diff --git a/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasFocusModel.ts b/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasFocusModel.ts
index 6096de61c..1c37bd3eb 100644
--- a/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasFocusModel.ts
+++ b/apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasFocusModel.ts
@@ -38,6 +38,37 @@ export function isResourceCanvasInteractionTarget(
   return Boolean(target?.closest(RESOURCE_CANVAS_INTERACTION_SELECTOR));
 }
 
+/**
+ * 画布浮层里有自己滚动区的那几个：落在它们里面的滚轮归浮层，画布不得消费。
+ *
+ * 词表与 `RESOURCE_CANVAS_INTERACTION_SELECTOR` 的浮层成员同一套类名，只去掉按钮 / 输入 /
+ * 资源卡这类本身不该吞滚轮的交互控件（在卡片上滚轮照旧平移 / 缩放画布）：
+ * - `.image-canvas-editor__generation-composer`：快速编辑 / 角色动画浮层（自带提示词滚动区）；
+ * - `.game-resource-info-panel`：资源信息浮层（`overflow: auto`）；
+ * - `.game-resource-filter-panel`：筛选面板（卡片区 `overflow-y: auto`）。
+ */
+export const RESOURCE_CANVAS_WHEEL_OVERLAY_SELECTOR = [
+  '.image-canvas-editor__generation-composer',
+  '.game-resource-info-panel',
+  '.game-resource-filter-panel',
+].join(', ');
+
+/**
+ * 这一次滚轮是不是落在「自己吃滚轮的画布浮层」里。
+ *
+ * portal 到 `document.body` 的浮层（`@` 资源选择器与候选菜单、共享模型 / 比例弹出层…）由
+ * `isResourceReferenceOverlayTarget` 与共享 hook 的 portal 弹层判据负责，这里只管留在画布
+ * DOM 里的浮层。
+ */
+export function isResourceCanvasWheelOverlayTarget(
+  target: EventTarget | null,
+): boolean {
+  return (
+    target instanceof Element &&
+    target.closest(RESOURCE_CANVAS_WHEEL_OVERLAY_SELECTOR) !== null
+  );
+}
+
 /**
  * 画布浮层是否可以被清焦点顺手关掉。
  *
diff --git a/apps/ai-game-creator-shell/src/view/project-development/index.tsx b/apps/ai-game-creator-shell/src/view/project-development/index.tsx
index a63058a09..884c20fb2 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/index.tsx
+++ b/apps/ai-game-creator-shell/src/view/project-development/index.tsx
@@ -88,7 +88,10 @@ import {
 import { ImageCanvasProjectAssetPickerDialog } from '../../../../../src/components/image-editor/ImageCanvasProjectAssetPickerDialog';
 import { ImageCanvasQuickEditPanelView } from '../../../../../src/components/image-editor/ImageCanvasQuickEditPanelView';
 import { ImageCanvasSelectedLayerToolbarView } from '../../../../../src/components/image-editor/ImageCanvasSelectedLayerToolbarView';
-import { useImageCanvasFloatingOptionDismiss } from '../../../../../src/components/image-editor/useImageCanvasFloatingOptionDismiss';
+import {
+  isFloatingOverlayWheelEvent,
+  useImageCanvasFloatingOptionDismiss,
+} from '../../../../../src/components/image-editor/useImageCanvasFloatingOptionDismiss';
 import { DesignWorkspacePanel } from '../../features/project-workspace/DesignWorkspacePanel';
 import {
   LocalGamePreviewFrame,
@@ -115,6 +118,7 @@ import {
 import {
   canDismissResourceCanvasQuickEdit,
   isResourceCanvasInteractionTarget,
+  isResourceCanvasWheelOverlayTarget,
   resolveResourceCanvasFloatingPanelDismissOpen,
   resolveResourceCanvasFocusEscapeActive,
 } from '../../features/resource-canvas/resourceCanvasFocusModel';
@@ -1120,6 +1124,23 @@ function ResourceBookTitleBar({
   );
 }
 
