#container{
    padding:0;
    width: 100%;
    max-width: 100%;
}
.sub-top{
    background-image: url(/data/board_bg/pc_staff_bg.jpg);
}
.staff-wrap picture{
    display: block;
}
.staff-wrap picture img{
    display: block;
    width: 100%;
}

@media all and (max-width:768px){
    .sub-top{
        background-image: url(/data/board_bg/m_staff_bg.jpg);
    }
}