diff --git a/app.py b/app.py
index 7d829af2..7480b2cc 100755
--- a/app.py
+++ b/app.py
@@ -43,6 +43,7 @@ else:
 import base64
 import csv
 import io
+import threading
 import time
 import urllib
 import uuid
@@ -7517,20 +7518,16 @@ def get_stock_quotes():
                         prev_close_map[norm_code] = base_close_map[base_code]
 
             # 批量查询当前价格数据（从 ClickHouse）
+            # 使用 argMax 函数获取最新价格，比窗口函数效率高很多
             batch_price_query = """
-                WITH last_prices AS (
-                    SELECT
-                        code,
-                        close as last_price,
-                        ROW_NUMBER() OVER (PARTITION BY code ORDER BY timestamp DESC) as rn
-                    FROM stock_minute
-                    WHERE code IN %(codes)s
-                      AND timestamp >= %(start)s
-                      AND timestamp <= %(end)s
-                )
-                SELECT code, last_price
-                FROM last_prices
-                WHERE rn = 1
+                SELECT
+                    code,
+                    argMax(close, timestamp) as last_price
+                FROM stock_minute
+                WHERE code IN %(codes)s
+                  AND timestamp >= %(start)s
+                  AND timestamp <= %(end)s
+                GROUP BY code
             """
 
             batch_data = client.execute(batch_price_query, {
@@ -7626,14 +7623,25 @@ def get_stock_quotes():
         return jsonify({'success': False, 'error': str(e)}), 500
 
 
+# ==================== ClickHouse 连接池（单例模式） ====================
+_clickhouse_client = None
+_clickhouse_client_lock = threading.Lock()
+
 def get_clickhouse_client():
-    return Cclient(
-        host='127.0.0.1',
-        port=9000,
-        user='default',
-        password='Zzl33818!',
-        database='stock'
-    )
+    """获取 ClickHouse 客户端（单例模式，避免重复创建连接）"""
+    global _clickhouse_client
+    if _clickhouse_client is None:
+        with _clickhouse_client_lock:
+            if _clickhouse_client is None:
+                _clickhouse_client = Cclient(
+                    host='127.0.0.1',
+                    port=9000,
+                    user='default',
+                    password='Zzl33818!',
+                    database='stock'
+                )
+                print("[ClickHouse] 创建新连接（单例）")
+    return _clickhouse_client
 
 
 @app.route('/api/account/calendar/events', methods=['GET', 'POST'])
diff --git a/src/components/EventDetailPanel/DynamicNewsDetailPanel.js b/src/components/EventDetailPanel/DynamicNewsDetailPanel.js
index 508ce68e..a2d16d1b 100644
--- a/src/components/EventDetailPanel/DynamicNewsDetailPanel.js
+++ b/src/components/EventDetailPanel/DynamicNewsDetailPanel.js
@@ -198,10 +198,6 @@ const DynamicNewsDetailPanel = ({ event, showHeader = true }) => {
     }
   }, [sectionState.stocks, stocks.length, refreshQuotes]);
 
-  // 相关概念 - 展开/收起（无需加载）
-  const handleConceptsToggle = useCallback(() => {
-    dispatchSection({ type: 'TOGGLE', section: 'concepts' });
-  }, []);
 
   // 历史事件对比 - 数据已预加载，只需切换展开状态
   const handleHistoricalToggle = useCallback(() => {
@@ -350,14 +346,10 @@ const DynamicNewsDetailPanel = ({ event, showHeader = true }) => {
             )}
           </CollapsibleSection>
 
-          {/* 相关概念（可折叠） - 需要 PRO 权限 */}
+          {/* 相关概念（手风琴样式） - 需要 PRO 权限 */}
           <RelatedConceptsSection
             eventId={event.id}
             eventTitle={event.title}
-            effectiveTradingDate={event.trading_date || event.created_at}
-            eventTime={event.created_at}
-            isOpen={sectionState.concepts.isOpen}
-            onToggle={handleConceptsToggle}
             subscriptionBadge={!canAccessConcepts ? <SubscriptionBadge tier="pro" size="sm" /> : null}
             isLocked={!canAccessConcepts}
             onLockedClick={() => handleLockedClick('相关概念', 'pro')}
diff --git a/src/components/EventDetailPanel/RelatedConceptsSection/index.js b/src/components/EventDetailPanel/RelatedConceptsSection/index.js
index a687e67a..23a4cab0 100644
--- a/src/components/EventDetailPanel/RelatedConceptsSection/index.js
+++ b/src/components/EventDetailPanel/RelatedConceptsSection/index.js
@@ -1,145 +1,140 @@
 // src/components/EventDetailPanel/RelatedConceptsSection/index.js
-// 相关概念区组件（主组件）
+// 相关概念区组件 - 折叠手风琴样式
 
