diff --git a/src/renderer/js/app.js b/src/renderer/js/app.js
index f38ecb3..58ee3e2 100644
--- a/src/renderer/js/app.js
+++ b/src/renderer/js/app.js
@@ -217,97 +217,111 @@ class TerminalApp {
   }
 
   initKeyboardShortcuts() {
-    window.addEventListener('keydown', (e) => {
-      // Ctrl+Shift+P 或 F1: 命令面板
-      if ((e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'p') || e.key === 'F1') {
-        e.preventDefault();
-        this.commandPalette.toggle();
-        return;
-      }
-
-      // Ctrl+B: 切换左侧工作区侧边栏
-      if (e.ctrlKey && e.key.toLowerCase() === 'b') {
-        e.preventDefault();
-        this.workspaceManager?.toggleSidebar();
-        return;
-      }
-
-      // Ctrl+Shift+T: 新建当前工作区标签页
-      if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 't') {
-        e.preventDefault();
-        const activeWs = this.workspaceManager ? this.workspaceManager.getActiveWorkspace() : null;
-        const spawnOpts = this.workspaceManager ? this.workspaceManager.getSpawnOptions(activeWs?.id) : {};
-        this.tabManager.createTab({
-          workspaceId: activeWs?.id,
-          title: spawnOpts.title,
-          cwd: spawnOpts.cwd,
-          shell: spawnOpts.shell,
-          args: spawnOpts.args,
-        });
-        return;
-      }
-
-      // Ctrl+Shift+W: 关闭窗格
-      if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'w') {
-        e.preventDefault();
-        const tab = this.tabManager.getActiveTab();
-        if (tab && tab.splitTree.activeTerminal) {
-          tab.splitTree.closeTerminal(tab.splitTree.activeTerminal.id);
+    window.addEventListener(
+      'keydown',
+      (e) => {
+        // Ctrl+Shift+P 或 F1: 命令面板
+        if ((e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'p') || e.key === 'F1') {
+          e.preventDefault();
+          e.stopPropagation();
+          this.commandPalette.toggle();
+          return;
         }
-        return;
-      }
 
-      // Ctrl+Shift+E: 水平分屏 (左右)
-      if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'e') {
-        e.preventDefault();
-        const tab = this.tabManager.getActiveTab();
-        if (tab) tab.splitTree.splitCurrent('horizontal');
-        return;
-      }
-
-      // Ctrl+Shift+O: 垂直分屏 (上下)
-      if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'o') {
-        e.preventDefault();
-        const tab = this.tabManager.getActiveTab();
-        if (tab) tab.splitTree.splitCurrent('vertical');
-        return;
-      }
-
-      // Ctrl+Shift+F: 搜索
-      if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'f') {
-        e.preventDefault();
-        this.toggleSearch();
-        return;
-      }
-
-      // Ctrl+,: 设置
-      if (e.ctrlKey && e.key === ',') {
-        e.preventDefault();
-        this.settings.open();
-        return;
-      }
-
-      // Ctrl+Tab / Ctrl+Shift+Tab: 标签页切换
-      if (e.ctrlKey && e.key === 'Tab') {
-        e.preventDefault();
-        if (e.shiftKey) {
-          this.tabManager.prevTab();
-        } else {
-          this.tabManager.nextTab();
+        // Ctrl+B: 切换左侧工作区侧边栏
+        if (e.ctrlKey && !e.shiftKey && !e.altKey && e.key.toLowerCase() === 'b') {
+          e.preventDefault();
+          e.stopPropagation();
+          this.workspaceManager?.toggleSidebar();
+          return;
         }
-        return;
-      }
 
