css3圆角border-radius制作尖角。

Question

请问这样的尖角用css3的border-radius怎么写？右上的圆角是向外凸的符合常理，为何右下的圆角可以向外凹的，求代码和分析。

Answer 1

This article has the answer you want. Read it carefully and you will know.
When is the autumn moon? How much do you know about CSS3 border-radius?

Answer 2

border-radius