diff --git a/src/components/game-distribution/CoCreationLineageStrip.tsx b/src/components/game-distribution/CoCreationLineageStrip.tsx
index 02b0f5970..0d1dec35e 100644
--- a/src/components/game-distribution/CoCreationLineageStrip.tsx
+++ b/src/components/game-distribution/CoCreationLineageStrip.tsx
@@ -1,17 +1,18 @@
+import { useEffect, useMemo, useRef, useState } from 'react';
+
 import type { GameDistributionLineageNode } from '../../services/gameDistributionClient';
-import {
-  coCreationAvatarInitial,
-  coCreationGenerationShortLabel,
-} from './coCreationCopy';
+import { LineageNodeContent } from './LineageNodeContent';
 
 /**
- * 血缘溯源条：横向完整链路「根原创 → 1 代 → 2 代 → … → 当前作品」。
+ * 详情页「共创」卡里的**血缘链**：竖向单链（根在最上、当前作品在最下）。
  *
- * 数据来自既有 `/games/{id}/lineage`（在详情页请求一次，按 `parentGameId` 上溯成链，
- * 不用整棵大树、也不新增接口）。每个节点显示作者字标 + 世代，点击跳该代作品详情。
+ * 复用族谱那一套：链条顺序来自 `collectLineageAncestorChain`（族谱布局模块的纯函数）、
+ * 节点内容来自 `LineageNodeContent`（与族谱画布同一个组件），这里只负责**嵌入态的排布**：
+ * 窄容器（~220–260px）里**只能纵向滚动**，横向裁掉（`overflow-x: hidden`），
+ * 初次进入与「当前作品 id 变化」时自动滚到底部，让当前游戏可见。
  *
- * 头像：`/lineage` 节点只带 `authorName`（没有头像字段），因此用姓名首字的圆形字标降级，
- * 不伪造头像图片；后端补字段后换成真实头像即可（结构不用改）。
+ * 为什么只画祖先链、不画整棵树：右栏只有 200 多像素宽，塞整棵树必然又挤成一片；
+ * 整棵树由既有的「查看创作族谱」入口负责（点击进入 `/games/lineage?id=<root>`）。
  */
 export function CoCreationLineageStrip({
   chain,
@@ -23,48 +24,104 @@ export function CoCreationLineageStrip({
   currentGameId: string;
   onOpenGameDetail: (gameId: string) => void;
 }) {
+  const scrollRef = useRef<HTMLDivElement>(null);
+  /** 上面还有几代没露出来（滚动位置之上还有内容时给「↑ 还有 N 代」提示）。 */
+  const [hiddenAboveCount, setHiddenAboveCount] = useState(0);
+
+  // 默认滚到底部（当前作品在最下），并在当前作品变化时重新滚到底。
+  useEffect(() => {
+    const element = scrollRef.current;
+    if (!element) return;
+    element.scrollTop = element.scrollHeight - element.clientHeight;
+    setHiddenAboveCount(0);
+  }, [currentGameId, chain.length]);
+
+  const handleScroll = () => {
+    const element = scrollRef.current;
+    if (!element) return;
+    const above = element.scrollTop;
+    const nodeHeight = element.scrollHeight / Math.max(chain.length, 1);
+    setHiddenAboveCount(Math.max(0, Math.round(above / Math.max(nodeHeight, 1))));
+  };
+
+  const ancestors = useMemo(() => chain.slice(0, -1), [chain]);
+  /** 主干：每代 playCount 最高者（与族谱页同一语义：主干链的导线加粗）。 */
+  const trunkGameIds = useMemo(() => {
+    const bestByGeneration = new Map<number, GameDistributionLineageNode>();
+    for (const node of chain) {
+      const current = bestByGeneration.get(node.generation);
+      if (!current || node.playCount > current.playCount) {
+        bestByGeneration.set(node.generation, node);
+      }
+    }
+    return new Set([...bestByGeneration.values()].map((node) => node.gameId));
+  }, [chain]);
   if (chain.length <= 1) return null;
 
   return (
-    <div className="co-creation-lineage" aria-label="血缘溯源">
-      {chain.map((node, index) => {
-        const isCurrent = node.gameId === currentGameId;
-        return (
-          <span key={node.gameId} className="co-creation-lineage__item">
-            {index > 0 ? (
-              <span className="co-creation-lineage__arrow" aria-hidden="true">
-                →
-              </span>
-            ) : null}
-            <button
-              type="button"
-              className={`co-creation-lineage__node${
-                isCurrent ? ' co-creation-lineage__node--current' : ''
-              }`}
-              aria-current={isCurrent ? 'true' : undefined}
-              aria-label={`${coCreationGenerationShortLabel(node.generation)}作品《${node.title}》· ${node.authorName?.trim() || '未署名作者'}`}
