- W3C标准盒模型
实际宽=weight+左右内边距+左右边框
实际高=height+上下内边距+上下边框
box-sizing:content-box
- 怪异盒模型(IE盒子模型)
实际宽=weight
实际高=height
box-sizing:border-box
实际宽=weight+左右内边距+左右边框
实际高=height+上下内边距+上下边框
box-sizing:content-box
实际宽=weight
实际高=height
box-sizing:border-box