diff --git a/packages/pen-ai-skills/src/__tests__/detectors-spacing.test.ts b/packages/pen-ai-skills/src/__tests__/detectors-spacing.test.ts
index 5a0260745..6e7f91825 100644
--- a/packages/pen-ai-skills/src/__tests__/detectors-spacing.test.ts
+++ b/packages/pen-ai-skills/src/__tests__/detectors-spacing.test.ts
@@ -131,6 +131,27 @@ describe('detectEdgeSectionPadding', () => {
     expect(detectEdgeSectionPadding(root)).toHaveLength(0);
   });
 
+  // 2026-05-11 user-reported "Today's Special Deal" mobile design — Header,
+  // Categories, and Bottom Nav each carried their own horizontal padding,
+  // but Hero (the Today's Special card) did not. Previous version saw
+  // Hero's missing padding + ≥1 offending child and flagged → root got
+  // 16px gutter on top of every per-section-padded sibling, doubling the
+  // inset everywhere except Hero. New rule: if ANY non-fullbleed content
+  // child already has its own padding, the design has chosen the per-
+  // section gutter mode and root MUST NOT be flagged.
+  it('does NOT flag when ANY content section already has its own h-padding (per-section mode)', () => {
+    const root = mobileRoot([
+      section('hero', [text('hero-text')]), // no padding — would have flagged alone
+      section('categories', [icon('i1'), icon('i2')], { padding: [12, 16] }), // per-section
+      section('content', [text('t')], { padding: [0, 24] }), // per-section
+    ]);
+
+    // Categories + content set per-section gutters; Hero is left edge-to-
+    // edge by design (banner-style fits even without `role: hero`). Root
+    // should stay 0 — flagging would double-pad categories/content.
+    expect(detectEdgeSectionPadding(root)).toHaveLength(0);
+  });
+
   it('preserves vertical padding when suggesting the fix', () => {
     const root = mobileRoot(
       [section('a', [text('t1')]), section('b', [text('t2')])],
diff --git a/packages/pen-ai-skills/src/diagnostics/detectors-spacing.ts b/packages/pen-ai-skills/src/diagnostics/detectors-spacing.ts
index 6433184e1..a193eb7c6 100644
--- a/packages/pen-ai-skills/src/diagnostics/detectors-spacing.ts
+++ b/packages/pen-ai-skills/src/diagnostics/detectors-spacing.ts
@@ -133,17 +133,39 @@ export function detectEdgeSectionPadding(root: PenNode): Issue[] {
     if (isMobileRoot) {
       const rootPadL = getPaddingLeft(node);
       if (rootPadL === 0) {
+        // Two-pass scan over content children (skipping full-bleed
+        // chrome / image-only banners which are intentionally edge-to-
+        // edge):
+        //   - any with own h-padding > 0  → design has chosen the
+        //                                   per-section gutter pattern,
+        //                                   adding root padding would
+        //                                   double-inset everything else
+        //   - any with no padding but text/icon descendants → would
+        //                                   genuinely glue content to
+        //                                   the viewport edge, so flag
+        //
+        // 2026-05-11 user feedback: previous version flagged whenever
+        // ≥1 child had no padding, even when other siblings already
+        // carried per-section padding. Result: root got extra 16px on
+        // top of the existing per-section gutters → "边距过大". The new
+        // rule treats any per-section-padded sibling as a signal that
+        // the design has opted out of root-level gutter and aborts the
+        // detector entirely.
+        let hasPerSectionPaddedSibling = false;
         const offendingChildren: PenNode[] = [];
         for (const child of (node as { children: PenNode[] }).children) {
           if (child.type !== 'frame') continue;
           const role = ((child as { role?: string }).role ?? '').toLowerCase();
           if (FULL_BLEED_ROLES.has(role)) continue;
           if (isImageOnlySection(child)) continue;
-          if (getPaddingLeft(child) > 0) continue;
+          if (getPaddingLeft(child) > 0) {
+            hasPerSectionPaddedSibling = true;
+            continue;
+          }
           if (!hasTextOrIconDescendant(child)) continue;
           offendingChildren.push(child);
         }
-        if (offendingChildren.length > 0) {
+        if (offendingChildren.length > 0 && !hasPerSectionPaddedSibling) {
           const currentPad = (node as unknown as { padding?: unknown }).padding;
           let suggested: number[];
           if (Array.isArray(currentPad) && currentPad.length === 4) {