.banner{
  width:100%;
}
.banner .banner_tp{
  width:100%;
}
.content{
  margin:0 auto;
   width:1036px;
border:1px solid #e5e5e5;
margin-bottom:55px;
padding-bottom:20px;
}
.sidenav{
   
  width:220px;
  float:left;
  padding-top:15px;
  padding-left:10px;
}
.main_content{
  width:795px;
  float:left;
}