diff --git a/core/frontend/src/routes/account.tsx b/core/frontend/src/routes/account.tsx
index 492c125..1d0e6ec 100644
--- a/core/frontend/src/routes/account.tsx
+++ b/core/frontend/src/routes/account.tsx
@@ -20,6 +20,7 @@ const RANGE_META: Record<TrendRange, { chip: string; sub: string; totalLabel: st
 };
 
 type Tab = "overview" | "by-project" | "by-member" | "bills";
+type TopupQuote = { amount: number; bonus: number; channel: "wechat" | "alipay" };
 
 // 项目状态 → 三态(对齐 V1 进行中 / 已完成 / 失败 · 待重跑)
 function projBucket(p: Project): "wip" | "ok" | "fail" {
@@ -135,6 +136,8 @@ export function AccountPage({ billing, projects, team, onRecharge, onNotify }: {
 
   // 充值扫码弹窗:点支付方式先弹弹窗,弹窗内「已完成支付」才真正提交
   const [topupChannel, setTopupChannel] = useState<"wechat" | "alipay" | null>(null);
+  // 弹窗退场动画期间仍会保留在 DOM 中；打开时冻结本次支付快照，避免清空自定义金额后回显为预选套餐。
+  const [topupQuote, setTopupQuote] = useState<TopupQuote | null>(null);
 
   // 趋势(day,首屏)+ 团队成员(成员/限额 tab)本页懒加载
   const [trend, setTrend] = useState<BillingTrend | null>(null);
@@ -192,16 +195,17 @@ export function AccountPage({ billing, projects, team, onRecharge, onNotify }: {
 
   function openTopup(channel: "wechat" | "alipay") {
     if (!validateCustomAmount()) return;
+    setTopupQuote({ amount: effectiveAmount, bonus: effectiveBonus, channel });
     setTopupChannel(channel);
   }
 
   async function submitRecharge() {
-    if (!validateCustomAmount()) {
+    if (!topupQuote || topupQuote.amount < MIN_RECHARGE_AMOUNT) {
+      onNotify("error", `最小充值金额为 ${MIN_RECHARGE_AMOUNT} 元`);
       setTopupChannel(null);
       return;
     }
-    if (effectiveAmount <= 0) return;
-    await onRecharge(effectiveAmount, effectiveBonus); // 父级 action 成功后弹全局「充值成功」toast
+    await onRecharge(topupQuote.amount, topupQuote.bonus); // 父级 action 成功后弹全局「充值成功」toast
     setTopupChannel(null);
     setCustomAmt("");
     setBillPage(1);
@@ -610,9 +614,9 @@ export function AccountPage({ billing, projects, team, onRecharge, onNotify }: {
 
       <TopupModal
         open={topupChannel !== null}
-        channel={topupChannel ?? "wechat"}
-        amount={effectiveAmount}
-        bonus={effectiveBonus} rate={pointsRate}
+        channel={topupQuote?.channel ?? topupChannel ?? "wechat"}
+        amount={topupQuote?.amount ?? effectiveAmount}
+        bonus={topupQuote?.bonus ?? effectiveBonus} rate={pointsRate}
         close={() => setTopupChannel(null)}
         onDone={submitRecharge}
       />