diff --git a/docs/project-memory/plans/【里程碑】游戏分发目录详情与在线游玩-2026-09-18.md b/docs/project-memory/plans/【里程碑】游戏分发目录详情与在线游玩-2026-09-18.md
index ca79346e7..015600f54 100644
--- a/docs/project-memory/plans/【里程碑】游戏分发目录详情与在线游玩-2026-09-18.md
+++ b/docs/project-memory/plans/【里程碑】游戏分发目录详情与在线游玩-2026-09-18.md
@@ -321,7 +321,9 @@
 
 **生产环境**（`genarrative.world`）同一时刻 `/api/game-distribution/games` 返回 **0 条**：说明当前生产还没有任何已发布的游戏，条目 ④「真实环境整链路」需要在生产发布一个作品后再跑。也就是说此刻能拿到的真实环境证据是「dev 部署的公开读路径 + 发行隔离」，写路径与审核链路的真实环境验收仍需生产账号。
 
-## 网页侧交互修正（2026-09-30）
+## 网页侧两处交互修正（2026-09-30）
 
 - **广场首屏「立即试玩」不再替用户选中作品**：`src/components/game-distribution/GameGalleryPage.tsx` 原来是 `onClick={() => featuredGame && openDetail(featuredGame.id)}`，点一下等于直接打开第一款游戏的详情。现在按钮只把列表滚进视野（按平台页签面板计算相对偏移，`scrollTo({ behavior: 'smooth' })`，无 `scrollTo` 时退化成直接赋值），不再触发 `onOpenDetail`；`featuredGame` 派生随之退役。回归用例 `GameDistributionPages.test.tsx`「首屏「立即试玩」滚动到列表，而不是打开第一款游戏详情」断言 `onOpenDetail` 未被调用且滚动落在页签面板上。
-- 验证：`npx vitest run src/components/game-distribution/GameDistributionPages.test.tsx`（21 passed）、`npm run typecheck`、`npx eslint`、`npm run check:encoding`、`git diff --check` 通过。视觉与真机走查仍需人工/截图评审（沿用阶段 C 第 8 条未取证口径）。
+- **游玩页不再可滚**：移动端此前是整页可滚的半屏播放器。原因是面板仍是 `overflow-auto`，而播放器用 `min-height: calc(100dvh - 8rem)` 撑高页面。现在 `PlatformEntryActiveFlowShell.tsx` 在 `game-play` 舞台给页签容器加 `platform-tab-panel--game-play`（不滚动、去掉多余内边距），`.game-play-page` 改为 `height: 100%; min-height: 0`，播放器 `flex: 1; min-height: 0` 撑满剩余高度；矮视口（`max-height: 26rem`，横屏手机）另给启动面板一套压扁布局，兜底只在极端高度下发生在启动卡片内部，页面与面板本身始终不滚动。回归用例 `PlatformEntryActiveFlowShell.test.tsx`「游玩舞台的页签容器不滚动」「游戏广场等舞台仍保持页签容器滚动」双向锁定。
+- 真机口径的守卫补在现役 E2E 里：`scripts/check-game-distribution-web-e2e.mjs` 的移动端段新增「移动端游玩页不可滚动（面板与整页都不溢出）」，断言 `.platform-tab-panel` 的 `overflow-y` 为 `hidden` 且面板与整页都不溢出（该脚本需真实本地栈，未在本轮执行）。
+- 验证：`npx vitest run src/components/game-distribution/GameDistributionPages.test.tsx`（21 passed）、`npx vitest run src/components/platform-entry/PlatformEntryActiveFlowShell.test.tsx`（20 passed）、`npm run typecheck`、`npx eslint`（四个改动文件）、`npm run check:encoding`、`git diff --check` 全部通过。视觉与真机横竖屏走查仍需人工/截图评审（沿用阶段 C 第 8 条未取证口径）。
diff --git a/scripts/check-game-distribution-web-e2e.mjs b/scripts/check-game-distribution-web-e2e.mjs
index 60ba8f326..73a322544 100644
--- a/scripts/check-game-distribution-web-e2e.mjs
+++ b/scripts/check-game-distribution-web-e2e.mjs
@@ -522,6 +522,23 @@ async function main() {
       mobileStartDisabled && rotationHint,
       `startDisabled=${mobileStartDisabled} rotationHint=${rotationHint}`,
     );
+    // 游玩页是固定画布：面板必须是 overflow:hidden 且不溢出，整页也不能出现滚动条。
+    const playScroll = await mobilePage.evaluate(() => {
+      const panel = document.querySelector('.platform-tab-panel');
+      return {
