Less 的用法

@red:red;
@w:200px;
#big{
    width:@w;
    height:@w;
    background-color:@red;
    #small{
        width:@w;
        height:@w;
        background-color:@red;
    }
}
p{
    color:@red;
}

.bt{
    width:200px;
    height:200px;
    border-top:2px solid red;
    background-color:red;
}
#big{
    .bt;
    #small{
        .bt;
    }
}

#box{
    width:100%;
    height:60px;
    background-color:#ccc;
    h3{
        width:100%;
        height:20px;
        background-color:yellow;
    }
    ul{
        list-style:none;     
        li{
            height:40px;
            line-height:40px;
            float:left;
            padding:0 10px;
        }
    }
}

@color:#333;
#box{
    width:100%;
    height:60px;
    background-color:@color+#111;
}

@var:50vh/2;
#box{
    width:calc(50% + (@var - 20px));
}

@base:#f04615;
@width:0.5;
#box{
    width:percentage(@width);
    color:saturate(@base,5%);
    background-color:spin(lighten(@base,25%),8);
}

//单行注释//
/*多行
  注释*/

@import "other.less";