.main_logo{width:1024px; margin-left:auto; margin-right:auto; margin-top:167px;}
.bg{width:100%; height:300px; background-color:#DEDFE3; margin-top:20px; margin-bottom:220px;}
.menu{width:1000px; height:300px; margin-left:auto; margin-right:auto;}
.main_bottom{width:1024px; margin-left:auto; margin-right:auto;}