A minimalist call-to-action slide with a completely solid, plain dark background (matching the dark blue-grey tones from the classroom screen in the cover). In the exact center, there is clean and modern typography: the main word 'Подписывайся' in a large, bold, premium golden sans-serif font. Directly below it, the subtitle 'тут про речь и публичные выступления' is written in a clean, crisp, medium-sized white sans-serif font. Floating subtly around the text on the plain background are delicate, glowing neon line-art physics icons (such as a glowing blue magnet, a golden atom, a light prism, and Newton's cradle), creating a cohesive, stylish, and professional look that matches the previous physics series.