-              onClick={() => {
-                if (!isCurrent) onOpenGameDetail(node.gameId);
-              }}
-            >
-              <span className="co-creation-lineage__avatar" aria-hidden="true">
-                {coCreationAvatarInitial(node.authorName)}
-              </span>
-              <span className="co-creation-lineage__text">
-                <span className="co-creation-lineage__generation">
-                  {coCreationGenerationShortLabel(node.generation)}
-                </span>
-                <span className="co-creation-lineage__title">{node.title}</span>
-                <span className="co-creation-lineage__author">
-                  {node.authorName?.trim() || '未署名作者'}
-                </span>
-              </span>
-            </button>
-          </span>
-        );
-      })}
+    <div className="co-creation-chain">
+      <div
+        className="co-creation-chain__scroll"
+        ref={scrollRef}
+        onScroll={handleScroll}
+        aria-label="创作血缘链"
+        tabIndex={0}
+      >
+        {chain.map((node, index) => {
+          const isCurrent = node.gameId === currentGameId;
+          return (
+            <span key={node.gameId} className="co-creation-chain__row">
+              {index > 0 ? (
+                <span
+                  className={`co-creation-chain__connector${
+                    trunkGameIds.has(node.gameId) ? ' co-creation-chain__connector--trunk' : ''
+                  }`}
+                  aria-hidden="true"
+                />
+              ) : null}
+              <button
+                type="button"
+                className={`co-creation-chain__node${
+                  isCurrent ? ' co-creation-chain__node--current' : ''
+                }`}
+                aria-current={isCurrent ? 'true' : undefined}
+                aria-label={`${generationLabel(node.generation)}《${node.title}》· ${
+                  node.authorName?.trim() || '未署名作者'
+                }`}
+                onClick={() => {
+                  if (!isCurrent) onOpenGameDetail(node.gameId);
+                }}
+              >
+                <LineageNodeContent
+                  layout="inline"
+                  title={node.title}
+                  authorName={node.authorName ?? null}
+                  generation={node.generation}
+                  coverObjectKey={node.coverObjectKey}
+                  isAnchor={isCurrent}
+                  isTrunk={trunkGameIds.has(node.gameId)}
+                />
+              </button>
+            </span>
+          );
+        })}
+      </div>
+      {hiddenAboveCount > 0 ? (
+        <span className="co-creation-chain__notice" role="status">
+          ↑ 还有 {hiddenAboveCount} 代（共 {chain.length} 代）
+        </span>
+      ) : null}
+      {ancestors.length > 0 ? (
+        <span className="co-creation-chain__legend">
+          根在最上、当前作品在最下，可纵向滚动
+        </span>
+      ) : null}
     </div>
   );
 }
 
+function generationLabel(generation: number) {
+  return generation <= 0 ? '0 代原创' : `${generation} 代`;
+}
+
 export default CoCreationLineageStrip;
diff --git a/src/components/game-distribution/GameDistributionPages.test.tsx b/src/components/game-distribution/GameDistributionPages.test.tsx
index 7177d1034..0cada2f58 100644
--- a/src/components/game-distribution/GameDistributionPages.test.tsx
+++ b/src/components/game-distribution/GameDistributionPages.test.tsx
@@ -2353,6 +2353,38 @@ describe('GameDetailPage 共创主题入口', () => {
   });
 });
 
+/** 4 节点、3 代的血缘链数据集（根 → 1 代 → 2 代 → 当前），供详情页血缘链用例共用。 */
+function buildChainDataset() {
+  return {
