.item_wrapper:after {
  content: "";
  display: block;
  clear: both;
  height: 0;
}

.item {
  width: 500px;
  height: auto;
  padding: 20px;
/*  float: left; */
}

.popupbg {
  position: fixed;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10;
  top: 0;
  left: 0;
  display: none;
}

.popup_wrapper {
/*  width: 500px;
  height: 600px;
*/  position: fixed;
  top: 50%;
  left: 50%;
  margin: -300px 0 0 -250px;
  z-index: 11;
  text-align: center;
  display: none;
}
.popup_wrapper .popup {
  position: relative;
}
.popup_wrapper .img {
  display: inline-block;
/*  width: 500px;
  height: 500px; */
}

.popup_wrapper .caption {
  padding: 10px;
  font-size: 18px;
  color: #fff;
}
.popup_wrapper .close_btn {
  line-height: 30px;
  position: absolute;
  right: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 15px;
  background: #fff;
  margin: -15px -315px 0 0;
  font-size: 24px;
  vertical-align: middle;
  text-align: center;
  cursor: pointer;
}