/* hide pc menu */
#nav1{
	display:none;
	margin: auto;
}

/* show mobile menu */
#nav2{
	display:block;
	margin: auto;
}

/*thumbnail evolve for mobile mode */
.thumb img{
	width: 480px;
	max-width:100%;
}

.box_50percent{
	width:auto;
	clear:both;
	float:none;
	}