/* world
------------------------*/
#sn-story{
  background:url(../images/world/btn_story_off.png) top left no-repeat;
  background-size:100% auto;
}
  body#story #sn-story{
    background:url(../images/world/btn_story_on.png) top left no-repeat;
    background-size:100% auto;
  }
#sn-aragami{
  background:url(../images/world/btn_aragami_off.png) top left no-repeat;
  background-size:100% auto;
}
  body#aragami #sn-aragami{
    background:url(../images/world/btn_aragami_on.png) top left no-repeat;
    background-size:100% auto;
  }
#sn-jinki{
  background:url(../images/world/btn_jinki_off.png) top left no-repeat;
  background-size:100% auto;
}
  body#jinki #sn-jinki{
    background:url(../images/world/btn_jinki_on.png) top left no-repeat;
    background-size:100% auto;
  }