 import React, { useState, useEffect } from 'react';
 import {
   Box,
-  SimpleGrid,
   Flex,
-  Button,
-  Collapse,
   Heading,
   Center,
   Spinner,
   Text,
+  Badge,
+  VStack,
+  HStack,
+  Icon,
+  Collapse,
   useColorModeValue,
 } from '@chakra-ui/react';
-import { ChevronDownIcon, ChevronUpIcon } from '@chakra-ui/icons';
+import { ChevronRightIcon, ChevronDownIcon } from '@chakra-ui/icons';
 import { useNavigate } from 'react-router-dom';
-import dayjs from 'dayjs';
-import SimpleConceptCard from './SimpleConceptCard';
-import DetailedConceptCard from './DetailedConceptCard';
-import TradingDateInfo from './TradingDateInfo';
 import { logger } from '@utils/logger';
 import { getApiBase } from '@utils/apiConfig';
 
+/**
+ * 单个概念项组件（手风琴项）
+ */
+const ConceptItem = ({ concept, isExpanded, onToggle, onNavigate }) => {
+  const itemBg = useColorModeValue('white', 'gray.700');
+  const itemHoverBg = useColorModeValue('gray.50', 'gray.650');
+  const borderColor = useColorModeValue('gray.200', 'gray.600');
+  const conceptColor = useColorModeValue('blue.600', 'blue.300');
+  const reasonBg = useColorModeValue('blue.50', 'gray.800');
+  const reasonColor = useColorModeValue('gray.700', 'gray.200');
+  const iconColor = useColorModeValue('gray.500', 'gray.400');
+
+  return (
+    <Box
+      borderWidth="1px"
+      borderColor={borderColor}
+      borderRadius="md"
+      overflow="hidden"
+      bg={itemBg}
+    >
+      {/* 概念标题行 - 可点击展开 */}
+      <Flex
+        px={3}
+        py={2.5}
+        cursor="pointer"
+        align="center"
+        justify="space-between"
+        _hover={{ bg: itemHoverBg }}
+        onClick={onToggle}
+        transition="background 0.2s"
+      >
+        <HStack spacing={2} flex={1}>
+          <Icon
+            as={isExpanded ? ChevronDownIcon : ChevronRightIcon}
+            color={iconColor}
+            boxSize={4}
+            transition="transform 0.2s"
+          />
+          <Text
+            fontSize="sm"
+            fontWeight="medium"
+            color={conceptColor}
+            cursor="pointer"
+            _hover={{ textDecoration: 'underline' }}
+            onClick={(e) => {
+              e.stopPropagation();
+              onNavigate(concept);
+            }}
+          >
+            {concept.concept}
+          </Text>
+          <Badge colorScheme="green" fontSize="xs" flexShrink={0}>
+            AI 分析
+          </Badge>
+        </HStack>
+      </Flex>
+
+      {/* 关联原因 - 可折叠 */}
+      <Collapse in={isExpanded} animateOpacity>
+        <Box
+          px={4}
+          py={3}
+          bg={reasonBg}
+          borderTop="1px solid"
+          borderTopColor={borderColor}
+        >
+          <Text
+            fontSize="sm"
+            color={reasonColor}
+            lineHeight="1.8"
+            whiteSpace="pre-wrap"
+          >
+            {concept.reason || '暂无关联原因说明'}
+          </Text>
+        </Box>
+      </Collapse>
+    </Box>
+  );
+};
+
 /**
  * 相关概念区组件
  * @param {Object} props
  * @param {number} props.eventId - 事件ID（用于获取 related_concepts 表数据）
- * @param {string} props.eventTitle - 事件标题（备用，当 eventId 不存在时使用搜索）
- * @param {string} props.effectiveTradingDate - 有效交易日期（涨跌幅数据日期）
- * @param {string|Object} props.eventTime - 事件发生时间
+ * @param {string} props.eventTitle - 事件标题（备用）
  * @param {React.ReactNode} props.subscriptionBadge - 订阅徽章组件（可选）
- * @param {boolean} props.isLocked - 是否锁定详细模式（需要付费）
- * @param {Function} props.onLockedClick - 锁定时的点击回调（触发付费弹窗）
+ * @param {boolean} props.isLocked - 是否锁定（需要付费）
+ * @param {Function} props.onLockedClick - 锁定时的点击回调
  */
 const RelatedConceptsSection = ({
   eventId,
   eventTitle,
-  effectiveTradingDate,
-  eventTime,
   subscriptionBadge = null,
   isLocked = false,
   onLockedClick = null,
-  isOpen = undefined,  // 新增：受控模式（外部控制展开状态）
-  onToggle = undefined  // 新增：受控模式（外部控制展开回调）
 }) => {
-  // 使用外部 isOpen，如果没有则使用内部 useState
-  const [internalExpanded, setInternalExpanded] = useState(false);
-  const isExpanded = onToggle !== undefined ? isOpen : internalExpanded;
   const [concepts, setConcepts] = useState([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState(null);
+  // 记录每个概念的展开状态
+  const [expandedItems, setExpandedItems] = useState({});
   const navigate = useNavigate();
 
