#previewBox{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.9);z-index:999999999}
#previewBox .main{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);width:90%;height:85vh;background:#fff;overflow:hidden}
#previewBox .close{position:absolute;right:20px;top:15px;width:40px;height:40px;background:red;color:#fff;font-size:24px;border:none;border-radius:50%;z-index:9999;cursor:pointer}
#previewBox iframe{position:absolute;top:50px;left:0;width:100%;height:calc(100% - 50px);border:none}
#previewBox .pdf-mask{position:absolute;top:50px;left:0;width:100%;height:calc(100% - 50px);background:transparent;z-index:9998}
*{user-select:none!important;-webkit-user-select:none!important}