CSS - 实例：对齐 <hr> 元素 - 在线编辑器

          <!DOCTYPE html>
<html>
<body>

  <p>This is some text. This is some text. This is some text.</p>

  <hr style="width:50%;text-align:left;margin-left:0">

  <p>This is some text. This is some text. This is some text.</p>

</body>
</html>
        