   // 颜色配置
   const sectionBg = useColorModeValue('gray.50', 'gray.750');
   const headingColor = useColorModeValue('gray.700', 'gray.200');
   const textColor = useColorModeValue('gray.600', 'gray.400');
+  const countBadgeBg = useColorModeValue('blue.100', 'blue.800');
+  const countBadgeColor = useColorModeValue('blue.700', 'blue.200');
 
-  console.log('[RelatedConceptsSection] 组件渲染', {
-    eventId,
-    eventTitle,
-    effectiveTradingDate,
-    eventTime,
-    loading,
-    conceptsCount: concepts?.length || 0,
-    error
-  });
-
-  // 获取相关概念 - 优先使用 eventId 从数据库获取
+  // 获取相关概念
   useEffect(() => {
     const fetchConcepts = async () => {
-      console.log('[RelatedConceptsSection] useEffect 触发', {
-        eventId,
-        eventTitle,
-        effectiveTradingDate
-      });
-
-      // 优先使用 eventId 获取数据库中的相关概念
-      if (eventId) {
-        try {
-          setLoading(true);
-          setError(null);
-
-          const apiUrl = `${getApiBase()}/api/events/${eventId}/concepts`;
-          console.log('[RelatedConceptsSection] 从数据库获取相关概念', { url: apiUrl });
-
-          const response = await fetch(apiUrl, {
-            method: 'GET',
-            headers: { 'Content-Type': 'application/json' },
-            credentials: 'include'
-          });
-
-          if (!response.ok) {
-            // 如果是 403，说明需要订阅，不是错误
-            if (response.status === 403) {
-              console.log('[RelatedConceptsSection] 需要订阅才能查看');
-              setConcepts([]);
-              setLoading(false);
-              return;
-            }
-            throw new Error(`HTTP error! status: ${response.status}`);
-          }
-
-          const data = await response.json();
-          console.log('[RelatedConceptsSection] 数据库响应', data);
-
-          if (data.success && Array.isArray(data.data)) {
-            // 转换数据格式，使其与原有展示逻辑兼容
-            const formattedConcepts = data.data.map(item => ({
-              concept: item.concept,
-              reason: item.reason,
-              // 保留原有字段以兼容 DetailedConceptCard
-              score: 1,  // 数据库中的都是高相关度
-              description: item.reason,  // reason 作为描述
-              stocks: [],  // 暂无股票数据
-              stock_count: 0
-            }));
-            console.log('[RelatedConceptsSection] 设置概念数据', formattedConcepts);
-            setConcepts(formattedConcepts);
-          } else {
-            setConcepts([]);
-          }
-        } catch (err) {
-          console.error('[RelatedConceptsSection] 获取概念失败', err);
-          logger.error('RelatedConceptsSection', 'fetchConcepts', err);
-          setError('加载概念数据失败');
-          setConcepts([]);
-        } finally {
-          setLoading(false);
-        }
-        return;
-      }
-
-      // 降级方案：使用 eventTitle 搜索概念（兼容旧逻辑）
-      if (!eventTitle || !effectiveTradingDate) {
-        console.log('[RelatedConceptsSection] 缺少必要参数，跳过搜索', {
-          hasEventId: !!eventId,
-          hasEventTitle: !!eventTitle,
-          hasEffectiveTradingDate: !!effectiveTradingDate
-        });
+      if (!eventId) {
         setLoading(false);
         return;
       }
@@ -148,48 +143,35 @@ const RelatedConceptsSection = ({
         setLoading(true);
         setError(null);
 
