diff --git a/apps/design-lab/README.md b/apps/design-lab/README.md
new file mode 100644
index 0000000..06047c7
--- /dev/null
+++ b/apps/design-lab/README.md
@@ -0,0 +1,26 @@
+# design-lab · 设计系统可运行版
+
+孟菲斯 × 拟物卡设计系统的 Vite MPA 实现。设计规格文档见 `design-refs/mockup/design-system/`（四册 PDF）。
+
+## 结构
+
+- 根目录每个 `*.html` 是一个入口，对应 `src/pages/<name>/main.tsx`（vite.config 自动扫描）
+- `src/styles/tokens.css`：Tailwind v4 `@theme` 设计 token（撞色对 / 中性阶 / 章节色）
+- `src/components/`：MemphisCard、RouteLine、Ticket、shapes、EntryGuide
+- `src/lib/chapters.ts`：章节/关系/画像数据（改内容只动这里）
+
+## 命令
+
+```bash
+yarn dev                # 本地开发
+yarn build              # 构建 MPA
+yarn test:e2e           # E2E：结构契约断言 + 视觉基线
+yarn test:e2e:update    # 有意的设计变更后，更新截图基线并提交
+```
+
+## E2E 防画面偏差（两层）
+
+1. **结构契约**（`e2e/pages.spec.ts`）：规格级断言——卡片 2px 描边/硬投影/纸叠三层、16:9 相框比例与内阴影、积木点实心数、站点 r6 半嵌（源骑黑影外缘/目标贴描边）、票券裁切式（overflow hidden + 头部无框 + 双打孔 + 撕线虚/实）。布局微调不误报，破坏规格必红。
+2. **视觉基线**（`e2e/visual.spec.ts` + `e2e/visual.spec.ts-snapshots/`）：五页整页截图像素比对，容差 1%。**基线需随代码提交**；有意变更用 `yarn test:e2e:update` 生成新基线后一并提交。
+
+测试在 `prefers-reduced-motion` 下运行（卡片的 8000ms 翻转与动效关闭，截图稳定）。
diff --git a/apps/design-lab/e2e/pages.spec.ts b/apps/design-lab/e2e/pages.spec.ts
new file mode 100644
index 0000000..3b63eed
--- /dev/null
+++ b/apps/design-lab/e2e/pages.spec.ts
@@ -0,0 +1,159 @@
+import { expect, test } from '@playwright/test'
+
+/**
+ * 设计系统结构契约断言——规格级防回归。
+ * 布局微调不误报，但破坏设计规格（描边/投影/比例/半嵌/裁切）必红。
+ */
+
+const PAGES = ['index', 'colors', 'symbols', 'components', 'shelf'] as const
+
+test.describe('全局画布', () => {
+  for (const p of PAGES) {
+    test(`${p}.html 渲染且有内容`, async ({ page }) => {
+      await page.goto(`/${p}.html`)
+      await expect(page.locator('#root')).not.toBeEmpty()
+      await expect(page.locator('main')).toBeVisible()
+    })
+  }
+
+  test('body 大底为纸色 #FFF9F0', async ({ page }) => {
+    await page.goto('/index.html')
+    const bg = await page.evaluate(() => getComputedStyle(document.body).backgroundColor)
+    expect(bg).toBe('rgb(255, 249, 240)')
+  })
+
+  test('全站无色彩渐变', async ({ page }) => {
+    await page.goto('/shelf.html')
+    const gradients = await page.evaluate(() => {
+      const bad: string[] = []
+      document.querySelectorAll<HTMLElement>('*').forEach((el) => {
+        if (getComputedStyle(el).backgroundImage.includes('gradient')) bad.push(el.tagName)
+      })
+      return bad
+    })
+    expect(gradients, gradients.join(',')).toEqual([])
+  })
+})
+
+test.describe('CourseCard 规格契约', () => {
+  test.beforeEach(async ({ page }) => await page.goto('/components.html'))
+
+  test('2px ink 描边 + 硬投影 + 纸叠三层边', async ({ page }) => {
+    const card = page.locator('a[href="#ch1"]').first()
+    await expect(card).toBeVisible()
+    const s = await card.evaluate((el) => {
+      const cs = getComputedStyle(el)
+      return { bw: cs.borderTopWidth, bc: cs.borderTopColor, shadow: cs.boxShadow }
+    })
+    expect(s.bw).toBe('2px')
+    expect(s.bc).toBe('rgb(17, 17, 17)')
+    expect((s.shadow.match(/rgb|#/g) ?? []).length).toBeGreaterThanOrEqual(4) // 三层纸叠+硬投影（按色值计数）
+    expect(s.shadow).toContain('rgb(17, 17, 17)')
+  })
+
+  test('16:9 相框：比例、3px 黑边、内阴影、章节撞色', async ({ page }) => {
+    const zone = page.locator('a[href="#ch1"] .aspect-video').first()
+    const s = await zone.evaluate((el) => {
+      const cs = getComputedStyle(el)
