Feihong

# Feihong

## Philosophy

Wild-cursive (kuangcao) calligraphy given to product surfaces. The page carries the gesture of brush meeting paper at speed — a single confident stroke that cannot be revised mid-flight. Ink-dark handmade-paper ground, cream ink that glows under lamplight, the vermillion seal pressed only where it counts. Calligraphy as performance, not careful penmanship.

### Values

- The single confident stroke over mechanical precision
- Deliberate asymmetry as compositional strength
- Ink-dark foundations that let cream content glow
- Dry-brush texture and organic imperfection as authenticity
- Speed and confidence in every interaction
- Compositional flow following cursive reading order (top-right to bottom-left)
- The vermillion seal reserved for moments that matter

### Anti-Values

- Sterile symmetry and rigid grid alignment
- Light or pastel grounds that lack gravitas
- Rounded friendly rectangles that soften the gesture
- Slow cautious motion that kills momentum
- Borders and accent edges used as chrome

### Visual Character

- background:#0F0E0C; color:#ECE6DA; font-family:'Ma Shan Zheng',serif
- clip-path:polygon(0 2%,99% 0,100% 98%,1% 100%); transform:rotate(-0.6deg)
- box-shadow:0 14px 40px rgba(0,0,0,.55), inset 0 0 60px rgba(0,0,0,.5)
- primary action carries box-shadow:5px 5px 0 rgba(216,57,43,.30)
- background-image:radial-gradient(circle at 18% 24%, rgba(156,144,129,.10) 1px, transparent 1.4px)

## Tokens

### Colors

| Name | Value |
|------|-------|
| bg | `#0F0E0C` |
| surface | `#1B1916` |
| surface_2 | `#23201C` |
| text | `#ECE6DA` |
| muted | `#9C9081` |
| border | `#36312B` |
| accent | `#D8392B` |
| on_accent | `#FBF6EC` |
| gold | `#C8A85E` |
| ink_1 | `#161410` |
| ink_3 | `#332E27` |
| ink_4 | `#4A4339` |
| success | `#6FA06A` |
| warning | `#C8A85E` |
| error | `#D8392B` |
| info | `#7C97A8` |

### Typography

- **Base Size**: 17px
- **Body Font**: Noto Sans SC
- **Heading Font**: Ma Shan Zheng
- **Mono Font**: Source Code Pro
- **Heading Weight**: 400
- **Heading Transform**: none
- **Letter Spacing**: -0.01em
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&family=Noto+Sans+SC:wght@400;500;700&family=Source+Code+Pro:wght@400;500&display=swap

### Radii

- **None**: 0
- **Soft**: 16px
- **Pill**: 9999px
- **Organic Clip**: polygon(0 2%, 99% 0, 100% 98%, 1% 100%)

### Shadows

- **Sm**: 0 2px 10px rgba(0,0,0,.35)
- **Md**: 0 14px 40px rgba(0,0,0,.55)
- **Lg**: 0 28px 70px rgba(0,0,0,.66)
- **Seal**: 5px 5px 0 rgba(216,57,43,.30)
- **Inset Vignette**: inset 0 0 60px rgba(0,0,0,.5)

### Spacing

- **Base**: 8px
- **Scale**: ["4px","8px","12px","16px","24px","32px","48px","64px","96px"]

### Surfaces

- **Paper**: #0F0E0C
- **Panel**: #1B1916
- **Ink Splatter**: radial-gradient(circle at 18% 24%, rgba(156,144,129,.10) 1px, transparent 1.4px)

### Borders

- **Policy**: none-as-chrome
- **Focus Ring**: inset 0 0 0 2px #D8392B
- **Seal Bar**: inset 4px 0 0 #D8392B

### Motion

- **Fast**: 150ms cubic-bezier(0.2,0,0,1)
- **Flick**: 180ms cubic-bezier(0.2,0,0,1)
- **Spread**: 300ms cubic-bezier(0.4,0,0.2,1)
- **Reduced Motion**: respected

## Rules

### Composition

Asymmetric, off-centre-left, flowing rather than rigidly gridded; layouts follow cursive reading energy top-right to bottom-left. Oversized brush-stroke SVG anchors bleed behind content. Negative space is deliberate, like the breathing room in a scroll.

