body { margin:0; padding:0; font-family:Verdana, Arial, sans-serif; font-size:11px; background:#F2F2F2; color:#333; }
#main_unity { width:1100px; margin:0 auto; padding:10px;}
#main_index { background:url(../pic_style/bg_index0.jpg) repeat-x; height:420px; width:100%; }


@media (min-width: 768px) and (max-width: 979px) {
	
#nav { display:none;}
#main_unity { width:760px; margin:0 auto; padding:10px 0;}
	
	}
	
	
	
@media (min-width: 480px) and (max-width: 767px) {
#nav { display:none;}
#main_unity { width:100%; margin:0 auto; padding:10px 0;}	
	
	}
	
	
@media  (max-width: 479px) {
#nav { display:none;}
#main_unity { width:100%; margin:0 auto; padding:10px 0;}	
	
	}