less的混入传值

 .sanjiao(@width,@width2){
            
              &::before{
                content: '';
                display: block;
                position: absolute;
                bottom:0 ;
                right: @width2;
                width: 0;
                height: 0;
                border-bottom:  @width solid @mainHightColorBlue;
                border-left:  @width solid transparent;
            }
            &::after{
                content: '';
                display: block;
                position: absolute;
                bottom:0 ;
                right: 0;
                width:  @width2;
                height:  @width;
                background: @mainHightColorBlue;
                
            }
        }

//使用的时候
 .sanjiao(3px,18px)