diff --git a/.hermes/shared-memory/pitfalls.md b/.hermes/shared-memory/pitfalls.md
index c2e411de..bcee64c9 100644
--- a/.hermes/shared-memory/pitfalls.md
+++ b/.hermes/shared-memory/pitfalls.md
@@ -200,6 +200,14 @@
 - 验证：`npm test -- src/components/rpg-entry/RpgEntryFlowShell.agent.interaction.test.tsx -t "puzzle form checks mud points before creating a draft|match3d form checks mud points before creating a draft|bark battle form checks mud points before creating image assets"` 应断言弹窗出现、对应工作台仍在、玩法模板分类不再出现。
 - 关联：`src/components/platform-entry/PlatformEntryFlowShellImpl.tsx`、`src/components/rpg-entry/RpgEntryFlowShell.agent.interaction.test.tsx`、`docs/【玩法创作】平台入口与玩法链路-2026-05-15.md`。
 
+## 内嵌泥点确认弹窗必须自带平台主题作用域
+
+- 现象：拼图 / 抓大鹅统一创作页点击生成后，“确认消耗泥点”弹窗正文和按钮存在，但弹窗面板背景透明，只剩遮罩和文字。
+- 原因：`PlatformMudPointConfirmDialog` 作为二级确认常以 `portal={false}` 内嵌到工作台局部 DOM，局部节点不一定继承 `.platform-theme`；`platform-modal-shell` 依赖 `--platform-modal-fill` 等主题变量，变量缺失时面板底色解析为空。
+- 处理：共享泥点确认弹窗默认在 overlay 上带 `platform-theme platform-theme--<theme>`、`platform-modal-backdrop` 和实色遮罩，在 panel 上带 `platform-modal-shell platform-remap-surface`；单按钮状态弹窗也要有默认 light 主题，避免未来独立调用复现。
+- 验证：浏览器触发 `/creation/puzzle` 与 `/creation/match3d` 的泥点确认弹窗，检查 overlay 最近主题 class 存在、`--platform-modal-fill` 有值且面板为实底；聚焦测试覆盖默认 overlay / panel class。
+- 关联：`src/components/common/PlatformMudPointConfirmDialog.tsx`、`src/components/common/PlatformStatusDialog.tsx`、`src/components/unified-creation/workspaces/PuzzleCreationWorkspace.tsx`、`src/components/unified-creation/workspaces/Match3DCreationWorkspace.tsx`。
+
 ## 玩法入口分类字段缺失要前端兜底
 
 - 现象：平台创作入口初始化时，`platformEntryCreationTypes.ts` 直接对 `creationTypes[].categoryId` / `categoryLabel` 调 `trim()`，一旦后端旧数据、局部 mock 或异常返回里缺字段，整个创作页会在 `derivePlatformCreationTypes(...)` 里直接炸掉。
diff --git a/src/components/common/PlatformMudPointConfirmDialog.test.tsx b/src/components/common/PlatformMudPointConfirmDialog.test.tsx
index f9b21200..58984f1d 100644
--- a/src/components/common/PlatformMudPointConfirmDialog.test.tsx
+++ b/src/components/common/PlatformMudPointConfirmDialog.test.tsx
@@ -51,3 +51,27 @@ test('supports extra detail copy and close button override', () => {
   expect(within(dialog).getByText('本次会覆盖当前待确认素材。')).toBeTruthy();
   expect(screen.queryByRole('button', { name: '关闭' })).toBeNull();
 });
+
+test('applies the stronger default overlay and panel chrome', () => {
+  render(
+    <PlatformMudPointConfirmDialog
+      open
+      points={10}
+      onClose={() => {}}
+      onConfirm={() => {}}
+      portal={false}
+    />,
+  );
+
+  const dialog = screen.getByRole('dialog', { name: '确认消耗泥点' });
+  const overlay = dialog.parentElement as HTMLElement;
+
+  expect(overlay.className).toContain('platform-modal-backdrop');
+  expect(overlay.className).toContain('platform-theme--light');
+  expect(overlay.className).toContain('!bg-black/45');
+  expect(dialog.className).toContain('platform-modal-shell');
+  expect(dialog.className).toContain('max-w-xs');
+  expect(dialog.className).toContain(
+    'shadow-[0_24px_70px_rgba(15,23,42,0.22)]',
+  );
+});
diff --git a/src/components/common/PlatformMudPointConfirmDialog.tsx b/src/components/common/PlatformMudPointConfirmDialog.tsx
index 198ead2e..cbbb3918 100644
--- a/src/components/common/PlatformMudPointConfirmDialog.tsx
+++ b/src/components/common/PlatformMudPointConfirmDialog.tsx
@@ -1,5 +1,6 @@
 import type { ReactNode } from 'react';
 
+import { useAuthUi } from '../auth/AuthUiContext';
 import { UnifiedConfirmDialog } from './UnifiedConfirmDialog';
 
 type PlatformMudPointConfirmDialogProps = {
@@ -19,6 +20,14 @@ type PlatformMudPointConfirmDialogProps = {
   panelClassName?: string;
 };
 