+      const r = el.getBoundingClientRect()
+      return { ratio: r.width / r.height, bw: cs.borderTopWidth, shadow: cs.boxShadow, bg: cs.backgroundColor }
+    })
+    expect(Math.abs(s.ratio - 16 / 9)).toBeLessThan(0.02)
+    expect(s.bw).toBe('3px')
+    expect(s.shadow).toContain('inset')
+    expect(s.bg).toBe('rgb(255, 107, 107)') // ch1 coral 只进相框
+  })
+
+  test('卡头三件套：▲ + 标题 + 积木点（实心=已学）', async ({ page }) => {
+    const card = page.locator('a[href="#ch2"]').first()
+    const dots = card.locator('span[aria-label^="积木"] i')
+    expect(await dots.count()).toBe(4)
+    const filled = await dots.evaluateAll((ns) => ns.filter((n) => getComputedStyle(n).backgroundColor === 'rgb(17, 17, 17)').length)
+    expect(filled).toBe(2) // ch2 已学 2/4
+    expect(await card.locator('svg').first()).toBeVisible() // ▲
+  })
+
+  test('入口徽章 ①②（推荐起点，非强制）', async ({ page }) => {
+    await expect(page.locator('span[aria-label="推荐入口 1"]')).toBeVisible()
+    await expect(page.locator('span[aria-label="推荐入口 2"]')).toBeVisible()
+  })
+})
+
+test.describe('RouteLine 规格契约', () => {
+  test.beforeEach(async ({ page }) => await page.goto('/shelf.html'))
+
+  test('线形：实线先后 2.5px 无 dash；点线同族 0.1/6 圆帽', async ({ page }) => {
+    const specs = await page.locator('svg path').evaluateAll((ns) =>
+      ns.map((n) => ({ w: n.getAttribute('stroke-width'), dash: n.getAttribute('stroke-dasharray'), cap: n.getAttribute('stroke-linecap') })),
+    )
+    expect(specs.some((s) => s.w === '2.5' && !s.dash)).toBeTruthy()
+    expect(specs.some((s) => s.dash === '0.1 6' && s.cap === 'round')).toBeTruthy()
+  })
+
+  test('虚线相关 4:2（symbols 页线形样张）', async ({ page }) => {
+    await page.goto('/symbols.html')
+    const specs = await page.locator('svg path').evaluateAll((ns) => ns.map((n) => n.getAttribute('stroke-dasharray')))
+    expect(specs).toContain('4 2')
+  })
+
+  test('站点 r6 半嵌：源骑卡右黑影外缘、目标贴左描边', async ({ page }) => {
+    const c1 = await page.locator('a[href="#ch1"]').first().boundingBox()
+    const c2 = await page.locator('a[href="#ch2"]').first().boundingBox()
+    const wrap = await page.locator('main div.relative').first().boundingBox()
+    expect(c1 && c2 && wrap).toBeTruthy()
+
+    const stations = await page.locator('svg circle').evaluateAll((ns) =>
+      ns.map((n) => ({ cx: +(n.getAttribute('cx') ?? 0), r: +(n.getAttribute('r') ?? 0) })).filter((s) => s.r === 6), // 排除散落 ○ 预期环
+    )
+    expect(stations.length).toBeGreaterThanOrEqual(4)
+
+    const c1ShadowEdge = c1!.x - wrap!.x + c1!.width + 7 // 描边外 + 7px 黑影
+    const c2Border = c2!.x - wrap!.x
+    expect(stations.some((s) => Math.abs(s.cx - c1ShadowEdge) <= 3), `源站点应骑黑影外缘 x≈${c1ShadowEdge}`).toBeTruthy()
+    expect(stations.some((s) => Math.abs(s.cx - c2Border) <= 3), `目标站点应贴左描边 x≈${c2Border}`).toBeTruthy()
+  })
+
+  test('实线端点落在水平端口（M x y H 起、H x 止）', async ({ page }) => {
+    const d = await page.locator('svg path[stroke-width="2.5"]').first().getAttribute('d')
+    expect(d).toMatch(/^M [\d.]+ [\d.]+ H/)
+    expect(d).toMatch(/H [\d.]+$/)
+  })
+})
+
+test.describe('票券规格契约', () => {
+  test.beforeEach(async ({ page }) => await page.goto('/symbols.html'))
+
+  test('裁切式：overflow hidden + 单一 2px 描边 + 头部色块无独立边框', async ({ page }) => {
+    const done = page.locator('.ticket-pk').first()
+    await expect(done).toBeVisible()
