#about_wrapper{ height:auto; margin:0% 0 auto;  width:100%; position:relative; z-index:889;}

#service_wrapper{ background:url(../../img/front/service_bg.jpg) no-repeat 50% 0 fixed; background-size:cover !important; background-size:cover\9; height:auto;             margin:0 auto; width:100%; position:relative; z-index:890;}
        
#research_wrapper{ background:url(../../img/front/research_bg.jpg) 50% 0 fixed; height:auto; margin:0 auto; width:100%; position:relative; z-index:891;}

#contact_wrapper{ background:url(../../img/front/contact_bg.jpg) no-repeat 50% 0 fixed; background-size:cover !important; background-size:cover\9; height:auto;             margin:0 auto; width:100%; position:relative; z-index:892;}