._dialog {
  position: fixed;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  overflow: hidden;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.2s;
}
._dialog_marsk {
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.7);
}

._dialog_content {
  text-align: center;
  width: 100%;
  height: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
}

._dialog_img {
  width: 100%;
  height: auto;
}

._dialog-show {
  width: 100vw;
  height: 100vh;
  opacity: 1;
}