Since the stars don't move, why are some constellations visible only in winter and invisible in summer, and their positions in the sky will move with time, such as Orion?

1 the star will not move is a false proposition, depending on the reference.

A star can be regarded as stationary relative to another star, such as the sun and Orion in our galaxy.

The earth is moving relative to the sun, no matter how it rotates, it will produce relative motion, so people on the earth will have different celestial landscapes at different times, even in the same position.

Polaris has been due north for many years. Sirius can see in winter, but not in summer.

This can be explained by a simple metaphor.

Suppose the sun, Sirius and Polaris are three ships in the sea, and you are in the ship of the sun.

1 Three ships are heading at the same speed. You can also think that they are not moving.

Suppose Sirius is on your left, Polaris is in front of you, and you are in the boat. Go straight ahead.

You will see that the position of Sirius on the left has changed, and you can't even walk.

But the Polaris in front is always straight ahead. If Polaris is far enough away from you, you won't even notice that it is getting closer, but its relative position with you has actually changed.