diff --git a/src/ui/calendar_widget.py b/src/ui/calendar_widget.py
index ed66583..5331faf 100644
--- a/src/ui/calendar_widget.py
+++ b/src/ui/calendar_widget.py
@@ -13,6 +13,9 @@ from PyQt5.QtWidgets import (
 from PyQt5.QtCore import QDate, Qt, pyqtSignal
 from PyQt5.QtGui import QFont
 
+# 导入主题管理器
+from .theme_manager import theme_manager
+
 
 class CalendarWidget(QWidget):
     """日历组件类"""
@@ -24,6 +27,7 @@ class CalendarWidget(QWidget):
         super().__init__(parent)
         self.setup_ui()
         self.setup_connections()
+        self.setup_theme()
         
     def setup_ui(self):
         """设置UI界面"""
@@ -266,6 +270,295 @@ class CalendarWidget(QWidget):
             date = QDate.fromString(date, "yyyy-MM-dd")
         self.calendar.setSelectedDate(date)
         self.update_date_label(date)
+    
+    def setup_theme(self):
+        """设置主题"""
+        # 连接主题切换信号
+        theme_manager.theme_changed.connect(self.on_theme_changed)
+        
+        # 应用当前主题
+        self.apply_theme()
+    
+    def apply_theme(self):
+        """应用主题样式"""
+        is_dark = theme_manager.is_dark_theme()
+        
+        if is_dark:
+            # 深色主题样式
+            self.setStyleSheet("""
+                QWidget {
+                    background-color: #2c2c2e;
+                    color: #f0f0f0;
+                }
+            """)
+            
+            # 更新日历控件样式
+            self.calendar.setStyleSheet("""
+                QCalendarWidget {
+                    background-color: #2c2c2e;
+                    border: 1px solid #404040;
+                    border-radius: 4px;
+                }
+                QCalendarWidget QToolButton {
+                    height: 30px;
+                    width: 80px;
+                    color: #f0f0f0;
+                    font-size: 12px;
+                    font-weight: bold;
+                    background-color: #3a3a3c;
+                    border: 1px solid #4a4a4c;
+                    border-radius: 4px;
+                }
+                QCalendarWidget QToolButton:hover {
+                    background-color: #4a4a4c;
+                }
+                QCalendarWidget QMenu {
+                    width: 150px;
+                    left: 20px;
+                    color: #f0f0f0;
+                    font-size: 12px;
+                    background-color: #3a3a3c;
+                    border: 1px solid #4a4a4c;
+                }
+                QCalendarWidget QSpinBox {
+                    width: 80px;
+                    font-size: 12px;
+                    background-color: #3a3a3c;
+                    selection-background-color: #0a84ff;
+                    selection-color: #ffffff;
+                    border: 1px solid #4a4a4c;
+                    border-radius: 4px;
+                    color: #f0f0f0;
+                }
+                QCalendarWidget QSpinBox::up-button {
+                    subcontrol-origin: border;
+                    subcontrol-position: top right;
+                    width: 20px;
+                }
+                QCalendarWidget QSpinBox::down-button {
+                    subcontrol-origin: border;
+                    subcontrol-position: bottom right;
+                    width: 20px;
+                }
+                QCalendarWidget QSpinBox::up-arrow {
+                    width: 10px;
+                    height: 10px;
+                }
+                QCalendarWidget QSpinBox::down-arrow {
+                    width: 10px;
+                    height: 10px;
+                }
+                QCalendarWidget QWidget {
+                    alternate-background-color: #3a3a3c;
+                }
+                QCalendarWidget QAbstractItemView:enabled {
+                    font-size: 12px;
+                    selection-background-color: #0a84ff;
+                    selection-color: #ffffff;
+                    background-color: #2c2c2e;
+                    color: #f0f0f0;
+                }
+                QCalendarWidget QWidget#qt_calendar_navigationbar {
+                    background-color: #3a3a3c;
+                }
+            """)
+            
+            # 更新标签样式
+            self.date_label.setStyleSheet("QLabel { color: #a0a0a0; }")
+            
+            # 更新按钮样式
+            self.close_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #3a3a3c;
+                    border: 1px solid #4a4a4c;
+                    border-radius: 12px;
+                    font-size: 16px;
+                    font-weight: bold;
+                    color: #f0f0f0;
+                }
+                QPushButton:hover {
+                    background-color: #4a4a4c;
+                }
+            """)
+            
+            self.today_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #0a84ff;
+                    color: white;
+                    border: none;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #0066cc;
+                }
+            """)
+            
+            self.clear_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #3a3a3c;
+                    color: #f0f0f0;
+                    border: 1px solid #4a4a4c;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #4a4a4c;
+                }
+            """)
+            
+            self.insert_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #32d74b;
+                    color: #000000;