+        documentOverflow:
+          document.documentElement.scrollHeight - window.innerHeight,
+        panelOverflow: panel ? panel.scrollHeight - panel.clientHeight : 0,
+        panelOverflowY: panel ? getComputedStyle(panel).overflowY : 'missing',
+      };
+    });
+    check(
+      '移动端游玩页不可滚动（面板与整页都不溢出）',
+      playScroll.documentOverflow <= 1 &&
+        playScroll.panelOverflow <= 1 &&
+        playScroll.panelOverflowY === 'hidden',
+      JSON.stringify(playScroll),
+    );
     await mobile.close();
     await context.close();
   } finally {
diff --git a/src/components/game-distribution/gameDistribution.css b/src/components/game-distribution/gameDistribution.css
index c24e193f5..dad457374 100644
--- a/src/components/game-distribution/gameDistribution.css
+++ b/src/components/game-distribution/gameDistribution.css
@@ -494,7 +494,9 @@
   display: flex;
   flex-direction: column;
   gap: 0.9rem;
-  min-height: 100%;
+  /* 游玩页是固定画布：撑满面板而不是撑高面板，页面本身永不滚动。 */
+  height: 100%;
+  min-height: 0;
   padding: clamp(0.7rem, 1.8vw, 1.5rem);
 }
 .game-play-toolbar {
@@ -536,8 +538,8 @@
 }
 .game-player-shell {
   position: relative;
-  flex: 1;
-  min-height: min(72vh, 48rem);
+  flex: 1 1 auto;
+  min-height: 0;
   overflow: hidden;
   border: 1px solid rgba(199, 101, 61, 0.24);
   border-radius: 1.5rem;
@@ -581,7 +583,7 @@
   display: block;
   width: 100%;
   height: 100%;
-  min-height: min(72vh, 48rem);
+  min-height: 0;
   border: 0;
   opacity: 0;
   transition: opacity 220ms ease;
@@ -716,9 +718,34 @@
   .game-play-toolbar__actions .game-play-device-hint {
     display: none;
   }
-  .game-player-shell,
-  .game-player-frame {
-    min-height: calc(100dvh - 8rem);
+}
+
+/*
+ * 矮视口（横屏手机）里播放器只剩很小的高度，压扁启动面板保证
+ * 「开始游戏」可达；页面依旧不滚动，只有这一块在极端情况下内部兜底。
+ */
+@media (max-height: 26rem) {
+  .game-player-launch {
+    grid-template-columns: minmax(0, 1fr);
+    align-content: center;
+    gap: 0.5rem;
+    padding: 0.75rem 1rem;
+    text-align: center;
+    overflow-y: auto;
+  }
+  .game-player-launch .game-cover {
+    display: none;
+  }
+  .game-player-launch__copy p {
+    display: -webkit-box;
+    margin: 0.25rem 0 0.6rem;
+    overflow: hidden;
+    -webkit-box-orient: vertical;
+    -webkit-line-clamp: 2;
+  }
+  .game-player-loading,
+  .game-player-timeout {
+    font-size: 0.8rem;
   }
 }
 
diff --git a/src/components/platform-entry/PlatformEntryActiveFlowShell.test.tsx b/src/components/platform-entry/PlatformEntryActiveFlowShell.test.tsx
index 92c5cbd8f..68cec511c 100644
--- a/src/components/platform-entry/PlatformEntryActiveFlowShell.test.tsx
+++ b/src/components/platform-entry/PlatformEntryActiveFlowShell.test.tsx
@@ -898,6 +898,35 @@ describe('游戏发布灰度入口', () => {
     );
   });
 