### Hierarchy

Dramatic size contrast. The wild-cursive display hand (Ma Shan Zheng) dominates headings, big numerals, and a table's leading cell like a bold first stroke; Noto Sans SC carries all reading. Vermillion marks the one primary action and active states; gold leaf marks secondary emphasis like a seal stamp.

### Density

Medium-high with generous vertical rhythm. Focal surfaces carry an organic dry-paper clip edge and a slight tilt (-0.6deg..0.6deg) for the handwritten feel. Spacing follows brush rhythm — tight within groups, generous between.

### Signature

1) Flying-white surfaces: organic clip-path edge + slight tilt on focal cards. 2) The seal, placed: a single inset 4px vermillion bar asymmetrically on active surfaces. 3) Gesture-flow anchors: oversized brush-stroke SVGs behind content. 4) Ink-splatter texture in large dark areas. 5) Dry-brush dividers — alternating-opacity bands, never flat rules.

## Layout

### Grid

asymmetric-fluid, off-centre-left, minmax(0,1fr) columns with min-width:0 children, max 1280px contained

### Whitespace

generous; section gap ~96px, component gap ~32px; always pad above titles

### Density

medium-high

### Responsive

single column on mobile; non-essential nav links and table columns hidden; only the full-bleed hero spans 100vw; contained content capped and centred on ultra-wide

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1200px
- **Ultrawide**: 2560px

## Guidance

### Do

- Keep the ground ink-dark (#0F0E0C) with a faint ink-splatter texture
- Use the organic clip-path edge and a slight tilt on focal surfaces
- Place the vermillion seal rarely and asymmetrically (left edge or bottom)
- Let oversized brush-stroke anchors bleed behind content, top-right to bottom-left
- Use Ma Shan Zheng at large scale for headings, numerals, and the table's leading cell
- Keep motion fast (150-200ms), gestural, ease-out; respect prefers-reduced-motion
- Hold extreme cream-on-ink contrast (~13:1)

### Don't

- Never centre layouts symmetrically
- Never use border-radius on primary containers
- Never use light or pastel grounds
- Never use pure white (#FFF) — the lightest value is the cream ink
- Never box the nav into a floating pill or trap chrome in a card
- Never put more than three accents in one view
- Never apply the calligraphic hand to body paragraphs
- Never use flat horizontal rule-lines — use the dry-brush band

### Accessibility

Cream #ECE6DA on #0F0E0C ground reaches ~13:1 (WCAG AAA). Body in Noto Sans SC at 17px for CJK and Latin readability. Interactive elements have a clear 2px vermillion focus ring. Motion respects prefers-reduced-motion; the fully-settled page renders with no JavaScript. Clip-path is decorative only — content stays in normal flow.

## Imagery Direction

### Pairs With

feibai-brushwork

### Summary

All imagery uses the Feibai Brushwork art style: forms built from a few sweeping single-gesture ink brushstrokes on dark handmade paper, dry-brush flying-white striations, a small vermillion seal-mark and flecks of gold leaf, asymmetric top-right to bottom-left energy.

### Subjects

- wild-cursive calligraphic gesture
- single explosive brush stroke
- ink-on-dark-paper abstraction
- feibai flying-white sweep

### Usage

Landing hero is a full-bleed feibai gesture with breathing negative space in the lower-left for the headline overlay; feature images reuse the hero stroke. Never illustrate the thumbnail — the thumbnail is an embodiment screenshot.

