diff --git a/docs/plan/Unity式Tick系统与PlayMode运行时方案-阶段进展.md b/docs/plan/Unity式Tick系统与PlayMode运行时方案-阶段进展.md
index d2595d17..6f42f794 100644
--- a/docs/plan/Unity式Tick系统与PlayMode运行时方案-阶段进展.md
+++ b/docs/plan/Unity式Tick系统与PlayMode运行时方案-阶段进展.md
@@ -28,11 +28,21 @@
 - `Paused` 下维持 runtime world，不回退到 editor scene
 - `Step` 现在只在 `Paused` 下有效，并保持 `Paused` 状态不变
 
+### 阶段 D 当前收口
+
+- 已在软件顶部增加独立运行栏
+- 运行栏已接入 `Play / Stop / Step` 三个图标按钮
+- 顶部按钮直接复用现有 PlayMode 请求通道，不额外分叉状态机
+- `Play` 仅在 `Edit` 且存在活动场景时可用
+- `Stop` 在 `Play / Paused` 下可用
+- `Step` 仍只在 `Paused` 下可用，`Pause / Resume` 继续走 `Run` 菜单与 `F6`
+
 ## 本轮验证
 
 - 已重新执行 `cmake -S . -B build`
 - 已通过 `cmake --build build --config Debug --target scene_tests`
 - 已通过 `cmake --build build --config Debug --target editor_tests -- /m:1 /v:minimal`
+- 已通过 `cmake --build build --config Debug --target XCEditor -- /m:1 /v:minimal`
 - 已通过聚焦测试：
   `ctest --test-dir build -C Debug --output-on-failure -j1 -R "RuntimeLoopTest|PlaySessionControllerTest|EditorActionRoutingTest.*PlayMode|EditorActionRoutingTest.*MainMenuRouterRequestsPlayPauseResumeAndStepEvents"`
 
diff --git a/editor/CMakeLists.txt b/editor/CMakeLists.txt
index 9020786c..078ac87d 100644
--- a/editor/CMakeLists.txt
+++ b/editor/CMakeLists.txt
@@ -102,6 +102,7 @@ target_compile_definitions(${PROJECT_NAME} PRIVATE UNICODE _UNICODE)
 target_compile_options(${PROJECT_NAME} PRIVATE /utf-8)
 
 if(MSVC)
+    target_compile_options(${PROJECT_NAME} PRIVATE /FS)
     set_property(TARGET ${PROJECT_NAME} PROPERTY
         MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
 endif()
diff --git a/editor/src/Actions/EditorActions.h b/editor/src/Actions/EditorActions.h
index bb500881..c4c21884 100644
--- a/editor/src/Actions/EditorActions.h
+++ b/editor/src/Actions/EditorActions.h
@@ -176,6 +176,26 @@ inline ActionBinding MakeTogglePlayModeAction(EditorRuntimeMode mode, bool enabl
         Shortcut(ImGuiKey_F5));
 }
 
+inline ActionBinding MakeStartPlayModeAction(EditorRuntimeMode mode, bool hasActiveScene = true) {
+    return MakeAction(
+        "Play",
+        "F5",
+        IsEditorRuntimeActive(mode),
+        mode == EditorRuntimeMode::Edit && hasActiveScene,
+        false,
+        Shortcut(ImGuiKey_F5));
+}
+
+inline ActionBinding MakeStopPlayModeAction(EditorRuntimeMode mode) {
+    return MakeAction(
+        "Stop",
+        "F5",
+        false,
+        IsEditorRuntimeActive(mode),
+        false,
+        Shortcut(ImGuiKey_F5));
+}
+
 inline ActionBinding MakeTogglePauseModeAction(EditorRuntimeMode mode, bool enabled = true) {
     const bool paused = mode == EditorRuntimeMode::Paused;
     return MakeAction(
diff --git a/editor/src/Actions/MainMenuActionRouter.h b/editor/src/Actions/MainMenuActionRouter.h
index 0b976521..18b132e7 100644
--- a/editor/src/Actions/MainMenuActionRouter.h
+++ b/editor/src/Actions/MainMenuActionRouter.h
@@ -62,15 +62,31 @@ inline void RequestDockLayoutReset(IEditorContext& context) {
     context.GetEventBus().Publish(DockLayoutResetRequestedEvent{});
 }
 
