四行业广告横幅网格

Create a polished 2x2 advertising banner grid for four different industry campaign concepts.

Grid structure: four equal quadrants with consistent spacing, matching border radius, and a clean presentation-board layout. Each quadrant should feel like a finished ad banner, not a rough sketch.

Quadrants:
- Skincare: premium serum hero with soft light, clean benefit copy, and gentle botanical detail.
- Food: appetizing restaurant offer banner with plated dish, warm lighting, and clear call-to-action area.
- Travel: destination campaign banner with scenic depth, luggage or postcard cue, and spacious headline area.
- SaaS: modern product dashboard banner with interface cards, automation lines, and crisp value proposition space.

Design rules: keep each ad visually distinct while preserving one overall art direction. Use readable text blocks, clear product or service focus, and mobile-friendly composition.

Finish: AI ad banner grid prompt example, 2x2 advertising banner grid, paid social creative board, multi-industry ad concepts, campaign moodboard for agencies.