# #4 Direction e53aea10

> light · 322° · Hanken Grotesk / Atkinson Hyperlegible · 9 col

| | |
|---|---|
| hash / ref | `e53aea1015641f05538eb15f105881456fef8688c32ff5b23718bea54346ef5b` |
| algorithm / library | hash-design/v2 / `bd20321c36ab` |
| constraints | none |

**This brief is a frozen spec, not a mood board.** Every value comes from the hash: do not swap fonts, colours, the grid or the numbers for ones you prefer. Global bans override everything; if the twist cannot apply literally, apply the nearest literal reading and say so in an HTML comment.

## 映射过程 Mapping trace

| bytes | hex | parameter | rule | → result |
|---|---|---|---|---|
| 0+1 | `e5 3a` | hue | 0xe53a = 58682; 58682/65536 × 360 | **322.35°** |
| 2 | `ea` | polarity · paper lightness | 234 ≥ 77 → light; L = 0.90 + 157/178 × 0.085 | **light, L 0.975** |
| 3 | `10` | paper chroma | 16/255 × 0.045 | **0.003** |
| 4 | `15` | accent chroma | 0.07 + 21/255 × 0.16 | **0.083** |
| 5 | `64` | accent2 hue offset | 30 + 100/255 × 300 | **+147.65°** |
| 6 | `1f` | display face | 31 mod 98 = 31 | **Hanken Grotesk** |
| 7 | `05` | body face | 5 mod 62 = 5 | **Atkinson Hyperlegible** |
| 8 | `53` | display case · weight | 83 mod 4 = 3; ⌊83/4⌋ mod 3 | **small-caps, 500** |
| 9 | `8e` | display tracking | −0.04 + 142/255 × 0.24 | **0.094em** |
| 10 | `b1` | type scale ratio | 1.067 + 177/255 × 0.551 | **1.449** |
| 11 | `5f` | density | t = 95/255 | **t 0.373: base 16.5px, line-height 1.54, unit 8px** |
| 12 | `10` | grid columns · gutter | 3 + 16 mod 10; unit × (1 + ⌊16/10⌋ mod 4) | **9 columns, 16px gutter** |
| 13 | `58` | text block span · start | span 8/15, start 5/15 | **columns 2–7 of 9** |
| 14 | `81` | first-screen height | 45 + 129/255 × 55 | **73%** |
| 15 | `45` | sections · separator | 3 + 69 mod 6; ⌊69/6⌋ mod 5 | **6 sections, bands** |
| 16 | `6f` | anchor subject · size | 111 mod 8; 25 + ⌊111/8⌋/31 × 75 | **motif, 56%** |
| 17 | `ef` | anchor position · rotation | x 15/15; ((14) − 7.5)/7.5 × 8 | **x 1, 7°** |
| 18 | `86` | motif shape · size | 134 mod 12; unit × (1 + ⌊134/12⌋ mod 8) | **rings, 32px** |
| 19 | `88` | motif placement · angle | 136 mod 4; ⌊136/4⌋ × 180/63 | **edges, 97°** |
| 20 | `c3` | radius · border | RADII[195 mod 8]; ⌊195/8⌋ mod 4; ⌊195/32⌋ mod 4 | **0px radius, 0px dashed border** |
| 21 | `2f` | shadow · texture | 47 & 3; (47 >> 2) & 3; 3 + 2 × 0.6 | **6px hard shadow, dot-screen 4.2%** |
| 22 | `f5` | motion property · duration | ⌊245/64⌋; (245 mod 64)/63 × 600 | **colour, 500ms** |
| 23 | `b2` | easing | 178 ≥ 32 → cubic-bezier from bits | **cubic-bezier(0.51, 1, 0.63, 1)** |
| 24 | `37` | voice person · headline form | 55 mod 4; ⌊55/4⌋ mod 6 | **none, question** |
| 25 | `18` | sentence length · register | 3 + (24 & 15); (24 >> 4)/15 | **11 words, register 0.07** |
| 26 | `be` | twist target | 190 mod 9 | **navigation** |
| 27 | `a5` | twist operation · amount | 165 mod 10; ⌊165/10⌋ | **repeat, 16** |
| 29 | `46` | CJK display face | 70 mod 14 _(used on Chinese pages)_ | **Chiron Hei HK** |
| 30 | `ef` | mono face | 239 mod 8 | **Share Tech Mono** |
| 28, 31 | `43 5b` | (unused) | recorded, not used | — |

## 内容 Content

**Subject:** Causeway — a music festival on Skerrow Island

Use only these facts. Do not invent numbers, reviews, awards or customers; leave gaps visibly empty.

