第四境界

# Design Brief: Retro & Nostalgic (with Minimal Monochrome)

Pixel typography, classic OS window chrome, or warm vintage print palettes.

## Design Tokens

```css
:root {
  --background: #1c1c1c;
  --surface: #242424;
  --foreground: #8cff4a;
  --muted-foreground: #6b6b6b;
  --accent: #8cff4a;
  --radius: 0px;
  --font-heading: "VT323", ui-sans-serif, system-ui, sans-serif;
  --font-body: "VT323", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "VT323", ui-sans-serif, system-ui, sans-serif;
}
```

Color area ratio: Background #1C1C1C (~92%) · Surface #242424 (~3%) · Text #8CFF4A (~1%) · Muted Text #6B6B6B (~3%) · Accent #8CFF4A (~1%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Full-Bleed Canvas / Video / 3D
- Navigation: No Explicit Nav
- Theme & density: Dark · Airy
- Border radius & elevation: Sharp; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Pure Typography & Geometry
- Conversion CTA: Direct Input / Instant Try
- Headline hook: Direct Action Command
- Spatial layout notes: Full-Bleed Canvas / Video / 3D hero structure paired with direct input / instant try CTA and no explicit trust bar.
- Visual summary: Retro & Nostalgic (Dark canvas, airy density) featuring full-bleed canvas / video / 3d layout and pure typography & geometry visuals.

## Avoid

- Generic modern corporate gradients
- Inconsistent mixing of modern flat UI and retro chrome

Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.