.my-size-tooltip{pointer-events:none;position:absolute;left:50%;top:-8px;transform:translate(-50%,-100%);background:rgba(0,0,0,.85);color:#fff;padding:3px 6px;border-radius:4px;font-size:12px;white-space:nowrap;opacity:0;transition:opacity .2s ease;z-index:9999}.my-size-tooltip.show{opacity:1}