diff --git a/Include/nmNum/nmRender/nmVTKScalarBarLayer.h b/Include/nmNum/nmRender/nmVTKScalarBarLayer.h
index ad8c6284..3227ded3 100644
--- a/Include/nmNum/nmRender/nmVTKScalarBarLayer.h
+++ b/Include/nmNum/nmRender/nmVTKScalarBarLayer.h
@@ -43,6 +43,13 @@ public:
     bool setNumberOfLabels(int nLabelCount);
     /** @brief 返回当前普通刻度数量。 */
     int getNumberOfLabels() const;
+    /**
+     * @brief 按 QVTK 视口像素尺寸更新固定宽度的响应式二维布局。
+     * @note 只修改 Actor 布局，不主动 Render，也不修改 LookupTable。
+     */
+    bool setViewportSize(int nWidth, int nHeight);
+    /** @brief 返回当前视口和色带高度建议使用的普通刻度数量。 */
+    int getResponsiveLabelCount() const;
 
     /** @brief 配置低于显示范围的独立二维色块和说明文字。 */
     void setBelowRangeSwatch(bool bVisible, const QString& sText);
@@ -76,6 +83,7 @@ private:
     vtkSmartPointer<vtkLookupTable> m_pLookupTable; ///< 共享外部颜色表引用。
     vtkSmartPointer<vtkPropAssembly> m_pRootAssembly; ///< Scene 挂载的稳定根 Prop。
     vtkSmartPointer<vtkScalarBarActor> m_pActor; ///< 图层独占的二维色标 Actor。
+    vtkSmartPointer<vtkTextActor> m_pTitleActor; ///< 独立左对齐 ASCII 标题。
     vtkSmartPointer<vtkTextActor> m_pConstantValueActor; ///< 常量属性唯一值文字。
     vtkSmartPointer<vtkPoints> m_pBelowRangeSwatchPoints; ///< 下越界色块四角坐标。
     vtkSmartPointer<vtkActor2D> m_pBelowRangeSwatchActor; ///< 下越界独立色块。
@@ -92,6 +100,8 @@ private:
     double m_dPositionY; ///< 色标左下角的归一化视口 Y 坐标。
     double m_dWidth; ///< 色标在归一化视口中的宽度。
     double m_dHeight; ///< 色标在归一化视口中的高度。
+    int m_nViewportWidth; ///< 最近一次有效 QVTK 视口像素宽度。
+    int m_nViewportHeight; ///< 最近一次有效 QVTK 视口像素高度。
 };
 
 #endif // NMVTKSCALARBARLAYER_H
diff --git a/Include/nmNum/nmRender/nmWxVTKRenderContainerWidget.h b/Include/nmNum/nmRender/nmWxVTKRenderContainerWidget.h
index 96af9036..49b7fb4e 100644
--- a/Include/nmNum/nmRender/nmWxVTKRenderContainerWidget.h
+++ b/Include/nmNum/nmRender/nmWxVTKRenderContainerWidget.h
@@ -4,6 +4,7 @@
 #include "nmRender_global.h"
 #include "nmVTKViewCommandController.h"
 
+#include <QSize>
 #include <QWidget>
 #include <vtkSmartPointer.h>
 
@@ -47,6 +48,8 @@ public:
 
     /** @brief 返回 Qt 承载控件；调用方不得删除或重新设置父对象。 */
     QVTKWidget* getVtkWidget() const;
+    /** @brief 返回当前 QVTK 视口的 Qt 像素尺寸；控件不可用时返回空尺寸。 */
+    QSize getViewportSize() const;
     /** @brief 返回当前容器独占的 Renderer 非所有权指针。 */
     vtkRenderer* getRenderer() const;
     /** @brief 返回 QVTKWidget 持有的 RenderWindow 非所有权指针。 */
@@ -114,6 +117,11 @@ signals:
     void contextMenuAboutToShow(QMenu* pMenu);
     /** @brief 将容器确认后的拾取状态同步给公共 QAction。 */
     void rotationCenterPickingChanged(bool bPicking);
+    /**
+     * @brief QVTK 视口尺寸变化时同步发出实际 Qt 像素尺寸。
+     * @note 信号在 QVTKWidget 处理 Resize 之前发出，接收方不得主动 Render。
+     */
+    void viewportSizeChanged(int nWidth, int nHeight);
 