-      // Alt+1 .. Alt+9: 快速直达标签页
-      if (e.altKey && e.key >= '1' && e.key <= '9') {
-        e.preventDefault();
-        const index = parseInt(e.key, 10) - 1;
-        const ids = Array.from(this.tabManager.tabs.keys());
-        if (ids[index]) {
-          this.tabManager.switchTab(ids[index]);
+        // Ctrl+Shift+T: 新建当前工作区标签页
+        if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 't') {
+          e.preventDefault();
+          e.stopPropagation();
+          const activeWs = this.workspaceManager ? this.workspaceManager.getActiveWorkspace() : null;
+          const spawnOpts = this.workspaceManager ? this.workspaceManager.getSpawnOptions(activeWs?.id) : {};
+          this.tabManager.createTab({
+            workspaceId: activeWs?.id,
+            title: spawnOpts.title,
+            cwd: spawnOpts.cwd,
+            shell: spawnOpts.shell,
+            args: spawnOpts.args,
+          });
+          return;
         }
-      }
-    });
+
+        // Ctrl+Shift+W: 关闭窗格
+        if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'w') {
+          e.preventDefault();
+          e.stopPropagation();
+          const tab = this.tabManager.getActiveTab();
+          if (tab && tab.splitTree.activeTerminal) {
+            tab.splitTree.closeTerminal(tab.splitTree.activeTerminal.id);
+          }
+          return;
+        }
+
+        // Ctrl+Shift+E: 水平分屏 (左右)
+        if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'e') {
+          e.preventDefault();
+          e.stopPropagation();
+          const tab = this.tabManager.getActiveTab();
+          if (tab) tab.splitTree.splitCurrent('horizontal');
+          return;
+        }
+
+        // Ctrl+Shift+O: 垂直分屏 (上下)
+        if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'o') {
+          e.preventDefault();
+          e.stopPropagation();
+          const tab = this.tabManager.getActiveTab();
+          if (tab) tab.splitTree.splitCurrent('vertical');
+          return;
+        }
+
+        // Ctrl+Shift+F: 搜索
+        if (e.ctrlKey && e.shiftKey && e.key.toLowerCase() === 'f') {
+          e.preventDefault();
+          e.stopPropagation();
+          this.toggleSearch();
+          return;
+        }
+
+        // Ctrl+,: 设置
+        if (e.ctrlKey && e.key === ',') {
+          e.preventDefault();
+          e.stopPropagation();
+          this.settings.open();
+          return;
+        }
+
+        // Ctrl+Tab / Ctrl+Shift+Tab: 标签页切换
+        if (e.ctrlKey && e.key === 'Tab') {
+          e.preventDefault();
+          e.stopPropagation();
+          if (e.shiftKey) {
+            this.tabManager.prevTab();
+          } else {
+            this.tabManager.nextTab();
+          }
+          return;
+        }
+
+        // Alt+1 .. Alt+9: 快速直达标签页
+        if (e.altKey && e.key >= '1' && e.key <= '9') {
+          e.preventDefault();
+          e.stopPropagation();
+          const index = parseInt(e.key, 10) - 1;
+          const ids = Array.from(this.tabManager.tabs.keys());
+          if (ids[index]) {
+            this.tabManager.switchTab(ids[index]);
+          }
+        }
+      },
+      true // 启用捕获阶段，确保终端即使在聚焦/输入状态下应用级快捷键也能被优先拦截响应
+    );
   }
 
   async initStatusBar() {
diff --git a/src/renderer/js/terminal-view.js b/src/renderer/js/terminal-view.js
index 503df40..a6fc868 100644
--- a/src/renderer/js/terminal-view.js
+++ b/src/renderer/js/terminal-view.js
@@ -75,6 +75,14 @@ export class TerminalView {
       console.warn('WebGL addon not supported, fallback to default Canvas renderer:', e);
     }
 
+    // 自定义按键过滤：允许应用级全局快捷键（如 Ctrl+B 切换侧边栏）穿透
+    this.xterm.attachCustomKeyEventHandler((event) => {
+      if (event.ctrlKey && !event.shiftKey && !event.altKey && event.key.toLowerCase() === 'b') {
+        return false;
+      }
+      return true;
+    });
+
     // 监听输入
     this.xterm.onData((data) => {
       window.terminalAPI.writePty(this.id, data);