.page-header .navbar-collapse {
  margin-right: -0.5rem;
}
.dropdown-menu
{
  left:auto;
  right:0;
}

.page-header{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,1);
  height: 81px;
  transition: all 0.3s ease;
}