+/**
+ * 画布滚轮归属的「已登记浮层」总表，与「点外部关闭」用的是同一套浮层口径：
+ * - `@` 资源选择器与候选菜单 portal 到 `document.body`；
+ * - 留在画布 DOM 里、自带滚动区的画布浮层（快速编辑 / 信息 / 筛选，见
+ *   `isResourceCanvasWheelOverlayTarget`）。
+ *
+ * 落在它们里面的滚轮归浮层自己，画布不消费（不 preventDefault、不动视口）。
+ */
+function isResourceCanvasFloatingOverlayWheelTarget(
+  target: EventTarget | null,
+) {
+  return (
+    isResourceReferenceOverlayTarget(target) ||
+    isResourceCanvasWheelOverlayTarget(target)
+  );
+}
+
 function ResourceBookScene({
   plan,
   resourceBookState,
@@ -4406,11 +4427,28 @@ export default function ProjectDevelopmentView({
 
   const handleResourceBookWheel = useCallback(
     (event: ReactWheelEvent<HTMLDivElement> | WheelEvent) => {
-      resourceBookTransitionControllerRef.current.settle();
       const sceneElement = resourceBookManagerRef.current;
       if (!sceneElement) {
         return;
       }
+      /*
+        浮层优先：滚轮只在「这一下确实落在资源画布管理区里」时才归画布。
+
+        React 的 portal 事件沿 **React 树** 冒泡（React 把委托监听挂在 portal 容器
+        `document.body` 上），所以 `@` 选择素材浮层里的滚轮也会走到场景根的 `onWheel`
+        这里；而它在 DOM 上根本不在管理区里。判据与上面「点外部关闭」同一份
+        （`isFloatingOverlayWheelEvent` = 浮层边界 + 已登记浮层）：用户在选择器列表上
+        滚轮时，列表自己滚，背后的画布不再跟着平移 / 缩放。
+      */
+      if (
+        isFloatingOverlayWheelEvent(event.target, {
+          boundaryRefs: [resourceBookManagerRef],
+          isInsideExtraOverlay: isResourceCanvasFloatingOverlayWheelTarget,
+        })
+      ) {
+        return;
+      }
+      resourceBookTransitionControllerRef.current.settle();
       event.preventDefault();
       const rect = sceneElement.getBoundingClientRect();
       const screenPoint = {
diff --git a/apps/ai-game-creator-shell/tests/projectResourceLiveIntegration.test.tsx b/apps/ai-game-creator-shell/tests/projectResourceLiveIntegration.test.tsx
index 58c5ebf77..d02c743b5 100644
--- a/apps/ai-game-creator-shell/tests/projectResourceLiveIntegration.test.tsx
+++ b/apps/ai-game-creator-shell/tests/projectResourceLiveIntegration.test.tsx
@@ -893,6 +893,93 @@ describe('project resource live canvas integration', () => {
     expect(deriveCalls[0]?.prompt).toBe(expectedText);
   });
 