---
version: "alpha"
name: "Feihong"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  bg: "#0F0E0C"
  surface: "#1B1916"
  surface_2: "#23201C"
  text: "#ECE6DA"
  muted: "#9C9081"
  border: "#36312B"
  accent: "#D8392B"
  on_accent: "#FBF6EC"
  gold: "#C8A85E"
  ink_1: "#161410"
  ink_3: "#332E27"
  ink_4: "#4A4339"
  success: "#6FA06A"
  warning: "#C8A85E"
  error: "#D8392B"
  info: "#7C97A8"
typography:
  headline-lg:
    fontFamily: "Ma Shan Zheng"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.01em"
  headline-md:
    fontFamily: "Ma Shan Zheng"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.01em"
  body-md:
    fontFamily: "Noto Sans SC"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: "-0.01em"
  label-md:
    fontFamily: "Source Code Pro"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  soft: "16px"
  pill: "9999px"
  organic_clip: "0px"
spacing:
  base: "8px"
  xs: "4px"
  sm: "8px"
  md: "12px"
  lg: "16px"
  xl: "24px"
  2xl: "32px"
  3xl: "48px"
  4xl: "64px"
  step-8: "96px"
components:
  color-reference-bg:
    backgroundColor: "{colors.bg}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-surface_2:
    backgroundColor: "{colors.surface_2}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-on_accent:
    backgroundColor: "{colors.on_accent}"
  color-reference-gold:
    backgroundColor: "{colors.gold}"
  color-reference-ink_1:
    backgroundColor: "{colors.ink_1}"
  color-reference-ink_3:
    backgroundColor: "{colors.ink_3}"
  color-reference-ink_4:
    backgroundColor: "{colors.ink_4}"
  color-reference-success:
    backgroundColor: "{colors.success}"
  color-reference-warning:
    backgroundColor: "{colors.warning}"
  color-reference-error:
    backgroundColor: "{colors.error}"
  color-reference-info:
    backgroundColor: "{colors.info}"
  button-primary:
    backgroundColor: "{colors.accent}"
    textColor: "#ffffff"
    typography: "{typography.label-md}"
    rounded: "{rounded.none}"
    padding: "{spacing.md}"
  card-surface:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.none}"
    padding: "{spacing.md}"
  input-default:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.none}"
    height: "44px"
---

# Feihong

## Overview

Wild-cursive (kuangcao) calligraphy given to product surfaces. The page carries the gesture of brush meeting paper at speed — a single confident stroke that cannot be revised mid-flight. Ink-dark handmade-paper ground, cream ink that glows under lamplight, the vermillion seal pressed only where it counts. Calligraphy as performance, not careful penmanship.

### Values

- The single confident stroke over mechanical precision
- Deliberate asymmetry as compositional strength
- Ink-dark foundations that let cream content glow
- Dry-brush texture and organic imperfection as authenticity
- Speed and confidence in every interaction
- Compositional flow following cursive reading order (top-right to bottom-left)
- The vermillion seal reserved for moments that matter

### Anti-Values

- Sterile symmetry and rigid grid alignment
- Light or pastel grounds that lack gravitas
- Rounded friendly rectangles that soften the gesture
- Slow cautious motion that kills momentum
- Borders and accent edges used as chrome

### Visual Character

- background:#0F0E0C; color:#ECE6DA; font-family:'Ma Shan Zheng',serif
- clip-path:polygon(0 2%,99% 0,100% 98%,1% 100%); transform:rotate(-0.6deg)
- box-shadow:0 14px 40px rgba(0,0,0,.55), inset 0 0 60px rgba(0,0,0,.5)
- primary action carries box-shadow:5px 5px 0 rgba(216,57,43,.30)
- background-image:radial-gradient(circle at 18% 24%, rgba(156,144,129,.10) 1px, transparent 1.4px)

## Colors

Use the YAML color tokens as the normative palette. The prose below names the roles agents should preserve when generating UI.

| Token | Value |
|-------|-------|
| bg | `#0F0E0C` |
| surface | `#1B1916` |
| surface_2 | `#23201C` |
| text | `#ECE6DA` |
| muted | `#9C9081` |
| border | `#36312B` |
| accent | `#D8392B` |
| on_accent | `#FBF6EC` |
| gold | `#C8A85E` |
| ink_1 | `#161410` |
| ink_3 | `#332E27` |
| ink_4 | `#4A4339` |
| success | `#6FA06A` |
| warning | `#C8A85E` |
| error | `#D8392B` |
| info | `#7C97A8` |

## Typography

- **Headline-Lg**: Ma Shan Zheng, 2.075rem, weight 700, line-height 1.1.
- **Headline-Md**: Ma Shan Zheng, 1.66rem, weight 600, line-height 1.15.
- **Body-Md**: Noto Sans SC, 17px, weight 400, line-height 1.5.
- **Label-Md**: Source Code Pro, 0.75rem, weight 600, line-height 1.

