diff --git a/lua/keymap.lua b/lua/keymap.lua
index aa0d4ba..3c2ed23 100644
--- a/lua/keymap.lua
+++ b/lua/keymap.lua
@@ -36,15 +36,22 @@ G.map({
   { 'n', '<down>',     ':res +5<CR>' },
   { 'n', '<left>',     ':vertical resize -5<CR>' },
   { 'n', '<right>',    ':vertical resize +5<CR>' },
+})
 
-  -- Reasonix AI agent：根据窗口宽高自适应方向（宽→上下分屏，高→左右分屏）
-  { 'n', '<C-i>', function()
-    local ui = vim.api.nvim_list_uis()[1]
+-- 终端 / Reasonix：根据窗口宽高自适应分屏方向（横屏→下方，竖屏→右侧）
+do
+  local function split_term(ui, cmd)
     local wide = ui.width > ui.height
     local term = require('toggleterm.terminal').Terminal:new({
       direction = wide and 'horizontal' or 'vertical',
-      cmd = 'reasonix',
+      cmd = cmd,
     })
     term:toggle()
-  end, { noremap = true } },
-})
+  end
+
+  G.map({
+    { 'n', '<c-t>', function() split_term(vim.api.nvim_list_uis()[1]) end, { noremap = true } },
+    { 'i', '<c-t>', function() split_term(vim.api.nvim_list_uis()[1]) end, { noremap = true } },
+    { 'n', '<C-i>', function() split_term(vim.api.nvim_list_uis()[1], 'reasonix') end, { noremap = true } },
+  })
+end
diff --git a/lua/plugs/dev.lua b/lua/plugs/dev.lua
index 1ee3e5b..b906bcc 100644
--- a/lua/plugs/dev.lua
+++ b/lua/plugs/dev.lua
@@ -32,22 +32,19 @@ return {
     dependencies = { "nvim-lua/plenary.nvim" },
   },
   {
-    -- 终端
+    -- 终端（方向由 keymap.lua <c-t> 自适应控制）
     'akinsho/toggleterm.nvim',
     version = "*",
     config = function()
       require("toggleterm").setup {
-        -- size can be a number or function which is passed the current terminal
         size = 10,
-        open_mapping = [[<c-t>]],
-        hide_numbers = true, -- hide the number column in toggleterm buffers
+        hide_numbers = true,
         shade_filetypes = {},
         shade_terminals = true,
-        shading_factor = 1,     -- the degree by which to darken to terminal colour, default: 1 for dark backgrounds, 3 for light
+        shading_factor = 1,
         start_in_insert = true,
-        insert_mappings = true, -- whether or not the open mapping applies in insert mode
         persist_size = true,
-        direction = 'horizontal',
+        -- direction 不写死，由 keymap 创建时动态决定
       }
     end
   }