diff --git a/include/controller/callbacks.h b/include/controller/callbacks.h
index 1205c2b..38530ba 100644
--- a/include/controller/callbacks.h
+++ b/include/controller/callbacks.h
@@ -17,6 +17,7 @@ int btn_ok_cb(Ihandle *self);
 int btn_cancel_cb(Ihandle *self);
 int btn_help_cb(Ihandle *self);
 int btn_lang_cb(Ihandle *self);
+int darkmode_cb(Ihandle *self);
 
 // 撤销/重做回调
 int btn_undo_cb(Ihandle *self);
diff --git a/include/ui/ui_utils.h b/include/ui/ui_utils.h
index 9b57c4e..eec015c 100644
--- a/include/ui/ui_utils.h
+++ b/include/ui/ui_utils.h
@@ -17,4 +17,8 @@ void refresh_single_list_style(Ihandle *list);
 // 会先清空列表然后重新添加所有项，最后刷新样式
 void sync_string_list_to_ui(Ihandle *list_ui, const StringList *str_list);
 
+// 深色模式状态管理
+void set_dark_mode(int enabled);
+int get_dark_mode(void);
+
 #endif // UI_UTILS_H
diff --git a/include/utils/ui_constants.h b/include/utils/ui_constants.h
index b052aa8..bae36bc 100644
--- a/include/utils/ui_constants.h
+++ b/include/utils/ui_constants.h
@@ -35,6 +35,7 @@
 #define CTRL_BTN_CANCEL "BTN_CANCEL"
 #define CTRL_BTN_HELP "BTN_HELP"
 #define CTRL_BTN_LANG "BTN_LANG"
+#define CTRL_BTN_DARKMODE "BTN_DARKMODE"
 
 // 撤销/重做按钮
 #define CTRL_BTN_UNDO "BTN_UNDO"
diff --git a/locale/en_US/LC_MESSAGES/en_US.mo b/locale/en_US/LC_MESSAGES/en_US.mo
index 439c72f..b4a29a4 100644
Binary files a/locale/en_US/LC_MESSAGES/en_US.mo and b/locale/en_US/LC_MESSAGES/en_US.mo differ
diff --git a/locale/zh_CN/LC_MESSAGES/zh_CN.mo b/locale/zh_CN/LC_MESSAGES/zh_CN.mo
index 375f38b..2048a6a 100644
Binary files a/locale/zh_CN/LC_MESSAGES/zh_CN.mo and b/locale/zh_CN/LC_MESSAGES/zh_CN.mo differ
diff --git a/lua/config.lua b/lua/config.lua
index 5d7ca2b..374ee5f 100644
--- a/lua/config.lua
+++ b/lua/config.lua
@@ -26,6 +26,18 @@ local config = {
         backcolor = "255 255 255"
     },
 
+    -- 主题颜色
+    theme = {
+        light_bg = "240 240 240",
+        light_list_bg = "255 255 255",
+        light_list_alt = "245 245 245",
+        light_fg = "0 0 0",
+        dark_bg = "30 30 30",
+        dark_list_bg = "40 40 40",
+        dark_list_alt = "50 50 50",
+        dark_fg = "220 220 220",
+    },
+
     -- 按钮设置（使用英文原文，供 gettext 翻译）
     button = {
         rastersize = "100x32",
@@ -43,6 +55,8 @@ local config = {
         help = "Help",
         undo = "Undo",
         redo = "Redo",
+        darkmode = "Dark Mode",
+        lightmode = "Light Mode",
     },
 
