css地图标注三角形效果

效果如下

image.png

.map_label02 {
    color: #fff;
    font-size: 14px;
    width: 120px;
    height: 30px;
    line-height: 20px;
    font-family: "Microsoft YaHei";
    text-align: center;
    background: rgba(12, 181, 106, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
.map_label02::before {
    content: "▼";
    position: absolute;
    left: 55px;
    top: 22px;
    font-size: 20px;
    color: rgba(12, 181, 106);
  }