+  /**
+   * 用户报的原始现象：在「快速编辑 → 插入素材引用」开出的选择器列表上滚鼠标滚轮，
+   * 滚的不是列表，而是背后的资源画布（画布跟着缩放 / 平移）。
+   *
+   * 链路：选择器 portal 到 `document.body`，而 React 的 portal 事件沿 **React 树** 冒泡
+   * （React 把委托监听挂在 portal 容器上），所以它的 wheel 照样走到画布场景根的
+   * `onWheel`；修复前那一下会被画布消费掉。这里用真实事件序列钉住「浮层里的滚轮归浮层、
+   * 画布视口一格不动」，同时用对照用例钉住「画布本体的滚轮照旧」。
+   */
+  it('在选择素材浮层里滚轮：浮层自己收到、画布视口不动，画布本体滚轮照旧', async () => {
+    installTauri();
+    render(<DerivedWorkbench includeArt />);
+
+    fireEvent.click(screen.getByRole('button', { name: '打开待归类' }));
+    fireEvent.click(await findResourceSelectButton('source-art.png'));
+    const toolbar = await screen.findByRole('toolbar', {
+      name: '图片工具栏',
+    });
+    fireEvent.click(within(toolbar).getByRole('button', { name: '快速编辑' }));
+    const panel = await screen.findByRole('dialog', {
+      name: '快速编辑图片',
+    });
+    fireEvent.click(
+      within(panel).getByRole('button', { name: '插入素材引用' }),
+    );
+    const picker = await screen.findByRole('dialog', { name: '选择素材' });
+
+    // 前提自检：选择器 DOM 上确实不在资源画本里（这正是 React 事件仍会冒泡到画布的原因）。
+    const manager = document.querySelector('.game-resource-book-manager');
+    expect(manager?.contains(picker)).toBe(false);
+    expect(picker.parentElement).toBe(document.body);
+
+    const list = picker.querySelector('.resource-reference-picker-list');
+    if (!list) throw new Error('missing picker list');
+    const overlayWheelCalls = vi.fn();
+    list.addEventListener('wheel', overlayWheelCalls);
+
+    const readViewport = () =>
+      document
+        .querySelector('[data-resource-viewport]')
+        ?.getAttribute('data-resource-viewport');
+    const readSceneWorldTransform = () =>
+      document
+        .querySelector('.game-resource-book-scene-world')
+        ?.getAttribute('style');
+    const viewportBefore = readViewport();
+    const sceneWorldBefore = readSceneWorldTransform();
+    expect(viewportBefore).toBeTruthy();
+
+    // 真实事件序列：从浮层内部元素派发滚轮（等同用户在选择器列表上滚）。
+    const overlayWheel = new WheelEvent('wheel', {
+      bubbles: true,
+      cancelable: true,
+      deltaY: 240,
+      clientX: 80,
+      clientY: 60,
+    });
+    act(() => {
+      list.dispatchEvent(overlayWheel);
+    });
+
+    // 浮层自己收到该事件、且没被画布消费（列表按原生行为滚动）。
+    expect(overlayWheelCalls).toHaveBeenCalledTimes(1);
+    expect(overlayWheel.defaultPrevented).toBe(false);
+    // 画布视口一格不动。
+    expect(readViewport()).toBe(viewportBefore);
+    expect(readSceneWorldTransform()).toBe(sceneWorldBefore);
+
+    list.removeEventListener('wheel', overlayWheelCalls);
+
+    // 对照用例：画布本体（场景根）上的滚轮必须照旧平移视口——修复没把画布交互一起关掉。
+    const sceneRoot = document.querySelector('.game-resource-book-scene');
+    if (!sceneRoot) throw new Error('missing scene root');
+    const canvasWheel = new WheelEvent('wheel', {
+      bubbles: true,
+      cancelable: true,
+      deltaY: 120,
+      clientX: 90,
+      clientY: 70,
+    });
+    act(() => {
+      sceneRoot.dispatchEvent(canvasWheel);
+    });
+    expect(canvasWheel.defaultPrevented).toBe(true);
+    expect(readViewport()).not.toBe(viewportBefore);
+  });
+
   it('creates a brand new media asset from the canvas generation entry with a create-mode derive request', async () => {
     const { deriveCalls } = installTauri({ failFirstDerive: true });
     render(<DerivedWorkbench />);
diff --git a/apps/ai-game-creator-shell/tests/resourceCanvasFloatingDismiss.test.tsx b/apps/ai-game-creator-shell/tests/resourceCanvasFloatingDismiss.test.tsx
index 6313488ab..e4bd72b11 100644
--- a/apps/ai-game-creator-shell/tests/resourceCanvasFloatingDismiss.test.tsx
+++ b/apps/ai-game-creator-shell/tests/resourceCanvasFloatingDismiss.test.tsx
@@ -6,11 +6,15 @@ import { afterEach, describe, expect, test, vi } from 'vitest';
 
 import type { QuickEditPanelState } from '../../../src/components/image-editor/ImageCanvasEditorTypes';
 import { ImageCanvasQuickEditPanelView } from '../../../src/components/image-editor/ImageCanvasQuickEditPanelView';
-import { useImageCanvasFloatingOptionDismiss } from '../../../src/components/image-editor/useImageCanvasFloatingOptionDismiss';
+import {
+  isFloatingOverlayWheelEvent,
+  useImageCanvasFloatingOptionDismiss,
+} from '../../../src/components/image-editor/useImageCanvasFloatingOptionDismiss';
 import {
   canDismissResourceCanvasQuickEdit,
   isResourceCanvasHostOverlayOpen,
   isResourceCanvasInteractionTarget,
+  isResourceCanvasWheelOverlayTarget,
   resolveResourceCanvasFloatingPanelDismissOpen,
   resolveResourceCanvasFocusEscapeActive,
 } from '../src/features/resource-canvas/resourceCanvasFocusModel';
@@ -315,6 +319,69 @@ describe('资源画布浮层关闭时机', () => {
   });
 });
 