+    rootGameId: 'game-root',
+    root: null,
+    nodes: [
+      createLineageNode({
+        gameId: 'game-root',
+        title: '根原创',
+        authorName: '根作者',
+        generation: 0,
+        parentGameId: null,
+      }),
+      createLineageNode({
+        gameId: 'game-mid',
+        title: '一代作品',
+        authorName: '一代作者',
+        generation: 1,
+        parentGameId: 'game-root',
+      }),
+      createLineageNode({
+        gameId: 'game-current',
+        title: '当前作品',
+        authorName: '当前作者',
+        generation: 2,
+        parentGameId: 'game-mid',
+      }),
+    ],
+    truncated: false,
+  };
+}
+
 /** 节点卡片上的主行动作按钮（打开详情）与它的卡片容器：多个 describe 共用。 */
 const openButton = (title: string) =>
   screen.getByRole('button', { name: `打开《${title}》详情` });
@@ -2980,21 +3012,160 @@ describe('GameDetailPage 共创模块（文档对齐）', () => {
       />,
     );
 
-    const strip = await screen.findByLabelText('血缘溯源');
+    const strip = await screen.findByLabelText('创作血缘链');
     expect(strip.textContent).toContain('根原创');
     expect(strip.textContent).toContain('一代作品');
     expect(strip.textContent).toContain('当前作品');
-    // 头像位是姓名首字（链路节点没有头像字段，不伪造头像图）。
-    expect(strip.textContent).toContain('根');
-    // 当前作品标记为 current 且点击不跳转；点中间一代跳该作品。
+    // 顺序必须是 根 → 1 代 → 当前（DOM 顺序）。
+    const chainText = strip.textContent ?? '';
+    expect(chainText.indexOf('根原创')).toBeLessThan(
+      chainText.indexOf('一代作品'),
+    );
+    expect(chainText.indexOf('一代作品')).toBeLessThan(
+      chainText.indexOf('当前作品'),
+    );
+    // 当前作品有明确标记（aria-current + current 类）。
+    const currentNode = strip.querySelector(
+      '.co-creation-chain__node--current',
+    ) as HTMLElement;
+    expect(currentNode.getAttribute('aria-current')).toBe('true');
+    expect(currentNode.textContent).toContain('当前作品');
+    // 点击根节点跳该作品；点当前作品不跳（本就是当前页）。
     fireEvent.click(
-      screen.getByRole('button', { name: /0 代作品《根原创》/u }),
+      screen.getByRole('button', { name: /0 代原创《根原创》/u }),
     );
     expect(onOpenGameDetail).toHaveBeenCalledWith('game-root');
-    fireEvent.click(
-      screen.getByRole('button', { name: /2 代作品《当前作品》/u }),
-    );
+    fireEvent.click(currentNode);
     expect(onOpenGameDetail).toHaveBeenCalledTimes(1);
+    // 节点是真实 button：键盘可达（Tab 聚焦 + Enter 原生激活）。
+    const rootNode = screen.getByRole('button', {
+      name: /0 代原创《根原创》/u,
+    });
+    expect(rootNode.tagName).toBe('BUTTON');
+    rootNode.focus();
+    expect(document.activeElement).toBe(rootNode);
+  });
+
+  it('血缘链只允许纵向滚动并默认滚到底部（当前作品可见）', async () => {
+    // jsdom 不计算布局：把可滚动尺寸打桩成「内容 400 / 可视 100」，才能断言「滚到底」。
+    const scrollHeightDescriptor = Object.getOwnPropertyDescriptor(
+      Element.prototype,
+      'scrollHeight',
+    );
+    const clientHeightDescriptor = Object.getOwnPropertyDescriptor(
+      Element.prototype,
+      'clientHeight',
+    );
+    Object.defineProperty(Element.prototype, 'scrollHeight', {
+      configurable: true,
+      get: () => 400,
+    });
+    Object.defineProperty(Element.prototype, 'clientHeight', {
+      configurable: true,
+      get: () => 100,
+    });
+    try {
+      getGameMock.mockResolvedValueOnce(createGame({ id: 'game-current' }));
+      getGameLineageMock.mockResolvedValueOnce(buildChainDataset());
+      const first = render(
+        <GameDetailPage
+          gameId="game-current"
+          onBack={vi.fn()}
+          onPlay={vi.fn()}
+          onOpenGameDetail={vi.fn()}
+        />,
+      );
+      const scroll = await screen.findByLabelText('创作血缘链');
+      // 默认滚到底：scrollTop = scrollHeight - clientHeight = 400 - 100。
