r>
	<iframe width="560" height="315" src="http://www.youtube-nocookie.com/embed/uvF1XuseZFE?rel=0"
		    frameborder="0" allow="autoplay; encrypted-media" allowfullscreen
		    style="display:block; margin:0 auto"></iframe>
	<br>
	(这里是一个相似的教程，仿宜家风格的：)
	<br><br>
	<a target="_blank" href="./pdf/leitner.pdf" style="display: block; text-align: center;">
	<img src="./pdf/thumbnail.png" width="450"/><br>点击下载PDF</a>
</span>
<span id="gift_app_anki">
	链接
	<a target="_