     -- 标签文本（使用英文原文，供 gettext 翻译）
diff --git a/po/compile_mo.py b/po/compile_mo.py
new file mode 100644
index 0000000..15ef553
--- /dev/null
+++ b/po/compile_mo.py
@@ -0,0 +1,67 @@
+import struct, re, os
+
+def compile_po_to_mo(po_path, mo_path):
+    with open(po_path, 'r', encoding='utf-8') as f:
+        content = f.read()
+
+    entries = []
+    for match in re.finditer(
+        r'msgid "(.+?)"\s*\nmsgstr "(.*?)"',
+        content, re.DOTALL
+    ):
+        msgid = match.group(1)
+        msgstr = match.group(2)
+        if msgid:
+            entries.append((msgid, msgstr))
+
+    if not entries:
+        print(f'No entries in {po_path}')
+        return
+
+    N = len(entries)
+    header_sz = 28
+    table_sz = N * 8 * 2
+
+    orig_off = header_sz + table_sz
+    orig_data = b''
+    orig_offsets = []
+    for eid, estr in entries:
+        orig_offsets.append(len(orig_data))
+        orig_data += eid.encode('utf-8') + b'\x00'
+
+    trans_off = orig_off + len(orig_data)
+    trans_data = b''
+    trans_offsets = []
+    for eid, estr in entries:
+        trans_offsets.append(len(trans_data))
+        trans_data += estr.encode('utf-8') + b'\x00'
+
+    buf = bytearray()
+    buf += struct.pack('<I', 0x950412de)
+    buf += struct.pack('<I', 0)
+    buf += struct.pack('<I', N)
+    buf += struct.pack('<I', orig_off)
+    buf += struct.pack('<I', trans_off)
+    buf += struct.pack('<I', 0)
+    buf += struct.pack('<I', 0)
+
+    for i in range(N):
+        buf += struct.pack('<II', len(entries[i][0].encode('utf-8')), orig_offsets[i])
+    for i in range(N):
+        buf += struct.pack('<II', len(entries[i][1].encode('utf-8')), trans_offsets[i])
+
+    buf += orig_data
+    buf += trans_data
+
+    os.makedirs(os.path.dirname(mo_path), exist_ok=True)
+    with open(mo_path, 'wb') as f:
+        f.write(buf)
+    print(f'{po_path} -> {mo_path}  ({N} strings)')
+
+base = os.path.dirname(os.path.abspath(__file__))
+root = os.path.dirname(base)
+
+compile_po_to_mo(os.path.join(root, 'po', 'zh_CN.po'), os.path.join(root, 'locale', 'zh_CN', 'LC_MESSAGES', 'zh_CN.mo'))
+compile_po_to_mo(os.path.join(root, 'po', 'en_US.po'), os.path.join(root, 'locale', 'en_US', 'LC_MESSAGES', 'en_US.mo'))
+compile_po_to_mo(os.path.join(root, 'po', 'zh_CN.po'), os.path.join(root, 'build', 'locale', 'zh_CN', 'LC_MESSAGES', 'zh_CN.mo'))
+compile_po_to_mo(os.path.join(root, 'po', 'en_US.po'), os.path.join(root, 'build', 'locale', 'en_US', 'LC_MESSAGES', 'en_US.mo'))
diff --git a/po/en_US.po b/po/en_US.po
index 7bb3616..89359c6 100644
--- a/po/en_US.po
+++ b/po/en_US.po
@@ -406,4 +406,12 @@ msgstr "Please select an item to delete first"
 
 #: src/controller/callbacks_basic.c
 msgid "This path already exists and will not be added again."
-msgstr "This path already exists and will not be added again."
\ No newline at end of file
+msgstr "This path already exists and will not be added again."
+
+#: src/ui/main_window.c
+msgid "Dark Mode"
+msgstr "Dark Mode"
+
+#: src/ui/main_window.c
+msgid "Light Mode"
+msgstr "Light Mode"
\ No newline at end of file
diff --git a/po/messages.pot b/po/messages.pot
index 69dbf35..82bb00b 100644
--- a/po/messages.pot
+++ b/po/messages.pot
@@ -124,3 +124,11 @@ msgstr ""
 #: src/controller/callbacks_nav.c
 msgid "Redo completed"
 msgstr ""
+
+#: src/ui/main_window.c
+msgid "Dark Mode"
+msgstr ""
+
+#: src/ui/main_window.c
+msgid "Light Mode"
+msgstr ""
diff --git a/po/zh_CN.po b/po/zh_CN.po
index 8412ab6..5c92c63 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -406,4 +406,12 @@ msgstr "请先选择要删除的项"
 