- Name: Causeway — a one-day music festival on Skerrow Island
- Date: Saturday 19 June 2027
- The island is reached on foot over a 1.2 km tidal causeway
- Causeway open for arrivals 09:40–13:10 and for departures 22:15–01:30 (that day's tide times)
- Nobody crosses outside those windows; the harbour boat is for emergencies only
- Capacity: 900 people
- Tickets: £54 adult, £27 for ages 12–17, free under 12; on sale 1 March 2027
- Two stages: the Boathouse (indoors, 220 people) and the Field (outdoors)
- Field line-up: The Lantern Choir, Mara Quist, Seven Herons, Low Orbit Brass
- Boathouse line-up: Ada Fenwick (solo cello), Tomasz & the Weir, Kelp, Ruth Ono Trio
- The last set ends at 21:45 so everyone reaches the causeway in time
- No single-use plastic on the island: bring a cup, or buy an enamel one for £6
- Food from two island kitchens; cash and card
- Organised by the Skerrow Island Trust, a volunteer charity; profits go to repairing the sea wall
- Fourth year of the festival, first held in 2024
- Wear boots: parts of the causeway are wet sand and seaweed

## 文案语气 Voice

- **Person:** impersonal: no pronouns, facts stated plainly
- **Headlines:** a question the facts answer
- **Sentences:** about 11 words on average (about 22 characters in Chinese)
- **Register:** 0.07 on a 0–1 scale — spoken and casual

## 版式 Layout

- **Grid:** 9 columns, 16px gutters, max width 1210px
- **Text block:** columns 2–7 of 9 (left of centre)
- **First screen:** 73% of the viewport height
- **Sections:** 6, separated by full-width bands alternating paper and panel
- Below 640px wide the grid collapses to one column; separators and the anchor stay.

**First-screen anchor:** the motif drawn at full scale; about 56% of the first screen's width, centred at 100% from the left edge, rotated 7°.

## 字体 Typography

- **Display**: Hanken Grotesk 300/400/500 + italic · set at 500, small caps (font-variant-caps: all-small-caps), letter-spacing 0.094em — fallback `"Helvetica Neue", Arial, sans-serif`
- **Body**: Atkinson Hyperlegible 400/700 + italic — fallback `Verdana, Arial, sans-serif`
- **Mono**: Share Tech Mono 400 — fallback `"Courier New", monospace`
- **CJK** (Chinese pages): display Chiron Hei HK, body Noto Sans SC

Scale: ratio **1.449** on a 16.5px base → -2: 7.9px · -1: 11.4px · 0: 16.5px · 1: 23.9px · 2: 34.6px · 3: 50.2px · 4: 72.7px · 5: 105.4px · 6: 152.7px · 7: 221.3px

```html
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=Atkinson+Hyperlegible:ital,wght@0,400;0,700;1,400;1,700&family=Share+Tech+Mono&display=swap">
```

## 配色 Colour — light, hue 322.35°

Computed in OKLCH: paper L 0.975 / C 0.003 at hue 322.35°; accents at chroma 0.083, accent2 147.65° round the wheel. Text lightness is solved for contrast (ink ≥ 7.5:1, muted ≥ 4.6:1, accents ≥ 3:1 on paper).

| token | hex | role |
|---|---|---|
| paper | `#f8f6f8` | page background |
| ink | `#3c353d` | primary text |
| muted | `#766c77` | secondary text |
| accent | `#a47baa` | the anchor and one kind of mark |
| accent2 | `#90925c` | sparingly, under a tenth of the page |
| rule | `#c3bdc4` | lines, borders |
| panel | `#ebe5ec` | secondary background |

Contrast (WCAG):

