Design a light-mode mobile app interface screen: tactile civil engineering clarity wrapped in warm bone surfaces and sunlit terracotta accents.
LAYOUT
The vertical rhythm follows a deliberate story arc: elevated app bar with brand mark, followed immediately by an expansive hero promo card anchored with twin pill CTAs. Beneath the hero, a horizontal trio of tinted pastel tiles introduces high-level pillars (identity, services, safety). The layout transitions downward into an editorial project showcase initiated by a standardized section header.
PALETTE (use these exact hex values)
- #FAF8F5 — Canvas Ground: dominant screen background providing warm, paper-like warmth across all views
- #FFFFFF — Pure White: icon button badges, secondary action pills, and floating control backings
- #18202F — Charcoal Slate: primary display typography, brand logo text, and section titles
- #5F6978 — Muted Slate: supporting body text, card descriptions, and secondary metadata
- #EE6146 — Terracotta Orange: primary interactive CTA fill, brand chevron mark, and active carousel indicators
- #FEF5E7 — Pastel Ochre: tinted background fill for company profile quick-action card
- #EFF8F0 — Pastel Sage: tinted background fill for services directory quick-action card
- #F3F1FE — Pastel Lavender: tinted background fill for safety compliance quick-action card
- #2C64B4 — Cobalt Category: solid pill tag fill marking commercial sector project types
TYPOGRAPHY
Typeface Plus Jakarta Sans (or Inter, DM Sans, General Sans), weights 400/500/600/700/800. Sizes 11px caption, 13px body-sm, 14px body, 16px body-lg, 20px heading, 32px display. Tracking -0.03em display, 0.05em eyebrow caps. Plus Jakarta Sans delivers structural mass and architectural discipline without feeling brutalist or utilitarian. The extreme boldness of display headlines projects industrial reliability, while generous apertures and balanced proportions maintain effortless readability on handheld screens. Inter or General Sans can seamlessly substitute while maintaining geometry.
GEOMETRY & SPACING
Corner radii — cards 24px, links 999px, inputs 12px, buttons 999px. Spacing on a 8px unit, 16px gaps, 32px between sections, 390px container, comfortable density.
DEPTH
Depth is created purely through layered surface values and full-bleed image containers rather than heavy drop shadows. Elevated elements, like circular navigation buttons and secondary pills, rely on crisp white fills over the #FAF8F5 canvas. A hairline neutral border (#EAE7E1) provides edge separation in place of blur-heavy elevation.
IMAGERY
Photography captures real-world structural competence: heavy yellow earthmovers in golden-hour daylight and finished architectural achievements at twilight with warm interior lighting. Imagery must never look like sterile generic corporate stock; it emphasizes authentic ground textures, active jobsites, and precision glasswork.
SIGNATURE DETAIL — the thing that makes this design itself
The signature element is the combination of warm bone canvas (#FAF8F5) framing heavy industrial imagery, highlighted by pastel tri-color feature cards and soft terracotta pill CTAs. Misuse occurs when designers swap the terracotta for generic yellow or eliminate the warm off-white canvas, which reduces the crafted identity back into generic construction software.
MUST
- Anchor cards with a uniform 20px to 24px corner radius across images and tinted backgrounds.
- Use warm terracotta (#EE6146) selectively for primary triggers, active carousel dots, and kickers.
- Pair full-bleed cinematic machinery or architecture photography with dark gradient overlays for guaranteed text legibility.
- Keep navigation icons contained inside circular 44px white pills with subtle hairline borders.
AVOID
- Do not use generic safety yellow or harsh high-visibility neon tones anywhere in the UI.
- Do not pair sharp 0px or small 4px corners with these rounded card components.
- Never render headline copy over raw photography without an underlying legibility shadow or gradient layer.
- Avoid stark cold pure-white (#FFFFFF) as the primary page background.
OUTPUT
Render as a clean, pixel-crisp UI design at roughly 1312:3840. 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 