 public slots:
     /** @brief 按固定倍率 1.2 放大，成功后统一渲染一次。 */
diff --git a/Include/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.h b/Include/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.h
index 9af9d8ac..8fe9402a 100644
--- a/Include/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.h
+++ b/Include/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.h
@@ -8,8 +8,8 @@
 /**
  * @brief 将结果属性目录中的稳定源文字转换为当前语言下的界面文字。
  *
- * 属性 ID、英文源文字和单位仍由 nmPebiResultPropertyCatalog 唯一维护；
- * 本类只负责固定翻译上下文，避免各业务控件重复硬编码属性名称。
+ * 属性 ID、英文源文字和单位仍由 nmPebiResultPropertyCatalog 维护；
+ * 本类统一提供 Qt 翻译文字及 VTK 可稳定绘制的固定 ASCII 短标题。
  */
 class NM_SUB_WXS_EXPORT nmPebiResultPropertyDisplayText
 {
@@ -20,6 +20,11 @@ public:
      * @return 翻译后的名称；未知属性返回空字符串。
      */
     static QString getDisplayName(const QString& sPropertyId);
+    /**
+     * @brief 返回 VTK 色标使用的固定 ASCII 短标题。
+     * @note 标题不参与翻译；未知属性返回空字符串。
+     */
+    static QString getScalarBarTitle(const QString& sPropertyId);
     /**
      * @brief 返回 Catalog 中的默认显示单位。
      * @return 单位原文；未知属性或无量纲属性返回空字符串。
diff --git a/Include/nmNum/nmSubWxs/nmPebiResultSceneController.h b/Include/nmNum/nmSubWxs/nmPebiResultSceneController.h
index 44514aa0..a85c8464 100644
--- a/Include/nmNum/nmSubWxs/nmPebiResultSceneController.h
+++ b/Include/nmNum/nmSubWxs/nmPebiResultSceneController.h
@@ -43,6 +43,12 @@ public:
     /** @brief 解除管线和快照引用并隐藏结果图层，不销毁 Scene。 */
     void clear();
 
+    /**
+     * @brief 缓存 QVTK 视口尺寸并更新色标二维布局，不主动 Render。
+     * @note 尺寸在无快照时仍会保存，后续创建色标图层时立即应用。
+     */
+    void setViewportSize(int nWidth, int nHeight);
+
     /**
      * @brief 原子切换同一快照内的属性和帧，成功时仅渲染一次。
      * @note 静态属性只接受帧 0；失败时恢复 Adapter、Mapper 和范围。
diff --git a/Include/nmNum/nmSubWxs/nmWxPebiResultViewWidget.h b/Include/nmNum/nmSubWxs/nmWxPebiResultViewWidget.h
index 7a13f51a..0038bbc4 100644
--- a/Include/nmNum/nmSubWxs/nmWxPebiResultViewWidget.h
+++ b/Include/nmNum/nmSubWxs/nmWxPebiResultViewWidget.h
@@ -62,6 +62,8 @@ private slots:
     void onControlOperationFailed(const QString& sError);
     /** @brief 明确操作成功后清除旧普通错误，不影响绑定失败或过期状态。 */
     void onControlOperationSucceeded();
+    /** @brief 将 QVTK 视口尺寸同步给结果场景，不主动触发额外渲染。 */
+    void onViewportSizeChanged(int nWidth, int nHeight);
 
     /** @brief 切换色标显隐。 */
     void onScalarBarToggled(bool bVisible);
diff --git a/Src/nmNum/nmRender/nmVTKColorMapCatalog.cpp b/Src/nmNum/nmRender/nmVTKColorMapCatalog.cpp
index 25f8c311..f2459b26 100644
--- a/Src/nmNum/nmRender/nmVTKColorMapCatalog.cpp
+++ b/Src/nmNum/nmRender/nmVTKColorMapCatalog.cpp
@@ -14,6 +14,33 @@ const char* const COLOR_MAP_GAS_SATURATION = "gas-saturation";
 const char* const COLOR_MAP_WATER_SATURATION = "water-saturation";
 const int COLOR_TABLE_SIZE = 256;
 