+describe('画布滚轮归属判据', () => {
+  /**
+   * 与「点外部关闭」同一份口径：portal 出去的东西 DOM 上不在边界里，但 React 的事件会沿
+   * React 树冒泡到画布宿主的 `onWheel`。滚轮这类事件必须按 DOM 判归属，否则用户在
+   * `@` 选择器列表上滚动时，背后的画布会跟着平移 / 缩放。
+   */
+  test('portal 出去的浮层与已登记浮层归浮层，边界里的画布元素归画布', () => {
+    document.body.innerHTML = `
+      <div id="owner">
+        <div id="card-blank">画布空白</div>
+        <div class="image-canvas-editor__portal-menu"><span id="menu-item">共享弹出层选项</span></div>
+        <div class="resource-reference-picker"><span id="picker-item">选择器条目</span></div>
+      </div>
+      <div id="portal"><span id="portal-item">portal 到 body 的候选项</span></div>
+    `;
+    const ownerRef = { current: document.querySelector<HTMLElement>('#owner') };
+    const options = {
+      boundaryRefs: [ownerRef],
+      isInsideExtraOverlay: (target: EventTarget | null) =>
+        target instanceof Element &&
+        target.closest('.resource-reference-picker') !== null,
+    };
+    const at = (selector: string) =>
+      document.querySelector<HTMLElement>(selector);
+
+    // 画布自己的：DOM 在边界里，也不是浮层。
+    expect(isFloatingOverlayWheelEvent(at('#card-blank'), options)).toBe(false);
+    // portal 到 body 的浮层：DOM 根本不在边界里 ⇒ 归浮层。
+    expect(isFloatingOverlayWheelEvent(at('#portal-item'), options)).toBe(true);
+    // 边界里但落在共享弹出层上：与「点外部关闭」同口径 ⇒ 归浮层。
+    expect(isFloatingOverlayWheelEvent(at('#menu-item'), options)).toBe(true);
+    // 边界里但由宿主登记成浮层（`@` 选择器 / 候选菜单）⇒ 归浮层。
+    expect(isFloatingOverlayWheelEvent(at('#picker-item'), options)).toBe(true);
+    // 判不出归属（没有事件目标）时不抢：归浮层。
+    expect(isFloatingOverlayWheelEvent(null, options)).toBe(true);
+
+    document.body.innerHTML = '';
+  });
+
+  test('自带滚动区的画布浮层归浮层，资源卡与画布空白仍归画布', () => {
+    document.body.innerHTML = `
+      <div class="game-resource-book-manager">
+        <div class="game-resource-card"><span id="card">卡片</span></div>
+        <div id="blank">画布空白</div>
+        <div class="image-canvas-editor__generation-composer"><span id="prompt">快速编辑提示词</span></div>
+        <div class="game-resource-info-panel"><span id="info">信息浮层</span></div>
+        <div class="game-resource-filter-panel"><span id="filter">筛选面板</span></div>
+      </div>
+    `;
+    const at = (selector: string) =>
+      document.querySelector<HTMLElement>(selector);
+
+    expect(isResourceCanvasWheelOverlayTarget(at('#card'))).toBe(false);
+    expect(isResourceCanvasWheelOverlayTarget(at('#blank'))).toBe(false);
+    expect(isResourceCanvasWheelOverlayTarget(at('#prompt'))).toBe(true);
+    expect(isResourceCanvasWheelOverlayTarget(at('#info'))).toBe(true);
+    expect(isResourceCanvasWheelOverlayTarget(at('#filter'))).toBe(true);
+    expect(isResourceCanvasWheelOverlayTarget(null)).toBe(false);
+
+    document.body.innerHTML = '';
+  });
+});
+
 /** 与 AGC 一样只给必要 props：下拉弹层就地渲染，不走 portal。 */
 function QuickEditPanelHarness({
   initialPanel,
diff --git a/docs/project-memory/shared-memory/pitfalls.md b/docs/project-memory/shared-memory/pitfalls.md
index 39626df0b..b55af4ce4 100644
--- a/docs/project-memory/shared-memory/pitfalls.md
+++ b/docs/project-memory/shared-memory/pitfalls.md
@@ -2,6 +2,15 @@
 
