利用背景色，实现进度条

<div style="border:solid 1px red;width:100px;display:inline-block;z-index:-2;border-radius: 5px;">
<div style="width:50px;background: linear-gradient(45deg, #ff9700, #ed1c24);background-position: left;margin-left: 0;"><span title="">7/8</span> 
</div></div>

 效果如下

7/8