#top_nav{
display: none !important;
}
#sideBar{
display: none !important;
}
#mainContent .forFlow {
    margin-left: 1em;
}
#mainContent{
    margin-left:0 ;
}
body{
    background: url(https://lmg.jj20.com/up/allimg/1114/113020142315/201130142315-1-1200.jpg) no-repeat;
}