samtto
<div style="position: relative; padding: 30% 45%;">
<iframe style="position: absolute; width: 100%; height: 100%; left: 0; top: 0;"src="//player.bilibili.com/player.html?aid=18316187&bvid=BV1tW411q7KM&cid=40592634&page=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true" sandbox="allow-top-navigation allow-same-origin allow-forms allow-scripts"></iframe>
</div>
效果可以看我的博客：https://yirenliu.cn/archives/fangdongdemao-chashanliu