+      await waitFor(() => expect(scroll.scrollTop).toBe(300));
+      // 只允许纵向滚动：容器类名对应的 CSS 里 overflow-x 是 hidden（另有 CSS 防退化断言）。
+      expect(scroll.className).toContain('co-creation-chain__scroll');
+      first.unmount();
+
+      // 当前作品 id 变化 → 重新滚到底（而不是停在之前的位置）。
+      getGameMock.mockResolvedValueOnce(createGame({ id: 'game-mid' }));
+      getGameLineageMock.mockResolvedValueOnce(buildChainDataset());
+      render(
+        <GameDetailPage
+          gameId="game-mid"
+          onBack={vi.fn()}
+          onPlay={vi.fn()}
+          onOpenGameDetail={vi.fn()}
+        />,
+      );
+      const next = await screen.findByLabelText('创作血缘链');
+      await waitFor(() => expect(next.scrollTop).toBe(300));
+    } finally {
+      if (scrollHeightDescriptor) {
+        Object.defineProperty(
+          Element.prototype,
+          'scrollHeight',
+          scrollHeightDescriptor,
+        );
+      }
+      if (clientHeightDescriptor) {
+        Object.defineProperty(
+          Element.prototype,
+          'clientHeight',
+          clientHeightDescriptor,
+        );
+      }
+    }
+  });
+
+  it('血缘链节点卡片：标题不逐字换行、容器不横向滚动（防退化）', async () => {
+    const css = await import('node:fs').then((fs) =>
+      fs.readFileSync(
+        'src/components/game-distribution/gameDistribution.css',
+        'utf8',
+      ),
+    );
+    // 防退化：这几条是「窄容器里不被挤成竖排」的根因，改坏了必须变红。
+    expect(css).toContain('-webkit-line-clamp: 2');
+    expect(css).toContain('overflow-x: hidden');
+    expect(css).toContain('min-width: 0');
+    expect(css).toContain('text-overflow: ellipsis');
+    expect(css).toContain('.game-lineage-node__content--inline');
+
+    getGameMock.mockResolvedValueOnce(createGame({ id: 'game-current' }));
+    getGameLineageMock.mockResolvedValueOnce(buildChainDataset());
+    render(
+      <GameDetailPage
+        gameId="game-current"
+        onBack={vi.fn()}
+        onPlay={vi.fn()}
+        onOpenGameDetail={vi.fn()}
+      />,
+    );
+
+    const scroll = await screen.findByLabelText('创作血缘链');
+    expect(scroll.className).toContain('co-creation-chain__scroll');
+    // 横向不溢出（jsdom 里两者均为 0，断言的是「没有设置横向滚动」这一契约）。
+    expect(scroll.scrollWidth <= scroll.clientWidth).toBe(true);
+    const title = scroll.querySelector('.game-lineage-node__title');
+    expect(title?.className).toContain('game-lineage-node__title');
+    expect(title?.textContent).toBe('根原创');
+  });
+
+  it('节点封面用横版小缩略图，链节点是矮而宽的横向排布', async () => {
+    getGameMock.mockResolvedValueOnce(createGame({ id: 'game-current' }));
+    getGameLineageMock.mockResolvedValueOnce(buildChainDataset());
+    render(
+      <GameDetailPage
+        gameId="game-current"
+        onBack={vi.fn()}
+        onPlay={vi.fn()}
+        onOpenGameDetail={vi.fn()}
+      />,
+    );
+
+    const scroll = await screen.findByLabelText('创作血缘链');
+    expect(
+      scroll.querySelectorAll('.game-lineage-node__content--inline').length,
+    ).toBeGreaterThan(0);
+    expect(scroll.querySelectorAll('.co-creation-chain__connector').length).toBe(
+      2,
+    );
   });
 
   it('热门衍生栏按 playCount 倒序取前 5 个并可在点击后进入作品', async () => {
diff --git a/src/components/game-distribution/GameLineagePage.tsx b/src/components/game-distribution/GameLineagePage.tsx
index 3c049873d..2afc4c560 100644
--- a/src/components/game-distribution/GameLineagePage.tsx
+++ b/src/components/game-distribution/GameLineagePage.tsx
@@ -25,17 +25,16 @@ import { CopyFeedbackButton } from '../common/CopyFeedbackButton';
 import { PlatformEmptyState } from '../common/PlatformEmptyState';
 import { PlatformStatusMessage } from '../common/PlatformStatusMessage';
