diff --git a/src/app/application.cpp b/src/app/application.cpp
index 08c25f1..49fec5b 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -21,9 +21,6 @@ static const char* const kTag = "Application";
 Application::Application(int& argc, char** argv)
     : QApplication(argc, argv)
 {
-    LOG_INFO(kTag, QString("Impress Voice Input v%1 启动").arg(applicationVersion()));
-    LOG_INFO(kTag, QString("编译时间: %1 %2").arg(__DATE__).arg(__TIME__));
-
     configManager_ = std::make_unique<ConfigManager>(this);
     configManager_->loadDefaults();
 
@@ -84,8 +81,13 @@ void Application::loadGlobalModel() {
 void Application::applyTheme(const QString& theme) {
     s_currentTheme = theme;
 
-    // 1. 先设置风格（必须在 palette 和 stylesheet 之前）
+#ifdef Q_OS_WIN
+    // Windows 使用原生风格，避免 Fusion 的渲染问题
+    qApp->setStyle(QStyleFactory::create("windows"));
+#else
+    // 其他平台使用 Fusion
     qApp->setStyle(QStyleFactory::create("Fusion"));
+#endif
 
     // 2. 设置调色板
     QPalette palette;
@@ -153,7 +155,7 @@ void Application::applyFontSize(int size) {
 
 QIcon Application::createTrayIcon(bool active) {
     const QColor color = (s_currentTheme == "dark") ? Qt::white : Qt::black;
-    const int size = 16;
+    const int size = 22;
 
     QPixmap pixmap(size, size);
     pixmap.fill(Qt::transparent);
@@ -164,16 +166,19 @@ QIcon Application::createTrayIcon(bool active) {
 
     if (active) {
         // 播放图标（三角形）
-        const int margin = 3;
+        const int margin = 4;
         QPolygon triangle;
         triangle << QPoint(margin, margin)
                  << QPoint(margin, size - margin)
                  << QPoint(size - margin, size / 2);
         painter.drawPolygon(triangle);
     } else {
-        // 停止图标（正方形）
-        const int margin = 3;
-        painter.drawRect(margin, margin, size - 2 * margin, size - 2 * margin);
+        // 空闲图标（圆形轮廓，而非实心方块）
+        const int margin = 4;
+        const int radius = (size - 2 * margin) / 2;
+        const int cx = size / 2;
+        const int cy = size / 2;
+        painter.drawEllipse(QPoint(cx, cy), radius, radius);
     }
 
     return QIcon(pixmap);
diff --git a/src/main.cpp b/src/main.cpp
index 55f108d..730824e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -8,6 +8,56 @@
 #include <QStandardPaths>
 #include <QCommandLineParser>
 #include <QApplication>
+#include <QTimer>
+
+#ifdef Q_OS_WIN
+#include <windows.h>
+#include <string>
+
+static BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam) {
+    DWORD pid;
+    GetWindowThreadProcessId(hwnd, &pid);
+    if (pid != GetCurrentProcessId()) return TRUE;
+
+    wchar_t title[256];
+    GetWindowTextW(hwnd, title, 256);
+
+    RECT rect;
+    GetWindowRect(hwnd, &rect);
+
+    LONG style = GetWindowLong(hwnd, GWL_STYLE);
+    LONG exStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
+
+    bool hasTitleBar = (style & WS_CAPTION) != 0;
+    bool hasBorder = (style & WS_BORDER) != 0;
+    bool isChild = (style & WS_CHILD) != 0;
+    bool isVisible = IsWindowVisible(hwnd);
+    bool isTool = (exStyle & WS_EX_TOOLWINDOW) != 0;
+
+    std::wstring wTitle(title);
+    std::string utf8Title(wTitle.begin(), wTitle.end());
+
+    LOG_INFO("WindowEnum", QString("HWND=%1 标题=\"%2\" 位置=[%3,%4,%5,%6] 大小=%7x%8 "
+        "可见=%9 标题栏=%10 边框=%11 子窗口=%12 工具窗=%13")
+        .arg((qulonglong)hwnd)
+        .arg(QString::fromStdWString(wTitle))
+        .arg(rect.left).arg(rect.top).arg(rect.right).arg(rect.bottom)
+        .arg(rect.right - rect.left).arg(rect.bottom - rect.top)
+        .arg(isVisible ? "Y" : "N")
+        .arg(hasTitleBar ? "Y" : "N")
+        .arg(hasBorder ? "Y" : "N")
+        .arg(isChild ? "Y" : "N")
+        .arg(isTool ? "Y" : "N"));
+
+    return TRUE;
+}
+
+static void dumpAllWindows() {
+    LOG_INFO("WindowEnum", "===== 枚举进程所有窗口 =====");
+    EnumWindows(EnumWindowsProc, 0);
+    LOG_INFO("WindowEnum", "===== 窗口枚举结束 =====");
+}
+#endif
 
