what's the difference between GTK 3.14 and 3.18 on the css load

Question

I finish a GTK interface with GTK3.18,and it works well,but when i change to GTK3.14 version,the interface turn out to be very bad,the size and the colore of the widgets is changed,and i find there is no enough information about the GTK3.14 version.

Answer 1

CSS＆＃39; api＆＃39;在3.20之前基本上没有文档和不稳定，所以除非你为每个版本制作一个单独的主题，否则没有任何合理的方法来支持它之前的所有版本。