zhongshen_project/app/component/view/rich_text/css/design.css

.draggable-element .rich-text .preview-draggable{word-break: break-all;}
.rich-text{max-width:100%;}
.rich-text img{max-width:100%!important;}
.rich-text .preview-draggable{
    word-wrap: break-word;
    white-space: pre-wrap;
    word-break: break-all;
    /*overflow: hidden;*/
}