.prefBox_flex{
 display: flex;
}
.prefBox_content_bdr{
  border: 1px solid #e5e5e5;
  box-shadow: 0 2px 0 #d1d1d1;
  padding:20px 30px 20px 20px;
  position:relative;
}
.prefBox_content{
  width:50%;
  padding:20px;
}
@media (max-width: 767px) {
  .prefBox_content_bdr{
    padding:10px 20px 10px 10px;
  }
  .prefBox_content_bdr_kansai{
    padding:10px 20px 10px 10px;
  }
  .prefBox_content{
    width:100%;
    padding:20px;
  }
  .prefBox_flex{
   display: block;
  }
}
.prefBox_window_after:after{
  content: "";
  background-repeat: no-repeat;
  position: absolute;
  top: 50%;
  right: 5px;
  margin-top: -4.5px;
  background-image: url('https://www.au.com/content/dam/au-com/information/notice_electricity/images/icon_sprite.png');
  background-position: -9px -78px;
  width: 9px;
  height: 9px;
  background-size: 101px 93px;
}
.prefBox_content .prefBox_link:hover{
  text-decoration: none;
  opacity: 0.6;
}
.prefBox_window_after:hover:after{
  background-position: -80px -68px;
  background-size: 101px 93px;
}
.prefBox_link{
  display:block;
}

.prefBox_link_inline{
  display: inline-block;
}