+struct RainbowControlPoint
+{
+    double m_dPosition;
+    int m_nRed;
+    int m_nGreen;
+    int m_nBlue;
+};
+
+// 固定控制点来自最新 Saphir 截图取样，位置之间统一执行线性 RGB 插值。
+const RainbowControlPoint RAINBOW_CONTROL_POINTS[] =
+{
+    { 0.00,   0,   0, 202 },
+    { 0.10,   0, 109, 226 },
+    { 0.20,   0, 223, 252 },
+    { 0.30,   0, 247, 133 },
+    { 0.40,   0, 254,  13 },
+    { 0.50, 104, 255,   0 },
+    { 0.60, 243, 255,   0 },
+    { 0.70, 255, 203,   0 },
+    { 0.80, 255, 136,   0 },
+    { 0.90, 235,  73,   0 },
+    { 1.00, 215,  12,   0 }
+};
+const int RAINBOW_CONTROL_POINT_COUNT =
+        static_cast<int>(sizeof(RAINBOW_CONTROL_POINTS) /
+                         sizeof(RAINBOW_CONTROL_POINTS[0]));
+
 QString stableId(const char* pId)
 {
     return QString::fromLatin1(pId);
@@ -33,6 +60,40 @@ QColor interpolateRgb(const QColor& oStart,
                   255);
 }
 
+QColor getRainbowColor(double dPosition)
+{
+    if(dPosition <= RAINBOW_CONTROL_POINTS[0].m_dPosition) {
+        const RainbowControlPoint& oPoint = RAINBOW_CONTROL_POINTS[0];
+        return QColor(oPoint.m_nRed, oPoint.m_nGreen, oPoint.m_nBlue, 255);
+    }
+
+    for(int nIndex = 1;
+        nIndex < RAINBOW_CONTROL_POINT_COUNT;
+        ++nIndex) {
+        const RainbowControlPoint& oEnd =
+                RAINBOW_CONTROL_POINTS[nIndex];
+        if(dPosition <= oEnd.m_dPosition) {
+            const RainbowControlPoint& oStart =
+                    RAINBOW_CONTROL_POINTS[nIndex - 1];
+            const double dLocalPosition =
+                    (dPosition - oStart.m_dPosition) /
+                    (oEnd.m_dPosition - oStart.m_dPosition);
+            return interpolateRgb(
+                        QColor(oStart.m_nRed,
+                               oStart.m_nGreen,
+                               oStart.m_nBlue),
+                        QColor(oEnd.m_nRed,
+                               oEnd.m_nGreen,
+                               oEnd.m_nBlue),
+                        dLocalPosition);
+        }
+    }
+
+    const RainbowControlPoint& oLast =
+            RAINBOW_CONTROL_POINTS[RAINBOW_CONTROL_POINT_COUNT - 1];
+    return QColor(oLast.m_nRed, oLast.m_nGreen, oLast.m_nBlue, 255);
+}
+
 }
 
 QStringList nmVTKColorMapCatalog::getColorMapIds()
@@ -61,10 +122,7 @@ bool nmVTKColorMapCatalog::getColor(const QString& sColorMapId,
 
     QColor oCandidate;
     if(sColorMapId == stableId(COLOR_MAP_RAINBOW)) {
-        // Saphir 风格 Rainbow：色相从蓝色 240 度连续过渡到红色 0 度。
-        oCandidate = QColor::fromHsvF(
-                    (1.0 - dPosition) * (240.0 / 360.0),
-                    1.0, 1.0, 1.0);
+        oCandidate = getRainbowColor(dPosition);
     } else if(sColorMapId == stableId(COLOR_MAP_OIL_SATURATION)) {
         oCandidate = interpolateRgb(
                     QColor(255, 255, 255), QColor(0, 255, 0), dPosition);
diff --git a/Src/nmNum/nmRender/nmVTKScalarBarLayer.cpp b/Src/nmNum/nmRender/nmVTKScalarBarLayer.cpp
index 33ad8f6a..d54d4af5 100644
--- a/Src/nmNum/nmRender/nmVTKScalarBarLayer.cpp
+++ b/Src/nmNum/nmRender/nmVTKScalarBarLayer.cpp
@@ -3,6 +3,7 @@
 #include <QByteArray>
 #include <QCoreApplication>
 #include <QThread>
+#include <QtGlobal>
 
