diff --git a/app/components/GroupSummary.jsx b/app/components/GroupSummary.jsx
index 706d91b..3626869 100644
--- a/app/components/GroupSummary.jsx
+++ b/app/components/GroupSummary.jsx
@@ -8,6 +8,8 @@ function CountUp({ value, prefix = '', suffix = '', decimals = 2, className = ''
   const [displayValue, setDisplayValue] = useState(value);
   const previousValue = useRef(value);
   const isFirstChange = useRef(true);
+  const rafIdRef = useRef(null);
+  const displayValueRef = useRef(value);
 
   useEffect(() => {
     if (previousValue.current === value) return;
@@ -15,13 +17,14 @@ function CountUp({ value, prefix = '', suffix = '', decimals = 2, className = ''
     if (isFirstChange.current) {
       isFirstChange.current = false;
       previousValue.current = value;
+      displayValueRef.current = value;
       setDisplayValue(value);
       return;
     }
 
-    const start = previousValue.current;
+    const start = displayValueRef.current;
     const end = value;
-    const duration = 400;
+    const duration = 300;
     const startTime = performance.now();
 
     const animate = (currentTime) => {
@@ -29,16 +32,25 @@ function CountUp({ value, prefix = '', suffix = '', decimals = 2, className = ''
       const progress = Math.min(elapsed / duration, 1);
       const ease = 1 - Math.pow(1 - progress, 4);
       const current = start + (end - start) * ease;
+      displayValueRef.current = current;
       setDisplayValue(current);
 
       if (progress < 1) {
-        requestAnimationFrame(animate);
+        rafIdRef.current = requestAnimationFrame(animate);
       } else {
         previousValue.current = value;
+        rafIdRef.current = null;
       }
     };
 
-    requestAnimationFrame(animate);
+    rafIdRef.current = requestAnimationFrame(animate);
+
+    return () => {
+      if (rafIdRef.current != null) {
+        cancelAnimationFrame(rafIdRef.current);
+        rafIdRef.current = null;
+      }
+    };
   }, [value]);
 
   return (
diff --git a/app/components/TradeModal.jsx b/app/components/TradeModal.jsx
index 024d26b..da3105e 100644
--- a/app/components/TradeModal.jsx
+++ b/app/components/TradeModal.jsx
@@ -202,7 +202,7 @@ export default function TradeModal({ type, fund, holding, onClose, onConfirm, pe
   };
 
   const isValid = isBuy
-    ? (!!amount && !!feeRate && !!date && calcShare !== null && !loadingBuyMeta && (parseFloat(amount) || 0) >= (Number(minBuyAmount) || 0))
+    ? (!!amount && !!feeRate && !!date && calcShare !== null && !loadingBuyMeta)
     : (!!share && !!date);
 
   const handleSetShareFraction = (fraction) => {
@@ -434,9 +434,7 @@ export default function TradeModal({ type, fund, holding, onClose, onConfirm, pe
                           </label>
                           <div
                             style={{
-                              border: (!amount || (Number(minBuyAmount) > 0 && (parseFloat(amount) || 0) < Number(minBuyAmount)))
-                                ? '1px solid var(--danger)'
-                                : '1px solid var(--border)',
+                              border: !amount ? '1px solid var(--danger)' : '1px solid var(--border)',
                               borderRadius: 12
                             }}
                           >
@@ -444,15 +442,10 @@ export default function TradeModal({ type, fund, holding, onClose, onConfirm, pe
                               value={amount}
                               onChange={setAmount}
                               step={100}
-                              min={Number(minBuyAmount) || 0}
-                              placeholder={(Number(minBuyAmount) || 0) > 0 ? `最少 ¥${Number(minBuyAmount)}，请输入加仓金额` : '请输入加仓金额'}
+                              min={0}
+                              placeholder="请输入加仓金额"
                             />
                           </div>
-                          {(Number(minBuyAmount) || 0) > 0 && (
-                            <div className="muted" style={{ fontSize: '12px', marginTop: 6 }}>
-                              最小加仓金额：¥{Number(minBuyAmount)}
-                            </div>
-                          )}
                         </div>
 
                         <div className="row" style={{ gap: 12, marginBottom: 16 }}>