 #: src/controller/callbacks_basic.c
 msgid "This path already exists and will not be added again."
-msgstr "该路径已存在，不会重复添加。"
\ No newline at end of file
+msgstr "该路径已存在，不会重复添加。"
+
+#: src/ui/main_window.c
+msgid "Dark Mode"
+msgstr "深色模式"
+
+#: src/ui/main_window.c
+msgid "Light Mode"
+msgstr "浅色模式"
\ No newline at end of file
diff --git a/src/controller/callbacks_sys.c b/src/controller/callbacks_sys.c
index e13ba7f..a090e01 100644
--- a/src/controller/callbacks_sys.c
+++ b/src/controller/callbacks_sys.c
@@ -226,3 +226,36 @@ int dlg_k_any_cb(Ihandle *self, int c)
     }
     return IUP_DEFAULT;
 }
+
+// 深色模式切换回调
+int darkmode_cb(Ihandle *self)
+{
+    Ihandle *dlg = IupGetDialog(self);
+    int dark = !get_dark_mode();
+    set_dark_mode(dark);
+
+    IupSetAttribute(dlg, "BGCOLOR", dark
+        ? lua_config_get_string("theme", "dark_bg")
+        : lua_config_get_string("theme", "light_bg"));
+
+    IupSetAttribute(self, "TITLE", _(dark
+        ? lua_config_get_string("button", "lightmode")
+        : lua_config_get_string("button", "darkmode")));
+
+    Ihandle *lists[] = {
+        IupGetDialogChild(dlg, CTRL_LIST_SYS),
+        IupGetDialogChild(dlg, CTRL_LIST_USER),
+        IupGetDialogChild(dlg, CTRL_LIST_MERGED),
+        NULL
+    };
+    for (int i = 0; lists[i]; i++)
+    {
+        const char *list_bg = dark
+            ? lua_config_get_string("theme", "dark_list_bg")
+            : lua_config_get_string("theme", "light_list_bg");
+        IupSetAttribute(lists[i], "BGCOLOR", list_bg);
+        refresh_single_list_style(lists[i]);
+    }
+
+    return IUP_DEFAULT;
+}
diff --git a/src/core/lua_config.c b/src/core/lua_config.c
index 4efddc9..88b8403 100644
--- a/src/core/lua_config.c
+++ b/src/core/lua_config.c
@@ -63,6 +63,14 @@ static const char *get_string_default(const char *section, const char *key)
             return "取消";
         if (strcmp(key, "help") == 0)
             return "帮助(?)";
+        if (strcmp(key, "undo") == 0)
+            return "撤销";
+        if (strcmp(key, "redo") == 0)
+            return "重做";
+        if (strcmp(key, "darkmode") == 0)
+            return "深色模式";
+        if (strcmp(key, "lightmode") == 0)
+            return "浅色模式";
     }
     else if (strcmp(section, "label") == 0)
     {
@@ -74,11 +82,32 @@ static const char *get_string_default(const char *section, const char *key)
             return "系统变量 (System)";
         if (strcmp(key, "tab_user") == 0)
             return "用户变量 (User)";
+        if (strcmp(key, "tab_merged") == 0)
+            return "合并预览";
         if (strcmp(key, "export_title") == 0)
             return "导出 PATH";
         if (strcmp(key, "import_title") == 0)
             return "导入 PATH";
     }
+    else if (strcmp(section, "theme") == 0)
+    {
+        if (strcmp(key, "light_bg") == 0)
+            return "240 240 240";
+        if (strcmp(key, "light_list_bg") == 0)
+            return "255 255 255";
+        if (strcmp(key, "light_list_alt") == 0)
+            return "245 245 245";
+        if (strcmp(key, "light_fg") == 0)
+            return "0 0 0";
+        if (strcmp(key, "dark_bg") == 0)
+            return "30 30 30";
+        if (strcmp(key, "dark_list_bg") == 0)
+            return "40 40 40";
+        if (strcmp(key, "dark_list_alt") == 0)
+            return "50 50 50";
+        if (strcmp(key, "dark_fg") == 0)
+            return "220 220 220";
+    }
     else if (strcmp(section, "layout") == 0)
     {
         if (strcmp(key, "vbox_gap") == 0)
diff --git a/src/ui/main_window.c b/src/ui/main_window.c
index f710758..eb8b6e2 100644
--- a/src/ui/main_window.c
+++ b/src/ui/main_window.c
@@ -1,4 +1,5 @@
 #include "ui/main_window.h"
+#include "ui/ui_utils.h"
 #include "controller/callbacks.h"
 #include "controller/callbacks_internal.h"
 #include "core/lua_config.h"
@@ -14,7 +15,7 @@ static Ihandle *create_path_list(const char *name)
     IupSetAttribute(list, "NAME", name);
     IupSetAttribute(list, "EXPAND", "YES");
     IupSetAttribute(list, "ITEMPADDING", lua_config_get_string("list", "item_padding"));
-    IupSetAttribute(list, "BACKCOLOR", lua_config_get_string("list", "backcolor"));
+    IupSetAttribute(list, "BGCOLOR", lua_config_get_string("list", "backcolor"));
     IupSetAttribute(list, "BORDER", "YES");
     IupSetAttribute(list, "CANFOCUS", "YES");
     IupSetAttribute(list, "HLINE", "NO");
@@ -47,10 +48,10 @@ Ihandle *create_main_window(void)
     IupSetAttribute(list_merged, "NAME", CTRL_LIST_MERGED);
     IupSetAttribute(list_merged, "EXPAND", "YES");
     IupSetAttribute(list_merged, "ITEMPADDING", lua_config_get_string("list", "item_padding"));
-    IupSetAttribute(list_merged, "BACKCOLOR", lua_config_get_string("list", "backcolor"));
+    IupSetAttribute(list_merged, "BGCOLOR", lua_config_get_string("list", "backcolor"));
     IupSetAttribute(list_merged, "BORDER", "YES");
     IupSetAttribute(list_merged, "HLINE", "NO");
-    IupSetAttribute(list_merged, "ACTIVE", "NO");  // 只读
+    // 不设置 ACTIVE=NO，否则会禁用滚动；合并列表无编辑回调，已是只读
 
