diff --git a/blueprints/api.py b/blueprints/api.py
index 72fee15..1ea786e 100644
--- a/blueprints/api.py
+++ b/blueprints/api.py
@@ -68,7 +68,7 @@ def generate():
 
         # 2. 扣除积分 (如果是试用模式)
         if use_trial:
-            deduct_points(user, cost)
+            deduct_points(user_id, cost)
 
         model_value = data.get('model')
         prompt = data.get('prompt')
@@ -84,7 +84,6 @@ def generate():
             "prompt": prompt,
             "model": model_value,
             "response_format": "url",
-            "n": int(data.get('n', 1)), # 添加数量
             "aspect_ratio": data.get('ratio')
         }
         image_data = data.get('image_data', [])
@@ -120,7 +119,7 @@ def video_generate():
             return jsonify({"error": error}), 400
             
         # 2. 扣除积分
-        deduct_points(user, cost)
+        deduct_points(user_id, cost)
 
         # 3. 构造 Payload
         payload = {
diff --git a/services/generation_service.py b/services/generation_service.py
index d194ede..821a9c9 100644
--- a/services/generation_service.py
+++ b/services/generation_service.py
@@ -28,7 +28,6 @@ def validate_generation_request(user, data):
     is_premium = data.get('is_premium', False)
     input_key = data.get('apiKey')
     model_value = data.get('model')
-    n = int(data.get('n', 1)) # 获取请求中的数量
     
     target_api = Config.AI_API
     api_key = None
@@ -52,12 +51,9 @@ def validate_generation_request(user, data):
             return None, None, 0, False, "可用积分已耗尽，请充值或切换至自定义 Key 模式"
             
     # 计算单价
-    base_cost = get_model_cost(model_value, is_video=False)
+    cost = get_model_cost(model_value, is_video=False)
     if use_trial and is_premium:
-        base_cost *= 2
-        
-    # 总消耗 = 单价 * 数量
-    cost = base_cost * n
+        cost *= 2
         
     if use_trial:
         if user.points < cost:
@@ -65,21 +61,23 @@ def validate_generation_request(user, data):
     
     return api_key, target_api, cost, use_trial, None
 
-def deduct_points(user, cost):
-    """扣除积分"""
-    user.points -= cost
-    user.has_used_points = True
-    db.session.commit()
+def deduct_points(user_id, cost):
+    """原子扣除积分"""
+    user = db.session.query(User).filter_by(id=user_id).populate_existing().with_for_update().first()
+    if user:
+        user.points -= cost
+        user.has_used_points = True
+        db.session.commit()
 
 def refund_points(user_id, cost):
-    """退还积分"""
+    """原子退还积分"""
     try:
-        user = db.session.get(User, user_id)
+        user = db.session.query(User).filter_by(id=user_id).populate_existing().with_for_update().first()
         if user:
             user.points += cost
             db.session.commit()
     except:
-        pass
+        db.session.rollback()
 
 def handle_chat_generation_sync(user_id, api_key, model_value, prompt, use_trial, cost):
     """同步处理对话类模型"""
diff --git a/static/js/main.js b/static/js/main.js
index 0a28ece..fb6b1fb 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -503,103 +503,86 @@ document.getElementById('submitBtn').onclick = async () => {
             image_data = await Promise.all(uploadedFiles.map(f => readFileAsBase64(f)));
         }
 
-        // 2. 发起单次生成请求 (包含数量 n)
-        btnText.innerText = `AI 构思中...`;
+        // 2. 并行启动多个生成任务
+        btnText.innerText = `AI 构思中 (0/${num})...`;
+        let finishedCount = 0;
 
-        // 预先创建 Slot (对应数量)
-        const slots = [];
-        for (let i = 0; i < num; i++) {
+        const startTask = async (index) => {
             const slot = document.createElement('div');
             slot.className = 'image-frame relative bg-white/50 animate-pulse min-h-[200px] flex items-center justify-center rounded-[2.5rem] border border-slate-100 shadow-sm';
             slot.innerHTML = `<div class="text-slate-400 text-[10px] font-bold italic">正在排队中...</div>`;
             grid.appendChild(slot);
-            slots.push(slot);
-        }
 