+    const s = await done.evaluate((el) => {
+      const cs = getComputedStyle(el)
+      const head = el.firstElementChild as HTMLElement
+      const hcs = getComputedStyle(head)
+      return { ov: cs.overflow, bw: cs.borderTopWidth, headBorder: hcs.borderTopWidth, headBg: hcs.backgroundColor }
+    })
+    expect(s.ov).toBe('hidden')
+    expect(s.bw).toBe('2px')
+    expect(s.headBorder).toBe('0px') // 头部色块永不自带描边
+    expect(s.headBg).not.toBe('rgba(0, 0, 0, 0)')
+  })
+
+  test('打孔伪元素在位（完成票 ×2 孔）', async ({ page }) => {
+    const holes = await page.locator('.ticket-pk').first().evaluate((el) => {
+      const b = getComputedStyle(el, '::before')
+      const a = getComputedStyle(el, '::after')
+      return [b.content, a.content].filter((c) => c !== 'none').length
+    })
+    expect(holes).toBe(2)
+  })
+
+  test('撕线：完成=虚线、未开始=实线', async ({ page }) => {
+    const styles = await page.evaluate(() =>
+      [...document.querySelectorAll('div')]
+        .filter((el) => String(el.className).includes('w-[216px]'))
+        .map((el) => getComputedStyle(el.lastElementChild as HTMLElement).borderLeftStyle),
+    )
+    expect(styles).toContain('dashed')
+    expect(styles).toContain('solid')
+  })
+})
diff --git a/apps/design-lab/e2e/visual.spec.ts b/apps/design-lab/e2e/visual.spec.ts
new file mode 100644
index 0000000..42dca10
--- /dev/null
+++ b/apps/design-lab/e2e/visual.spec.ts
@@ -0,0 +1,26 @@
+import { expect, test } from '@playwright/test'
+
+/**
+ * 像素级视觉回归基线——防止后续改动出现画面偏差。
+ * 有意的设计变更：`yarn test:e2e -- --update-snapshots` 后提交新基线。
+ */
+const CASES: [name: string, path: string][] = [
+  ['index', '/index.html'],
+  ['colors', '/colors.html'],
+  ['symbols', '/symbols.html'],
+  ['components', '/components.html'],
+  ['shelf', '/shelf.html'],
+]
+
+for (const [name, path] of CASES) {
+  test(`视觉基线 · ${name}`, async ({ page }) => {
+    await page.goto(path)
+    await page.evaluate(() => document.fonts.ready)
+    await page.waitForTimeout(300)
+    await expect(page).toHaveScreenshot(`${name}.png`, {
+      fullPage: true,
+      maxDiffPixelRatio: 0.01, // 允许 1% 以内的字体渲染差异
+      animations: 'disabled',
+    })
+  })
+}
diff --git a/apps/design-lab/e2e/visual.spec.ts-snapshots/colors-chromium-linux.png b/apps/design-lab/e2e/visual.spec.ts-snapshots/colors-chromium-linux.png
new file mode 100644
index 0000000..a2e1e10
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diff --git a/apps/design-lab/e2e/visual.spec.ts-snapshots/components-chromium-linux.png b/apps/design-lab/e2e/visual.spec.ts-snapshots/components-chromium-linux.png
new file mode 100644
index 0000000..26bfd82
Binary files /dev/null and b/apps/design-lab/e2e/visual.spec.ts-snapshots/components-chromium-linux.png differ
diff --git a/apps/design-lab/e2e/visual.spec.ts-snapshots/index-chromium-linux.png b/apps/design-lab/e2e/visual.spec.ts-snapshots/index-chromium-linux.png
new file mode 100644
index 0000000..c5da908
Binary files /dev/null and b/apps/design-lab/e2e/visual.spec.ts-snapshots/index-chromium-linux.png differ
diff --git a/apps/design-lab/e2e/visual.spec.ts-snapshots/shelf-chromium-linux.png b/apps/design-lab/e2e/visual.spec.ts-snapshots/shelf-chromium-linux.png
new file mode 100644
index 0000000..9b27718
Binary files /dev/null and b/apps/design-lab/e2e/visual.spec.ts-snapshots/shelf-chromium-linux.png differ
