/* loading_icon */
.preload{
    position: fixed;
    background: url(../i/loading_icon.gif) center center no-repeat;
    
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
}
.preload.preload_background{
    position: fixed;
    background: url(../i/loading_icon.png) center center no-repeat;
  
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 998;
}
.cover{
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(0,0,0, 0.7);
    z-index: 997;
    display: none;
}