 import { useCopyFeedback } from '../common/useCopyFeedback';
-import { GameCover } from './GameCover';
 import { useIsMobileViewport } from './gameDistributionGuards';
 import {
   FORK_LAUNCH_FALLBACK_DELAY_MS,
   openForkProtocol,
 } from './gameForkProtocol';
+import { LineageNodeContent } from './LineageNodeContent';
 import {
   buildLineageTreeLayout,
   collectLineageHighlight,
   generationAxisLabel,
-  LINEAGE_COVER_ASPECT,
   type LineageLayoutNode,
 } from './lineageTreeLayout';
 
@@ -109,15 +108,6 @@ function LineageTreeNodeCard({
     ? `原作品已不可用 · ${generationAxisLabel(generation)}`
     : `${generationAxisLabel(generation)}作品《${displayTitle}》· ${authorLabel}`;
   // 父作品不可用的占位节点只能聚焦（不可点进详情，也没有 Fork 动作）。
-  // 封面：族谱节点只带 `coverObjectKey`，没有完整游戏行；`GameCover` 只读
-  // title / coverColor / icon / coverObjectKey 四个字段，这里用与 `game_payload` 相同的
-  // 兜底色与图标补上，其余字段不参与渲染——不做逐节点详情请求。
-  const coverGame = {
-    title: displayTitle,
-    coverColor: '#F3E4D0',
-    icon: '🎮',
-    coverObjectKey: layoutNode.coverObjectKey,
-  } as unknown as GameDistributionGame;
 
   return (
     <div
@@ -182,38 +172,16 @@ function LineageTreeNodeCard({
               onOpenDetail(gameId);
             }}
           >
-            <span
-              className="game-lineage-node__cover"
-              // 16:9 横版（与发布面板封面预览同一约定）：容器比例由常量给出，CSS 不再另写一套。
-              style={{ aspectRatio: LINEAGE_COVER_ASPECT }}
-            >
-              <GameCover
-                game={coverGame}
-                objectKey={layoutNode.coverObjectKey}
-              />
-              <span className="game-lineage-node__badge">
-                {generationAxisLabel(generation)}
-              </span>
-              {layoutNode.isTrunk ? (
-                <span
-                  className="game-lineage-node__trunk"
-                  title="该代热度最高的版本"
-                >
-                  主干
-                </span>
-              ) : null}
-              {isAnchor ? (
-                <span className="game-lineage-node__anchor">当前作品</span>
-              ) : null}
-            </span>
-            <span className="game-lineage-node__strip">
-              <span className="game-lineage-node__title">{displayTitle}</span>
-              {compact ? null : (
-                <span className="game-lineage-node__meta">
-                  <span>{authorLabel}</span>
-                </span>
-              )}
-            </span>
+            <LineageNodeContent
+              layout="stacked"
+              title={layoutNode.title}
+              authorName={layoutNode.authorName}
+              generation={generation}
+              coverObjectKey={layoutNode.coverObjectKey}
+              isAnchor={isAnchor}
+              isStub={isStub}
+              isTrunk={layoutNode.isTrunk}
+            />
           </button>
           <span className="game-lineage-node__actions">
             <button
diff --git a/src/components/game-distribution/LineageNodeContent.tsx b/src/components/game-distribution/LineageNodeContent.tsx
new file mode 100644
index 000000000..395ad5c77
--- /dev/null
+++ b/src/components/game-distribution/LineageNodeContent.tsx
@@ -0,0 +1,75 @@
+import type { GameDistributionGame } from '../../services/gameDistributionClient';
+import { GameCover } from './GameCover';
+import { generationAxisLabel } from './lineageTreeLayout';
+
+/**
+ * 族谱节点卡片的**内容**（封面 + 代际角标 + 标题 + 作者），族谱画布与详情页血缘链共用。
+ *
+ * 抽出来是为了只有一套「封面色块 / 角标 / 省略规则」：详情页的血缘链曾经自己写过一份窄卡片，
+ * 结果在 ~230px 的右栏里把标题挤成逐字换行。现在两处都用这里的规则：
+ * - 标题容器 `min-width: 0`（flex 子项默认不收缩的经典坑）+ 2 行 line-clamp + ellipsis；