+const DEFAULT_OVERLAY_CLASS_NAME = 'platform-modal-backdrop z-[80] !bg-black/45';
+const DEFAULT_PANEL_CLASS_NAME =
+  'platform-modal-shell platform-remap-surface max-w-xs rounded-[1.35rem] shadow-[0_24px_70px_rgba(15,23,42,0.22)]';
+
+function joinClassNames(...classNames: Array<string | undefined>) {
+  return classNames.filter(Boolean).join(' ');
+}
+
 /**
  * 平台泥点消耗确认弹窗。
  * 统一承接“确认消耗泥点 + 消耗 N 泥点”的标准确认壳层，业务侧只保留点数与确认动作。
@@ -39,6 +48,8 @@ export function PlatformMudPointConfirmDialog({
   overlayClassName,
   panelClassName,
 }: PlatformMudPointConfirmDialogProps) {
+  const resolvedPlatformTheme = useAuthUi()?.platformTheme ?? 'light';
+
   return (
     <UnifiedConfirmDialog
       open={open}
@@ -52,8 +63,12 @@ export function PlatformMudPointConfirmDialog({
       showCloseButton={showCloseButton}
       portal={portal}
       size={size}
-      overlayClassName={overlayClassName}
-      panelClassName={panelClassName}
+      overlayClassName={joinClassNames(
+        `platform-theme platform-theme--${resolvedPlatformTheme}`,
+        DEFAULT_OVERLAY_CLASS_NAME,
+        overlayClassName,
+      )}
+      panelClassName={joinClassNames(DEFAULT_PANEL_CLASS_NAME, panelClassName)}
     >
       <div className="space-y-2">
         <div className="font-semibold">消耗 {points} 泥点</div>
diff --git a/src/components/common/PlatformStatusDialog.test.tsx b/src/components/common/PlatformStatusDialog.test.tsx
index 0533b494..7e9b37b9 100644
--- a/src/components/common/PlatformStatusDialog.test.tsx
+++ b/src/components/common/PlatformStatusDialog.test.tsx
@@ -21,6 +21,7 @@ test('renders result state with description and primary action', () => {
   );
 
   const dialog = screen.getByRole('dialog', { name: '支付成功' });
+  const overlay = dialog.parentElement as HTMLElement;
   const badge = dialog.querySelector('.platform-icon-badge');
   const action = screen.getByRole('button', { name: '知道了' });
   const visibleDescription = dialog.querySelector(
@@ -28,6 +29,8 @@ test('renders result state with description and primary action', () => {
   );
 
   expect(dialog).toBeTruthy();
+  expect(overlay.className).toContain('platform-theme--light');
+  expect(overlay.className).toContain('platform-profile-modal-overlay');
   expect(visibleDescription?.textContent).toBe('账户状态已刷新');
   expect(badge?.className).toContain('text-[var(--platform-success-text)]');
   expect(action.className).toContain('platform-primary-button');
@@ -97,6 +100,27 @@ test('supports custom badge icon label and action button styling', () => {
   expect(action.className).toContain('bg-slate-950');
 });
 
+test('keeps default theme classes when callers customize the overlay', () => {
+  render(
+    <PlatformStatusDialog
+      status="error"
+      title="发布失败"
+      description="图片生成失败"
+      onClose={vi.fn()}
+      overlayClassName="bg-slate-950/58 custom-overlay"
+      action={{ label: '知道了', onClick: vi.fn(), surface: 'platform' }}
+    />,
+  );
+
+  const dialog = screen.getByRole('dialog', { name: '发布失败' });
+  const overlay = dialog.parentElement as HTMLElement;
+
+  expect(overlay.className).toContain('platform-theme--light');
+  expect(overlay.className).toContain('platform-profile-modal-overlay');
+  expect(overlay.className).toContain('bg-slate-950/58');
+  expect(overlay.className).toContain('custom-overlay');
+});
+
 test('supports header notice layout with body content and close button', () => {
   const onClose = vi.fn();
 
diff --git a/src/components/common/PlatformStatusDialog.tsx b/src/components/common/PlatformStatusDialog.tsx
index af74622d..7b95ef02 100644
--- a/src/components/common/PlatformStatusDialog.tsx
+++ b/src/components/common/PlatformStatusDialog.tsx
@@ -64,11 +64,15 @@ type PlatformStatusVisualConfig = {
 };
 
 const DEFAULT_OVERLAY_CLASS =
-  'platform-profile-modal-overlay bg-slate-950/72 backdrop-blur-xl';
+  'platform-theme platform-theme--light platform-profile-modal-overlay bg-slate-950/72 backdrop-blur-xl';
 const DEFAULT_PANEL_CLASS =
   'platform-remap-surface !max-w-sm rounded-[1.4rem]';
 const DEFAULT_BODY_CLASS = 'px-5 pb-5 pt-6 text-center';
 
+function joinClassNames(...classNames: Array<string | undefined>) {
+  return classNames.filter(Boolean).join(' ');
+}
+
 function getStatusVisualConfig(
   status: PlatformStatusDialogStatus,
 ): PlatformStatusVisualConfig {
@@ -119,7 +123,7 @@ export function PlatformStatusDialog({
   closeLabel,
   closeDisabled = false,
   zIndexClassName = 'z-[90]',
-  overlayClassName = DEFAULT_OVERLAY_CLASS,
+  overlayClassName,
   panelClassName = DEFAULT_PANEL_CLASS,
   bodyClassName = DEFAULT_BODY_CLASS,
   iconClassName,
@@ -144,7 +148,10 @@ export function PlatformStatusDialog({
       portal={false}
       size="sm"
       zIndexClassName={zIndexClassName}
-      overlayClassName={overlayClassName}
+      overlayClassName={joinClassNames(
+        DEFAULT_OVERLAY_CLASS,
+        overlayClassName,
+      )}
       panelClassName={panelClassName}
       bodyClassName={bodyClassName}
       >