Shadows not visible in model (Unity3d)

Unity Engine
1

I Have model with rung Screenshot by Lightshot. But If I move forward - then shadews of runs not visible Screenshot by Lightshot. My lighting settgins Screenshot by Lightshot. My direction light in scene: Screenshot by Lightshot

2

Directional light shadow type is “no shadows”…?

3

I change shadow type to Hard shadow, result the same prntscr.com/a9r6z2

4

What are your quality settings, and what material/shader the model is using?

Or is shadow visible if you look nearer to the steps? (quality settings have Shadow Distance option)

5

My quality settings: Screenshot by Lightshot. I use Standard shader Screenshot by Lightshot. Shadow visible if I far and look some angle.

6

if you put default unity cube there over the steps, does it cast shadows?

7

No I dont see shadows. I dontt understand why I not see any shadows.