diff --git a/package.json b/package.json
index 8d38cec5..bf441dfc 100755
--- a/package.json
+++ b/package.json
@@ -14,10 +14,6 @@
     "@fontsource/open-sans": "^4.5.0",
     "@fontsource/raleway": "^4.5.0",
     "@fontsource/roboto": "^4.5.0",
-    "@fullcalendar/core": "^6.1.19",
-    "@fullcalendar/daygrid": "^6.1.19",
-    "@fullcalendar/interaction": "^6.1.19",
-    "@fullcalendar/react": "^6.1.19",
     "@reduxjs/toolkit": "^2.9.2",
     "@splidejs/react-splide": "^0.7.12",
     "@tanstack/react-virtual": "^3.13.12",
diff --git a/src/components/GlobalSidebar/index.js b/src/components/GlobalSidebar/index.js
index 9cc53229..74df1b51 100644
--- a/src/components/GlobalSidebar/index.js
+++ b/src/components/GlobalSidebar/index.js
@@ -29,7 +29,7 @@ import { useNavigate } from 'react-router-dom';
 import { useGlobalSidebar } from '@/contexts/GlobalSidebarContext';
 import { useAuth } from '@/contexts/AuthContext';
 import { getEventDetailUrl } from '@/utils/idEncoder';
-import { Z_INDEX } from '@/layouts/config/layoutConfig';
+import { Z_INDEX, LAYOUT_SIZE } from '@/layouts/config/layoutConfig';
 import WatchSidebar from '@views/Profile/components/WatchSidebar';
 import { WatchlistPanel, FollowingEventsPanel } from '@views/Profile/components/WatchSidebar/components';
 import HotSectorsRanking from '@views/Profile/components/MarketDashboard/components/atoms/HotSectorsRanking';
@@ -269,6 +269,7 @@ const GlobalSidebar = () => {
     <Box
       w={isOpen ? '300px' : '72px'}
       h="100%"
+      pt={LAYOUT_SIZE.navbarHeight}
       flexShrink={0}
       transition="width 0.2s ease-in-out"
       display={{ base: 'none', md: 'block' }}
diff --git a/src/contexts/GlobalSidebarContext.js b/src/contexts/GlobalSidebarContext.js
index ed6078df..8e42888c 100644
--- a/src/contexts/GlobalSidebarContext.js
+++ b/src/contexts/GlobalSidebarContext.js
@@ -18,8 +18,8 @@ export const GlobalSidebarProvider = ({ children }) => {
   const { user } = useAuth();
   const userId = user?.id;
 
-  // 侧边栏展开/收起状态
-  const [isOpen, setIsOpen] = useState(true);
+  // 侧边栏展开/收起状态（默认折叠）
+  const [isOpen, setIsOpen] = useState(false);
 
   // 数据状态
   const [watchlist, setWatchlist] = useState([]);
diff --git a/src/layouts/MainLayout.js b/src/layouts/MainLayout.js
index e4b06d43..c61bea72 100644
--- a/src/layouts/MainLayout.js
+++ b/src/layouts/MainLayout.js
@@ -9,7 +9,7 @@ import BackToTopButton from "./components/BackToTopButton";
 import ErrorBoundary from "../components/ErrorBoundary";
 import PageLoader from "../components/Loading/PageLoader";
 import GlobalSidebar from "../components/GlobalSidebar";
-import { BACK_TO_TOP_CONFIG } from "./config/layoutConfig";
+import { BACK_TO_TOP_CONFIG, LAYOUT_SIZE } from "./config/layoutConfig";
 
