main > nav {
  margin:30px auto auto 0 ;
}

main > nav::before {
  content:'竕ｪ';
  position:relative;
  top:7px;
  left:-3px;
}


@media print , screen and (min-width: 501px) {
    
  main .backnumber_links dt {
    width:9em;
  }
  
  main .backnumber_links dt + dd {
    margin-top:-1.9em;
  }
  main .backnumber_links dd {
    margin-bottom:.5em;
    margin-left:9em;
    line-height:2em;
  }
  
}

@media screen and (max-width: 500px) {
  main .backnumber_links dd {
    margin-top:0em;
    margin-bottom:1em;
  }

}