.box-020{box-sizing:border-box;color:#333;line-height:1.6;margin:20px auto;padding:1.5em;position:relative;width:100%}.box-020:after{border-color:rgba(0,0,0,.15) #fff;border-style:solid;border-width:0 20px 20px 0;box-shadow:-1px 1px 1px rgba(0,0,0,.1);content:"";position:absolute;right:0;top:0}