diff --git a/apps/design-lab/e2e/visual.spec.ts-snapshots/symbols-chromium-linux.png b/apps/design-lab/e2e/visual.spec.ts-snapshots/symbols-chromium-linux.png
new file mode 100644
index 0000000..b70f66a
Binary files /dev/null and b/apps/design-lab/e2e/visual.spec.ts-snapshots/symbols-chromium-linux.png differ
diff --git a/apps/design-lab/package.json b/apps/design-lab/package.json
index b687e95..a00e45f 100644
--- a/apps/design-lab/package.json
+++ b/apps/design-lab/package.json
@@ -6,13 +6,16 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc -b && vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test:e2e": "playwright test",
+    "test:e2e:update": "playwright test --update-snapshots"
   },
   "dependencies": {
     "react": "^18.3.1",
     "react-dom": "^18.3.1"
   },
   "devDependencies": {
+    "@playwright/test": "1.63.0",
     "@tailwindcss/vite": "^4.1.0",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
@@ -21,4 +24,4 @@
     "typescript": "~5.6.2",
     "vite": "^6.0.0"
   }
-}
+}
\ No newline at end of file
diff --git a/apps/design-lab/playwright.config.ts b/apps/design-lab/playwright.config.ts
new file mode 100644
index 0000000..8e3a0dd
--- /dev/null
+++ b/apps/design-lab/playwright.config.ts
@@ -0,0 +1,25 @@
+import { defineConfig, devices } from '@playwright/test'
+
+/**
+ * 设计系统 E2E：防止后续改动出现画面偏差。
+ * - pages.spec：结构契约断言（规格级：描边/投影/比例/半嵌坐标）
+ * - visual.spec：整页截图基线（像素级回归）
+ * 截图基线在 e2e/__screenshots__/，需随代码一起提交；
+ * 有意的设计变更请运行 `yarn test:e2e -- --update-snapshots` 后提交新基线。
+ */
+export default defineConfig({
+  testDir: 'e2e',
+  timeout: 30_000,
+  fullyParallel: true,
+  use: {
+    baseURL: 'http://localhost:4490',
+    // 卡片尊重 prefers-reduced-motion：翻转关闭、动画停用，截图才稳定
+    contextOptions: { reducedMotion: 'reduce', viewport: { width: 1280, height: 900 } },
+  },
+  webServer: {
+    command: 'yarn preview --port 4490 --strictPort',
+    url: 'http://localhost:4490/index.html',
+    reuseExistingServer: true,
+  },
+  projects: [{ name: 'chromium', use: { ...devices['Desktop Chrome'] } }],
+})
diff --git a/apps/design-lab/src/components/Ticket.tsx b/apps/design-lab/src/components/Ticket.tsx
index abc3ab1..8bcb913 100644
--- a/apps/design-lab/src/components/Ticket.tsx
+++ b/apps/design-lab/src/components/Ticket.tsx
@@ -6,7 +6,6 @@ export function Ticket({ chapter, done }: { chapter: Chapter; done: boolean }) {
   return (
     <div
       className={`relative flex w-[216px] items-stretch overflow-hidden rounded-xl border-2 border-ink bg-paper shadow-[5px_5px_0_var(--color-ink)] ${done ? 'ticket-pk' : ''}`}
-      style={{ ['--tk-color' as string]: chapter.color }}
     >
       {/* 头部媒体块：章节色纯填充，无独立边框（由票体裁切） */}
       <div className="flex w-14 shrink-0 items-center justify-center text-[22px]" style={{ background: chapter.color }}>{chapter.emoji}</div>
@@ -21,14 +20,6 @@ export function Ticket({ chapter, done }: { chapter: Chapter; done: boolean }) {
       >
         №{String(chapter.id).padStart(2, '0')}
       </div>
-      <style>{`
-        .ticket-pk::before, .ticket-pk::after {
-          content: ''; position: absolute; left: 160px; width: 14px; height: 14px;
-          border-radius: 50%; background: var(--color-paper); border: 2px solid var(--color-ink);
-        }
-        .ticket-pk::before { top: -10px; }
-        .ticket-pk::after { bottom: -10px; }
-      `}</style>
     </div>