 > 当前口径：本文件保留可复用的排障经验；历史条目的旧路由、旧版本和已删除文档仅作根因背景，不得据此恢复退役入口。当前命令、路由和 schema 以代码与 `docs/README.md` 为准。
 
+## 2026-09-12 画布滚轮要按 DOM 归属判定，portal 出去的浮层不能把滚轮让给画布
+
+- **现象**：资源卡「快速编辑」里用 `@` 开出「选择素材」浮层后，在选择器列表上滚鼠标滚轮，列表自己在滚，背后的资源画布也一起平移 / 缩放（用户口语：「滚轮还是回滚到画布上」）。
+- **原因**：选择器与输入区候选菜单 `createPortal(..., document.body)`，DOM 上不在画布管理区里；但 React 的 portal 事件沿 **React 树** 冒泡（React 把委托监听挂在 portal 容器上），所以它们的 `wheel` 照样走到画布场景根的 `onWheel`，被当成画布手势消费。React 的 `wheel` 委托监听是 passive 的：`preventDefault()` 是空操作（只报 warning），真正出问题的是视口状态被改写——所以「事件没被 preventDefault」不能作为「画布没吃这一下」的判据。
+- **处理**：滚轮归属与「点外部关闭」共用同一份浮层口径（`src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts`：`isEventInsideFloatingOverlay` + `isFloatingOverlayWheelEvent`）——DOM 不在宿主边界里的（portal 出去的一律算浮层）与已登记为浮层内部的都归浮层。资源画布只保留 `handleResourceBookWheel` 一处守卫，留在画布 DOM 里自带滚动区的浮层（快速编辑 / 信息 / 筛选，见 `RESOURCE_CANVAS_WHEEL_OVERLAY_SELECTOR`）按同一入口登记，不要再逐浮层加 `stopPropagation`。判据判不出归属时（没有元素目标）不抢滚轮。
+- **排查顺序**：先确认浮层是不是 portal 出去的；是的话不要先怀疑 CSS `overflow`、`overscroll-behavior` 或事件被 `preventDefault`，直接查画布宿主上的 `onWheel` / `onPointerDown` 有没有做 DOM 归属判断。
+- **验证**：`npm run test -- apps/ai-game-creator-shell/tests/resourceCanvasFloatingDismiss.test.tsx`（判据单测，含 portal / 共享弹出层 / 已登记浮层三种来源与「判不出归属不抢」）与 `npm run test -- apps/ai-game-creator-shell/tests/projectResourceLiveIntegration.test.tsx`（真实事件序列：选择器列表里派发 `wheel` → 画布 `data-resource-viewport` 不变、浮层自己收到该事件；对照组：场景根上派发 `wheel` → 视口照旧变化）。
+- **关联**：`src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts`、`apps/ai-game-creator-shell/src/view/project-development/index.tsx`（`handleResourceBookWheel`）、`apps/ai-game-creator-shell/src/features/resource-canvas/resourceCanvasFocusModel.ts`
+
 ## 2026-09-12 策划项目重开前必须恢复运行模式
 
 - 工作台不能只依赖创建时的内存 `startMode`：重开时丢失该值会挂载游戏资源画布，而对话恢复后又进入策划状态，造成左右区域不一致。
diff --git a/src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts b/src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts
index 6e9762b5e..25e13d409 100644
--- a/src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts
+++ b/src/components/image-editor/useImageCanvasFloatingOptionDismiss.ts
@@ -4,6 +4,12 @@ type FloatingOptionBoundaryRef = {
   readonly current: HTMLElement | null;
 };
 