+ * - `layout="stacked"`：画布卡片，封面在上、信息条在下；
+ * - `layout="inline"`：血缘链节点，封面在左、文字在右，**矮而宽**，绝不允许逐字换行。
+ */
+export function LineageNodeContent({
+  title,
+  authorName,
+  generation,
+  coverObjectKey,
+  layout,
+  isAnchor = false,
+  isStub = false,
+  isTrunk = false,
+}: {
+  title: string | null;
+  authorName: string | null;
+  generation: number;
+  coverObjectKey?: string | null;
+  layout: 'stacked' | 'inline';
+  isAnchor?: boolean;
+  isStub?: boolean;
+  isTrunk?: boolean;
+}) {
+  const displayTitle = isStub ? '原作品已不可用' : (title ?? '未命名作品');
+  const authorLabel = isStub
+    ? '标题与作者名不对外展示'
+    : (authorName ?? '').trim() || '未署名作者';
+  /** `GameCover` 只读 title / coverColor / icon / coverObjectKey；族谱节点没有完整游戏行。 */
+  const coverGame = {
+    title: displayTitle,
+    coverColor: '#F3E4D0',
+    icon: '🎮',
+    coverObjectKey,
+  } as unknown as GameDistributionGame;
+
+  return (
+    <span
+      className={`game-lineage-node__content game-lineage-node__content--${layout}`}
+    >
+      <span className="game-lineage-node__cover">
+        <GameCover game={coverGame} objectKey={coverObjectKey} />
+        <span className="game-lineage-node__badge">
+          {generationAxisLabel(generation)}
+        </span>
+        {isTrunk ? (
+          <span className="game-lineage-node__trunk" title="该代热度最高的版本">
+            主干
+          </span>
+        ) : null}
+        {isAnchor ? (
+          <span className="game-lineage-node__anchor">当前作品</span>
+        ) : null}
+      </span>
+      <span className="game-lineage-node__text">
+        <span className="game-lineage-node__title">{displayTitle}</span>
+        {layout === 'stacked' ? null : (
+          <span className="game-lineage-node__meta">
+            <span className="game-lineage-node__author">{authorLabel}</span>
+          </span>
+        )}
+      </span>
+    </span>
+  );
+}
+
+export default LineageNodeContent;
diff --git a/src/components/game-distribution/gameDistribution.css b/src/components/game-distribution/gameDistribution.css
index dfaeb8188..40da09d52 100644
--- a/src/components/game-distribution/gameDistribution.css
+++ b/src/components/game-distribution/gameDistribution.css
@@ -764,72 +764,70 @@
   color: var(--platform-text-soft);
   cursor: not-allowed;
 }
-/* 血缘溯源条：横向链路，可横向滚动不撑破卡片。 */
-.game-detail-info-card .co-creation-lineage {
+/*
+ * 详情页共创卡里的血缘链（竖向单链）：根在最上、当前作品在最下。
+ * 容器窄（右栏 ~220–260px）→ **只允许纵向滚动**，横向裁掉，避免被挤成逐字换行；
+ * 首屏与当前作品变化时由组件滚到底部（当前游戏可见）。
+ */
+.game-detail-info-card .co-creation-chain {
   display: flex;
-  align-items: stretch;
-  gap: 0.2rem;
-  max-width: 100%;
-  overflow-x: auto;
-  padding-bottom: 0.2rem;
+  flex-direction: column;
+  gap: 0.25rem;
+  min-width: 0;
 }
-.game-detail-info-card .co-creation-lineage__item {
-  display: inline-flex;
-  align-items: center;
-  gap: 0.2rem;
-}
-.game-detail-info-card .co-creation-lineage__arrow {
-  color: var(--platform-text-soft);
-  font-size: 0.8rem;
-}
-.game-detail-info-card .co-creation-lineage__node {
-  display: inline-flex;
-  align-items: center;
-  gap: 0.35rem;
+.game-detail-info-card .co-creation-chain__scroll {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+  max-height: 20rem;
+  overflow-y: auto;
+  overflow-x: hidden;
+  padding-right: 0.15rem;
   border: 1px solid var(--platform-surface-border);
   border-radius: 0.6rem;
-  padding: 0.3rem 0.45rem;
-  background: var(--platform-surface, #fff);
-  color: var(--platform-text-base);
+  background: var(--platform-surface-muted, rgba(104, 54, 36, 0.03));
+}
+.game-detail-info-card .co-creation-chain__row {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+}
