AI 编程助手发布竖版广告

A modern vertical billboard advertisement layout. Upper two-thirds is a deep navy gradient background with a single clean serif headline in large pure white sans-serif type that reads "Code Ten Times Faster". Lower third shows a centered floating laptop with a generic abstract code editor interface glowing softly. A small minimalist CTA button at the very bottom reads "Get Started". Subtle film grain texture, sophisticated tech brand aesthetic, vertical 9:16 composition. No logos, no specific product name, no watermark. Crisp typography rendering, photorealistic device, premium ad design quality.