diff --git a/lib/modules/meeting/controllers/mind_map_controller.dart b/lib/modules/meeting/controllers/mind_map_controller.dart
index 09b91b613..4a155382a 100644
--- a/lib/modules/meeting/controllers/mind_map_controller.dart
+++ b/lib/modules/meeting/controllers/mind_map_controller.dart
@@ -41,6 +41,15 @@ class MindMapController extends GetxController {
   <script>${_meetingDetailsController.markmapToolbarJs}</script>
   <script>${_meetingDetailsController.saveSvgAsPngJs}</script>
   <style>
+    :root {
+      --bg-color: #FFFFFF;
+      --text-color: #000000;
+      --toolbar-bg: #FFFFFF;
+      --toolbar-border: #d0d5dd;
+      --toolbar-text: #101828;
+      --toolbar-active: #d4d4d8;
+    }
+
     html,
     body {
       width: 100%;
@@ -50,6 +59,8 @@ class MindMapController extends GetxController {
       margin: 0;
       padding: 0;
       overflow: hidden;
+      background-color: var(--bg-color);
+      transition: background-color 0.3s ease;
     }
 
     .mind-map {
@@ -64,10 +75,15 @@ class MindMapController extends GetxController {
       height: 100%;
     }
 
+    .mind-map #markmap .markmap-node-text {
+      fill: var(--text-color) !important;
+      transition: fill 0.3s ease;
+    }
+
     .mind-map .mm-toolbar {
       height: 30px;
-      background: #fff;
-      border: 1px solid #d0d5dd;
+      background: var(--toolbar-bg);
+      border: 1px solid var(--toolbar-border);
       border-radius: 8px;
       display: flex;
       justify-content: space-around;
@@ -75,6 +91,7 @@ class MindMapController extends GetxController {
       position: absolute;
       top: 10px;
       right: 2px;
+      transition: background 0.3s ease, border-color 0.3s ease;
     }
 
     .mind-map .mm-toolbar-item {
@@ -82,14 +99,15 @@ class MindMapController extends GetxController {
       height: 24px;
       border-radius: 6px;
       cursor: pointer;
-      color: #101828;
+      color: var(--toolbar-text);
       display: flex;
       justify-content: center;
       align-items: center;
+      transition: color 0.3s ease;
     }
 
     .mind-map .mm-toolbar-item.active {
-      background-color: #d4d4d8;
+      background-color: var(--toolbar-active);
     }
   </style>
 </head>
@@ -108,7 +126,9 @@ class MindMapController extends GetxController {
       initialExpandLevel: 3,
     }, root);
     const toolbar = Toolbar.create(mm);
-    toolbar.showBrand = false
+    toolbar.showBrand = false;
+    // 只保留放大、缩小、适配窗口、递归展开；移除自带的 dark 按钮
+    toolbar.setItems(['zoomIn', 'zoomOut', 'fit', 'recurse']);
     toolbar.render();
     const el = toolbar.el;
     const toolbarElement = document.getElementById('toolbar');
@@ -120,13 +140,40 @@ class MindMapController extends GetxController {
       await mm.fit();
     }
 
+    // 动态切换主题颜色
+    window.updateTheme = function(isDark) {
+      const r = document.documentElement;
+      if (isDark) {
+        // 确保 markmap 内部暗色样式与 App 暗色主题一致
+        r.classList.add('markmap-dark');
+        r.style.setProperty('--bg-color', '#121212');
+        r.style.setProperty('--text-color', '#FFFFFF');
+        r.style.setProperty('--toolbar-bg', '#2D2D2D');
+        r.style.setProperty('--toolbar-border', '#404040');
+        r.style.setProperty('--toolbar-text', '#FFFFFF');
+        r.style.setProperty('--toolbar-active', '#404040');
+      } else {
+        // 还原为浅色主题
+        r.classList.remove('markmap-dark');
+        r.style.setProperty('--bg-color', '#FFFFFF');
+        r.style.setProperty('--text-color', '#000000');
+        r.style.setProperty('--toolbar-bg', '#FFFFFF');
+        r.style.setProperty('--toolbar-border', '#d0d5dd');
+        r.style.setProperty('--toolbar-text', '#101828');
+        r.style.setProperty('--toolbar-active', '#d4d4d8');
+      }
+      // 保存当前主题用于截图
+      window._isDarkTheme = isDark;
+    }
+
     window.captureImage = async function() {
       const markmapElement = document.getElementById('markmap');
       markmapElement.style.height = `${_width}px`;
       await mm.fit();
+      const bgColor = window._isDarkTheme ? '#121212' : '#FFFFFF';
       const options = {
         scale: 2,
-        backgroundColor: '#FFFFFF',
+        backgroundColor: bgColor,
         encoderOptions: 1,
       };
       const uri = await svgAsPngUri(markmapElement, options);
@@ -147,6 +194,8 @@ class MindMapController extends GetxController {
         NavigationDelegate(
           onPageFinished: (String url) {
             isWebViewReady = true;
+            // 页面加载完成后立即应用当前主题
+            _applyCurrentTheme();
           },
         ),
       )
@@ -163,6 +212,18 @@ class MindMapController extends GetxController {
     });
   }
 
+  /// 应用当前主题到 WebView
+  void _applyCurrentTheme() {
+    if (!isWebViewReady) return;
+    final isDark = Get.isDarkMode;
+    webViewController.runJavaScript('updateTheme($isDark)');
+  }
+
+  /// 供外部调用的主题更新方法
+  void updateTheme() {
+    _applyCurrentTheme();
+  }
+
   @override
   void onClose() {
     _summaryNumberListener.dispose();
diff --git a/lib/modules/meeting/views/tabs/mind_map_tab.dart b/lib/modules/meeting/views/tabs/mind_map_tab.dart
index c4e92fc08..8811dd7ea 100644
--- a/lib/modules/meeting/views/tabs/mind_map_tab.dart
+++ b/lib/modules/meeting/views/tabs/mind_map_tab.dart
@@ -15,9 +15,23 @@ class _MindMapTabState extends State<MindMapTab>
     with AutomaticKeepAliveClientMixin {
   final _controller = Get.find<MindMapController>();
 
+  // 缓存上一次的主题模式，用于检测变化
+  Brightness? _lastBrightness;
+
   @override
   bool get wantKeepAlive => true;
 
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final currentBrightness = Theme.of(context).brightness;
+    // 仅在主题实际变化时通知控制器更新 WebView
+    if (_lastBrightness != null && _lastBrightness != currentBrightness) {
+      _controller.updateTheme();
+    }
+    _lastBrightness = currentBrightness;
+  }
+
   @override
   Widget build(BuildContext context) {
     super.build(context);