 #include <vtkActor2D.h>
 #include <vtkCellArray.h>
@@ -20,6 +21,30 @@
 
 namespace {
 
+const int SCALAR_BAR_LEFT_MARGIN_PIXELS = 20;
+const int SCALAR_BAR_TOTAL_WIDTH_PIXELS = 108;
+// VTK 内部留白会压缩色带，目标宽度设为 34px 后可见宽度约为 30px。
+const int SCALAR_BAR_COLOR_WIDTH_PIXELS = 34;
+const int SCALAR_BAR_VISIBLE_COLOR_WIDTH_PIXELS = 30;
+const int SCALAR_BAR_TITLE_FONT_SIZE = 18;
+const int SCALAR_BAR_TITLE_SAFE_HEIGHT_PIXELS = 24;
+const int SCALAR_BAR_LABEL_FONT_SIZE = 15;
+const int SCALAR_BAR_SMALL_VIEWPORT_HEIGHT = 450;
+const int SCALAR_BAR_MEDIUM_VIEWPORT_HEIGHT = 650;
+const int SCALAR_BAR_LABEL_SPACING_PIXELS = 80;
+const int SCALAR_BAR_MIN_LABEL_COUNT = 6;
+const int SCALAR_BAR_MAX_LABEL_COUNT = 9;
+const int SCALAR_BAR_TITLE_OFFSET_Y_PIXELS = 28;
+const int SCALAR_BAR_SWATCH_WIDTH_PIXELS = 16;
+const int SCALAR_BAR_SWATCH_HEIGHT_PIXELS = 12;
+const int SCALAR_BAR_SWATCH_GAP_PIXELS = 4;
+const int SCALAR_BAR_TEXT_GAP_PIXELS = 6;
+const int SCALAR_BAR_LABEL_GAP_PIXELS = 8;
+const double SCALAR_BAR_NORMAL_BOTTOM_RATIO = 0.22;
+const double SCALAR_BAR_NORMAL_HEIGHT_RATIO = 0.67;
+const double SCALAR_BAR_SMALL_BOTTOM_RATIO = 0.22;
+const double SCALAR_BAR_SMALL_HEIGHT_RATIO = 0.62;
+
 // ScalarBarActor 和 LookupTable 均只能在 Qt GUI 线程中修改。
 bool isScalarBarGuiThread()
 {
@@ -62,18 +87,49 @@ vtkSmartPointer<vtkActor2D> createRangeSwatchActor(vtkPoints* pPoints)
     return pActor;
 }
 
