Design a dark-mode mobile app interface screen: sleek charcoal aerodynamics balanced with vivid coral ignition points for high-end motorcycle acquisition.
LAYOUT
The mobile layout follows a strict top-to-bottom conversion hierarchy tailored for compact screens. The top zone combines an understated status bar and app header followed immediately by an asymmetrical hero pairing left-stacked copy with an overflowing right-aligned bike render. Below the hero CTA sits a 3-column micro-card utility row, followed by a comprehensive 'Why riders choose us' split-feature card, concluding with category filter carousels.
PALETTE (use these exact hex values)
- #0d0f12 — Obsidian Ground: Primary mobile viewport background providing deep contrast for cutout vehicle imagery.
- #16191f — Charcoal Elevation: Background fill for structural feature modules, nested cards, and large media containers.
- #222730 — Graphite Stroke: Subtle boundary definition on card perimeters and nested icon containers.
- #f26457 — Ignition Coral: High-priority actions, key headline text highlighting, and interactive text links.
- #ffffff — Pure White: Display headings, active values, and primary button typography.
- #8d94a0 — Steel Mist: Supportive body descriptions, subheaders, and passive metadata across cards.
- #3cd178 — Mint Pulse: Eyebrow tag text and badge icon tint for active terms and flexibility.
- #3b82f6 — Azure Shield: Financial badge iconography highlighting low monthly payments.
- #8b5cf6 — Iris Network: Social and dealer verification indicators in horizontal card rows.
TYPOGRAPHY
Typeface SF Pro Display (or Inter, Plus Jakarta Sans, Helvetica Neue), weights 400/500/600/700. Sizes 11px caption, 13px body-sm, 14px body, 15px body-lg, 17px subheading, 20px heading, 30px display. Tracking -0.02em at display, 0.01em at body. The typographic tone is athletic, precise, and understated, relying on a modern geometric sans-serif (resembling SF Pro Display or Inter). Generous negative letter-spacing (-0.02em) on display titles generates a tight, mechanical cadence suitable for automotive performance, while regular-weight neutral gray body text remains effortless to scan. For cross-platform execution, Inter or Plus Jakarta Sans serve as direct drop-in open-source substitutes.
GEOMETRY & SPACING
Corner radii — cards 20px, links 4px, inputs 14px, buttons 16px. Spacing on a 4px unit, 12px gaps, 28px between sections, 390px container, comfortable density.
DEPTH
Depth is created purely via chromatic value stepping rather than heavy drop shadows. Surfaces rise from canvas #0d0f12 to elevated cards at #16191f and inner icon vessels at #1d212a, delineated by precise 1px borders in #222730. Vehicle photography achieves dimensional separation through a low-intensity atmospheric crimson back-glow.
IMAGERY
Photography focuses on high-end dark studio aesthetics featuring monochromatic black sport motorcycles and riders in full matte/leather technical gear against black backgrounds. Lighting is stark and directional, producing razor-sharp highlights along vehicle fairings and helmet visors. Saturated outdoor or casual lifestyle photos are strictly off-brand.
SIGNATURE DETAIL — the thing that makes this design itself
The dual-tone headline typography paired with the asymmetric composite CTA button (coral rounded-rectangle encasing an inset white circular directional glyph). This combination delivers immediate sport-performance visual cues while clearly signaling the primary interaction path.
MUST
- Reserve #f26457 coral exclusively for direct conversion buttons, text emphasis, and unread alerts.
- Enclose all visual feature icons within 36-40px squircle containers with colored glyphs.
- Maintain consistent 20px corner radii across all outer structural cards and media frames.
- Pair pure white #ffffff for headings with #8d94a0 for supportive subheadings to enforce contrast.
AVOID
- Do not apply solid vibrant fills behind feature icons; restrict colors to outline glyphs on dark fills.
- Do not use sharp 0px or pill 999px radii on structural content cards.
- Never tint main body text with colored tones; keep it strictly neutral slate (#8d94a0).
- Do not place stark white backgrounds anywhere in the interface.
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 
