.faq_offon {
   display: none;
   background: #f6f6f6;

   .box {
      font-size: 12px;
      line-height: 1.5;
      margin-left: 15px;
      padding: 15px 30px 15px 30px;
      background: url(../images/faq/a.png) 0 15px no-repeat;
      background-size: 18px 16px;
   }
}

.area.is-active {
   .question {
      background-color: rgb(246, 246, 246);
   }

   .faq_offon {
      display: block;
   }

   .plus_minus {
      background-position: 0px -23px;
   }
}