@screen-sm-min: 768px;
@screen-md-min: 992px;
@screen-lg-min: 1200px;
 
@media ( max-width:@screen-sm-min ){ 
	.header, .footer  ,.footer_nav{  width:100%;} 
	
	.content2 {width:1050px;}
	.subfooter div.span7{float: right;margin-right: 10px;}
} 

@media ( min-width:@screen-sm-min ) and ( max-width:@screen-md-min ){ 
	 .header, .footer  ,.footer_nav{  width:100%;} 
	
	.content2 {width:1050px;}
	.subfooter div.span7{float: right;margin-right: 10px;}
} 

@media ( min-width:@screen-md-min ) and ( max-width:@screen-lg-min ){ 
	 .header, .footer  ,.footer_nav{  width:100%;} 
	
	.content2 {width:1050px;}
	.subfooter div.span7{float: right;margin-right: 10px;}
} 

@media ( min-width:@screen-lg-min ){
	.header, .footer  ,.footer_nav{  width:100%;} 
	
	.content2 {width:1050px;}
	.subfooter div.span7{float: right;margin-right: 10px;}
}