dropdown-submenu{position: relative;}
.dropdown-submenu .caret{-webkit-transform: rotate(-90deg); transform: rotate(-90deg);}
.dropdown-submenu > .dropdown-menu {top:0; left:100%; margin-top:-6px; margin-left:-1px;}
.dropdown-submenu.open > a:after{border-left-color:#fff;}
.dropdown-submenu.open > .dropdown-menu, .dropdown-submenu.open > .dropdown-menu {display: block;}
.dropdown-submenu .dropdown-menu{margin-bottom: 8px;}
.navbar-default .navbar-nav .open .dropdown-menu .dropdown-submenu ul{background-color: #f6f6f6;}
.navbar-inverse .navbar-nav .open .dropdown-menu .dropdown-submenu ul{background-color:#333;}
.navbar .navbar-nav .open .dropdown-submenu .dropdown-menu > li > a{padding-left: 30px;}
@media screen and (min-width:992px){
  .dropdown-submenu .dropdown-menu{margin-bottom: 2px;}
  .navbar .navbar-nav .open .dropdown-submenu .dropdown-menu > li > a{padding-left: 25px;}
  .navbar-default .navbar-nav .open .dropdown-menu .dropdown-submenu ul{background-color:#fff;}
  .navbar-inverse .navbar-nav .open .dropdown-menu .dropdown-submenu ul{background-color:#fff;}
}