iframe {
  display: block;
  border: none;
  height: 100vh;
  width: calc(100% + 18px);
}
.frame {
  overflow-x: hidden;
}

.j{
    width: 100%; height:100px; bottom: 0;
    position: fixed; background:#fff;
  }
  .j-1{
    width: 20px; height:100%;
    position: fixed; background:#fff; 
    left: 0;
  }
  }
  .k-1{
    width: 20px; height:100%;
    position: fixed; background:#fff;
    right: 0;
  }