CSS - 中间含数字的圆圈
12
<span style="width:17px;height:17px;top:17px;line-height:17px;border-radius:15px;font-size:12px;background:#FF0000;color:#FFFFFF;">12</span>
12
<span style="width:17px;height:17px;top:17px;line-height:17px;border-radius:15px;font-size:12px;background:#FF0000;color:#FFFFFF;">12</span>