#pc_main,#tab_main {margin:2em auto 2em; width:100%; height:auto; position: relative; }
#pc_main{ max-width:900px; margin:auto; text-align:center;}

#tab_main {display:none; visibility:hidden; max-width:840px; }
/***********************/
/* Media Queries */
@media screen and (max-width: 1024px) {
	#pc_main{display:none; visibility:hidden;}
	#tab_main {display:block; visibility:visible; width:98%;}
}
@media screen and (max-width: 599px) {
}