 int main(int argc, char* argv[])
 {
@@ -59,6 +109,15 @@ int main(int argc, char* argv[])
     QString logFilePath = effectiveLogDir + "/app.log";
     impress::Logger::init(logFilePath);
 
+    LOG_INFO("Main", QString("=== Impress Voice Input v%1 ===").arg(app.applicationVersion()));
+    LOG_INFO("Main", QString("编译时间: %1 %2").arg(__DATE__).arg(__TIME__));
+    LOG_INFO("Main", QString("Qt 版本: %1").arg(qVersion()));
+#ifdef Q_OS_WIN
+    LOG_INFO("Main", "平台: Windows");
+#elif defined(Q_OS_LINUX)
+    LOG_INFO("Main", "平台: Linux");
+#endif
+
     LOG_INFO("Main", QString("日志目录: %1").arg(effectiveLogDir));
 
     // 命令行覆盖模型路径
@@ -81,5 +140,18 @@ int main(int argc, char* argv[])
     impress::MainWindow mainWindow(configManager, app.sttEngine());
     mainWindow.show();
 
+#ifdef Q_OS_WIN
+    // 延迟 1 秒后枚举所有窗口，确保所有 Qt 内部窗口都已创建
+    QTimer::singleShot(1000, []() {
+        dumpAllWindows();
+    });
+
+    // 3 秒后再次枚举，检测是否有延迟创建的窗口
+    QTimer::singleShot(3000, []() {
+        LOG_INFO("WindowEnum", "===== 延迟 3 秒后再次枚举 =====");
+        dumpAllWindows();
+    });
+#endif
+
     return app.exec();
 }
diff --git a/src/ui/file_transcribe_page.cpp b/src/ui/file_transcribe_page.cpp
index 5ff9f0c..4810d9b 100644
--- a/src/ui/file_transcribe_page.cpp
+++ b/src/ui/file_transcribe_page.cpp
@@ -71,7 +71,7 @@ void FileTranscribePage::setupUI() {
     // 控制栏
     auto* controlLayout = new QHBoxLayout();
     startBtn_ = new QPushButton("开始转写", this);
-    startBtn_->setStyleSheet("QPushButton { font-weight: bold; padding: 8px 16px; }");
+    startBtn_->setObjectName("startTranscribeBtn");
     connect(startBtn_, &QPushButton::clicked, this, &FileTranscribePage::onStartTranscribe);
     controlLayout->addWidget(startBtn_);
 
diff --git a/src/ui/main_window.cpp b/src/ui/main_window.cpp
index d7ab01b..915167d 100644
--- a/src/ui/main_window.cpp
+++ b/src/ui/main_window.cpp
@@ -21,6 +21,50 @@
 #include <QCloseEvent>
 #include <QStyle>
 #include <QIcon>
+#include <QTimer>
+#include <QTabBar>
+#ifdef Q_OS_WIN
+#include <windows.h>
+
+// 枚举并隐藏 Qt 创建的多余工具窗口（无标题栏、无边框、非主窗口的 WS_EX_TOOLWINDOW）
+static BOOL CALLBACK HideQtToolWindows(HWND hwnd, LPARAM /*lParam*/) {
+    DWORD pid;
+    GetWindowThreadProcessId(hwnd, &pid);
+    if (pid != GetCurrentProcessId()) return TRUE;
+
+    LONG exStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
+    LONG style = GetWindowLong(hwnd, GWL_STYLE);
+
+    // 只找 WS_EX_TOOLWINDOW 的窗口
+    if ((exStyle & WS_EX_TOOLWINDOW) == 0) return TRUE;
+
+    // 排除有标题栏的窗口
+    bool hasTitleBar = (style & WS_CAPTION) != 0;
+    if (hasTitleBar) return TRUE;
+
+    // 排除子窗口
+    if (style & WS_CHILD) return TRUE;
+
+    // 获取窗口标题
+    wchar_t title[256];
+    int len = GetWindowTextW(hwnd, title, 256);
+
+    // 排除 Qt 标题栏窗口（_q_titlebar）
+    if (len > 0 && QString::fromWCharArray(title, len).startsWith("_q_")) return TRUE;
+
+    // 找到了可疑窗口，隐藏它
+    RECT rect;
+    GetWindowRect(hwnd, &rect);
+    LOG_INFO("MainWindow", QString("发现并隐藏 Qt 内部工具窗口: HWND=%1 标题=\"%2\" 大小=%3x%4")
+        .arg((qulonglong)hwnd)
+        .arg(len > 0 ? QString::fromWCharArray(title, len) : "(无标题)")
+        .arg(rect.right - rect.left)
+        .arg(rect.bottom - rect.top));
+
+    ShowWindow(hwnd, SW_HIDE);
+    return TRUE;
+}
+#endif
 
