Design a dark-mode mobile app interface screen: deep-space midnight surfaces punctuated by electric blue guidance and luminous squircle portals.
LAYOUT
The mobile layout follows a top-down progression beginning with a compact utility bar and combined search/filter row. The upper third is dominated by a substantial carousel billboard, followed by an evenly spaced 4-column quick-action category dock. Below, section headers trigger horizontal card rails showcasing course imagery.
PALETTE (use these exact hex values)
- #070B13 — Space Background: Deepest dark canvas underpinning all layout containers and screen views.
- #0F1626 — Surface Elevated: Slightly elevated container fills for search bars, filters, and carousel backgrounds.
- #1E2A3E — Border Subtle: Thin outlines on cards, input frames, and category chips for soft edge definition.
- #0072FF — Electric Brand Blue: Primary actionable elements, active pagination indicators, and contextual arrows.
- #FF4E78 — Accent Coral: Notification unread dot and high-urgency activity pings.
- #FFFFFF — Text Pure White: Primary headings, button text, and icon strokes.
- #8C9BB0 — Text Slate Muted: Secondary copy, sub-labels, input placeholders, and inactive pagination beads.
- #53627A — Text Ghost: Tertiary descriptions below category titles and disabled states.
TYPOGRAPHY
Typeface Plus Jakarta Sans (or Inter, SF Pro Text), weights 400/500/600/700. Sizes 11px caption, 12px body-sm, 13px body, 14px body-lg, 16px subheading, 20px heading, 28px display. Tracking -0.02em at display, 0.08em at uppercase tags. The geometric sans-serif communicates contemporary technical polish with high legibility on dark displays. Tight display tracking (-0.02em) gives titles an authoritative, premium tone, while generous spacing on small metadata ensures effortless skimming.
GEOMETRY & SPACING
Corner radii — cards 20px, links 999px, inputs 14px, buttons 12px. Spacing on a 4px unit, 16px gaps, 28px between sections, 390px container, comfortable density.
DEPTH
Depth is created without harsh drop shadows. It uses luminous edge borders (1px solid #1E2A3E), ambient backlight glow behind cutout subjects, and slight value stepping from #070B13 canvas to #0F1626 card surfaces.
IMAGERY
Photography emphasizes cinematic studio portraits with cool blue and magenta key/rim lighting against shadowy backdrops. Subject cutouts integrate seamlessly into container gradients; flat, candid, or daylight stock photography is entirely off-brand.
SIGNATURE DETAIL — the thing that makes this design itself
The luminous squircle category hub: four softly glowing, jewel-tinted gradient rounded tiles resting above two-tiered micro-typography. Misusing it by replacing the glowing tiles with flat outline circles or dropping the secondary descriptive text erodes the app's refined portal aesthetic.
MUST
- Use deep midnight blue (#070B13) as the default background, avoiding true pitch black (#000000).
- Pair photographic subjects with colored rim lighting that matches the adjacent brand blues and purples.
- Restrict bright electric blue (#0072FF) to primary buttons, text links, and active pagination beads.
- Give category icon tiles soft tonal gradient washes that echo their icon color.
AVOID
- Never use pure black #000000 for backgrounds; it destroys the deep atmospheric navy tone.
- Do not outline category squircles with high-contrast white borders; keep borders faint or borderless.
- Avoid loud solid backgrounds on secondary buttons; maintain semi-transparent dark glass.
- Do not use sharp 0px or 4px corners; all interactive cards require at least 12px to 20px radii.
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 