     // 创建搜索框
     Ihandle *txt_search = IupText(NULL);
@@ -113,6 +114,11 @@ Ihandle *create_main_window(void)
     IupSetAttribute(btn_lang, "NAME", CTRL_BTN_LANG);
     IupSetCallback(btn_lang, "ACTION", (Icallback)btn_lang_cb);
 
+    // 创建深色模式切换按钮
+    Ihandle *btn_darkmode = IupButton(_(lua_config_get_string("button", "darkmode")), NULL);
+    IupSetAttribute(btn_darkmode, "NAME", CTRL_BTN_DARKMODE);
+    IupSetCallback(btn_darkmode, "ACTION", (Icallback)darkmode_cb);
+
     // 设置按钮回调
     IupSetCallback(btn_new, "ACTION", (Icallback)btn_new_cb);
     IupSetCallback(btn_edit, "ACTION", (Icallback)btn_edit_cb);
@@ -140,6 +146,7 @@ Ihandle *create_main_window(void)
     IupSetAttribute(btn_undo, "RASTERSIZE", btn_size);
     IupSetAttribute(btn_redo, "RASTERSIZE", btn_size);
     IupSetAttribute(btn_lang, "RASTERSIZE", btn_size);
+    IupSetAttribute(btn_darkmode, "RASTERSIZE", btn_size);
 
     // 创建操作按钮垂直布局
     Ihandle *vbox_btns = IupVbox(
@@ -183,7 +190,7 @@ Ihandle *create_main_window(void)
     IupSetAttribute(btn_help, "RASTERSIZE", btn_size);
 
     // 创建底部按钮水平布局
-    Ihandle *hbox_bottom = IupHbox(lbl_status, IupFill(), btn_help, btn_lang, btn_ok, btn_cancel, NULL);
+    Ihandle *hbox_bottom = IupHbox(lbl_status, IupFill(), btn_help, btn_darkmode, btn_lang, btn_ok, btn_cancel, NULL);
     IupSetAttribute(hbox_bottom, "GAP", lua_config_get_string("layout", "hbox_gap"));
     IupSetAttribute(hbox_bottom, "MARGIN", lua_config_get_string("layout", "hbox_margin"));
     IupSetAttribute(hbox_bottom, "ALIGNMENT", lua_config_get_string("layout", "hbox_alignment"));
@@ -255,4 +262,11 @@ void refresh_main_window_ui(Ihandle *main_dlg)
     Ihandle *btn_lang = IupGetDialogChild(main_dlg, CTRL_BTN_LANG);
     if (btn_lang)
         IupSetAttribute(btn_lang, "TITLE", _("Language"));
+
+    // 深色模式按钮文字根据当前模式更新
+    Ihandle *btn_darkmode = IupGetDialogChild(main_dlg, CTRL_BTN_DARKMODE);
+    if (btn_darkmode)
+        IupSetAttribute(btn_darkmode, "TITLE", get_dark_mode()
+            ? _(lua_config_get_string("button", "lightmode"))
+            : _(lua_config_get_string("button", "darkmode")));
 }
\ No newline at end of file
diff --git a/src/ui/ui_utils.c b/src/ui/ui_utils.c
index 91a13c9..f17eae4 100644
--- a/src/ui/ui_utils.c
+++ b/src/ui/ui_utils.c
@@ -1,10 +1,23 @@
 #include "ui/ui_utils.h"
 #include "utils/os_env.h"
 #include "utils/string_ext.h"
+#include "core/lua_config.h"
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 
+static int g_dark_mode = 0;
+
+void set_dark_mode(int enabled)
+{
+    g_dark_mode = enabled;
+}
+
+int get_dark_mode(void)
+{
+    return g_dark_mode;
+}
+
 // 刷新列表样式（斑马纹 + 有效性检查）
 void refresh_single_list_style(Ihandle *list)
 {
@@ -12,30 +25,42 @@ void refresh_single_list_style(Ihandle *list)
         return;
     int count = IupGetInt(list, "COUNT");
 