-// 统一独立文本样式，使常量值和越界说明与普通色标刻度保持一致。
-void configureOverlayTextActor(vtkTextActor* pActor)
+// 独立文本共用字号和颜色；常量值可选择与普通刻度一致的强调样式。
+void configureOverlayTextActor(vtkTextActor* pActor,
+                               bool bUseTickStyle)
+{
+    pActor->SetInput("");
+    pActor->SetTextScaleModeToNone();
+    pActor->GetTextProperty()->SetFontFamilyToArial();
+    pActor->GetTextProperty()->SetFontSize(SCALAR_BAR_LABEL_FONT_SIZE);
+    pActor->GetTextProperty()->SetColor(1.0, 1.0, 1.0);
+    if(bUseTickStyle) {
+        pActor->GetTextProperty()->BoldOn();
+        pActor->GetTextProperty()->ItalicOn();
+        pActor->GetTextProperty()->ShadowOn();
+        pActor->GetTextProperty()->SetShadowOffset(1, -1);
+    } else {
+        pActor->GetTextProperty()->BoldOff();
+        pActor->GetTextProperty()->ItalicOff();
+        pActor->GetTextProperty()->ShadowOff();
+    }
+    pActor->GetTextProperty()->SetJustificationToLeft();
+    pActor->GetTextProperty()->SetVerticalJustificationToCentered();
+    pActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
+    pActor->GetProperty()->SetDisplayLocationToForeground();
+    pActor->PickableOff();
+    pActor->SetVisibility(0);
+}
+
+// 独立标题不受 vtkScalarBarActor 内部居中布局影响，始终保持左对齐。
+void configureTitleActor(vtkTextActor* pActor)
 {
     pActor->SetInput("");
     pActor->SetTextScaleModeToNone();
-    pActor->GetTextProperty()->SetFontSize(11);
+    pActor->GetTextProperty()->SetFontFamilyToArial();
+    pActor->GetTextProperty()->SetFontSize(SCALAR_BAR_TITLE_FONT_SIZE);
+    pActor->GetTextProperty()->SetColor(1.0, 1.0, 1.0);
     pActor->GetTextProperty()->BoldOff();
     pActor->GetTextProperty()->ItalicOff();
-    pActor->GetTextProperty()->ShadowOff();
+    pActor->GetTextProperty()->ShadowOn();
+    pActor->GetTextProperty()->SetShadowOffset(1, -1);
     pActor->GetTextProperty()->SetJustificationToLeft();
-    pActor->GetTextProperty()->SetVerticalJustificationToCentered();
+    pActor->GetTextProperty()->SetVerticalJustificationToBottom();
     pActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
+    pActor->GetProperty()->SetDisplayLocationToForeground();
     pActor->PickableOff();
     pActor->SetVisibility(0);
 }
@@ -97,6 +153,7 @@ nmVTKScalarBarLayer::nmVTKScalarBarLayer(const QString& sLayerId)
       m_pLookupTable(nullptr),
       m_pRootAssembly(vtkSmartPointer<vtkPropAssembly>::New()),
       m_pActor(vtkSmartPointer<vtkScalarBarActor>::New()),
+      m_pTitleActor(vtkSmartPointer<vtkTextActor>::New()),
       m_pConstantValueActor(vtkSmartPointer<vtkTextActor>::New()),
       m_pBelowRangeSwatchPoints(vtkSmartPointer<vtkPoints>::New()),
       m_pBelowRangeSwatchActor(nullptr),
@@ -108,21 +165,33 @@ nmVTKScalarBarLayer::nmVTKScalarBarLayer(const QString& sLayerId)
       m_dPositionX(0.0),
       m_dPositionY(0.0),
       m_dWidth(0.1),
-      m_dHeight(0.8)
+      m_dHeight(0.8),
+      m_nViewportWidth(0),
+      m_nViewportHeight(0)
 {
     Q_ASSERT(isScalarBarGuiThread());
     // vtkScalarBarActor 是二维 Prop，仍通过图层基类统一完成挂载和显隐。
     m_pActor->SetNumberOfLabels(5);
     m_pActor->SetLabelFormat("%.6g");
+    m_pActor->SetTitle("");
+    m_pActor->SetOrientationToVertical();
+    m_pActor->SetTextPositionToSucceedScalarBar();
+    m_pActor->SetTextPad(3);
     m_pActor->UnconstrainedFontSizeOn();
-    m_pActor->GetLabelTextProperty()->SetFontSize(11);
-    m_pActor->GetLabelTextProperty()->BoldOff();
-    m_pActor->GetLabelTextProperty()->ItalicOff();
-    m_pActor->GetLabelTextProperty()->ShadowOff();
-    m_pActor->GetTitleTextProperty()->SetFontSize(12);
-    m_pActor->GetTitleTextProperty()->BoldOff();
-    m_pActor->GetTitleTextProperty()->ItalicOff();
-    m_pActor->GetTitleTextProperty()->ShadowOff();
+    m_pActor->GetLabelTextProperty()->SetFontFamilyToArial();
+    m_pActor->GetLabelTextProperty()->SetFontSize(
+                SCALAR_BAR_LABEL_FONT_SIZE);
+    m_pActor->GetLabelTextProperty()->SetColor(1.0, 1.0, 1.0);
+    m_pActor->GetLabelTextProperty()->BoldOn();
+    m_pActor->GetLabelTextProperty()->ItalicOn();
+    m_pActor->GetLabelTextProperty()->ShadowOn();
+    m_pActor->GetLabelTextProperty()->SetShadowOffset(1, -1);
+    m_pActor->SetMaximumWidthInPixels(SCALAR_BAR_TOTAL_WIDTH_PIXELS);
+    m_pActor->SetBarRatio(
+                static_cast<double>(SCALAR_BAR_COLOR_WIDTH_PIXELS) /
+                static_cast<double>(SCALAR_BAR_TOTAL_WIDTH_PIXELS));
+    m_pActor->GetProperty()->SetDisplayLocationToForeground();
+    m_pActor->PickableOff();
     m_pActor->DrawAnnotationsOff();
     m_pActor->DrawBelowRangeSwatchOff();
     m_pActor->DrawAboveRangeSwatchOff();
@@ -134,13 +203,15 @@ nmVTKScalarBarLayer::nmVTKScalarBarLayer(const QString& sLayerId)
             createRangeSwatchActor(m_pBelowRangeSwatchPoints);
     m_pAboveRangeSwatchActor =
             createRangeSwatchActor(m_pAboveRangeSwatchPoints);
-    configureOverlayTextActor(m_pConstantValueActor);
-    configureOverlayTextActor(m_pBelowRangeTextActor);
-    configureOverlayTextActor(m_pAboveRangeTextActor);
+    configureTitleActor(m_pTitleActor);
+    configureOverlayTextActor(m_pConstantValueActor, true);
+    configureOverlayTextActor(m_pBelowRangeTextActor, false);
+    configureOverlayTextActor(m_pAboveRangeTextActor, false);
     updateOverlayLayout();
 
