#viewer-div canvas{position:absolute;top:50%;left:50%;will-change:transform}.upload-demo,.upload-demo .el-upload,.upload-demo .el-upload .el-upload--text,.upload-demo .el-upload .el-upload__text{width:100%;height:100%}.upload-demo .el-upload .el-upload-dragger,.upload-demo .el-upload .el-upload__text{width:100%;height:100%;display:flex!important;flex-flow:wrap;justify-content:center;align-items:center}.el-collapse .el-collapse-item__content{padding-bottom:0}