 // ✅ P0 性能优化：缓存静态组件，避免路由切换时不必要的重新渲染
 // HomeNavbar (1623行) 和 AppFooter 不依赖路由参数，使用 memo 可大幅减少渲染次数
@@ -40,7 +40,7 @@ export default function MainLayout() {
             <Box flex="1" bg="#1A202C" position="relative" overflow="hidden">
                 {/* 页面内容区域 - 全宽度，与导航栏对齐 */}
                 <Box h="100%" overflowY="auto" display="flex" flexDirection="column">
-                    <Box flex="1">
+                    <Box flex="1" pt={LAYOUT_SIZE.navbarHeight}>
                         <ErrorBoundary>
                             <Suspense fallback={<PageLoader message="页面加载中..." />}>
                                 <Outlet />
diff --git a/src/layouts/config/layoutConfig.js b/src/layouts/config/layoutConfig.js
index 93b1bfc2..68c514e9 100644
--- a/src/layouts/config/layoutConfig.js
+++ b/src/layouts/config/layoutConfig.js
@@ -165,9 +165,9 @@ export const PAGE_LOADER_CONFIG = {
  * 布局尺寸配置
  */
 export const LAYOUT_SIZE = {
-    navbarHeight: '80px',
+    navbarHeight: '60px',  // 导航栏统一高度
     footerHeight: 'auto',
-    contentMinHeight: 'calc(100vh - 80px)',  // 100vh - navbar高度
+    contentMinHeight: 'calc(100vh - 60px)',  // 100vh - navbar高度
 };
 
 /**
diff --git a/src/mocks/data/account.js b/src/mocks/data/account.js
index ba694e60..0c53c2db 100644
--- a/src/mocks/data/account.js
+++ b/src/mocks/data/account.js
@@ -773,6 +773,7 @@ export const mockInvestmentPlans = [
   },
 
   // ==================== 今日数据（用于日历视图展示） ====================
+  // 测试同日期多事件显示：计划 x3, 复盘 x3, 系统 x3
   {
     id: 320,
     user_id: 1,
@@ -832,6 +833,81 @@ export const mockInvestmentPlans = [
     updated_at: '2025-12-23T16:00:00Z',
     tags: ['日复盘', '年末交易'],
     stocks: ['600519.SH', '300750.SZ']
+  },
+  // 额外计划2：测试同日期多计划显示
+  {
+    id: 322,
+    user_id: 1,
+    type: 'plan',
+    title: 'AI算力板块布局',
+    content: `【目标】捕捉AI算力板块机会
+
+【策略】
+- 寒武纪：关注突破信号
+- 中科曙光：服务器龙头
+- 浪潮信息：算力基础设施`,
+    target_date: '2025-12-23',
+    status: 'pending',
+    created_at: '2025-12-23T09:00:00Z',
+    updated_at: '2025-12-23T09:00:00Z',
+    tags: ['AI', '算力'],
+    stocks: ['688256.SH', '603019.SH', '000977.SZ']
+  },
+  // 额外计划3：测试同日期多计划显示
+  {
+    id: 323,
+    user_id: 1,
+    type: 'plan',
+    title: '医药板块观察计划',
+    content: `【目标】关注创新药投资机会
+
+【策略】
+- 恒瑞医药：创新药龙头
+- 药明康德：CRO龙头`,
+    target_date: '2025-12-23',
+    status: 'pending',
+    created_at: '2025-12-23T10:00:00Z',
+    updated_at: '2025-12-23T10:00:00Z',
+    tags: ['医药', '创新药'],
+    stocks: ['600276.SH', '603259.SH']
+  },
+  // 额外复盘2：测试同日期多复盘显示
+  {
+    id: 324,
+    user_id: 1,
+    type: 'review',
+    title: '半导体操作复盘',
+    content: `【操作回顾】
+- 中芯国际：持仓未动
+- 北方华创：观望
+
+【经验总结】
+半导体板块整体震荡，等待突破信号`,
+    target_date: '2025-12-23',
+    status: 'completed',
+    created_at: '2025-12-23T16:00:00Z',
+    updated_at: '2025-12-23T16:30:00Z',
+    tags: ['半导体复盘'],
+    stocks: ['688981.SH', '002371.SZ']
+  },
+  // 额外复盘3：测试同日期多复盘显示
+  {
+    id: 325,
+    user_id: 1,
+    type: 'review',
+    title: '本周白酒持仓复盘',
+    content: `【操作回顾】
+- 茅台：本周加仓0.5%
+- 五粮液：持仓未动
+
+【盈亏分析】
+白酒板块本周表现平稳，继续持有`,
+    target_date: '2025-12-23',
+    status: 'completed',
+    created_at: '2025-12-23T17:00:00Z',
+    updated_at: '2025-12-23T17:30:00Z',
+    tags: ['白酒复盘', '周复盘'],
+    stocks: ['600519.SH', '000858.SZ']
   }
 ];