     // 根 Assembly 只在构造时注册，运行期仅更新子 Actor 状态。
     m_pRootAssembly->AddPart(m_pActor);
+    m_pRootAssembly->AddPart(m_pTitleActor);
     m_pRootAssembly->AddPart(m_pConstantValueActor);
     m_pRootAssembly->AddPart(m_pBelowRangeSwatchActor);
     m_pRootAssembly->AddPart(m_pBelowRangeTextActor);
@@ -162,6 +233,7 @@ nmVTKScalarBarLayer::~nmVTKScalarBarLayer()
     m_pBelowRangeSwatchActor = nullptr;
     m_pBelowRangeSwatchPoints = nullptr;
     m_pConstantValueActor = nullptr;
+    m_pTitleActor = nullptr;
     m_pActor = nullptr;
     m_pRootAssembly = nullptr;
 }
@@ -190,9 +262,11 @@ void nmVTKScalarBarLayer::setTitle(const QString& sTitle)
         return;
     }
     m_sTitle = sTitle;
-    // VTK 7.1 接口接收窄字符串，统一以 UTF-8 临时缓冲传入并由 Actor 复制。
+    // 内置标题永久留空，避免其按整个 ScalarBarActor 宽度自动居中。
+    m_pActor->SetTitle("");
     const QByteArray aTitle = sTitle.toUtf8();
-    m_pActor->SetTitle(aTitle.constData());
+    m_pTitleActor->SetInput(aTitle.constData());
+    m_pTitleActor->SetVisibility(sTitle.isEmpty() ? 0 : 1);
 }
 
 QString nmVTKScalarBarLayer::getTitle() const
@@ -232,6 +306,73 @@ int nmVTKScalarBarLayer::getNumberOfLabels() const
     return m_pActor != nullptr ? m_pActor->GetNumberOfLabels() : 0;
 }
 