+/* 父→子短竖线：主干链节的连线加粗、用主题色（与桌面「主干线粗实线」同语义）。 */
+.game-detail-info-card .co-creation-chain__connector {
+  width: 2px;
+  height: 0.7rem;
+  margin-left: 1.6rem;
+  background: var(--platform-surface-border);
+}
+.game-detail-info-card .co-creation-chain__connector--trunk {
+  width: 4px;
+  background: var(--platform-accent-strong);
+}
+.game-detail-info-card .co-creation-chain__node {
+  display: block;
+  width: 100%;
+  min-width: 0;
+  border: 1px solid transparent;
+  border-radius: 0.5rem;
+  padding: 0.3rem 0.4rem;
+  background: transparent;
+  color: inherit;
   font: inherit;
   text-align: left;
   cursor: pointer;
 }
-.game-detail-info-card .co-creation-lineage__node--current {
+.game-detail-info-card .co-creation-chain__node:hover {
+  background: rgba(199, 101, 61, 0.08);
+}
+.game-detail-info-card .co-creation-chain__node--current {
   border-color: var(--platform-accent-strong);
-  box-shadow: 0 0 0 2px rgba(199, 101, 61, 0.16);
-  cursor: default;
+  background: rgba(199, 101, 61, 0.12);
 }
-.game-detail-info-card .co-creation-lineage__avatar {
-  display: grid;
-  flex: none;
-  width: 1.6rem;
-  height: 1.6rem;
-  place-items: center;
-  border-radius: 50%;
-  background: rgba(199, 101, 61, 0.18);
-  color: var(--platform-accent-strong);
-  font-size: 0.72rem;
-  font-weight: 700;
-}
-.game-detail-info-card .co-creation-lineage__text {
-  display: flex;
-  flex-direction: column;
-  min-width: 0;
-  font-size: 0.7rem;
-  line-height: 1.3;
-}
-.game-detail-info-card .co-creation-lineage__generation {
-  color: var(--platform-accent-strong);
-  font-weight: 700;
-}
-.game-detail-info-card .co-creation-lineage__title {
-  color: var(--platform-text-strong);
-  font-weight: 600;
-  overflow-wrap: anywhere;
-}
-.game-detail-info-card .co-creation-lineage__author {
+.game-detail-info-card .co-creation-chain__notice,
+.game-detail-info-card .co-creation-chain__legend {
   color: var(--platform-text-soft);
+  font-size: 0.7rem;
+  overflow-wrap: anywhere;
 }
 /* 热门衍生栏：横向卡片。 */
 .game-detail-info-card .co-creation-hot {
@@ -1288,6 +1286,68 @@
   font-weight: 700;
   overflow-wrap: anywhere;
 }
+/* 链节点与画布卡片共用的内容布局（LineageNodeContent）。 */
+.game-lineage-node__content {
+  display: flex;
+  min-width: 0;
+}
+.game-lineage-node__content--stacked {
+  flex-direction: column;
+  gap: 0;
+  width: 100%;
+}
+.game-lineage-node__content--inline {
+  flex-direction: row;
+  align-items: center;
+  gap: 0.45rem;
+  width: 100%;
+  min-width: 0;
+  padding: 0.15rem 0;
+}
+.game-lineage-node__text {
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+  min-width: 0;
+  flex: 1 1 auto;
+}
+/* 防逐字换行：min-width:0 让 flex 子项可收缩，标题 2 行截断（line-clamp）+ 省略号。 */
+.game-lineage-node__title {
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  overflow-wrap: anywhere;
+  word-break: normal;
+}
+.game-lineage-node__meta {
+  display: flex;
+  min-width: 0;
+  gap: 0.3rem;
+  overflow: hidden;
+}
+.game-lineage-node__author {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+/* 链节点：横版小缩略图（64×36），矮而宽，触控目标 ≥44px。 */
+.game-lineage-node__content--inline .game-lineage-node__cover {
+  flex: 0 0 auto;
+  width: 4rem;
+  aspect-ratio: 16 / 9;
+  border-radius: 0.35rem;
+}
+.game-lineage-node__content--inline .game-lineage-node__badge,
+.game-lineage-node__content--inline .game-lineage-node__anchor {
+  font-size: 0.6rem;
+  padding: 0.05rem 0.35rem;
+}
+.game-detail-info-card .co-creation-chain__node {
+  min-height: 2.75rem;
+}
+
 /* 卡片主体 = 选中；标题/封面 = 打开详情。封面做主视觉（大图 + 圆角 + 轻阴影）。 */
 .game-lineage-node {
   padding: 0;