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workbuddy_skills/open-design/craft/typography.md
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admin 5afeb6b78a ④段整套同步(六节 + P/S/F/J + 模板)+ open-design 移到技能根
一、④段整套同步(用户选候选 A)
- 新增 `references/stage-proto-doc/assets/产品文档模板.html`(16 KB/247 行,从备份拷、转 LF)。
- ④段 SKILL.md 换成备份 15:28 那版,并按模板口径改齐:
  · 「产品文档框架」从「四块+一附录」改成**六节** —— 页面结构/功能清单/使用场景/操作流程/
    跨页与界面状态/待确认与偏离;与模板同构,⛔ 不从空白页重写结构。
  · 编号从 R/S/F 改成 **P 页面/S 场景/F 功能/J 二级功能**,各自唯一、按展示顺序通排。
  · 保留旧版有价值的要求:每项功能补齐 做什么/入口在哪/输入边界/异常与恢复;重点功能三处标红;
    横向流程图每步写清页面/功能/操作/完成判据。
  · 完成标准「七节」→「六节」,自查清单同步换掉「需求」那批条目,补模板与配图两条。
  · 路径 `designs/<项目>/` → `docs/pm/<项目>/ui/`(2 处)。
  · 补回本机那条「每份产出文档开头都要有一张图」的引用(指向主 skill,段内不复述)。
- 主 skill 同步:四段结构表④行、④段沿革、画图小节(④段画页面结构图 + 用户路径)。

二、open-design 移到技能根(用户选候选 A)
- `git mv product-planning/references/stage-delivery/assets/open-design → open-design/`(4178 文件)。
- `.gitignore` 白名单加 `!/open-design/` —— 否则移出去就不再纳入版本控制。
- 引用改 11 处:路径形态 `assets/open-design/...` → `<技能根>/open-design/...`;
  「随段携带的自带件」改称「同根技能」;「路径怎么找」那条改成自带件(段内相对路径)与
  同根技能(`<技能根>/<技能名>/`)两类分开写。
- open-design 自己的 ATTRIBUTION.md 两处同步(它现在与 oil-ui-pro 同层)。
- 副作用(有益):命名闸门读数由 2063 降到 225 —— 此前它把 open-design 里 919 个第三方 md
  当成规则一起扫了;现在只扫本包 23 个 md。已确认④段的 H1 与 4a/4b/4c 子步仍在检查范围内。

三、验收
- check_naming.py --ws E:/ProgramData/AIProject/contentm_agent = 通过 225 / 失败 0 / 提示 27。
- 活文件里 `assets/open-design` 残留 0;工作区 CRLF 文件 0。
2026-10-15 21:17:28 +08:00

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Typography craft rules

Universal typography rules that apply on top of any DESIGN.md. The active design system decides which fonts; this file decides how they behave at every size.

Adapted from refero_skill (MIT) — distilled and re-tuned for OpenDesign's token system.

Type scale

Use a multiplicative scale (1.2 or 1.25). Cap at 6–8 sizes per artifact.

Role Range
Display 48–72 px
H1 32–48 px
H2 24–32 px
H3 20–24 px
Body 15–18 px
Small 13–14 px
Caption 11–12 px

Line height (leading)

Text size Line height
Display / H1 (≥32 px) 1.0–1.2 (tight)
Body (15–18 px) 1.5–1.6
Small (≤14 px) 1.5

CJK overrides — these are not optional

The table above is Latin leading. Latin display type can go to 1.0 because the ascender/descender slack inside the em box keeps lines apart. CJK glyphs fill the em box, so the same value makes consecutive lines touch, and multi-line Chinese headlines visibly collide.

Text size Latin CJK
Display / H1 (≥32 px) 1.0–1.2 1.3–1.4
Body (15–18 px) 1.5–1.6 1.7–1.8

The CJK floor has no upper size tier. It applies to every heading level, including the cover / hero main title — the single biggest headline on a deck's first slide. A Chinese cover title at 72 px, 96 px, or larger, especially one split into multiple lines with <br>, is still CJK display text: set line-height: 1.3–1.4 on it, never the Latin 1.0–1.2. At 96 px a 1.05 leading makes the two lines of a Chinese cover headline visibly collide. This is the single most common violation, so check the cover main title first.

Negative tracking is Latin-only for the same reason: CJK is already set on a fixed em grid, so -0.02em on a Chinese headline crowds the glyphs instead of tightening the word. Use 0 for CJK display text.

When one artifact mixes both — an English kicker over a Chinese headline is the common case — set the tight Latin values on the Latin element only. Do not inherit them onto the CJK block from a shared parent rule.

Letter-spacing — the rule that makes or breaks craft

This is the single most-skipped rule in AI-generated design. No exceptions.

Context Letter-spacing
Body text (14–18 px) 0 (default)
Small text (11–13 px) 0.01em to 0.02em (positive)
UI labels and button text 0.02em
ALL CAPS 0.06em to 0.1em (required)
Headings 32 px+ -0.01em to -0.02em
Display 48 px+ -0.02em to -0.03em

ALL CAPS without positive tracking looks cramped and amateur. Display text without negative tracking looks loose and weak. These two failures are the most reliable AI-slop tells.

The 0.06em floor is not arbitrary: it is the empirical lower bound that print and web typographers have converged on for uppercase tracking (cf. Bringhurst's Elements of Typographic Style §3.2.7, which recommends 5–10% of the em for caps; modern screen practice rounds the lower end to 0.06em). Anything tighter and the counters collide on screen; the upper bound 0.1em keeps the word from disintegrating into letters.

Font pairing

  • Maximum 2 typefaces per artifact (display + body, or one variable face used at multiple weights).
  • Always declare a system fallback chain. If the active DESIGN.md ships a webfont URL, the fallback must still produce a coherent look.
  • Never set font-family: system-ui alone on a heading — that is the textbook AI default; always pair it with an intentional first choice.

Line length

Limit body copy to 50–75 characters per line. In CSS: max-width: 65ch is a safe default.

Three-weight system

Most well-crafted UIs use exactly 3 weights:

  • Read (400 / 450) — body copy
  • Emphasize (510 / 550) — UI text, labels, navigation
  • Announce (590 / 600) — headlines, buttons

Weight 700+ is rarely needed. If your design uses bold for "emphasis on emphasis," it likely lacks weight discipline elsewhere.

Common mistakes (lint these)

  • ALL CAPS without letter-spacing ≥ 0.06em.
  • Display text (≥32 px) without negative tracking (Latin only — see the CJK overrides).
  • CJK display text at Latin leading (≤1.2), which makes the lines overlap.
  • Multi-line CJK cover / hero titles (72–96 px+, e.g. split with <br>) below 1.3 line-height.
  • Negative tracking applied to CJK text.
  • More than 3 type sizes visible above the fold.
  • Mixed serif and slab on the same screen without a clear role split.
  • Body copy in text-align: justify (creates rivers; never use on the web).