Qt5 gtk style

Hello
After upgrading to QT5, my applications become horrible

https://mail.google.com/mail/u/0/?ui=2&ik=a8fb0da745&view=fimg&th=157a75a3b5186c74&attid=0.1&disp=inline&realattid=f_iu219m1p0&safe=1&attbid=ANGjdJ_CPIulvo5QTQabumf-1xvsX8a0F-NTV-x-smLyb797M6AgBxB1DSSZMLh55eLuVWP7q8o-IIA0_s8XdljRRLwsoq4HR5xPOp9OgVAsN-r8jaohZtBPt_lu7tM&ats=1475981492084&rm=157a75a3b5186c74&zw&sz=w1440-h834
https://mail.google.com/mail/u/0/?ui=2&ik=a8fb0da745&view=fimg&th=157a75a3b5186c74&attid=0.2&disp=inline&realattid=f_iu219m221&safe=1&attbid=ANGjdJ9-hSGpO1qGcelb9kcb2CuYeL5NypxPks6kVt2v8yNhG25p2GV-_xuhAllT-v7BdK_JK4nVLPX6_ESZZpL_SJfwhnKDS3_n61A36LJa7ROVo9dG4gHrebZNt0E&ats=1475981492084&rm=157a75a3b5186c74&zw&sz=w1440-h834

I searched the Internet some solutions but nothing worked

STILL I am new little hum in Linux :confused:

Excuse my language, I do not speak English

HELP.

Arrependido Sobre o meu Inglês