html,body {
    height:100%;
}
* {
    margin:0;
    padding:0;
}
.close_bgmask {
  transition: transform .5s;
}
.close_bgmask:hover {
  transform: scale(1.2);
}
.close_bgmask:after {
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:36px;
  height:6px;
  margin-left:-18px;
  margin-top:-3px;
  transform: rotateZ(45deg);
  background-color: #fff;
}
.close_bgmask:before {
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:36px;
  height:6px;
  margin-left:-18px;
  margin-top:-3px;
  transform: rotateZ(-45deg);
  background-color: #fff;
}
/* .img_bgmask:before {
    content:"";
    vertical-align: middle;
    display: inline-block;
    height:100%;
} */

.img_bgmask .view_img_wrap {
    position: absolute;
    left:50%;
    top:50%;
    width:40%;
    vertical-align: middle;
    cursor:move;
    z-index: 1002;
}
.img_bgmask .view_img_wrap img {
    width:100%;
    height:100%;
    position: relative;
    z-index: -1;
}
.img_bgmask .close_bgmask:hover {
    background: url(../close_bgmask_hover.html);
}