把页面主体内容限定在安全区内
padding-top: constant(safe-area-inset-top); padding-top: env(safe-area-inset-top); padding-bottom: constant(safe-area-inset-bottom); padding-bottom: env(safe-area-inset-bottom); padding-left: constant(safe-area-inset-left); padding-left: env(safe-area-inset-left); padding-right: constant(safe-area-inset-right); padding-right: env(safe-area-inset-right);