+  it('游玩舞台的页签容器不滚动', async () => {
+    gameDistributionMock.getGame.mockResolvedValue(null);
+
+    const { container } = render(
+      <StatefulPlatformEntryFlowShell initialStage="game-play" />,
+    );
+
+    const panel = container.querySelector('.platform-tab-panel');
+    expect(panel?.classList.contains('platform-tab-panel--game-play')).toBe(
+      true,
+    );
+    expect(panel?.className).not.toContain('overflow-auto');
+  });
+
+  it('游戏广场等舞台仍保持页签容器滚动', async () => {
+    gameDistributionMock.listGames.mockResolvedValue([]);
+
+    const { container } = render(
+      <StatefulPlatformEntryFlowShell initialStage="games" />,
+    );
+    expect(await screen.findByText('游戏广场')).toBeTruthy();
+
+    const panel = container.querySelector('.platform-tab-panel');
+    expect(panel?.classList.contains('platform-tab-panel--game-play')).toBe(
+      false,
+    );
+    expect(panel?.className).toContain('overflow-auto');
+  });
+
   it('灰度命中时广场展示发布入口', async () => {
     loginAsAuthor();
     gameDistributionMock.listGames.mockResolvedValue([]);
diff --git a/src/components/platform-entry/PlatformEntryActiveFlowShell.tsx b/src/components/platform-entry/PlatformEntryActiveFlowShell.tsx
index c5029d2e0..6a4f6ba7d 100644
--- a/src/components/platform-entry/PlatformEntryActiveFlowShell.tsx
+++ b/src/components/platform-entry/PlatformEntryActiveFlowShell.tsx
@@ -540,6 +540,11 @@ export function PlatformEntryFlowShellImpl({
     selectionStage === 'game-play' ||
     selectionStage === 'game-mine' ||
     selectionStage === 'game-publish';
+  /**
+   * 游玩页自己撑满剩余高度，面板不能再滚动，否则移动端会出现整页可滚的
+   * 半屏播放器；其余舞台继续沿用面板滚动。
+   */
+  const isGamePlayStage = selectionStage === 'game-play';
   const gameSearchParams = new URLSearchParams(
     typeof window === 'undefined' ? '' : window.location.search,
   );
@@ -717,7 +722,7 @@ export function PlatformEntryFlowShellImpl({
 
               <main
                 id={isCreationStage ? 'platform-tab-panel-create' : undefined}
-                className={`platform-tab-panel min-h-0 min-w-0 flex-1 overflow-auto ${isCreationStage || isProfileStage ? '' : 'px-3 py-4 sm:px-6 sm:py-6'}`}
+                className={`platform-tab-panel min-h-0 min-w-0 flex-1 ${isGamePlayStage ? 'platform-tab-panel--game-play' : 'overflow-auto'} ${isCreationStage || isProfileStage || isGamePlayStage ? '' : 'px-3 py-4 sm:px-6 sm:py-6'}`}
               >
                 {isProfileStage ? (
                   <PlatformActiveProfileView
diff --git a/src/index.css b/src/index.css
index db33eca67..6c37aff9f 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1176,6 +1176,12 @@ html[data-mobile-keyboard-open='true'] .platform-mobile-bottom-dock {
   padding-right: 0.25rem;
 }
 
+/* 游玩页是固定画布：面板不滚动，播放器撑满剩余高度，移动端也不会整页可滚。 */
+.platform-tab-panel--game-play {
+  overflow: hidden;
+  padding-right: 0;
+}
+
 .platform-tab-panel--hidden {
   display: none;
 }