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                            - 變量
~~~
@fontsize:12px;

@mySelector: banner;
.@{mySelector} {
  font-weight: bold;
  line-height: 40px;
  margin: 0 auto;
}
~~~

- 混入
 ~~~
.mixin() {
  width:  100%;
  height: 200px;
}
.c{
.mixin();
}
 ~~~
 - 引用父類
 ~~~
a {
  color: blue;
  &:hover {
    color: green;
  }
}
~~~
~~~
 .clearfix {
  display: block;
  zoom: 1;
  &:after {
    content: " ";
    display: block;
    font-size: 0;
    height: 0;
    clear: both;
    visibility: hidden;
  }
}
~~~
輸出
~~~
.clearfix {
  display: block;
  zoom: 1;
}
.clearfix:after {
  content: " ";
  display: block;
  font-size: 0;
  height: 0;
  clear: both;
  visibility: hidden;
}
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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