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
index cd995c0..3ea219e 100644
Binary files a/apps/design-lab/e2e/visual.spec.ts-snapshots/colors-chromium-linux.png and b/apps/design-lab/e2e/visual.spec.ts-snapshots/colors-chromium-linux.png differ
diff --git a/apps/design-lab/src/pages/colors/App.tsx b/apps/design-lab/src/pages/colors/App.tsx
index a20394f..c4e8f40 100644
--- a/apps/design-lab/src/pages/colors/App.tsx
+++ b/apps/design-lab/src/pages/colors/App.tsx
@@ -24,6 +24,34 @@ function Chip({ c, n, h }: { c: string; n: string; h: string }) {
   )
 }
 
+/* 三条规则的「为什么」：鲜艳如何成立、如何被收束、注意力如何分配 */
+const RULES = [
+  {
+    name: '相邻必撞色（跨对取色）',
+    why: '孟菲斯的鲜艳靠碰撞成立：两个高饱和色块相邻时，只有色相拉开距离，视觉才读得出「两个声音」。同色相邻只是一个声音变大——画面发平发闷，鲜艳互相抵消；跨对取色（coral 挨 teal、mustard 挨 violet）反而把彼此衬得更亮。拿到相邻色块时问一句「它俩是不是同一对」，是，就换掉一个。',
+    badCap: '同色相邻失去碰撞',
+    goodCap: '相邻必撞色（跨对取色）',
+    badDemo: <div className="flex overflow-hidden rounded-lg border-2 border-ink"><div className="h-10 w-20 bg-clash1a" /><div className="h-10 w-20 bg-clash1a" /></div>,
+    goodDemo: <div className="flex overflow-hidden rounded-lg border-2 border-ink"><div className="h-10 w-20 bg-clash1a" /><div className="h-10 w-20 bg-clash1b" /></div>,
+  },
+  {
+    name: '黑描边收束鲜艳',
+    why: '高饱和色放在浅纸上会「振动」：边缘发虚、像悬浮在页面上。2px ink 描边给每块鲜艳一道明确的边界，把颜色关进形状里——这也是拟物卡世界的基础：卡片、形状、站点共用同一粗细的墨线，颜色再艳也是「零件」而不是「光」，缩放与低分屏上轮廓依然清晰。去掉描边，鲜艳就是没裁过的布料。',
+    badCap: '无描边的鲜艳漂浮刺眼',
+    goodCap: '一切鲜艳以 2px ink 描边为界',
+    badDemo: <div className="h-10 w-40 rounded-lg bg-clash2a" />,
+    goodDemo: <div className="h-10 w-40 rounded-lg border-2 border-ink bg-clash2a shadow-hard" />,
+  },
+  {
+    name: '大底纸色，鲜艳只进局部',
+    why: '鲜艳是注意力，铺满屏幕等于没有注意力。大底永远是 paper，鲜艳只进相框、站点、散落形状这些局部（≤10%/屏），视线才有落点、正文才永远可读；大底一旦鲜艳，字被淹没，卡片也失去「纸上的物」的载体感。记住层级：大底是世界，卡片是物，鲜艳是物上的标记。',
+    badCap: '大底鲜艳，字被淹没',
+    goodCap: '大底纸色，鲜艳只进局部',
+    badDemo: <div className="flex h-10 w-40 items-center justify-center rounded-lg border-2 border-ink bg-clash1b text-[11px] font-bold">大底鲜艳</div>,
+    goodDemo: <div className="flex h-10 w-40 items-center justify-center rounded-lg border-2 border-ink bg-paper text-[11px] font-bold">纸底安放正文</div>,
+  },
+]
+
 function DoDont({ bad, children, text }: { bad?: boolean; children: React.ReactNode; text: string }) {
   return (
     <div className="flex flex-1 items-center gap-3">
@@ -59,26 +87,21 @@ export function App() {
       <Section label="章节色" note="六章六色，只进 16:9 相框与图标瓦">
         <div className="grid grid-cols-6 gap-3">{CHAPTERS6.map((x) => <Chip key={x.n} {...x} h={x.c} />)}</div>
       </Section>
-      <Section label="规则与反例" note="✗ 禁止 vs ✓ 正确">
-        <div className="space-y-4">
-          <DoDont bad text="同色相邻失去碰撞">
-            <div className="flex overflow-hidden rounded-lg border-2 border-ink"><div className="h-10 w-20 bg-clash1a" /><div className="h-10 w-20 bg-clash1a" /></div>
-          </DoDont>
-          <DoDont text="相邻必撞色（跨对取色）">
-            <div className="flex overflow-hidden rounded-lg border-2 border-ink"><div className="h-10 w-20 bg-clash1a" /><div className="h-10 w-20 bg-clash1b" /></div>
-          </DoDont>
-          <DoDont bad text="无描边的鲜艳漂浮刺眼">
-            <div className="h-10 w-40 rounded-lg bg-clash2a" />
-          </DoDont>
-          <DoDont text="一切鲜艳以 2px ink 描边为界">
-            <div className="h-10 w-40 rounded-lg border-2 border-ink bg-clash2a shadow-hard" />
-          </DoDont>
-          <DoDont bad text="大底鲜艳，字被淹没">
-            <div className="flex h-10 w-40 items-center justify-center rounded-lg border-2 border-ink bg-clash1b text-[11px] font-bold">大底鲜艳</div>
-          </DoDont>
-          <DoDont text="大底纸色，鲜艳只进局部">
-            <div className="flex h-10 w-40 items-center justify-center rounded-lg border-2 border-ink bg-paper text-[11px] font-bold">纸底安放正文</div>
-          </DoDont>
+      <Section label="规则与反例" note="先讲为什么这样设计，再看 ✗/✓ 对照">
+        <div className="space-y-5">
+          {RULES.map((r, i) => (
+            <div key={r.name}>
+              <div className="flex items-baseline gap-2">
+                <span className="flex h-[18px] w-[18px] shrink-0 translate-y-[2px] items-center justify-center rounded-full border-2 border-ink bg-ink text-[10px] font-extrabold text-paper">{i + 1}</span>
+                <b className="text-[13px]">{r.name}</b>
+              </div>
+              <p className="m-0 mt-1.5 mb-2 max-w-[760px] text-[11.5px] leading-relaxed text-body">{r.why}</p>
+              <div className="grid grid-cols-2 gap-3">
+                <DoDont bad text={r.badCap}>{r.badDemo}</DoDont>
+                <DoDont text={r.goodCap}>{r.goodDemo}</DoDont>
+              </div>
+            </div>
+          ))}
         </div>
       </Section>
     </Page>
diff --git a/docs/screenshots/design-lab/pr_colors.png b/docs/screenshots/design-lab/pr_colors.png
index cd995c0..3ea219e 100644
Binary files a/docs/screenshots/design-lab/pr_colors.png and b/docs/screenshots/design-lab/pr_colors.png differ