css display:table圣杯布局

<div id="wrapper">
    
    <header>
        <img src="../../img/img/d.jpg" width="50px"/>
        <h1>A table layout</h1>
          
    </header>
    <div id="dd">
    <nav>
        <ul>
            <li>1</li>
            <li>1</li>
            <li>1</li>
            <li>1</li>
            <li>1</li>
            
         
            
        </ul>
        
    </nav>
    
    <div id="article">
        <h1>demo</h1>
    <p> ddddddddddddddddd
    </p>
    
    <h1>demo1</h1>
    <p> dddddd</p>
    <h1>demo1</h1>
    <p> dddddd</p>
    <h1>demo1</h1>
    <p> dddddd</p>
    <h1>demo1</h1>
    <p> dddddd</p>
    
    
    </div>
    
    <aside>
         
        <h3>demo00</h3>
        <p>dafafaf</p>
        <h3>demo00</h3>
        <p>dafafaf</p>
        <h3>demo00</h3>
        <p>dafafaf</p>
        <h3>demo00</h3>
        <p>dafafaf</p>
         
         
    </aside>
    </div>
    <footer>this  is footer</footer>
</div>
<style>
    header{background: #f00;display: table-row}
     
    header img{float:left}
    header h1::after{content: "";clear: both;display: block;}
    
    footer{background: #FF0000;font-size: 20px;text-align: center;
    display: table-row;}
    *{margin: 0;padding: 0;}
    nav li{list-style: none;}
    #wrapper{display:table;width:960px;border: 10px solid  royalblue;margin:  0 auto;}
    
    
    nav{display:table-cell;width: 150px;background: orange;padding: 10px;}
    
    div#dd{width: 100%;display: table;}
    
    #article{background: #ffed53;padding: 10px;display: table-cell;}
    #article p{word-wrap: break-word;padding:10px ;}
    aside{width: 210px;display:table-cell;background: darkgray;}
     
</style>