HTML css implementation code of rounded rectangle_HTML/Xhtml_web page production

I had nothing to do, and suddenly I remembered the realization of a rounded rectangle. But everyone has been talking about this topic for too long. Various implementation solutions can be seen online. Here I just record the one that I think is better. This solution does not use any images, it is a pure html css implementation.
css code ==================================

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The code is as follows:

html code============ =========================

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The code is as follows:

< ;b class="spiffy1">



< ;/b>

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If you are interested, try the two pieces of code above.
Although this solution is relatively good, I still came up with a similar but simpler implementation. Haha, I will introduce it in a later article.