## Layout

### Spacing Tokens

- **Base**: `8px`
- **Xs**: `4px`
- **Sm**: `8px`
- **Md**: `12px`
- **Lg**: `16px`
- **Xl**: `24px`
- **2xl**: `32px`
- **3xl**: `48px`
- **4xl**: `64px`
- **Step-8**: `96px`

### Grid

asymmetric-fluid, off-centre-left, minmax(0,1fr) columns with min-width:0 children, max 1280px contained

### Whitespace

generous; section gap ~96px, component gap ~32px; always pad above titles

### Density

medium-high

### Responsive

single column on mobile; non-essential nav links and table columns hidden; only the full-bleed hero spans 100vw; contained content capped and centred on ultra-wide

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1200px
- **Ultrawide**: 2560px

## Elevation & Depth

### Shadows

- **Sm**: 0 2px 10px rgba(0,0,0,.35)
- **Md**: 0 14px 40px rgba(0,0,0,.55)
- **Lg**: 0 28px 70px rgba(0,0,0,.66)
- **Seal**: 5px 5px 0 rgba(216,57,43,.30)
- **Inset Vignette**: inset 0 0 60px rgba(0,0,0,.5)

## Shapes

### Rounded

- **None**: `0px`
- **Soft**: `16px`
- **Pill**: `9999px`
- **Organic Clip**: `0px`

### Surfaces

- **Paper**: #0F0E0C
- **Panel**: #1B1916
- **Ink Splatter**: radial-gradient(circle at 18% 24%, rgba(156,144,129,.10) 1px, transparent 1.4px)

### Borders

- **Policy**: none-as-chrome
- **Focus Ring**: inset 0 0 0 2px #D8392B
- **Seal Bar**: inset 4px 0 0 #D8392B

## Components

### Composition

Asymmetric, off-centre-left, flowing rather than rigidly gridded; layouts follow cursive reading energy top-right to bottom-left. Oversized brush-stroke SVG anchors bleed behind content. Negative space is deliberate, like the breathing room in a scroll.

### Hierarchy

Dramatic size contrast. The wild-cursive display hand (Ma Shan Zheng) dominates headings, big numerals, and a table's leading cell like a bold first stroke; Noto Sans SC carries all reading. Vermillion marks the one primary action and active states; gold leaf marks secondary emphasis like a seal stamp.

### Density

Medium-high with generous vertical rhythm. Focal surfaces carry an organic dry-paper clip edge and a slight tilt (-0.6deg..0.6deg) for the handwritten feel. Spacing follows brush rhythm — tight within groups, generous between.

### Signature

1) Flying-white surfaces: organic clip-path edge + slight tilt on focal cards. 2) The seal, placed: a single inset 4px vermillion bar asymmetrically on active surfaces. 3) Gesture-flow anchors: oversized brush-stroke SVGs behind content. 4) Ink-splatter texture in large dark areas. 5) Dry-brush dividers — alternating-opacity bands, never flat rules.

## shadcn/ui Usage

When the target app uses shadcn/ui, copy DESIGN.md with shadcn instead of the plain DESIGN.md. It contains the same Katagami design-language source plus the shadcn/ui primitives, imports, theme variables, component recipes, and preview-shot guidance.

DESIGN.md with shadcn: `/language/en-019ef9b1-f2a1-7a90-9849-75a24147e19a/DESIGN.with-shadcn.md`.

The shadcn page also exposes optional machine-readable files for automation, but the human-facing handoff is DESIGN.md with shadcn.

Install recommended primitives with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

Use these primitives in shadcn apps:
- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Implementation rule for agents: import shadcn primitives from `@/components/ui/*`, apply the generated CSS variables first, then compose the language-specific recipes from the companion MD. Katagami remains the source of truth; shadcn names are the implementation surface.

