.triangle_box{background:#fff;display:none;left:50%;position:absolute;top:calc(100% + 1.28rem);transform:translateX(-50%);z-index:1}.triangle_box::after,.triangle_box::before{bottom:100%;left:50%;border:solid transparent;content:" ";height:0;width:0;position:absolute;pointer-events:none}.triangle_box::after{border-color:rgba(255,255,255,0);border-bottom-color:#fff;border-width:12px;margin-left:-12px}.triangle_box::before{border-color:transparent;border-bottom-color:rgba(0,0,0,0.08);border-width:13px;margin-left:-13px}