/* body */
/* safariのスクロールを禁止する */
body{
    position: fixed;
    left: 0;
    right: 0;
    overflow: hidden;
  }
  
  /* stage */
  .nxa-stage{
      width:300px;
      height: 250px;
      background-color: #000;
      position: relative;
  }
  /* nxa-tapareas */
  .nxa-taparea{
      width:300px;
      height:250px;
      position: absolute;
      z-index: 2;
      overflow: hidden;
  }
  
  /* nxa-bg */
  .nxa-bg{
      width:300px;
      height:250px;
      position: absolute;
      z-index: 1;
  }