.node-box{height:70px;width:160px;padding:10px;display:flex;align-items:center;justify-content:center}.node-tips{position:absolute;width:150px;background-color:red;color:#fff;padding:10px;border-radius:6px;top:-75px}.node-tips:after{content:"";position:absolute;bottom:-6px;left:75px;width:0;height:0;border-color:transparent;border-style:solid;border-width:6px;border-bottom-width:0;border-top-color:red;filter:drop-shadow(0 2px 12px rgba(0,0,0,.03))}