- ink on paper: **11.04:1** — AAA — any text
- muted on paper: **4.67:1** — AA — body text OK
- ink on panel: **9.58:1** — AAA — any text
- accent on paper: **3.26:1** — large text / UI marks only (≥24px or bold ≥19px)
- accent2 on paper: **3.03:1** — large text / UI marks only (≥24px or bold ≥19px)
- #000000 on accent: **5.99:1** — AA — body text OK
- #000000 on accent2: **6.45:1** — AA — body text OK

## 密度 Density — 0.373

0.373 on the density axis (0 = airiest, 1 = most packed): base 16.5px, line-height 1.54, spacing unit 8px, section gap 117px, max width 1210px.

## 形状与材质 Shape & surface

- **Radius:** 0 — square corners everywhere
- **Borders:** none; use the separators and space
- **Shadow:** hard offset 6px 6px in ink, no blur (never a soft, blurred shadow)
- **Texture:** a fine dot screen (radial-gradient pattern) at 4.2% opacity

```css
body { background-image: radial-gradient(color-mix(in srgb, var(--ink) 4.2%, transparent) 1px, transparent 1.5px); background-size: 6px 6px; }
```

## 母题 Motif

Concentric circles, each about 32px, along the page edges, at 97°. Draw them with CSS or inline SVG in the palette colours; no icon fonts, no emoji.

## 动效 Motion

Colour (color / background-color) changes over 500ms with `cubic-bezier(0.51, 1, 0.63, 1)`, on hover, focus and state changes, plus the anchor once on load. Never animate every section on scroll. Under prefers-reduced-motion nothing moves.

## 变数 Twist

Repeat the navigation 2 times in a row.

## 全局禁令 Global bans

- **禁用 Inter 及同类默认无衬线** (generic-sans, critical): 不得使用 Inter / Inter Tight / Inter Display / Roboto / Roboto Flex / Open Sans / Lato / Poppins / Montserrat / Nunito / Nunito Sans / Plus Jakarta Sans / Manrope / DM Sans / Outfit / Figtree / Geist / Urbanist / Sora / Lexend / Raleway / Work Sans / Space Grotesk，也不得只写 system-ui / sans-serif 当作"设计选择"。字体必须来自 brief 指定的字体对。
- **禁用紫蓝渐变** (purple-blue-gradient, critical): 禁止紫/靛/蓝系渐变背景、渐变文字（background-clip:text）、模糊彩色光斑（mesh blob / glow orb）。需要渐变时只能用 brief 调色板内的颜色，且必须有材质理由（如油墨叠印、日晒褪色）。
- **禁用居中 hero + 双按钮** (centered-hero-two-buttons, critical): 禁止"居中大标题 + 一行副标题 + 主按钮/幽灵按钮并排"的首屏。首屏结构必须来自 brief 的 layout 与 anchor。
- **禁用三张同款卡片** (identical-cards, major): 禁止 3/4/6 张结构相同的"图标 + 标题 + 两行说明"卡片排成一行。信息分组要用 brief 指定的版式手段（表格、清单、编号条款、价签、标签……），且各项尺寸/权重应有差异。
- **禁用玻璃态** (glassmorphism, major): 禁止 backdrop-filter 毛玻璃、半透明白卡片叠在彩色背景上。
- **禁用 emoji 当图标** (emoji-icons, major): 禁止用 emoji（✨🚀⚡️🎯 等）充当图标、项目符号或装饰；也不要拿通用图标库（Heroicons/Lucide/Feather）当装饰。需要图形时用 brief 母题自绘 SVG 或纯排版符号。
- **禁用空洞营销文案** (buzzword-copy, major): 禁止 unlock / unleash / seamless / seamlessly / supercharge / elevate / empower / revolutionize / revolutionary / effortless 等英文空话，以及 赋能 / 无缝 / 一站式 / 极致体验 / 颠覆 / 引领未来 / 全方位 / 助力 等中文空话。文案只能由用户提供的事实构成，按 brief 的 voice 写。
- **禁用"圆角 + 柔和大阴影"一切** (soft-shadow-rounded, major): 禁止所有块都是 12–24px 圆角加 0 10px 30px 级别的柔和投影。圆角与阴影只能按 brief tokens 使用（--radius、--shadow：硬投影或不用，绝不模糊）。
- **禁止编造事实与社会证明** (invented-facts, critical): 禁止虚构数据条（"10K+ 用户 / 99.9% 可用"）、"Trusted by" logo 墙、带头像的假评价、假奖项。只用 facts 中给出的信息；缺信息就留空位或写明待补。
- **禁用框架默认色板** (tailwind-default-palette, major): 禁止直接用 Tailwind slate/indigo/violet/sky 默认色值（如 #6366f1、#8b5cf6、#0f172a、#3b82f6），禁止"深海军蓝底 + 霓虹强调色"的开发者工具外观（除非 brief 明确如此）。颜色只能来自 brief 调色板。
- **禁用"每段都淡入上浮"** (scroll-fade-everything, minor): 禁止给每个区块都加滚动淡入上浮（AOS / data-aos / IntersectionObserver fade-up）。动效只能按 brief motion 规格，且必须尊重 prefers-reduced-motion。
- **禁用标题上方的胶囊徽标** (pill-badge-sparkle, minor): 禁止在大标题上方放 "New ✨ / Now in beta →" 一类圆角胶囊小标签。
- **禁用占位内容** (placeholder-content, major): 禁止 Lorem ipsum、"Feature One"、通用图库人物照、随机 Unsplash 图。没有真实图片时，用排版、色块、自绘 SVG 或 brief 母题代替。
- **禁用 SaaS 模板分节** (template-sections, minor): 禁止 Hero → Features → Testimonials → Pricing → FAQ → CTA 的固定套路。分节顺序来自 brief layout 的 structure，内容按事实组织。

