diff --git a/apps/mini-user/src/lib/datetime.ts b/apps/mini-user/src/lib/datetime.ts
new file mode 100644
index 0000000..dbc16b7
--- /dev/null
+++ b/apps/mini-user/src/lib/datetime.ts
@@ -0,0 +1,16 @@
+/** 格式化为 Asia/Shanghai：2026-08-03 15:14:30（不依赖 Intl，兼容微信小程序） */
+export function formatShanghaiDateTime(input?: string | Date | null): string {
+  if (input == null || input === '') return '—';
+  if (typeof input === 'string') {
+    const s = input.trim();
+    if (/^\d{4}-\d{2}-\d{2}[ T]\d{2}:\d{2}/.test(s)) {
+      return s.slice(0, 19).replace('T', ' ');
+    }
+  }
+  const d = input instanceof Date ? input : new Date(input);
+  if (Number.isNaN(d.getTime())) return '—';
+  // 用 UTC 读数 + 固定东八区偏移，避免依赖 Intl / 设备时区 API 差异
+  const sh = new Date(d.getTime() + 8 * 60 * 60 * 1000);
+  const p = (n: number) => String(n).padStart(2, '0');
+  return `${sh.getUTCFullYear()}-${p(sh.getUTCMonth() + 1)}-${p(sh.getUTCDate())} ${p(sh.getUTCHours())}:${p(sh.getUTCMinutes())}:${p(sh.getUTCSeconds())}`;
+}
diff --git a/apps/mini-user/src/pages/redeem-success/index.tsx b/apps/mini-user/src/pages/redeem-success/index.tsx
index 54a41a2..bcf392f 100644
--- a/apps/mini-user/src/pages/redeem-success/index.tsx
+++ b/apps/mini-user/src/pages/redeem-success/index.tsx
@@ -4,6 +4,7 @@ import Taro, { useRouter } from '@tarojs/taro';
 import PageShell from '../../components/PageShell';
 import SubPageHeader from '../../components/SubPageHeader';
 import { request, toast } from '../../lib/api';
+import { formatShanghaiDateTime } from '../../lib/datetime';
 
 const LAST_REDEEM_RESULT_KEY = 'lastRedeemResult';
 
@@ -17,26 +18,17 @@ type RedeemRecord = {
 };
 
 function formatMoney(amount: number) {
-  return amount.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
+  const n = Number(amount);
+  if (!Number.isFinite(n)) return '0.00';
+  const fixed = n.toFixed(2);
+  const [intPart, dec] = fixed.split('.');
+  const withComma = intPart.replace(/\B(?=(\d{3})+(?!\d))/g, ',');
+  return `${withComma}.${dec}`;
 }
 
 /** 与权益「历史记录」一致：2026-08-03 13:53:03（Asia/Shanghai） */
 function formatChinaDateTime(input?: string | null) {
-  const d = input ? new Date(input) : new Date();
-  if (Number.isNaN(d.getTime())) return '—';
-  const parts = new Intl.DateTimeFormat('en-CA', {
-    timeZone: 'Asia/Shanghai',
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-    hour: '2-digit',
-    minute: '2-digit',
-    second: '2-digit',
-    hour12: false,
-  }).formatToParts(d);
-  const get = (type: Intl.DateTimeFormatPartTypes) =>
-    parts.find((p) => p.type === type)?.value ?? '';
-  return `${get('year')}-${get('month')}-${get('day')} ${get('hour')}:${get('minute')}:${get('second')}`;
+  return formatShanghaiDateTime(input ?? new Date());
 }
 
 function StarRating({
diff --git a/apps/mini-user/src/pages/store-detail/index.tsx b/apps/mini-user/src/pages/store-detail/index.tsx
index 6926edd..2aea632 100644
--- a/apps/mini-user/src/pages/store-detail/index.tsx
+++ b/apps/mini-user/src/pages/store-detail/index.tsx
@@ -15,6 +15,7 @@ import ShareNavButton from '../../components/ShareNavButton';
 import StoreRedeemMarquee from '../../components/StoreRedeemMarquee';
 import WechatShareReady from '../../components/WechatShareReady';
 import { request, toast } from '../../lib/api';
+import { formatShanghaiDateTime } from '../../lib/datetime';
 import {
   DEFAULT_SHARE_DESC,
   DEFAULT_SHARE_TITLE,
@@ -91,26 +92,7 @@ function pickStoreId(raw?: string | null) {
 
 /** 与历史记录一致：2026-08-03 15:14:30（Asia/Shanghai） */
 function formatRedeemTime(input?: string | null) {
-  const d = input ? new Date(input) : new Date();
-  if (Number.isNaN(d.getTime())) {
-    // 后端若已是 "2026-08-03 15:14:30" 直接展示
-    const s = String(input || '').trim();
-    if (/^\d{4}-\d{2}-\d{2}/.test(s)) return s.slice(0, 19).replace('T', ' ');
-    return '—';
-  }
-  const parts = new Intl.DateTimeFormat('en-CA', {
-    timeZone: 'Asia/Shanghai',
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-    hour: '2-digit',
-    minute: '2-digit',
-    second: '2-digit',
-    hour12: false,
-  }).formatToParts(d);
-  const get = (type: Intl.DateTimeFormatPartTypes) =>
-    parts.find((p) => p.type === type)?.value ?? '';
-  return `${get('year')}-${get('month')}-${get('day')} ${get('hour')}:${get('minute')}:${get('second')}`;
+  return formatShanghaiDateTime(input);
 }
 
 function formatRedeemAmountYuan(amount: number | string) {