@charset "UTF-8";
#wrap { width:640px; height:auto; margin:0 auto; position:relative; overflow:hidden; }
#wrap header { width:640px; height:100px; margin:0 auto; position:relative; background:#fff; z-index:200; }
#wrap section { height:auto; margin:0 auto; }
#wrap section.sub { width:640px;}
#wrap nav { height:68px;margin:0}
#wrap footer { width:100%; height:auto; background:#f9f9f9; font-size:18px; color:#6b6b6b; font-weight:300; margin:0 auto; }