利用 transform-origin: left top ,以左上角为基点缩放。
position: absolute; right: -1px; top: -8px; height: 28px; padding: 0 8px; background: #BBBBBB; border-radius: 1px; color: #FFFFFF; font-weight: 400; line-height: 28px; box-sizing: border-box; transform-origin: right top; font-size: 20px; transform: scale(0.5);