-inline void RequestTogglePlayMode(IEditorContext& context) {
-    if (context.GetRuntimeMode() == EditorRuntimeMode::Edit) {
-        context.GetEventBus().Publish(PlayModeStartRequestedEvent{});
+inline void RequestStartPlayMode(IEditorContext& context) {
+    if (context.GetRuntimeMode() != EditorRuntimeMode::Edit) {
+        return;
+    }
+
+    context.GetEventBus().Publish(PlayModeStartRequestedEvent{});
+}
+
+inline void RequestStopPlayMode(IEditorContext& context) {
+    if (!IsEditorRuntimeActive(context.GetRuntimeMode())) {
         return;
     }
 
     context.GetEventBus().Publish(PlayModeStopRequestedEvent{});
 }
 
+inline void RequestTogglePlayMode(IEditorContext& context) {
+    if (context.GetRuntimeMode() == EditorRuntimeMode::Edit) {
+        RequestStartPlayMode(context);
+        return;
+    }
+
+    RequestStopPlayMode(context);
+}
+
 inline void RequestTogglePauseMode(IEditorContext& context) {
     if (context.GetRuntimeMode() == EditorRuntimeMode::Play) {
         context.GetEventBus().Publish(PlayModePauseRequestedEvent{});
diff --git a/editor/src/panels/MenuBar.cpp b/editor/src/panels/MenuBar.cpp
index 91db2ca5..68efcb1d 100644
--- a/editor/src/panels/MenuBar.cpp
+++ b/editor/src/panels/MenuBar.cpp
@@ -3,11 +3,108 @@
 #include "Actions/MainMenuActionRouter.h"
 #include "MenuBar.h"
 #include "Core/IEditorContext.h"
+#include "Platform/Win32Utf8.h"
+#include "UI/UI.h"
 #include <imgui.h>
+#include <imgui_internal.h>
+
+#include <algorithm>
+#include <array>
+#include <filesystem>
 
 namespace XCEngine {
 namespace Editor {
 
+namespace {
+
+constexpr float kRunToolbarHeight = 40.0f;
+constexpr float kRunToolbarButtonExtent = 28.0f;
+constexpr float kRunToolbarButtonSpacing = 10.0f;
+constexpr float kRunToolbarIconInset = 5.0f;
+
+std::string BuildRunToolbarIconPath(const char* fileName) {
+    const std::filesystem::path exeDir(
+        Platform::Utf8ToWide(Platform::GetExecutableDirectoryUtf8()));
+    const std::filesystem::path iconPath =
+        (exeDir / L".." / L".." / L"resources" / L"Icons" /
+         std::filesystem::path(Platform::Utf8ToWide(fileName)))
+            .lexically_normal();
+    return Platform::WideToUtf8(iconPath.wstring());
+}
+
+const std::string& GetRunToolbarIconPath(size_t index) {
+    static const std::array<const char*, 3> kFileNames = {
+        "play_button.png",
+        "stop_button.png",
+        "step_button.png"
+    };
+    static std::array<std::string, kFileNames.size()> s_cachedPaths = {};
+
+    std::string& cachedPath = s_cachedPaths[index];
+    if (!cachedPath.empty()) {
+        return cachedPath;
+    }
+
+    cachedPath = BuildRunToolbarIconPath(kFileNames[index]);
+    return cachedPath;
+}
+
+bool DrawRunToolbarIconButton(
+    const char* id,
+    const Actions::ActionBinding& action,
+    const std::string& iconPath,
+    const char* fallbackGlyph) {
+    ImGui::BeginDisabled(!action.enabled);
+    ImGui::PushID(id);
+
+    const ImVec2 buttonSize(kRunToolbarButtonExtent, kRunToolbarButtonExtent);
+    const ImVec2 buttonMin = ImGui::GetCursorScreenPos();
+    const bool pressed = ImGui::InvisibleButton("##RunToolbarButton", buttonSize);
+    const ImVec2 buttonMax(buttonMin.x + buttonSize.x, buttonMin.y + buttonSize.y);
+    const bool hovered = ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled);
+    const bool held = ImGui::IsItemActive();
+
+    ImDrawList* drawList = ImGui::GetWindowDrawList();
+    if (drawList != nullptr) {
+        const ImU32 fillColor = ImGui::GetColorU32(
+            held ? UI::ToolbarButtonActiveColor()
+                 : hovered ? UI::ToolbarButtonHoveredColor(action.selected)
+                           : UI::ToolbarButtonColor(action.selected));
+        const ImU32 borderColor = IM_COL32(255, 255, 255, action.selected ? 56 : 28);
+        drawList->AddRectFilled(buttonMin, buttonMax, fillColor, 5.0f);
+        drawList->AddRect(buttonMin, buttonMax, borderColor, 5.0f, 0, 1.0f);
+
+        const ImVec2 iconMin(buttonMin.x + kRunToolbarIconInset, buttonMin.y + kRunToolbarIconInset);
+        const ImVec2 iconMax(buttonMax.x - kRunToolbarIconInset, buttonMax.y - kRunToolbarIconInset);
+        if (!UI::DrawTextureAssetPreview(drawList, iconMin, iconMax, iconPath)) {
+            const ImVec2 textSize = ImGui::CalcTextSize(fallbackGlyph);
+            drawList->AddText(
+                ImVec2(
+                    buttonMin.x + (buttonSize.x - textSize.x) * 0.5f,
+                    buttonMin.y + (buttonSize.y - textSize.y) * 0.5f),
+                ImGui::GetColorU32(ImVec4(0.88f, 0.88f, 0.88f, 1.0f)),
+                fallbackGlyph);
+        }
+    }
+
+    if (hovered) {
+        UI::BeginTitledTooltip(action.label.c_str());
+        if (!action.shortcutLabel.empty()) {
+            ImGui::Text("Shortcut: %s", action.shortcutLabel.c_str());
+        }
+        if (!action.enabled && action.label == "Step") {
+            ImGui::TextUnformatted("Available while runtime is paused.");
+        }
+        UI::EndTitledTooltip();
+    }
+
+    ImGui::PopID();
+    ImGui::EndDisabled();
+    return action.enabled && pressed;
+}
+
+} // namespace
+
 MenuBar::MenuBar() : Panel("MenuBar") {}
 
