ttkbootstrap 在界面跳转时美化全部消失
```python
import ttkbootstrap as ttkp
from ttkbootstrap.constants import *
def a():
root1 = ttkp.Window(title="登录", size=(500, 500), position=(700, 250))
l1 = ttkp.Label(root1,text="界面1")
l1.pack()
def x():
root1.update()
root1.destroy()
b()
b1 = ttkp.Button(root1,text="跳转",command=x,bootstyle=(INFO, OUTLINE))
b1.pack()
root1.mainloop()
def b():
root2 = ttkp.Window(title="登录", size=(500, 500), position=(700, 250))
l1 = ttkp.Label(root2,text="界面2")
l1.pack()
def y():
root2.update()
root2.destroy()
a()
b2 = ttkp.Button(root2,text="跳转",command=y,bootstyle=(INFO, OUTLINE))
b2.pack()
root2.mainloop()
if __name__ == '__main__':
a()
```