#preview_container {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 9999;
}
#preview_container #close_btn {
  position: absolute;
  right: 10%;
  top: 5%;
  color: #ffffff;
  font-size: 50px;
  z-index: 999;
  cursor: pointer;
}
#iphone {
  width: calc(90vh * 640 / 1124);
  height: 90vh;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  background-image: url(../img/ipone.png);
  background-size: 100% 100%;
  background-repeat: no-repeat;
}
#iphone #preview_content {
  background-color: white;
  position: absolute;
  left: 15%;
  top: 16%;
  width: calc(70% - 20px);
  height: 68%;
  overflow-y: scroll;
  cursor: pointer;
  text-align: justify;
}
#iphone #preview_content .form_title {
  display: block;
  font-size: 17px;
  font-weight: bold;
  text-align: center;
  margin-top: 16px;
}