+                    border: none;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #24b334;
+                }
+            """)
+        else:
+            # 浅色主题样式
+            self.setStyleSheet("""
+                QWidget {
+                    background-color: white;
+                    color: #333333;
+                }
+            """)
+            
+            # 更新日历控件样式
+            self.calendar.setStyleSheet("""
+                QCalendarWidget {
+                    background-color: white;
+                    border: 1px solid #ccc;
+                    border-radius: 4px;
+                }
+                QCalendarWidget QToolButton {
+                    height: 30px;
+                    width: 80px;
+                    color: #333;
+                    font-size: 12px;
+                    font-weight: bold;
+                    background-color: #f0f0f0;
+                    border: 1px solid #ccc;
+                    border-radius: 4px;
+                }
+                QCalendarWidget QToolButton:hover {
+                    background-color: #e0e0e0;
+                }
+                QCalendarWidget QMenu {
+                    width: 150px;
+                    left: 20px;
+                    color: #333;
+                    font-size: 12px;
+                    background-color: white;
+                    border: 1px solid #ccc;
+                }
+                QCalendarWidget QSpinBox {
+                    width: 80px;
+                    font-size: 12px;
+                    background-color: #f0f0f0;
+                    selection-background-color: #0078d7;
+                    selection-color: white;
+                    border: 1px solid #ccc;
+                    border-radius: 4px;
+                    color: #333;
+                }
+                QCalendarWidget QSpinBox::up-button {
+                    subcontrol-origin: border;
+                    subcontrol-position: top right;
+                    width: 20px;
+                }
+                QCalendarWidget QSpinBox::down-button {
+                    subcontrol-origin: border;
+                    subcontrol-position: bottom right;
+                    width: 20px;
+                }
+                QCalendarWidget QSpinBox::up-arrow {
+                    width: 10px;
+                    height: 10px;
+                }
+                QCalendarWidget QSpinBox::down-arrow {
+                    width: 10px;
+                    height: 10px;
+                }
+                QCalendarWidget QWidget {
+                    alternate-background-color: #f0f0f0;
+                }
+                QCalendarWidget QAbstractItemView:enabled {
+                    font-size: 12px;
+                    selection-background-color: #0078d7;
+                    selection-color: white;
+                    background-color: white;
+                    color: #333;
+                }
+                QCalendarWidget QWidget#qt_calendar_navigationbar {
+                    background-color: #f8f8f8;
+                }
+            """)
+            
+            # 更新标签样式
+            self.date_label.setStyleSheet("QLabel { color: #666; }")
+            
+            # 更新按钮样式
+            self.close_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #f0f0f0;
+                    border: 1px solid #ccc;
+                    border-radius: 12px;
+                    font-size: 16px;
+                    font-weight: bold;
+                    color: #333;
+                }
+                QPushButton:hover {
+                    background-color: #e0e0e0;
+                }
+            """)
+            
+            self.today_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #0078d7;
+                    color: white;
+                    border: none;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #005a9e;
+                }
+            """)
+            
+            self.clear_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #f0f0f0;
+                    color: #333;
+                    border: 1px solid #ccc;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #e0e0e0;
+                }
+            """)
+            
+            self.insert_btn.setStyleSheet("""
+                QPushButton {
+                    background-color: #4CAF50;
+                    color: white;
+                    border: none;
+                    border-radius: 4px;
+                    padding: 5px 10px;
+                }
+                QPushButton:hover {
+                    background-color: #45a049;
+                }
+            """)
+    
+    def on_theme_changed(self, is_dark):
+        """主题切换槽函数"""
+        self.apply_theme()
 
 
 if __name__ == "__main__":
diff --git a/src/word_main_window.py b/src/word_main_window.py
index 04341b2..dbf2859 100644
--- a/src/word_main_window.py
+++ b/src/word_main_window.py
@@ -323,6 +323,11 @@ class WordStyleMainWindow(QMainWindow):
         # 更新功能区下拉框样式
         if hasattr(self, 'ribbon'):
             self.update_ribbon_styles(is_dark)
+        
+        # 更新日历组件样式
+        if hasattr(self, 'calendar_widget') and self.calendar_widget is not None:
+            # 日历组件有自己的主题管理机制，只需触发其主题更新
+            self.calendar_widget.apply_theme()
     
     def update_ribbon_styles(self, is_dark):
         """更新功能区样式"""