Codes work just for mobile

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Hello, I'm fighting with this. If I add code, it works just for mobile, but not for PC. Mostly it is for moving elements (sticky etc.) Why is it like that? You can see it at my page on mobile version. First and second section is with animation, but in PC, there is no animation. 

If anybody can tell me what I did wrong I'll be grateful. Thank you for advices.