+    // 读取主题颜色，带默认值保护
+    const char *alt_color = g_dark_mode
+        ? lua_config_get_string("theme", "dark_list_alt")
+        : lua_config_get_string("theme", "light_list_alt");
+    const char *bg_color = g_dark_mode
+        ? lua_config_get_string("theme", "dark_list_bg")
+        : lua_config_get_string("theme", "light_list_bg");
+    const char *fg_default = g_dark_mode
+        ? lua_config_get_string("theme", "dark_fg")
+        : lua_config_get_string("theme", "light_fg");
+
+    // 防止 NULL 或空字符串，使用硬编码默认值
+    if (!alt_color || !*alt_color) alt_color = g_dark_mode ? "50 50 50" : "245 245 245";
+    if (!bg_color || !*bg_color)  bg_color  = g_dark_mode ? "40 40 40" : "255 255 255";
+    if (!fg_default || !*fg_default) fg_default = g_dark_mode ? "220 220 220" : "0 0 0";
+
     for (int i = 1; i <= count; i++)
     {
         char *item = IupGetAttributeId(list, "", i);
         if (!item)
             continue;
 
-        // 默认颜色：黑字
-        char fg_color[32] = "0 0 0";
+        char fg_color[32];
+        sprintf(fg_color, "%s", fg_default);
 
         // 1. 检查有效性
         if (!is_path_valid(item))
-        {
-            // 无效路径：红色
-            sprintf(fg_color, "255 0 0");
-        }
+            sprintf(fg_color, "255 0 0");   // 无效路径：红色
 
-        // 2. 检查重复 (只检查当前项之前的项，如果之前出现过，当前项标橙)
+        // 2. 检查重复
         for (int j = 1; j < i; j++)
         {
             char *prev_item = IupGetAttributeId(list, "", j);
-            if (prev_item && _stricmp(item, prev_item) == 0) // Windows 路径不区分大小写
+            if (prev_item && _stricmp(item, prev_item) == 0)
             {
-                // 重复路径：橙色
-                sprintf(fg_color, "255 128 0");
+                sprintf(fg_color, "255 128 0"); // 重复路径：橙色
                 break;
             }
         }
@@ -43,14 +68,8 @@ void refresh_single_list_style(Ihandle *list)
         IupSetAttributeId(list, "ITEMFGCOLOR", i, fg_color);
 
         // 斑马纹背景
-        if (i % 2 == 0)
-        {
-            IupSetAttributeId(list, "ITEMBGCOLOR", i, "245 245 245");
-        }
-        else
-        {
-            IupSetAttributeId(list, "ITEMBGCOLOR", i, "255 255 255");
-        }
+        IupSetAttributeId(list, "ITEMBGCOLOR", i,
+            (i % 2 == 0) ? alt_color : bg_color);
     }
 }
 
@@ -60,7 +79,7 @@ void sync_string_list_to_ui(Ihandle *list_ui, const StringList *str_list)
     if (!list_ui || !str_list) return;
 
     IupSetAttribute(list_ui, "REMOVEITEM", "ALL");
-    
+
     for (int i = 0; i < str_list->count; i++)
     {
         const char *item = string_list_get(str_list, i);
@@ -78,6 +97,6 @@ void sync_string_list_to_ui(Ihandle *list_ui, const StringList *str_list)
         }
     }
     IupSetInt(list_ui, "COUNT", str_list->count);
-    
+
     refresh_single_list_style(list_ui);
-}
\ No newline at end of file
+}