## Do's and Don'ts

- Do Keep the ground ink-dark (#0F0E0C) with a faint ink-splatter texture
- Do Use the organic clip-path edge and a slight tilt on focal surfaces
- Do Place the vermillion seal rarely and asymmetrically (left edge or bottom)
- Do Let oversized brush-stroke anchors bleed behind content, top-right to bottom-left
- Do Use Ma Shan Zheng at large scale for headings, numerals, and the table's leading cell
- Do Keep motion fast (150-200ms), gestural, ease-out; respect prefers-reduced-motion
- Do Hold extreme cream-on-ink contrast (~13:1)
- Don't Never centre layouts symmetrically
- Don't Never use border-radius on primary containers
- Don't Never use light or pastel grounds
- Don't Never use pure white (#FFF) — the lightest value is the cream ink
- Don't Never box the nav into a floating pill or trap chrome in a card
- Don't Never put more than three accents in one view
- Don't Never apply the calligraphic hand to body paragraphs
- Don't Never use flat horizontal rule-lines — use the dry-brush band

### Accessibility

Cream #ECE6DA on #0F0E0C ground reaches ~13:1 (WCAG AAA). Body in Noto Sans SC at 17px for CJK and Latin readability. Interactive elements have a clear 2px vermillion focus ring. Motion respects prefers-reduced-motion; the fully-settled page renders with no JavaScript. Clip-path is decorative only — content stays in normal flow.

## Imagery Direction

### Pairs With

feibai-brushwork

### Summary

All imagery uses the Feibai Brushwork art style: forms built from a few sweeping single-gesture ink brushstrokes on dark handmade paper, dry-brush flying-white striations, a small vermillion seal-mark and flecks of gold leaf, asymmetric top-right to bottom-left energy.

### Subjects

- wild-cursive calligraphic gesture
- single explosive brush stroke
- ink-on-dark-paper abstraction
- feibai flying-white sweep

### Usage

Landing hero is a full-bleed feibai gesture with breathing negative space in the lower-left for the headline overlay; feature images reuse the hero stroke. Never illustrate the thumbnail — the thumbnail is an embodiment screenshot.

```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "feihong",
  "type": "registry:theme",
  "title": "Feihong shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#0F0E0C",
      "foreground": "#ECE6DA",
      "card": "#1B1916",
      "card-foreground": "#ECE6DA",
      "popover": "#1B1916",
      "popover-foreground": "#ECE6DA",
      "primary": "#ECE6DA",
      "primary-foreground": "#111111",
      "secondary": "#f4f4f5",
      "secondary-foreground": "#111111",
      "muted": "#9C9081",
      "muted-foreground": "#ECE6DA",
      "accent": "#D8392B",
      "accent-foreground": "#ffffff",
      "destructive": "#D8392B",
      "border": "#36312B",
      "input": "#36312B",
      "ring": "#D8392B",
      "chart-1": "#ECE6DA",
      "chart-2": "#f4f4f5",
      "chart-3": "#D8392B",
      "chart-4": "#6FA06A",
      "chart-5": "#C8A85E",
      "sidebar": "#1B1916",
      "sidebar-foreground": "#ECE6DA",
      "sidebar-primary": "#ECE6DA",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#7C97A8",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#36312B",
      "sidebar-ring": "#D8392B",
      "radius": "0.625rem"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#ECE6DA",
      "primary-foreground": "#111111",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#D8392B",
      "accent-foreground": "#ffffff",
      "destructive": "#D8392B",
      "border": "#303642",
      "input": "#303642",
      "ring": "#D8392B",
      "chart-1": "#ECE6DA",
      "chart-2": "#f4f4f5",
      "chart-3": "#D8392B",
      "chart-4": "#6FA06A",
      "chart-5": "#C8A85E",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#ECE6DA",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#D8392B",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#D8392B",
      "radius": "0.625rem"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ef9b1-f2a1-7a90-9849-75a24147e19a",
    "slug": "feihong",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "colors": [
        "accent",
        "bg",
        "border",
        "error",
        "gold",
        "info",
        "ink_1",
        "ink_3",
        "ink_4",
        "muted",
        "on_accent",
        "success",
        "surface",
        "surface_2",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "heading_transform",
        "heading_weight",
        "letter_spacing",
        "mono_font"
      ],
      "radii": [
        "none",
        "organic_clip",
        "pill",
        "soft"
      ],
      "shadows": [
        "inset_vignette",
        "lg",
        "md",
        "seal",
        "sm"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "ink_splatter",
        "panel",
        "paper"
      ],
      "borders": [
        "focus_ring",
        "policy",
        "seal_bar"
      ],
      "motion": [
        "fast",
        "flick",
        "reduced_motion",
        "spread"
      ]
    }
  }
}
```