-        // 3. 提交任务
-        const r = await fetch('/api/generate', {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
-                mode: currentMode,
-                n: num, // 发送数量
-                is_premium: document.getElementById('isPremium')?.checked || false,
-                apiKey: currentMode === 'key' ? apiKey : '',
-                prompt: document.getElementById('manualPrompt').value,
-                model: document.getElementById('modelSelect').value,
-                ratio: document.getElementById('ratioSelect').value,
-                size: document.getElementById('sizeSelect').value,
-                image_data // 发送 Base64 数组
-            })
-        });
-        const res = await r.json();
-        if (res.error) throw new Error(res.error);
-
-        // 如果直接返回了 data (比如聊天模型)，直接显示在第一个 slot
-        if (res.data) {
-            displayResult(slots[0], res.data[0]);
-            // 移除其他多余的 slots
-            for (let i = 1; i < slots.length; i++) slots[i].remove();
-            return;
-        }
-
-        // 4. 轮询任务状态
-        const taskId = res.task_id;
-        let pollCount = 0;
-        const maxPolls = 500;
-
-        while (pollCount < maxPolls) {
-            await new Promise(resolve => setTimeout(resolve, 2000));
-            pollCount++;
-
-            const statusR = await fetch(`/api/task_status/${taskId}`);
-            const statusRes = await statusR.json();
-
-            if (statusRes.status === 'complete') {
-                const urls = statusRes.urls;
-                currentGeneratedUrls = urls;
-
-                // 填充所有 slots
-                urls.forEach((url, idx) => {
-                    if (slots[idx]) {
-                        displayResult(slots[idx], { url });
-                    }
+            try {
+                // 1. 发起生成请求，获取任务 ID
+                const r = await fetch('/api/generate', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        mode: currentMode,
+                        is_premium: document.getElementById('isPremium')?.checked || false,
+                        apiKey: currentMode === 'key' ? apiKey : '',
+                        prompt: document.getElementById('manualPrompt').value,
+                        model: document.getElementById('modelSelect').value,
+                        ratio: document.getElementById('ratioSelect').value,
+                        size: document.getElementById('sizeSelect').value,
+                        image_data // 发送 Base64 数组
+                    })
                 });
+                const res = await r.json();
+                if (res.error) throw new Error(res.error);
 
-                // 如果返回的数量少于 slots 数量，移除多余的
-                if (urls.length < slots.length) {
-                    for (let i = urls.length; i < slots.length; i++) slots[i].remove();
+                // 如果直接返回了 data (比如聊天模型)，直接显示
+                if (res.data) {
+                    displayResult(slot, res.data[0]);
+                    return;
                 }
 
-                btnText.innerText = `生成完成`;
-                if (currentMode === 'trial') checkAuth();
-                return;
-            } else if (statusRes.status === 'error') {
-                throw new Error(statusRes.message || "生成失败");
-            } else {
-                // 更新所有 slot 的轮询状态显示
-                slots.forEach(slot => {
-                    slot.innerHTML = `<div class="text-slate-400 text-[10px] font-bold italic">AI 正在努力创作中 (${pollCount * 2}s)...</div>`;
-                });
+                // 2. 轮询任务状态
+                const taskId = res.task_id;
+                let pollCount = 0;
+                const maxPolls = 500; // 最多轮询约 16 分钟 (2s * 500 = 1000s)
+
+                while (pollCount < maxPolls) {
+                    await new Promise(resolve => setTimeout(resolve, 2000));
+                    pollCount++;
+
+                    const statusR = await fetch(`/api/task_status/${taskId}`);
+                    const statusRes = await statusR.json();
+
+                    if (statusRes.status === 'complete') {
+                        const imgUrl = statusRes.urls[0];
+                        currentGeneratedUrls.push(imgUrl);
+                        displayResult(slot, { url: imgUrl });
+                        finishedCount++;
+                        btnText.innerText = `AI 构思中 (${finishedCount}/${num})...`;
+                        if (currentMode === 'trial') checkAuth();
+                        return; // 任务正常结束
+                    } else if (statusRes.status === 'error') {
+                        throw new Error(statusRes.message || "生成失败");
+                    } else {
+                        // 继续轮询状态显示
+                        slot.innerHTML = `<div class="text-slate-400 text-[10px] font-bold italic">AI 正在努力创作中 (${pollCount * 2}s)...</div>`;
+                    }
+                }
+                throw new Error("生成超时，请稍后在历史记录中查看");
+
+            } catch (e) {
+                slot.className = 'image-frame relative bg-red-50/50 flex items-center justify-center rounded-[2.5rem] border border-red-100 p-6';
+                if (e.message.includes('401') || e.message.includes('请先登录')) {
+                    slot.innerHTML = `<div class="text-red-400 text-[10px] font-bold text-center">登录已过期，请重新登录</div>`;
+                } else {
+                    slot.innerHTML = `<div class="text-red-400 text-[10px] font-bold text-center">生成异常: ${e.message}</div>`;
+                }
             }
-        }
-        throw new Error("生成超时，请稍后在历史记录中查看");
+        };
+
+        const tasks = Array.from({ length: num }, (_, i) => startTask(i));
+        await Promise.all(tasks);
 
     } catch (e) {
-        // 在第一个 slot 显示错误
-        if (grid.firstChild) {
-            const firstSlot = grid.firstChild;
-            firstSlot.className = 'image-frame relative bg-red-50/50 flex items-center justify-center rounded-[2.5rem] border border-red-100 p-6';
-            if (e.message.includes('401') || e.message.includes('请先登录')) {
-                firstSlot.innerHTML = `<div class="text-red-400 text-[10px] font-bold text-center">登录已过期，请重新登录</div>`;
-            } else {
-                firstSlot.innerHTML = `<div class="text-red-400 text-[10px] font-bold text-center">生成异常: ${e.message}</div>`;
-            }
-            // 移除其他 slots
-            while (grid.children.length > 1) {
-                grid.lastChild.remove();
-            }
-        }
+        showToast('创作引擎中断: ' + e.message, 'error');
+        document.getElementById('placeholder').classList.remove('hidden');
     } finally {
         btn.disabled = false;
         btnText.innerText = "立即生成作品";