diff --git a/.ua/backlog.json b/.ua/backlog.json
index 30a7dee..7910c8b 100644
--- a/.ua/backlog.json
+++ b/.ua/backlog.json
@@ -703,5 +703,7 @@
     }
   ,
     { "id": "g43", "title": "select/menu/popover/image 的 Esc 接入统一弹层栈", "motivation": "四个弹层组件各自监听 document 的 Esc：多层叠加（如 popover 内再开 image 预览）时一次 Esc 全部关闭，与 modal/drawer 的 pushOverlay 栈行为不一致", "acceptance": "四个组件展开期入 Esc 栈、收起即释放；多层叠加时 Esc 后进先出逐层关闭；焦点归还触发器；npm run check 全绿", "status": "done", "notes": "自补：一致性修复；复用 overlay.ts 的 pushOverlay 栈" }
+  ,
+    { "id": "g44", "title": "accordion 标题行方向键导航", "motivation": "标题是原生 button 只有 Enter/Space，行间移动要靠 Tab 逐个跳，与 tabs/tree 的 ↑↓/Home/End 键盘约定不一致", "acceptance": "↑↓ 在标题行间环形移动、Home/End 首尾直达，均跳过禁用行；焦点不在标题行不拦截；npm run check 全绿", "status": "done", "notes": "自补：可达性对齐；复用环形回绕取模模式" }
   ]
 }
diff --git a/packages/skin/ui/src/accordion.ts b/packages/skin/ui/src/accordion.ts
index 85ea33e..a320907 100644
--- a/packages/skin/ui/src/accordion.ts
+++ b/packages/skin/ui/src/accordion.ts
@@ -51,5 +51,25 @@ export function accordion(props: AccordionProps): HTMLElement {
     ),
   );
 
-  return h('div', { class: 'ua-accordion' }, ...rows);
+  const root = h('div', { class: 'ua-accordion' }, ...rows);
+
+  // —— 键盘导航：↑↓ 行间环形移动、Home/End 首尾直达，均跳过禁用行（对齐 tabs/tree 约定） ——
+  const heads = (): HTMLButtonElement[] => rows.map((r) => r.firstElementChild as HTMLButtonElement); // 各行标题按钮
+  const focusFrom = (start: number, dir: 1 | -1): void => {
+    const len = heads().length;
+    for (let n = 1; n <= len; n++) {
+      const cand = heads()[(((start + dir * n) % len) + len) % len]; // 环形取候选：越界回绕保证落在 [0, len)
+      if (!cand.disabled) { cand.focus(); return; } // 跳过禁用行，绕满一圈即止
+    }
+  };
+  root.addEventListener('keydown', (e: KeyboardEvent) => {
+    const list = heads();
+    const idx = list.indexOf(document.activeElement as HTMLButtonElement);
+    if (idx < 0) return; // 卫语句：焦点不在标题行
+    if (e.key === 'ArrowDown' || e.key === 'ArrowUp') { e.preventDefault(); focusFrom(idx, e.key === 'ArrowDown' ? 1 : -1); }
+    else if (e.key === 'Home') { e.preventDefault(); focusFrom(-1, 1); }   // 从头正向找第一个可用
+    else if (e.key === 'End') { e.preventDefault(); focusFrom(0, -1); }    // 从尾反向找最后一个可用
+  });
+
+  return root;
 }