span元素没有边框吗
<span style= "margin:0px;border:-1px;background:#ff0000;border-color:#00f ">
------解决方案--------------------;border:1px
------解决方案--------------------border:1px solid #00f;
------解决方案-------------------- <span style= "padding:3px;border:1px solid #ddd; "> test </span>