Split-screen vertical composition: LEFT SIDE shows old rusty traditional radiator in cold blue-grey tones, desaturated, ugly apartment corner, sad mood lighting. RIGHT SIDE shows vibrant modern WH designer radiator in warm white finish, contemporary interior with wooden floor, bright natural light, saturated warm colors. Clear diagonal division line. Visual contrast storytelling: problem vs solution, old vs new. The modern radiator glows with warmth, occupies right 50% in sharp focus. ТЕКСТ НА БАННЕРЕ (СТРОГО НА РУССКОМ): "Выберите дизайн-радиатор от 11 000". Bold white text centered across middle division line, dark stroke outline for visibility on both sides, 75pt font.