#main {
    margin-top: 6px;
    background-color: rgba(245, 245, 245, 0.78);
    margin-bottom: 0px;
}
#blogTitle, #main, #footer {
 
    position: relative;
    margin: 0 auto;
}
body { 
     background-color:  #efefef;
     background-image:url(https://images.cnblogs.com/cnblogs_com/safelanding/1479521/o_min2.png); 
     background-repeat: no-repeat; 
     background-attachment: fixed; 
     background-position: center 0; 
     background-size: cover; 
    padding-top:0px;
  }