+/** 浮层边界登记：谁算「浮层内部」，关闭判定与滚轮归属共用同一份。 */
+type FloatingOverlayBoundaryOptions = {
+  boundaryRefs?: Array<FloatingOptionBoundaryRef | null | undefined>;
+  isInsideExtraOverlay?: (target: EventTarget | null) => boolean;
+};
+
 type UseImageCanvasFloatingOptionDismissOptions = {
   isOpen: boolean;
   boundaryRefs: Array<FloatingOptionBoundaryRef | null | undefined>;
@@ -38,10 +44,62 @@ function isEventInsideBoundary(
 function isEventInsideFloatingMenu(target: EventTarget | null) {
   return (
     target instanceof Element &&
-    target.closest('.image-canvas-editor__portal-menu')
+    target.closest('.image-canvas-editor__portal-menu') !== null
   );
 }
 
+/**
+ * 事件是否落在「已登记为浮层」的那几块 DOM 里。
+ *
+ * 这些浮层 portal 到 `document.body`（共享弹出层）或由宿主额外登记（`isInsideExtraOverlay`），
+ * 关闭判定与滚轮归属共用这一份口径，避免两处各写一套白名单。
+ */
+function isEventInsideRegisteredOverlay(
+  target: EventTarget | null,
+  isInsideExtraOverlay?: (target: EventTarget | null) => boolean,
+) {
+  return (
+    isEventInsideFloatingMenu(target) || isInsideExtraOverlay?.(target) === true
+  );
+}
+
+/**
+ * 「点外部关闭」的边界判据：DOM 在边界里（含 portal 出去的浮层登记）就算内部。
+ */
+export function isEventInsideFloatingOverlay(
+  target: EventTarget | null,
+  { boundaryRefs = [], isInsideExtraOverlay }: FloatingOverlayBoundaryOptions,
+) {
+  return (
+    isEventInsideBoundary(target, boundaryRefs) ||
+    isEventInsideRegisteredOverlay(target, isInsideExtraOverlay)
+  );
+}
+
+/**
+ * 「这一下滚轮归浮层还是归画布」的判据，与上面的关闭判定同源。
+ *
+ * React 的 portal 事件沿 **React 树** 冒泡（React 把委托监听挂在 portal 容器 `document.body`
+ * 上），所以 portal 出去的浮层里的滚轮照样会走到宿主的 `onWheel`。DOM 上根本不在宿主里的
+ * 那一下，只可能是浮层派出来的：必须原样放过，否则用户在 `@` 选择器列表上滚轮时，列表
+ * 在滚、背后的画布也一起平移 / 缩放。
+ *
+ * 两条判据：
+ * 1. DOM 不在边界里 —— portal 出去的浮层（`@` 选择器、候选菜单、共享弹出层……），一律归浮层；
+ * 2. DOM 仍在边界里、但已登记为浮层内部的（`isInsideExtraOverlay` 与共享弹出层），同样归浮层。
+ *
+ * 返回 `true` 表示这次滚轮归浮层，宿主不得消费（不 preventDefault、不动视口）。
+ */
+export function isFloatingOverlayWheelEvent(
+  target: EventTarget | null,
+  { boundaryRefs = [], isInsideExtraOverlay }: FloatingOverlayBoundaryOptions,
+) {
+  if (!isEventInsideBoundary(target, boundaryRefs)) {
+    return true;
+  }
+  return isEventInsideRegisteredOverlay(target, isInsideExtraOverlay);
+}
+
 export function useImageCanvasFloatingOptionDismiss({
   isOpen,
   boundaryRefs,
@@ -57,9 +115,10 @@ export function useImageCanvasFloatingOptionDismiss({
     const handleClick = (event: MouseEvent) => {
       // 中文注释：选项项点击后要保留浮层；父级面板其它区域点击才收起。
       if (
-        isEventInsideBoundary(event.target, boundaryRefs) ||
-        isEventInsideFloatingMenu(event.target) ||
-        isInsideExtraOverlay?.(event.target) === true
+        isEventInsideFloatingOverlay(event.target, {
+          boundaryRefs,
+          isInsideExtraOverlay,
+        })
       ) {
         return;
       }