diff --git a/src/components/task/Avatar.jsx b/src/components/task/Avatar.jsx
new file mode 100644
index 0000000..8575fcd
--- /dev/null
+++ b/src/components/task/Avatar.jsx
@@ -0,0 +1,22 @@
+// 负责人头像: 姓氏首字 + 按名字稳定的底色; 未指派灰色圆点
+const COLORS = ['#1677ff', '#00b578', '#ff8f1f', '#a855f7', '#14b8a6', '#f43f9e', '#5a6a80']
+
+export default function Avatar({ name, size = 18 }) {
+  const seed = [...(name || '')].reduce((a, ch) => a + ch.charCodeAt(0), 0)
+  const color = COLORS[seed % COLORS.length]
+  return (
+    <span
+      className="avatar"
+      title={name || '未指派'}
+      style={{
+        width: size,
+        height: size,
+        fontSize: Math.round(size * 0.52),
+        background: name ? color : '#eef1f5',
+        color: name ? '#fff' : '#b6bcc4',
+      }}
+    >
+      {name ? name.slice(0, 1) : '·'}
+    </span>
+  )
+}
diff --git a/src/components/task/TaskCard.jsx b/src/components/task/TaskCard.jsx
index 37f1a9c..e2aff52 100644
--- a/src/components/task/TaskCard.jsx
+++ b/src/components/task/TaskCard.jsx
@@ -1,4 +1,5 @@
 import StatusDot from './StatusDot.jsx'
+import Avatar from './Avatar.jsx'
 import { kindColor } from '../../pages/task/kind.js'
 
 // 看板卡片 (T-UI-02): 轻量化
@@ -50,9 +51,7 @@ export default function TaskCard({
             <span className="kind-tag" style={{ background: kindColor(task.kind) }}>{task.kind}</span>
           )}
           <span style={{ display: 'flex', alignItems: 'center', gap: 6, marginLeft: 'auto', minWidth: 0, justifyContent: 'flex-end' }}>
-            <span className={`bassignee${task.assignee ? '' : ' none'}`}>
-              {task.assignee?.name || '未指派'}
-            </span>
+            <Avatar name={task.assignee?.name} size={18} />
             {task.members?.length > 0 && (
               <span className="bmembers">+ {task.members.map((m) => m.name).join('、')}</span>
             )}
diff --git a/src/components/task/TaskRow.jsx b/src/components/task/TaskRow.jsx
index 8fcd006..2d4c0d8 100644
--- a/src/components/task/TaskRow.jsx
+++ b/src/components/task/TaskRow.jsx
@@ -1,4 +1,5 @@
 import StatusDot from './StatusDot.jsx'
+import Avatar from './Avatar.jsx'
 import { kindColor } from '../../pages/task/kind.js'
 
 const statusLabel = (s) => (s === 'done' ? '完成' : s === 'doing' ? '执行中' : '未开始')
@@ -65,9 +66,7 @@ export default function TaskRow({
                 onClick={(e) => { e.stopPropagation(); onMore?.(task) }}
                 onPointerDown={(e) => e.stopPropagation()}
               >⋯</span>
-              <span className={`assignee${task.assignee ? '' : ' none'}`}>
-                {task.assignee?.name || '未指派'}
-              </span>
+              <Avatar name={task.assignee?.name} size={20} />
             </div>
           </>
         )}