In web design applications, when we cannot completely give up the use of tables, in order to achieve the desired effect, we must use table nesting (especially multi-layer nesting) for layout. Many colleagues may have encountered this problem. In order to achieve the display effect, it is necessary to write different CSS codes or add different attribute values for each (each layer) table. The code written in this way has very poor readability and is inconvenient to modify and manage. This problem will be easily solved once you learn to use pseudo-classes in CSS. Let’s take a look at my solution. 1. [Picture] table.jpg 2. [Code]