Hi, Murat, thanks for the link. It looks like there might be multiple things to look at, so lets look at those one at a time.. first, you have a large negative right margin on your hero text, I would remove that.
In general, avoid using any negative values for padding or margins and instead, use the display, float and clears to align your content.
Here is one change to the Hero Title text nested classes on mobile landscape to help fix the text collapsing on each other from your first picture on mobile landscape:
I am checking through more items...