DedeV6/public/static/ckeditor/plugins/preview/styles/screen.css

div[style*="page-break-after"] {
	background:url( ../images/pagebreak.gif ) no-repeat center center;
	clear:both;
	width:100%;
	border-top:#999 1px dotted;
	border-bottom:#999 1px dotted;
	padding:0;
	height:7px;
	cursor:default;
}