 static const char* const kTag = "MainWindow";
 
@@ -32,18 +76,33 @@ MainWindow::MainWindow(ConfigManager* configManager,
     : QMainWindow(parent)
     , configManager_(configManager)
 {
+    LOG_INFO(kTag, "MainWindow 构造函数开始");
+
     setWindowTitle("Impress Voice Input");
     resize(1000, 700);
 
     // 设置窗口图标
     setWindowIcon(QIcon(":/icons/app_icon.png"));
+    LOG_INFO(kTag, "窗口图标已设置");
 
+    LOG_INFO(kTag, "开始 setupUI");
     setupUI(sttEngine);
+    LOG_INFO(kTag, "setupUI 完成");
+
+    LOG_INFO(kTag, "开始 setupMenuBar");
     setupMenuBar();
+    LOG_INFO(kTag, "setupMenuBar 完成");
+
+    LOG_INFO(kTag, "开始 setupStatusBar");
     setupStatusBar(sttEngine);
+    LOG_INFO(kTag, "setupStatusBar 完成");
+
+    LOG_INFO(kTag, "开始 setupTrayIcon");
     setupTrayIcon();
+    LOG_INFO(kTag, "setupTrayIcon 完成");
 
     // 初始化语音输入服务（共享全局引擎）
+    LOG_INFO(kTag, "开始创建 VoiceInputService");
     voiceInputService_ = new VoiceInputService(configManager_, sttEngine, this);
     connect(voiceInputService_, &VoiceInputService::statusChanged,
             this, [this](const QString& status) {
@@ -58,13 +117,25 @@ MainWindow::MainWindow(ConfigManager* configManager,
             this, [this](const QString& text) {
                 LOG_INFO(kTag, QString("语音识别结果: %1").arg(text));
             });
+    LOG_INFO(kTag, "VoiceInputService 已创建");
 
     // 监听配置变化，动态启停语音输入服务
     connect(configManager_, &ConfigManager::configChanged,
             this, &MainWindow::onVoiceInputConfigChanged);
 
     // 启动时检查配置
+    LOG_INFO(kTag, "开始 onVoiceInputConfigChanged");
     onVoiceInputConfigChanged();
+    LOG_INFO(kTag, "onVoiceInputConfigChanged 完成");
+
+#ifdef Q_OS_WIN
+    // 延迟隐藏 Qt 在 Windows 上创建的额外工具窗口
+    QTimer::singleShot(500, this, []() {
+        LOG_INFO(kTag, "开始检查 Qt 内部工具窗口");
+        EnumWindows(HideQtToolWindows, 0);
+        LOG_INFO(kTag, "Qt 内部工具窗口检查完成");
+    });
+#endif
 
     LOG_INFO(kTag, "主窗口已创建");
 }
@@ -72,17 +143,35 @@ MainWindow::MainWindow(ConfigManager* configManager,
 MainWindow::~MainWindow() = default;
 
 void MainWindow::setupUI(SenseVoiceEngine* sttEngine) {
+    LOG_INFO(kTag, "setupUI: 创建 QTabWidget");
     tabWidget_ = new QTabWidget(this);
 
