diff --git a/src/app/(main)/cps/groups/[id]/page.tsx b/src/app/(main)/cps/groups/[id]/page.tsx
index 7c616e9..4a1b752 100644
--- a/src/app/(main)/cps/groups/[id]/page.tsx
+++ b/src/app/(main)/cps/groups/[id]/page.tsx
@@ -6,7 +6,7 @@ import { useCallback, useEffect, useMemo, useState } from 'react';
 import { useParams, useRouter } from 'next/navigation';
 import dynamic from 'next/dynamic';
 import type { ColumnsType } from 'antd/es/table';
-import { Button, Card, Col, Empty, Row, Segmented, Space, Spin, Statistic, Table, message } from 'antd';
+import { Button, Card, Col, Empty, Modal, Row, Segmented, Space, Spin, Statistic, Table, Tooltip, message } from 'antd';
 import { api, errMsg } from '@/lib/api';
 import { formatUtcTime, yuan } from '@/lib/format';
 
@@ -57,6 +57,20 @@ interface WxUser {
   copy_count: number;
 }
 
+// 某天该群按用户领券下钻(/day-users)
+interface DayCoupon {
+  name: string;
+  count: number;
+}
+interface DayUser {
+  openid: string;
+  nickname: string | null;
+  headimgurl: string | null;
+  copy_count: number;
+  visit_count: number;
+  coupons: DayCoupon[];
+}
+
 const RANGES = [
   { label: '近 3 天', value: 'd3' },
   { label: '近 7 天', value: 'd7' },
@@ -139,6 +153,30 @@ export default function GroupDetailPage() {
     loadWxUsers();
   }, [loadWxUsers]);
 
+  // 某天领券下钻弹窗
+  const [dayDetail, setDayDetail] = useState<{
+    open: boolean;
+    date: string;
+    loading: boolean;
+    users: DayUser[];
+  }>({ open: false, date: '', loading: false, users: [] });
+
+  const openDayDetail = useCallback(
+    async (date: string) => {
+      setDayDetail({ open: true, date, loading: true, users: [] });
+      try {
+        const r = await api.get<{ users: DayUser[] }>(
+          `/admin/api/cps/groups/${id}/day-users?date=${date}`,
+        );
+        setDayDetail((s) => ({ ...s, loading: false, users: r.data.users || [] }));
+      } catch (e) {
+        message.error(errMsg(e, '明细加载失败'));
+        setDayDetail((s) => ({ ...s, loading: false }));
+      }
+    },
+    [id],
+  );
+
   const points = useMemo(() => data?.points ?? [], [data]);
   // 展平成「长表」给折线图:每个 (时间桶 × 指标) 一行,colorField 按指标分 4 条线。
   const chartData = useMemo(
@@ -171,7 +209,7 @@ export default function GroupDetailPage() {
   };
 
   const dailyColumns: ColumnsType<DailyRow> = [
-    { title: '日期', dataIndex: 'date', width: 64, fixed: 'left' },
+    { title: '日期', dataIndex: 'date', width: 96, fixed: 'left' },
     { title: '点击', dataIndex: 'click_pv', width: 56 },
     { title: '独立', dataIndex: 'click_uv', width: 56 },
     { title: '复制', dataIndex: 'copy_pv', width: 56, render: (v: number) => v || '-' },
@@ -224,6 +262,17 @@ export default function GroupDetailPage() {
       width: 84,
       render: (v: number | null) => (v == null ? '-' : <span style={{ color: '#3f8600' }}>{yuan(v)}</span>),
     },
+    {
+      title: '明细',
+      key: 'drill',
+      width: 64,
+      fixed: 'right',
+      render: (_, r) => (
+        <Button type="link" size="small" style={{ padding: 0 }} onClick={() => openDayDetail(r.date)}>
+          明细
+        </Button>
+      ),
+    },
   ];
 
   const wxColumns: ColumnsType<WxUser> = [
@@ -258,6 +307,59 @@ export default function GroupDetailPage() {
     { title: '首次进入', dataIndex: 'first_seen', width: 160, render: (v: string) => formatUtcTime(v) },
   ];
 
+  const dayUserColumns: ColumnsType<DayUser> = [
+    {
+      title: '用户',
+      key: 'user',
+      render: (_, u) => (
+        <Space>
+          {u.headimgurl ? (
+            <img
+              src={u.headimgurl}
+              alt=""
+              style={{ width: 28, height: 28, borderRadius: '50%', objectFit: 'cover' }}
+            />
+          ) : (
+            <span
+              style={{ width: 28, height: 28, borderRadius: '50%', background: '#f0f0f0', display: 'inline-block' }}
+            />
+          )}
+          <span>{u.nickname || '(未授权昵称)'}</span>
+        </Space>
+      ),
+    },
+    {
+      title: '领券次数',
+      dataIndex: 'copy_count',
+      width: 100,
+      sorter: (a, b) => a.copy_count - b.copy_count,
+      render: (v: number) => (v ? <b style={{ color: '#ff4d4f' }}>{v}</b> : 0),
+    },
+    {
+      title: '点击次数',
+      dataIndex: 'visit_count',
+      width: 100,
+      render: (v: number, u) =>
+        u.coupons.length ? (
+          <Tooltip
+            title={
+              <div>
+                {u.coupons.map((c) => (
+                  <div key={c.name}>
+                    {c.name} ×{c.count}
+                  </div>
+                ))}
+              </div>
+            }
+          >
+            <span style={{ cursor: 'help', textDecoration: 'underline dotted' }}>{v}</span>
+          </Tooltip>
+        ) : (
+          v
+        ),
+    },
+  ];
+
   return (
     <div>
       <Space style={{ marginBottom: 16 }} align="center" wrap>
@@ -307,7 +409,7 @@ export default function GroupDetailPage() {
             columns={dailyColumns}
             dataSource={daily?.rows ?? []}
             pagination={false}
-            scroll={{ x: 900 }}
+            scroll={{ x: 1000 }}
           />
         </Card>
       )}
@@ -326,6 +428,28 @@ export default function GroupDetailPage() {
           locale={{ emptyText: '暂无授权用户' }}
         />
       </Card>
+
+      <Modal
+        open={dayDetail.open}
+        title={`群「${data?.group_name ?? ''}」${dayDetail.date} · 用户领券明细`}
+        footer={null}
+        width={640}
+        height={600}
+        onCancel={() => setDayDetail((s) => ({ ...s, open: false }))}
+      >
+        <div style={{ fontSize: 12, color: '#999', marginBottom: 8 }}>
+          仅统计微信授权(openid)用户;美团/京东多为匿名跳转,可能为空。悬停「点击次数」看该用户当天点过的券。
+        </div>
+        <Table<DayUser>
+          rowKey="openid"
+          size="small"
+          loading={dayDetail.loading}
+          columns={dayUserColumns}
+          dataSource={dayDetail.users}
+          pagination={false}
+          locale={{ emptyText: '当天无授权用户领券/点击' }}
+        />
+      </Modal>
     </div>
   );
 }