@media screen and (max-width: 800px) { 
   #main-slider { display: none; } 
}
@media (max-width:767px){
	.navbar-collapse > ul{
		background:#FFF;
	}
	.navbar-collapse .dropdown-menu {
		padding:0
	}
}
@media (max-width:400px){
	.navbar-brand > img{
		max-width:200px
	}
}