+    // 禁用可能导致额外窗口的功能
+    tabWidget_->setDocumentMode(true);
+    tabWidget_->setTabBarAutoHide(false);
+    tabWidget_->tabBar()->setExpanding(true);
+    tabWidget_->tabBar()->setMovable(false);
+    tabWidget_->tabBar()->setDrawBase(true);
+
+    LOG_INFO(kTag, "setupUI: 创建 STTTestPage");
     sttPage_ = new STTTestPage(configManager_, sttEngine, tabWidget_);
+    LOG_INFO(kTag, "setupUI: STTTestPage 创建完成");
+
+    LOG_INFO(kTag, "setupUI: 创建 FileTranscribePage");
     transcribePage_ = new FileTranscribePage(configManager_, sttEngine, tabWidget_);
+    LOG_INFO(kTag, "setupUI: FileTranscribePage 创建完成");
+
+    LOG_INFO(kTag, "setupUI: 创建 SettingsPage");
     settingsPage_ = new SettingsPage(configManager_, tabWidget_);
+    LOG_INFO(kTag, "setupUI: SettingsPage 创建完成");
 
     tabWidget_->addTab(sttPage_, "实时语音识别");
     tabWidget_->addTab(transcribePage_, "音频文件转写");
     tabWidget_->addTab(settingsPage_, "配置");
+    LOG_INFO(kTag, "setupUI: Tab 页面已添加");
 
     setCentralWidget(tabWidget_);
+    LOG_INFO(kTag, "setupUI: 完成");
 }
 
 void MainWindow::setupStatusBar(SenseVoiceEngine* sttEngine) {
diff --git a/src/ui/resources/styles/main.qss b/src/ui/resources/styles/main.qss
index d3d13ed..d9aa89b 100644
--- a/src/ui/resources/styles/main.qss
+++ b/src/ui/resources/styles/main.qss
@@ -13,6 +13,10 @@ QTabWidget::pane {
     background: #ffffff;
 }
 
+QTabWidget QStackedWidget {
+    background: #ffffff;
+}
+
 QTabBar::tab {
     background: #f5f5f5;
     border: 1px solid #e0e0e0;
@@ -70,6 +74,17 @@ QPushButton[text="保存配置"]:hover {
     background-color: #1565c0;
 }
 
+/* 录音按钮（动态属性 recording=true） */
+QPushButton[recording="true"] {
+    background-color: #e53935;
+    color: #ffffff;
+    border: 1px solid #e53935;
+}
+
+QPushButton[recording="true"]:hover {
+    background-color: #c62828;
+}
+
 /* 危险操作按钮 */
 QPushButton[text="停止"],
 QPushButton[text="停止录音"] {
@@ -241,8 +256,14 @@ QCheckBox::indicator:checked {
 QMenuBar {
     background-color: #ffffff;
     border-bottom: 1px solid #e0e0e0;
-    padding: 2px;
+    padding: 2px 4px;
     color: #333333;
+    spacing: 2px;
+}
+
+QMenuBar::item {
+    background-color: transparent;
+    padding: 4px 8px;
 }
 
 QMenuBar::item:selected {
@@ -250,6 +271,10 @@ QMenuBar::item:selected {
     color: #1976d2;
 }
 
+QMenuBar::item:pressed {
+    background-color: #bbdefb;
+}
+
 QMenu {
     background-color: #ffffff;
     border: 1px solid #e0e0e0;
diff --git a/src/ui/resources/styles/main_dark.qss b/src/ui/resources/styles/main_dark.qss
index 6b737f8..ce01016 100644
--- a/src/ui/resources/styles/main_dark.qss
+++ b/src/ui/resources/styles/main_dark.qss
@@ -14,6 +14,10 @@ QTabWidget::pane {
     background: #2a2a2a;
 }
 
+QTabWidget QStackedWidget {
+    background: #2a2a2a;
+}
+
 QTabBar::tab {
     background: #3a3a3a;
     border: 1px solid #555555;
@@ -70,6 +74,17 @@ QPushButton[text="保存配置"]:hover {
     background-color: #5a9aff;
 }
 
