css3写不规则样式背景

Question

请问下这种下方不规则的背景如何用css3写呢？因为用图片，移动端太消耗流量了

Answer 1

I wrote one using CSS. The writing is rather sloppy and the effect is not exactly the same. That’s pretty much what it means.
If you want to achieve consistent results, the parameters must be adjusted.

http://codepen.io/anon/pen/YqzOQp

Answer 2

You can consider svg

Answer 3

Use the horizontal tangent line of the curve vertically, divide it into four p's horizontally according to the center of the graphic, and then set the ellipse border radian. . This is what I think now