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workbuddy_skills/open-design/design-systems/duolingo/DESIGN.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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Design System Inspired by Duolingo

Category: Productivity & SaaS Language-learning platform. Bright owl green, chunky shadows, gamified joy.

1. Visual Theme & Atmosphere

Duolingo is gamification rendered as visual language. The interface is unapologetically bright, with owl green (#58cc02) as the brand primary and a chunky 4px bottom-shadow on every interactive element that reads like a 3D button waiting to be pressed. The page is white (#ffffff) with thick 2–3px borders in a deep gray (#e5e5e5) and the entire system reads like an iOS app from 2015 reborn with better hierarchy.

Typography uses Feather Bold (a custom rounded sans) for chrome and Mona Sans (or Inter) for body. Display sizes are big and confident — Duolingo never whispers. Headings often carry the green underline-stroke or sit on a green pill, and the mascot Duo (a green owl) appears as an active illustration character, not a static logo.

Shape language is friendly: 16–20px radii on cards, 12px on buttons, 9999px on chips and progress bars. Iconography is filled, rounded, and color-coded by skill — every lesson surface has an instantly identifiable color pairing.

Key Characteristics:

  • Owl green (#58cc02) as the dominant brand color, used in 30%+ of the surface
  • Chunky 4px bottom-shadow on every button (the "tactile press" affordance)
  • 2–3px solid borders, never hairlines
  • Feather Bold (rounded display) + Mona Sans (body)
  • Big confident type — display sizes start at 48px and climb
  • Mascot-as-character: Duo the owl appears in onboarding, errors, streaks
  • Streak orange (#ff9600) and gem pink (#ce82ff) as secondary brand colors

2. Color Palette & Roles

Primary

  • Owl Green (#58cc02): Brand primary, primary CTA, correct answer.
  • Owl Green Deep (#58a700): Pressed/shadow color for green buttons.
  • Owl Green Light (#89e219): Hover, soft fills.
  • Owl Green Pale (#dbf8c5): Soft surface, success banner.

Secondary Accents

  • Streak Orange (#ff9600): Streak counter, fire icon, premium energy.
  • Streak Orange Deep (#cc7a00): Pressed orange.
  • Gem Pink (#ce82ff): Gem currency, Super Duolingo.
  • Eel Blue (#1cb0f6): Hint button, info link.
  • Cardinal Red (#ff4b4b): Wrong answer, life lost.
  • Bee Yellow (#ffc800): Pro badge, achievement.

Surface

  • Snow (#ffffff): Primary background.
  • Eel (#f7f7f7): Section break, secondary surface.
  • Swan (#e5e5e5): Disabled background, inset block.
  • Wolf (#777777): Dark divider, secondary text.

Ink & Text

  • Eel Black (#3c3c3c): Primary text.
  • Wolf (#777777): Secondary text, captions.
  • Hare (#afafaf): Disabled, placeholder.

Border

  • Swan (#e5e5e5): Standard 2px border.
  • Hare (#afafaf): Emphasized border on hover.

3. Typography Rules

Font Family

  • Display / UI / Headings: Feather Bold, with fallback: 'DIN Round Pro', 'Helvetica Neue', sans-serif
  • Body / Long-form: Mona Sans, with fallback: 'Helvetica Neue', system-ui, sans-serif
  • Code (rare, schools/admin): JetBrains Mono, with fallback: ui-monospace, Menlo, monospace

Hierarchy

Role Font Size Weight Line Height Letter Spacing Notes
Display Feather Bold 56px (3.5rem) 800 1.05 -0.01em Onboarding hero
H1 Feather Bold 32px (2rem) 800 1.15 -0.005em Page title
H2 Feather Bold 24px (1.5rem) 800 1.2 normal Section heading
H3 Feather Bold 18px (1.125rem) 700 1.25 normal Card title, lesson row
Body Large Mona Sans 17px (1.0625rem) 500 1.5 normal Lesson prompt, instruction
Body Mona Sans 15px (0.9375rem) 400 1.5 normal Standard prose
Caption Mona Sans 13px (0.8125rem) 600 1.4 0.01em XP counter, metadata
Button Feather Bold 16px (1rem) 800 1.2 0.02em Standard button label
Streak Feather Bold 14px (0.875rem) 800 1.2 normal Streak number, on flame

Principles

  • 800 is default: Feather Bold runs at 800 across headings and buttons. 700 feels weak in this system.
  • Big type: heading sizes are 25–40% larger than typical product brands — confidence as identity.
  • Rounded letterforms: every glyph has soft terminals; sharp serifs would break the friendliness contract.

4. Component Stylings

Buttons

Primary (Owl Green)

  • Background: #58cc02
  • Text: #ffffff
  • Padding: 14px 24px
  • Radius: 16px
  • Border-bottom: 4px solid #58a700 (the chunky shadow)
  • Hover: background #89e219
  • Active: translate-y 4px, border-bottom 0 (button "presses")
  • Use: "Continue", "Check", main CTA.

Secondary (White with Bottom-Shadow)

  • Background: #ffffff
  • Text: #777777
  • Border: 2px solid #e5e5e5
  • Border-bottom: 4px solid #e5e5e5
  • Radius: 16px
  • Padding: 14px 24px
  • Hover: text #3c3c3c, border #afafaf

Streak Orange

  • Background: #ff9600
  • Text: #ffffff
  • Border-bottom: 4px solid #cc7a00
  • Use: streak goal, "Start streak"

Error (Cardinal Red)

  • Background: #ff4b4b
  • Text: #ffffff
  • Border-bottom: 4px solid #cc3b3b
  • Use: wrong answer feedback.

Cards / Lesson Tiles

  • Background: #ffffff
  • Border: 2px solid #e5e5e5
  • Border-bottom: 4px solid #e5e5e5
  • Radius: 16px
  • Padding: 16px
  • Hover: lift 2px, shadow 0 4px 0 #d7d7d7

Skill Tree Node (Lesson Bubble)

  • Size: 80×72px
  • Background: skill-color tinted (green for active, gray for locked)
  • Border-bottom: 6px solid darker variant
  • Radius: 50% (circular)
  • Active: pulses 1.0 → 1.05 every 1.6s

Inputs

  • Background: #ffffff
  • Border: 2px solid #e5e5e5
  • Radius: 12px
  • Padding: 12px 16px
  • Focus: border #1cb0f6 (eel blue), ring 0 0 0 3px rgba(28, 176, 246, 0.2)

Progress Bar

  • Track: #e5e5e5
  • Fill: #58cc02 (or #ff9600 for streak)
  • Radius: 9999px
  • Height: 16px
  • Animated fill: 320ms ease-out on increment.

5. Spacing & Layout

  • Base unit: 4px. Scale: 4, 8, 12, 16, 24, 32, 48, 64.
  • Container: max 1080px, 24px gutter.
  • Lesson tree column: 320px wide; centered on desktop.

6. Motion

  • Duration: 180ms for button press; 320ms for skill-node unlock; 1.6s for active-node pulse.
  • Easing: cubic-bezier(0.34, 1.56, 0.64, 1) (back-out, slight overshoot) for unlocks.
  • Mascot: Duo blinks every 4–6s, jumps on streak milestones (480ms ease-out spring).

7. Usage Guardrails

  • Keep the high-saturation owl green, chunky bottom shadows, and rounded lesson geometry together; flat green buttons alone do not read as Duolingo.
  • Reserve oversized bold type for lesson, streak, and progress moments where the product needs encouragement or feedback.
  • Use playful motion sparingly around progress state changes, avoiding generic bouncy animation on every control.
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