Circle 阅读助手

# Design Brief: Minimal Monochrome (with Soft & Friendly)

Monochrome palette with a single accent color, hairline dividers, and generous whitespace.

## Design Tokens

```css
:root {
  --background: #f8fafe;
  --surface: #eeeeee;
  --foreground: #1b1b1b;
  --muted-foreground: #808580;
  --accent: #4b9f50;
  --radius: 9999px;
  --font-heading: "Noto Sans", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Noto Sans", ui-sans-serif, system-ui, sans-serif;
}
```

Color area ratio: Background #F8FAFE (~56%) · Surface #EEEEEE (~34%) · Text #1B1B1B (~5%) · Muted Text #808580 (~2%) · Accent #4B9F50 (~3%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Headline Over Large Product Shot
- Navigation: Full-Width Top Bar
- Theme & density: Light · Airy
- Border radius & elevation: Pill; use elevation shadows to separate layers
- Primary visual medium: Interactive Hero Demo / Tool
- Conversion CTA: Download App / Install Extension · Trust bar uses Live Generated Output Showcase
- Headline hook: Pain Relief & Replacement
- Hero components: Large Hero Product Shot, Interactive Hero Tool
- Spatial layout notes: Headline Over Large Product Shot hero structure paired with download app / install extension CTA and live generated output showcase.
- Visual summary: Minimal Monochrome (Light canvas, airy density) featuring headline over large product shot layout and interactive hero demo / tool visuals.

## Avoid

- Multi-stop neon gradients
- Heavy drop shadows
- More than one competing accent color

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.