Design a light-mode mobile app interface screen: rich dark roast photography anchored against crisp white surface cards and electric blue accents.
LAYOUT
The vertical composition is split 40/60. Top 40% is dedicated to an immersive, dark immersive hero containing location picker and the primary CTA banner. The remaining 60% transitions to an off-white canvas featuring a 4-column quick action dock, followed by an asymmetric horizontal product scroll, and finished with a persistent loyalty block.
PALETTE (use these exact hex values)
- #F8F9FA — Canvas Off-White: Background canvas color underpinning the lower half content scroll.
- #FFFFFF — Card White: Surface color for navigation toolbar, product cards, and pill badges.
- #111418 — Dark Hero Base: Background undertone for photographic hero block and rewards card.
- #2563EB — Electric Cobalt: Call-to-action pill fills, active status icons, and stamp indicators.
- #0F172A — Deep Slate: Headings, title text, and high-emphasis body copy.
- #64748B — Muted Slate: Secondary subtitles, category microcopy, and pricing labels.
- #FF6B6B — Coral Badge: Background tint for promotion chips like 'Popular' tag.
- #E2E8F0 — Border Stroke: Delicate 1px borders on product cards and divider rules.
TYPOGRAPHY
Typeface Inter (or SF Pro Display, Plus Jakarta Sans, DM Sans), weights 400/500/600/700. Sizes 10px caption, 12px body-sm, 14px body, 16px body-lg, 18px subheading, 20px heading, 28px display. Tracking -0.02em at display, 0 at body. The typographic tone is effortless, editorial, and geometric. It communicates premium café precision without feeling stuffy or overly ornate. Inter or SF Pro provides neutral scaffolding that lets the richness of the imagery and the electric blue buttons do the emotional lifting.
GEOMETRY & SPACING
Corner radii — cards 20px, links 4px, inputs 12px, buttons 999px. Spacing on a 4px unit, 12px gaps, 24px between sections, 390px container, comfortable density.
DEPTH
Depth is created via soft, diffuse ambient shadows (0 8px 24px rgba(0,0,0,0.04)) rather than sharp directional elevation. The hero dark plate overlaps seamlessly, visually dropping into crisp white raised cards that hover lightly over the canvas. The dark rewards card grounds the base of the page with heavier contrast rather than blur.
IMAGERY
Photographs must be top-down, high-contrast artisanal coffee scenes with textured backgrounds (dark slate, roasted beans, rich crema). Product listing photography departs from the hero: it must be clinical, crisp, isolated glassware with soft directional cast shadows against white studio infinity backgrounds.
SIGNATURE DETAIL — the thing that makes this design itself
The stark half-and-half contrast transition: a brooding, tactile dark-mode photography hero with rounded bottom corners dipping gracefully into an ultra-clean, daylight-fresh white commerce UI anchored by a vibrant blue pill CTA.
MUST
- Keep photographic headers dark, dramatic, and tactile with natural textures.
- Use electric cobalt (#2563EB) strictly for interactive affordances and highlights.
- Maintain uniform 20px rounded corners on content cards.
- Present coffee products on completely clean, transparent, or studio-white backdrops.
AVOID
- Do not extend the dark photographic texture across the full scroll canvas.
- Do not use sharp 0px or square corners on cards or primary buttons.
- Never replace the high-contrast cobalt CTA with muted earth or brown tones.
- Do not clutter product cards with multi-line ingredient descriptions.
OUTPUT
Render as a clean, pixel-crisp UI design at roughly 1280:3840. Flat vector rendering, real legible text, no browser chrome, no device mockup frame, no watermark, no lorem ipsum placeholder blocks. 在 DraPub 中尝试 
