diff --git a/ThemeManager.cs b/ThemeManager.cs
new file mode 100644
index 0000000..f9b7e1d
--- /dev/null
+++ b/ThemeManager.cs
@@ -0,0 +1,127 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+using System.Text.Json;
+using System.IO;
+
+namespace AppStore
+{
+    public static class ThemeManager
+    {
+        public enum ThemeMode
+        {
+            Light,
+            Dark
+        }
+
+        private static readonly string ThemeConfigPath = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+            "zsyg", "kortapp-z", ".date", "theme.json");
+
+        private static ThemeMode _currentTheme = LoadTheme();
+
+        private static ThemeMode LoadTheme()
+        {
+            try
+            {
+                if (File.Exists(ThemeConfigPath))
+                {
+                    var json = File.ReadAllText(ThemeConfigPath);
+                    return JsonSerializer.Deserialize<ThemeMode>(json);
+                }
+            }
+            catch
+            {
+                // 忽略错误，使用默认主题
+            }
+            return ThemeMode.Light;
+        }
+
+        private static void SaveTheme(ThemeMode theme)
+        {
+            try
+            {
+                var dir = Path.GetDirectoryName(ThemeConfigPath);
+                if (!Directory.Exists(dir))
+                {
+                    Directory.CreateDirectory(dir);
+                }
+                var json = JsonSerializer.Serialize(theme);
+                File.WriteAllText(ThemeConfigPath, json);
+            }
+            catch
+            {
+                // 忽略错误
+            }
+        }
+        
+        // 浅色主题颜色
+        private static readonly Color LightBackground = Color.FromArgb(255, 255, 255);
+        private static readonly Color LightControlBackground = Color.FromArgb(240, 240, 240);
+        private static readonly Color LightText = Color.FromArgb(30, 30, 30);
+        private static readonly Color LightButtonHover = Color.FromArgb(230, 230, 230);
+        private static readonly Color LightButtonActive = Color.FromArgb(220, 220, 220);
+        
+        // 深色主题颜色
+        private static readonly Color DarkBackground = Color.FromArgb(30, 30, 30);
+        private static readonly Color DarkControlBackground = Color.FromArgb(45, 45, 45);
+        private static readonly Color DarkText = Color.FromArgb(240, 240, 240);
+        private static readonly Color DarkButtonHover = Color.FromArgb(60, 60, 60);
+        private static readonly Color DarkButtonActive = Color.FromArgb(70, 70, 70);
+
+        public static event Action<ThemeMode> ThemeChanged = delegate {};
+
+        public static ThemeMode CurrentTheme
+        {
+            get => _currentTheme;
+            set
+            {
+                if (_currentTheme != value)
+                {
+                    _currentTheme = value;
+                    ThemeChanged?.Invoke(value);
+                    SaveTheme(value);
+                }
+            }
+        }
+
+        public static Color BackgroundColor => 
+            _currentTheme == ThemeMode.Light ? LightBackground : DarkBackground;
+
+        public static Color ControlBackgroundColor => 
+            _currentTheme == ThemeMode.Light ? LightControlBackground : DarkControlBackground;
+
+        public static Color TextColor => 
+            _currentTheme == ThemeMode.Light ? LightText : DarkText;
+
+        public static Color ButtonHoverColor => 
+            _currentTheme == ThemeMode.Light ? LightButtonHover : DarkButtonHover;
+
+        public static Color ButtonActiveColor => 
+            _currentTheme == ThemeMode.Light ? LightButtonActive : DarkButtonActive;
+
+        public static void ApplyTheme(Control control)
+        {
+            ApplyThemeToControl(control);
+        }
+
+        private static void ApplyThemeToControl(Control control)
+        {
+            control.BackColor = BackgroundColor;
+            control.ForeColor = TextColor;
+
+            if (control is Button button)
+            {
+                button.FlatStyle = FlatStyle.Flat;
+                button.FlatAppearance.BorderSize = 0;
+                button.FlatAppearance.MouseOverBackColor = ButtonHoverColor;
+                button.FlatAppearance.MouseDownBackColor = ButtonActiveColor;
+            }
+
+            foreach (Control childControl in control.Controls)
+            {
+                ApplyThemeToControl(childControl);
+            }
+        }
+    }
+}