Sleek dark-mode promo banner for AI platform "Doitong". Matte black background with faint teal and violet ambient light. Left side: large bold white title "Все нейросети в одном месте", keyword accent in bright mint-turquoise (#2DE0C0). Right side: floating rounded glass cards with glowing AI/neural icons and sparkles. Bottom: coral-orange rounded pill button (#FF6A4D) "Учись бесплатно". Small tagline "Оплата российской картой" with card icon. Futuristic, clean, premium tech look, soft glow, crisp legible typography. 16:9