+/* 录音按钮（动态属性 recording=true） */
+QPushButton[recording="true"] {
+    background-color: #e74c3c;
+    color: #ffffff;
+    border: 1px solid #e74c3c;
+}
+
+QPushButton[recording="true"]:hover {
+    background-color: #f05e50;
+}
+
 /* 危险操作按钮 */
 QPushButton[text="停止"],
 QPushButton[text="停止录音"] {
diff --git a/src/ui/settings_page.cpp b/src/ui/settings_page.cpp
index 57d3a4d..a799dc3 100644
--- a/src/ui/settings_page.cpp
+++ b/src/ui/settings_page.cpp
@@ -44,6 +44,7 @@ void SettingsPage::setupUI() {
     scrollArea->setFrameShape(QFrame::NoFrame);
 
     auto* contentWidget = new QWidget(scrollArea);
+    contentWidget->setAttribute(Qt::WA_StyledBackground, true);
     auto* contentLayout = new QVBoxLayout(contentWidget);
     contentLayout->setContentsMargins(12, 8, 12, 8);
     contentLayout->setSpacing(12);
@@ -221,7 +222,7 @@ void SettingsPage::setupUI() {
     btnLayout->setContentsMargins(12, 4, 12, 8);
 
     auto* saveBtn = new QPushButton("保存配置", btnBar);
-    saveBtn->setStyleSheet("QPushButton { font-weight: bold; padding: 8px 16px; }");
+    saveBtn->setObjectName("saveBtn");
     connect(saveBtn, &QPushButton::clicked, this, &SettingsPage::onSaveConfig);
     btnLayout->addWidget(saveBtn);
 
diff --git a/src/ui/stt_test_page.cpp b/src/ui/stt_test_page.cpp
index cf8600d..fb3eee4 100644
--- a/src/ui/stt_test_page.cpp
+++ b/src/ui/stt_test_page.cpp
@@ -63,8 +63,8 @@ void STTTestPage::setupUI() {
 
     auto* btnLayout = new QHBoxLayout();
     recordBtn_ = new QPushButton("开始录音", this);
+    recordBtn_->setObjectName("recordBtn");
     recordBtn_->setMinimumWidth(120);
-    recordBtn_->setStyleSheet("QPushButton { font-weight: bold; padding: 8px 16px; }");
     connect(recordBtn_, &QPushButton::clicked, this, &STTTestPage::onToggleRecording);
     btnLayout->addWidget(recordBtn_);
 
@@ -103,10 +103,17 @@ void STTTestPage::setupUI() {
 
 void STTTestPage::updateUIState() {
     recordBtn_->setText(isRecording_ ? "停止录音" : "开始录音");
-    recordBtn_->setStyleSheet(isRecording_
-        ? "QPushButton { font-weight: bold; padding: 8px 16px; background-color: #e74c3c; color: white; }"
-        : "QPushButton { font-weight: bold; padding: 8px 16px; }");
+    recordBtn_->setProperty("recording", isRecording_);
+    recordBtn_->style()->unpolish(recordBtn_);
+    recordBtn_->style()->polish(recordBtn_);
     deviceCombo_->setEnabled(!isRecording_ && !isLoadingModel_);
+
+    // 状态标签颜色
+    if (isRecording_) {
+        statusLabel_->setStyleSheet("color: #e74c3c;");
+    } else {
+        statusLabel_->setStyleSheet("color: gray;");
+    }
 }
 
 void STTTestPage::onToggleRecording() {
diff --git a/src/ui/widgets/audio_waveform.cpp b/src/ui/widgets/audio_waveform.cpp
index efc7f94..1bf9ba0 100644
--- a/src/ui/widgets/audio_waveform.cpp
+++ b/src/ui/widgets/audio_waveform.cpp
@@ -1,4 +1,5 @@
 #include "audio_waveform.h"
+#include "app/application.h"
 #include <QPainter>
 #include <QPainterPath>
 #include <algorithm>
@@ -24,8 +25,12 @@ void AudioWaveform::paintEvent(QPaintEvent* /*event*/) {
     QPainter painter(this);
     painter.setRenderHint(QPainter::Antialiasing);
 
+    // 根据主题选择背景色
+    const QColor bgColor = Application::isDarkTheme()
+        ? QColor(42, 42, 42) : QColor(245, 245, 245);
+
     // 背景
-    painter.fillRect(rect(), QColor(245, 245, 245));
+    painter.fillRect(rect(), bgColor);
 
     if (samples_.isEmpty()) {
         painter.setPen(QColor(180, 180, 180));