## tokens.css

```css
/* hash-design hash-design/v2 · e53aea10 */
:root {
  --paper: #f8f6f8;
  --ink: #3c353d;
  --muted: #766c77;
  --accent: #a47baa;
  --on-accent: #000000;
  --accent2: #90925c;
  --on-accent2: #000000;
  --rule: #c3bdc4;
  --panel: #ebe5ec;

  --font-display: "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Atkinson Hyperlegible", Verdana, Arial, sans-serif;
  --font-mono: "Share Tech Mono", "Courier New", monospace;
  --display-weight: 500;
  --display-tracking: 0.094em;

  --step-n2: 0.491rem; /* 7.9px */
  --step-n1: 0.712rem; /* 11.4px */
  --step-0: 1.031rem; /* 16.5px */
  --step-1: 1.494rem; /* 23.9px */
  --step-2: 2.165rem; /* 34.6px */
  --step-3: 3.137rem; /* 50.2px */
  --step-4: 4.546rem; /* 72.7px */
  --step-5: 6.587rem; /* 105.4px */
  --step-6: 9.545rem; /* 152.7px */
  --step-7: 13.831rem; /* 221.3px */
  --leading: 1.54;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  --section-gap: 117px;
  --max-width: 1210px;
  --columns: 9;
  --gutter: 16px;

  --radius: 0px;
  --border: 0px dashed var(--rule);
  --shadow: 6px 6px 0 var(--ink);

  --motion-duration: 500ms;
  --motion-easing: cubic-bezier(0.51, 1, 0.63, 1);
}

html { font-size: 103.1%; }
body { background: var(--paper); color: var(--ink); font-family: var(--font-body); line-height: var(--leading); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
```

## 交付前自检 Before you ship

- [ ] Fonts on the page are exactly: Hanken Grotesk / Atkinson Hyperlegible / Share Tech Mono
- [ ] Every colour on the page comes from the 7 palette tokens above
- [ ] 9-column grid, text block in columns 2–7 of 9 (left of centre), first screen built around the motif drawn at full scale
- [ ] Copy uses impersonal: no pronouns, facts stated plainly, headlines are a question the facts answer, only the facts
- [ ] Radius 0px, hard 6px shadow, dot-screen texture
- [ ] Twist applied: Repeat the navigation 2 times in a row.
- [ ] `critique_page` (or `hash-design critique --brief e53aea1015641f05538eb15f105881456fef8688c32ff5b23718bea54346ef5b`) reports no critical/major findings