-        // 格式化交易日期
-        let formattedTradeDate;
-        try {
-          formattedTradeDate = dayjs(effectiveTradingDate).format('YYYY-MM-DD');
-          if (!dayjs(formattedTradeDate, 'YYYY-MM-DD', true).isValid()) {
-            formattedTradeDate = dayjs().format('YYYY-MM-DD');
-          }
-        } catch (error) {
-          formattedTradeDate = dayjs().format('YYYY-MM-DD');
-        }
-
-        const requestBody = {
-          query: eventTitle,
-          size: 5,
-          page: 1,
-          sort_by: "_score",
-          trade_date: formattedTradeDate
-        };
-
-        const apiUrl = `${getApiBase()}/concept-api/search`;
-        console.log('[RelatedConceptsSection] 降级：使用搜索接口', { url: apiUrl, requestBody });
-
+        const apiUrl = `${getApiBase()}/api/events/${eventId}/concepts`;
         const response = await fetch(apiUrl, {
-          method: 'POST',
+          method: 'GET',
           headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify(requestBody)
+          credentials: 'include'
         });
 
         if (!response.ok) {
+          if (response.status === 403) {
+            setConcepts([]);
+            setLoading(false);
+            return;
+          }
           throw new Error(`HTTP error! status: ${response.status}`);
         }
 
         const data = await response.json();
-        if (data.results && Array.isArray(data.results)) {
-          setConcepts(data.results);
-        } else if (data.data && data.data.concepts) {
-          setConcepts(data.data.concepts);
+        if (data.success && Array.isArray(data.data)) {
+          setConcepts(data.data);
+          // 默认展开第一个
+          if (data.data.length > 0) {
+            setExpandedItems({ 0: true });
+          }
         } else {
           setConcepts([]);
         }
       } catch (err) {
-        console.error('[RelatedConceptsSection] 搜索概念失败', err);
+        console.error('[RelatedConceptsSection] 获取概念失败', err);
+        logger.error('RelatedConceptsSection', 'fetchConcepts', err);
         setError('加载概念数据失败');
         setConcepts([]);
       } finally {
@@ -198,93 +180,66 @@ const RelatedConceptsSection = ({
     };
 
     fetchConcepts();
-  }, [eventId, eventTitle, effectiveTradingDate]);
+  }, [eventId]);
+
+  // 切换某个概念的展开状态
+  const toggleItem = (index) => {
+    if (isLocked && onLockedClick) {
+      onLockedClick();
+      return;
+    }
+    setExpandedItems(prev => ({
+      ...prev,
+      [index]: !prev[index]
+    }));
+  };
+
+  // 跳转到概念中心
+  const handleNavigate = (concept) => {
+    navigate(`/concepts?q=${encodeURIComponent(concept.concept)}`);
+  };
 
   // 加载中状态
   if (loading) {
     return (
       <Box bg={sectionBg} p={3} borderRadius="md">
         <Center py={4}>
-          <Spinner size="md" color="blue.500" mr={2} />
+          <Spinner size="sm" color="blue.500" mr={2} />
           <Text color={textColor} fontSize="sm">加载相关概念中...</Text>
         </Center>
       </Box>
     );
   }
 
-  // 判断是否有数据
   const hasNoConcepts = !concepts || concepts.length === 0;
 
