.sub .content { background-image:none; }
.sub .content article { width:855px; margin:0 40px 0 0; }
.nav_sub { display:none; }

@media only screen and (max-width: 1225px) {
    .sub .content article { width:600px; }
}
@media only screen and (max-width: 959px) {
    .sub .content article { width:100%; }
}