.dropdown-menu li {
        position: relative;
}

.dropdown-menu .dropdown-submenu {
      display: none;
      position: absolute;
      left: 100%;
      top: -7px;
}

.dropdown-menu .dropdown-submenu-left {
   right: 100%;
   left: auto;
}

.dropdown-menu>li:hover>.dropdown-submenu {
  display: block;
}

@media (min-width: 1200px) {
  .container {
    width: 970px;
  }
}