-  /**
-   * 根据相关度获取颜色（浅色背景 + 深色文字）
-   * @param {number} relevance - 相关度（0-100）
-   * @returns {Object} 包含背景色和文字色
-   */
-  const getRelevanceColor = (relevance) => {
-    if (relevance >= 90) {
-      return { bg: 'purple.50', color: 'purple.800' }; // 极高相关
-    } else if (relevance >= 80) {
-      return { bg: 'pink.50', color: 'pink.800' }; // 高相关
-    } else if (relevance >= 70) {
-      return { bg: 'orange.50', color: 'orange.800' }; // 中等相关
-    } else {
-      return { bg: 'gray.100', color: 'gray.700' }; // 低相关
-    }
-  };
-
-  /**
-   * 处理概念点击
-   * @param {Object} concept - 概念对象
-   */
-  const handleConceptClick = (concept) => {
-    // 跳转到概念中心，并搜索该概念
-    navigate(`/concepts?q=${encodeURIComponent(concept.concept)}`);
-  };
-
   return (
     <Box bg={sectionBg} p={3} borderRadius="md">
-      {/* 标题栏 - 两行布局 */}
-      <Box mb={3}>
-        {/* 第一行：标题 + Badge + 按钮 */}
-        <Flex justify="space-between" align="center" mb={2}>
-          <Flex align="center" gap={2}>
-            <Heading size="sm" color={headingColor}>
-              相关概念
-            </Heading>
-            {/* 订阅徽章 */}
-            {subscriptionBadge}
-          </Flex>
-          <Button
-            size="sm"
-            variant="ghost"
-            colorScheme="blue"
-            rightIcon={isExpanded ? <ChevronUpIcon /> : <ChevronDownIcon />}
-            onClick={() => {
-              // 如果被锁定且有回调函数，触发付费弹窗
-              if (isLocked && onLockedClick) {
-                onLockedClick();
-              } else if (onToggle !== undefined) {
-                // 受控模式：调用外部回调
-                onToggle();
-              } else {
-                // 非受控模式：使用内部状态
-                setInternalExpanded(!internalExpanded);
-              }
-            }}
-          >
-            {isExpanded ? '收起' : '查看详细'}
-          </Button>
-        </Flex>
-        {/* 第二行：交易日期信息 */}
-        <TradingDateInfo
-          effectiveTradingDate={effectiveTradingDate}
-          eventTime={eventTime}
-        />
-      </Box>
+      {/* 标题栏 */}
+      <Flex justify="space-between" align="center" mb={3}>
+        <HStack spacing={2}>
+          <Heading size="sm" color={headingColor}>
+            相关概念
+          </Heading>
+          {!hasNoConcepts && (
+            <Badge
+              bg={countBadgeBg}
+              color={countBadgeColor}
+              fontSize="xs"
+              px={2}
+              py={0.5}
+              borderRadius="full"
+            >
+              {concepts.length}
+            </Badge>
+          )}
+          {subscriptionBadge}
+        </HStack>
+      </Flex>
 
-      {/* 简单模式：横向卡片列表（总是显示） */}
+      {/* 概念列表 - 手风琴样式 */}
       {hasNoConcepts ? (
-        <Box mb={isExpanded ? 3 : 0}>
+        <Box py={2}>
           {error ? (
             <Text color="red.500" fontSize="sm">{error}</Text>
           ) : (
@@ -292,41 +247,18 @@ const RelatedConceptsSection = ({
           )}
         </Box>
       ) : (
-        <Flex gap={2} flexWrap="wrap" mb={isExpanded ? 3 : 0}>
+        <VStack spacing={2} align="stretch">
           {concepts.map((concept, index) => (
-            <SimpleConceptCard
-              key={index}
+            <ConceptItem
+              key={concept.id || index}
               concept={concept}
-              onClick={handleConceptClick}
-              getRelevanceColor={getRelevanceColor}
+              isExpanded={!!expandedItems[index]}
+              onToggle={() => toggleItem(index)}
+              onNavigate={handleNavigate}
             />
           ))}
-        </Flex>
+        </VStack>
       )}
-
-      {/* 详细模式：卡片网格（可折叠） */}
-      <Collapse in={isExpanded} animateOpacity>
-        {hasNoConcepts ? (
-          <Box py={4}>
-            {error ? (
-              <Text color="red.500" fontSize="sm" textAlign="center">{error}</Text>
-            ) : (
-              <Text color={textColor} fontSize="sm" textAlign="center">暂无详细数据</Text>
-            )}
-          </Box>
-        ) : (
-          /* 详细概念卡片网格 */
-          <SimpleGrid columns={{ base: 1, md: 2 }} spacing={4}>
-            {concepts.map((concept, index) => (
-              <DetailedConceptCard
-                key={index}
-                concept={concept}
-                onClick={handleConceptClick}
-              />
-            ))}
-          </SimpleGrid>
-        )}
-      </Collapse>
     </Box>
   );
 };