Ảnh story TikTok khổ dọc

Prompt tạo ảnh

Ultra-modern full-bleed vertical background for a short video about [CHỦ ĐỀ], built for a nine by sixteen phone screen. The upper third carries the focal interest: a soft duotone gradient bloom in [MÀU 1] and [MÀU 2] with two overlapping translucent shapes and a faint halftone dot pattern, plus a few fine light streaks suggesting motion. The middle band is a smooth calm transition. The bottom third is deliberately quiet and slightly darkened so white captions and platform interface elements stay readable, with nothing detailed or busy in it. A gentle film grain and a very subtle vertical light leak run over the whole frame to give it a tactile analogue feel. Edges are darkened just slightly to keep the eye centred. No people, no products, no icons, no interface mockups. Lighting reads as a single soft glow from the upper centre. Trendy, clean and current rather than cluttered, vertical 9:16, no lettering, no text, no watermark.