以下为引用的内容：

    /* hbox and vbox classes */
    
      .hbox {
              display: -webkit-box;
              -webkit-box-orient: horizontal;
              -webkit-box-align: stretch;
      
              display: -moz-box;
              -moz-box-orient: horizontal;
              -moz-box-align: stretch;

      
              display: box;
              box-orient: horizontal;
              box-align: stretch;
      }
      
      .hbox> * {
              -webkit-box-flex: 0;
              -moz-box-flex: 0;
              box-flex: 0;
              display: block;
      }
      
      .vbox {
              display: -webkit-box;
              -webkit-box-orient: vertical;
              -webkit-box-align: stretch;
      
              display: -moz-box;
              -moz-box-orient: vertical;

              -moz-box-align: stretch;
      
              display: box;
              box-orient: vertical;
              box-align: stretch;
      }
      
      .vbox> * {
              -webkit-box-flex: 0;
              -moz-box-flex: 0;
              box-flex: 0;
              display: block;
      }
      
      .spacer {
              -webkit-box-flex: 1;
              -moz-box-flex: 1;
              box-flex: 1;
      }
      
      .reverse {
              -webkit-box-direction: reverse;
              -moz-box-direction: reverse;
              box-direction: reverse;
      }
      
      .boxFlex0 {
              -webkit-box-flex: 0;
             -moz-box-flex: 0;
              box-flex: 0;
      }
      
      .boxFlex1, .boxFlex {
              -webkit-box-flex: 1;
              -moz-box-flex: 1;
              box-flex: 1;
      }
      
      .boxFlex2 {
              -webkit-box-flex: 2;
              -moz-box-flex: 2;

              box-flex: 2;
      }
      
      .boxGroup1 {
              -webkit-box-flex-group: 1;
              -moz-box-flex-group: 1;
              box-flex-group: 1;
      }
      
      .boxGroup2 {
              -webkit-box-flex-group: 2;
              -moz-box-flex-group: 2;
              box-flex-group: 2;
      }
      
      .start {
              -webkit-box-pack: start;
              -moz-box-pack: start;
              box-pack: start;
      }
      
      .end {
              -webkit-box-pack: end;
              -moz-box-pack: end;
              box-pack: end;
      }
      
      .center {
              -webkit-box-pack: center;
              -moz-box-pack: center;
              box-pack: center;

      }

以下为引用的内容：

<div class="hbox center">
    <div class="vbox center">
        <div>...</div>
        <div>...</div>
    </div>
</div>

以下为引用的内容：

<form action="handler.cgi" method="POST" class="hbox">
        <div class="vbox">
                <label>First Name (required):</label>
                <label>Last Name:</label>
        </div>
        <div class="vbox">
                <input type="text" name="first"/>
                <input type="text" name="last"/>
                <input type="submit"/>
        </div>
</form>