diff --git a/src/renderer/css/app.css b/src/renderer/css/app.css
index 9f758ce..b9857d9 100644
--- a/src/renderer/css/app.css
+++ b/src/renderer/css/app.css
@@ -45,9 +45,9 @@ body {
 .titlebar-left {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 6px;
   overflow: hidden;
-  -webkit-app-region: drag; /* 允许左侧空白和品牌区域拖拽 */
+  -webkit-app-region: no-drag; /* 允许子元素正常响应鼠标交互 */
 }
 
 .app-brand {
@@ -61,6 +61,7 @@ body {
   letter-spacing: 0.5px;
   -webkit-app-region: drag;
   cursor: grab;
+  flex-shrink: 0;
 }
 
 .titlebar-drag-spacer {
@@ -95,6 +96,8 @@ body {
   justify-content: center;
   cursor: pointer;
   transition: all 0.15s ease;
+  -webkit-app-region: no-drag !important;
+  flex-shrink: 0;
 }
 
 .btn-icon:hover {
diff --git a/src/renderer/css/sidebar.css b/src/renderer/css/sidebar.css
index 04ea2b0..61a6a6a 100644
--- a/src/renderer/css/sidebar.css
+++ b/src/renderer/css/sidebar.css
@@ -370,3 +370,59 @@
 .btn-secondary:hover {
   background: var(--bg-tab-hover);
 }
+
+/* 顶部栏切换按钮高亮 */
+.btn-toggle-sidebar {
+  -webkit-app-region: no-drag !important;
+  flex-shrink: 0;
+  cursor: pointer;
+  position: relative;
+  z-index: 10;
+}
+
+.btn-toggle-sidebar.active {
+  color: var(--accent-color);
+  background: var(--btn-hover, rgba(255, 255, 255, 0.08));
+}
+
+/* 侧边栏折叠时的浮动快捷呼出按钮 */
+.sidebar-floating-toggle {
+  display: none;
+  position: absolute;
+  top: 10px;
+  left: 10px;
+  z-index: 35;
+  background: var(--bg-titlebar);
+  border: 1px solid var(--border-color);
+  border-radius: var(--border-radius-sm);
+  color: var(--text-muted);
+  font-size: 11px;
+  padding: 4px 10px;
+  cursor: pointer;
+  align-items: center;
+  gap: 5px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+  opacity: 0;
+  pointer-events: none;
+  transform: translateX(-15px);
+}
+
+.app-body.sidebar-collapsed .sidebar-floating-toggle,
+.workspace-sidebar.collapsed ~ .sidebar-floating-toggle {
+  display: flex;
+  opacity: 0.9;
+  pointer-events: auto;
+  transform: translateX(0);
+}
+
+.sidebar-floating-toggle:hover {
+  opacity: 1;
+  background: var(--bg-tab-hover);
+  color: var(--accent-color);
+  border-color: var(--border-active);
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5), 0 0 10px var(--accent-glow);
+}
+
diff --git a/src/renderer/index.html b/src/renderer/index.html
index be9f2cf..ff7bf94 100644
--- a/src/renderer/index.html
+++ b/src/renderer/index.html
@@ -21,7 +21,7 @@
     <header class="titlebar">
       <div class="titlebar-left">
         <!-- 侧边栏折叠/展开按钮 -->
-        <button class="btn-icon" id="btn-toggle-sidebar" title="切换工作区侧边栏 (Ctrl+B)">
+        <button class="btn-icon btn-toggle-sidebar" id="btn-toggle-sidebar" title="切换工作区侧边栏 (Ctrl+B)">
           <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
             <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
             <line x1="9" y1="3" x2="9" y2="21"></line>
@@ -139,6 +139,14 @@
         </div>
       </aside>
 
+      <!-- 折叠时的浮动快捷呼出按钮 -->
+      <button class="sidebar-floating-toggle" id="sidebar-floating-toggle" title="展开工作区侧边栏 (Ctrl+B)">
+        <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          <polyline points="9 18 15 12 9 6"></polyline>
+        </svg>
+        <span>工作区</span>
+      </button>
+
       <!-- 终端主视口 -->
       <main class="main-viewport" id="main-viewport"></main>
     </div>
diff --git a/src/renderer/js/workspace-manager.js b/src/renderer/js/workspace-manager.js
index 89c3e7e..c032652 100644
--- a/src/renderer/js/workspace-manager.js
+++ b/src/renderer/js/workspace-manager.js
@@ -87,6 +87,15 @@ export class WorkspaceManager {
     this.initEventListeners();
     this.renderSidebar();
 
+    const toggleBtn = document.getElementById('btn-toggle-sidebar');
+    if (toggleBtn) {
+      toggleBtn.classList.toggle('active', !this.isCollapsed);
+    }
+    const appBody = document.querySelector('.app-body');
+    if (appBody && this.isCollapsed) {
+      appBody.classList.add('sidebar-collapsed');
+    }
+
     // 订阅标签页状态变更，以便实时刷新侧边栏标签列表
     this.tabManager.onTabListChange = () => {
       this.renderSidebar();
@@ -135,14 +144,22 @@ export class WorkspaceManager {
 
   initEventListeners() {
     // 侧边栏折叠/展开按钮
-    document.getElementById('btn-toggle-sidebar')?.addEventListener('click', () => {
+    document.getElementById('btn-toggle-sidebar')?.addEventListener('click', (e) => {
+      e.stopPropagation();
       this.toggleSidebar();
     });
 
-    document.getElementById('btn-collapse-sidebar')?.addEventListener('click', () => {
+    document.getElementById('btn-collapse-sidebar')?.addEventListener('click', (e) => {
+      e.stopPropagation();
       this.setCollapsed(true);
     });
 
+    // 浮动快捷呼出按钮
+    document.getElementById('sidebar-floating-toggle')?.addEventListener('click', (e) => {
+      e.stopPropagation();
+      this.setCollapsed(false);
+    });
+
     // 新建工作区按钮
     document.getElementById('btn-add-workspace')?.addEventListener('click', () => {
       this.openCreateModal();
@@ -181,6 +198,14 @@ export class WorkspaceManager {
     if (this.sidebar) {
       this.sidebar.classList.toggle('collapsed', collapsed);
     }
+    const appBody = document.querySelector('.app-body');
+    if (appBody) {
+      appBody.classList.toggle('sidebar-collapsed', collapsed);
+    }
+    const toggleBtn = document.getElementById('btn-toggle-sidebar');
+    if (toggleBtn) {
+      toggleBtn.classList.toggle('active', !collapsed);
+    }
     this.saveWorkspaces();
 
     // 触发当前终端自适应尺寸