   )
 }
diff --git a/apps/design-lab/src/pages/shelf/App.tsx b/apps/design-lab/src/pages/shelf/App.tsx
index bfc06f0..10e5b2e 100644
--- a/apps/design-lab/src/pages/shelf/App.tsx
+++ b/apps/design-lab/src/pages/shelf/App.tsx
@@ -9,7 +9,7 @@ import { Bar, Cross, MissMark, Ring, Tremble, Tri, Wave } from '../../components
 const nodes = {
   1: { id: 1, borderLeft: 40, right: 299, y: 180 },
   2: { id: 2, borderLeft: 378, right: 639, y: 108 },
-  4: { id: 4, borderLeft: 698, right: 848, y: 108 },
+  5: { id: 5, borderLeft: 698, right: 848, y: 108 },
 } as const
 
 const SCATTER = [
diff --git a/apps/design-lab/src/styles/tokens.css b/apps/design-lab/src/styles/tokens.css
index d0a8711..2ca5f2f 100644
--- a/apps/design-lab/src/styles/tokens.css
+++ b/apps/design-lab/src/styles/tokens.css
@@ -31,3 +31,22 @@
 .sem-shadow {
   filter: drop-shadow(0 1px 0 rgba(255, 255, 255, 0.9));
 }
+
+/* 票券打孔：⌀14 圆跨边，被 overflow-hidden 裁成半圆缺口（完成票专用） */
+.ticket-pk::before,
+.ticket-pk::after {
+  content: '';
+  position: absolute;
+  left: 160px;
+  width: 14px;
+  height: 14px;
+  border-radius: 50%;
+  background: var(--color-paper);
+  border: 2px solid var(--color-ink);
+}
+.ticket-pk::before {
+  top: -10px;
+}
+.ticket-pk::after {
+  bottom: -10px;
+}
diff --git a/apps/design-lab/test-results/.last-run.json b/apps/design-lab/test-results/.last-run.json
new file mode 100644
index 0000000..cbcc1fb
--- /dev/null
+++ b/apps/design-lab/test-results/.last-run.json
@@ -0,0 +1,4 @@
+{
+  "status": "passed",
+  "failedTests": []
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index ad34917..a2e3cbb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3172,6 +3172,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@playwright/test@npm:1.63.0":
+  version: 1.63.0
+  resolution: "@playwright/test@npm:1.63.0"
+  dependencies:
+    playwright: "npm:1.63.0"
+  bin:
+    playwright: cli.js
+  checksum: 10/b5e561b8f11488b8062b98c5cf975740f48ae7e9b455fb7152e0fb90d8e13f20c3c3ae6a15833655364246b99f5a46f6601daa5a9eef01de5004c8be7e2b3af3
+  languageName: node
+  linkType: hard
+
 "@pnpm/config.env-replace@npm:^1.1.0":
   version: 1.1.0
   resolution: "@pnpm/config.env-replace@npm:1.1.0"
@@ -3447,6 +3458,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@stack/design-lab@workspace:apps/design-lab"
   dependencies:
+    "@playwright/test": "npm:1.63.0"
     "@tailwindcss/vite": "npm:^4.1.0"
     "@types/react": "npm:^18.3.12"
     "@types/react-dom": "npm:^18.3.1"
@@ -9905,6 +9917,26 @@ __metadata:
   languageName: node
   linkType: hard
 
+"playwright-core@npm:1.63.0":
+  version: 1.63.0
+  resolution: "playwright-core@npm:1.63.0"
+  bin:
+    playwright-core: cli.js
+  checksum: 10/d0f7c70786f5e08aa7553a77ba28c07427086e323ae8c4126a647debd8181966dc11d6f8fe1462f2a776ad60c95451b08f01fbee17b11e69a5bd9a2070fe75a6
+  languageName: node
+  linkType: hard
+
+"playwright@npm:1.63.0":
+  version: 1.63.0
+  resolution: "playwright@npm:1.63.0"
+  dependencies:
+    playwright-core: "npm:1.63.0"
+  bin:
+    playwright: cli.js
+  checksum: 10/ec87c22888148603a8955bc2a092f416455af931fe53925b9143ce333b83e42a6d8c159c00a4f2d232b27100cf3eadd93cec8a6e5c4e12c1c00663d2034dd515
+  languageName: node
+  linkType: hard
+
 "postcss-attribute-case-insensitive@npm:^7.0.1":
   version: 7.0.1
   resolution: "postcss-attribute-case-insensitive@npm:7.0.1"