first-letter小记

<style>
.point-num:first-letter{
    font-size:1.3334em;
  }
</style>
<p  class="point-num"><span>8.9</span><p> 
<p ><span  class="point-num">8.9</span><p> 
<div  class="point-num"><span>8.9</span><div>

first-letter对span直接作用时无效，用别的标签