Solve the problem of Qt GroupBox border not showing in Linux environment

PS: Practice is the only standard to test the truth is really right, thought very simple thing, often by oneself make very complex, here record

QT creates a GroupBox auto-display border in the Windows environment,

The effect is as follows

However, in the Linux environment, QT creates a groupbox, and the border disappears.

And then thought it was groupbox. property setting problem

The result was found in the attribute for half a day did not find the corresponding attribute.

Finally, right-click to change style sheet to resolve

Final effect

PS: Practice is the real truth Ah!