cfdocument内部html呈现错误的比例

<cfdocument pageheight="11" 
            pagewidth="8.5" 
            unit="in" 
            marginbottom=".7" 
            marginleft="0" 
            marginright="0" 
            margintop="1.1" 
            format="pdf" 
            pagetype="custom" 
            scale="100">

<cfdocumentitem type="header">
  <style type="text/css" media="screen">@import "header.css";</style>
  <div class=header>
    Content
  </div>
<cfdocumentitem>

#top {
position:absolute;
left:0in;
top:0in;
height:.458in;
width:8.5in;
background-color:#770000;
}

<div id="content" 
     style="position:absolute; 
            left:0in; top:0in; 
            width:7in; 
            border:solid; 
            border-width:thin;">