anchor.diff:              </div>
           </div>
       </div>
  -    
  -    
  -    
  -    
  -    <footer class="footer"  style="background-color:#1abc9c">
  -      <div sytle="bottom:0" class="container">
  -        <div   class="row">
  -          <div class="span7">
  -            <h3 class="footer-title">拾螺人 by jack_lcz</h3>
  -          </div>
  -        </div>
  -      </div>
  -    </footer>
  -    
   </body>
   </html>
positive.code: } 
      </style>
  </head>
  <body>
  
  <div class="container">
      <div class="demo-headline">
          <div class="row demo-row">
              <div class="col-md-3">
                  <a href="#fakelink" class="btn btn-block btn-lg btn-primary">浏览资讯</a>
              </div>
              <div class="col-md-3">
                  <a href="#fakelink" class="btn btn-block btn-lg btn-warning">图片区</a>
              </div>
              <div class="col-md-3">
                  <a href="#fakelink" class="btn btn-block btn-lg btn-default">论坛</a>
              </div>
              <div class="col-md-3">
                  <a href="#fakelink" class="btn btn-block btn-lg btn-danger">视频</a>
              </div>
          </div> <!-- /row -->
  
  
negative.code:             <div class="login-screen">
                  <div class="login-icon">
                      <img src="/images/login/icon.png" alt="Welcome to Mail App" />
                      <h4>心灵连接 & <small>连接你我</small></h4>
                  </div>
  
                  <div class="login-form">
  