu:hover > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    -webkit-transform: translateY(0);
    -moz-transform: translateY(0);
    -ms-transform: translateY(0);
    -o-transform: translateY(0);
    transform: translateY(0);
  }
}