 void MenuBar::Render() {
@@ -17,8 +114,69 @@ void MenuBar::Render() {
 
     Actions::HandleMenuBarShortcuts(*m_context);
     Actions::DrawMainMenuBar(*m_context, m_aboutPopup);
+    RenderRunToolbar();
     Actions::DrawMainMenuOverlays(m_context, m_aboutPopup);
 }
 
+void MenuBar::RenderRunToolbar() {
+    ImGuiViewport* viewport = ImGui::GetMainViewport();
+    if (viewport == nullptr) {
+        return;
+    }
+
+    constexpr ImGuiWindowFlags kWindowFlags =
+        ImGuiWindowFlags_NoScrollbar |
+        ImGuiWindowFlags_NoScrollWithMouse |
+        ImGuiWindowFlags_NoSavedSettings |
+        ImGuiWindowFlags_NoDocking |
+        ImGuiWindowFlags_NoTitleBar |
+        ImGuiWindowFlags_NoResize |
+        ImGuiWindowFlags_NoMove |
+        ImGuiWindowFlags_NoNavFocus;
+
+    ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(12.0f, 6.0f));
+    ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
+    ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
+    ImGui::PushStyleColor(ImGuiCol_WindowBg, UI::ToolbarBackgroundColor());
+    const bool open =
+        ImGui::BeginViewportSideBar("##MainRunToolbar", viewport, ImGuiDir_Up, kRunToolbarHeight, kWindowFlags);
+    ImGui::PopStyleColor();
+    ImGui::PopStyleVar(3);
+
+    if (open) {
+        const Actions::ActionBinding playAction =
+            Actions::MakeStartPlayModeAction(m_context->GetRuntimeMode(), m_context->GetSceneManager().HasActiveScene());
+        const Actions::ActionBinding stopAction = Actions::MakeStopPlayModeAction(m_context->GetRuntimeMode());
+        const Actions::ActionBinding stepAction =
+            Actions::MakeStepPlayModeAction(m_context->GetRuntimeMode() == EditorRuntimeMode::Paused);
+
+        const float totalWidth =
+            kRunToolbarButtonExtent * 3.0f + kRunToolbarButtonSpacing * 2.0f;
+        const float startX =
+            ImGui::GetCursorPosX() + (std::max)(0.0f, (ImGui::GetContentRegionAvail().x - totalWidth) * 0.5f);
+        const float startY =
+            (std::max)(ImGui::GetCursorPosY(), (ImGui::GetWindowHeight() - kRunToolbarButtonExtent) * 0.5f);
+        ImGui::SetCursorPos(ImVec2(startX, startY));
+
+        if (DrawRunToolbarIconButton("Play", playAction, GetRunToolbarIconPath(0), "P")) {
+            Actions::RequestStartPlayMode(*m_context);
+        }
+
+        ImGui::SameLine(0.0f, kRunToolbarButtonSpacing);
+        if (DrawRunToolbarIconButton("Stop", stopAction, GetRunToolbarIconPath(1), "S")) {
+            Actions::RequestStopPlayMode(*m_context);
+        }
+
+        ImGui::SameLine(0.0f, kRunToolbarButtonSpacing);
+        if (DrawRunToolbarIconButton("Step", stepAction, GetRunToolbarIconPath(2), ">")) {
+            Actions::RequestStepPlayMode(*m_context);
+        }
+
+        UI::DrawCurrentWindowBottomBorder();
+    }
+
+    ImGui::End();
+}
+
 }
 }
diff --git a/editor/src/panels/MenuBar.h b/editor/src/panels/MenuBar.h
index d8acc8e0..a41e84f4 100644
--- a/editor/src/panels/MenuBar.h
+++ b/editor/src/panels/MenuBar.h
@@ -12,6 +12,8 @@ public:
     void Render() override;
 
 private:
+    void RenderRunToolbar();
+
     UI::DeferredPopupState m_aboutPopup;
 };