+bool nmVTKScalarBarLayer::setViewportSize(int nWidth, int nHeight)
+{
+    Q_ASSERT(isScalarBarGuiThread());
+    if(!isScalarBarGuiThread() || nWidth <= 0 || nHeight <= 0) {
+        return false;
+    }
+
+    m_nViewportWidth = nWidth;
+    m_nViewportHeight = nHeight;
+    const bool bSmallViewport =
+            nHeight < SCALAR_BAR_SMALL_VIEWPORT_HEIGHT;
+    const double dBottomRatio = bSmallViewport
+            ? SCALAR_BAR_SMALL_BOTTOM_RATIO
+            : SCALAR_BAR_NORMAL_BOTTOM_RATIO;
+    const double dHeightRatio = bSmallViewport
+            ? SCALAR_BAR_SMALL_HEIGHT_RATIO
+            : SCALAR_BAR_NORMAL_HEIGHT_RATIO;
+
+    // 小于目标宽度的极端视口会安全收窄；正常窗口保持固定像素宽度。
+    const int nLeftMargin = qMin(
+                SCALAR_BAR_LEFT_MARGIN_PIXELS, qMax(0, nWidth - 1));
+    const int nLayoutWidth = qMin(
+                SCALAR_BAR_TOTAL_WIDTH_PIXELS,
+                qMax(1, nWidth - nLeftMargin));
+    const int nLayoutHeight = qMax(1, qRound(nHeight * dHeightRatio));
+    m_dPositionX = static_cast<double>(nLeftMargin) / nWidth;
+    m_dPositionY = dBottomRatio;
+    m_dWidth = static_cast<double>(nLayoutWidth) / nWidth;
+    m_dHeight = static_cast<double>(nLayoutHeight) / nHeight;
+
+    m_pActor->SetPosition(m_dPositionX, m_dPositionY);
+    m_pActor->SetWidth(m_dWidth);
+    m_pActor->SetHeight(m_dHeight);
+    m_pActor->SetMaximumWidthInPixels(nLayoutWidth);
+    m_pActor->SetMaximumHeightInPixels(nLayoutHeight);
+    double dBarRatio =
+            static_cast<double>(SCALAR_BAR_COLOR_WIDTH_PIXELS) /
+            static_cast<double>(nLayoutWidth);
+    if(dBarRatio >= 1.0) {
+        dBarRatio = 0.95;
+    }
+    m_pActor->SetBarRatio(dBarRatio);
+    updateOverlayLayout();
+    return true;
+}
+
+int nmVTKScalarBarLayer::getResponsiveLabelCount() const
+{
+    if(m_nViewportHeight <= 0) {
+        return 5;
+    }
+    if(m_nViewportHeight < SCALAR_BAR_SMALL_VIEWPORT_HEIGHT) {
+        return 4;
+    }
+    if(m_nViewportHeight <= SCALAR_BAR_MEDIUM_VIEWPORT_HEIGHT) {
+        return 6;
+    }
+
+    const int nBarHeight = qMax(
+                1, qRound(m_dHeight * m_nViewportHeight));
+    return qBound(
+                SCALAR_BAR_MIN_LABEL_COUNT,
+                qRound(static_cast<double>(nBarHeight) /
+                       SCALAR_BAR_LABEL_SPACING_PIXELS),
+                SCALAR_BAR_MAX_LABEL_COUNT);
+}
+
 void nmVTKScalarBarLayer::setBelowRangeSwatch(
         bool bVisible,
         const QString& sText)
@@ -313,22 +454,50 @@ bool nmVTKScalarBarLayer::setSize(double dWidth, double dHeight)
 
 void nmVTKScalarBarLayer::updateOverlayLayout()
 {
-    // 常量值放在色带右侧的垂直中心，视觉位置与普通刻度标签一致。
-    const double dLabelX = m_dPositionX + m_dWidth + 0.01;
+    const bool bHasViewport =
+            m_nViewportWidth > 0 && m_nViewportHeight > 0;
+    const double dPixelX = bHasViewport
+            ? 1.0 / m_nViewportWidth : 0.01;
+    const double dPixelY = bHasViewport
+            ? 1.0 / m_nViewportHeight : 0.01;
+    double dColorWidth = bHasViewport
+            ? SCALAR_BAR_VISIBLE_COLOR_WIDTH_PIXELS * dPixelX
+            : m_dWidth * 0.33;
+    if(dColorWidth > m_dWidth) {
+        dColorWidth = m_dWidth;
+    }
+
+    // 常量值与普通刻度共用色带右侧的固定像素起点。
+    const double dLabelX = m_dPositionX + dColorWidth +
+            SCALAR_BAR_LABEL_GAP_PIXELS * dPixelX;
     const double dLabelY = m_dPositionY + m_dHeight * 0.5;
     m_pConstantValueActor->GetPositionCoordinate()->SetValue(
                 dLabelX, dLabelY, 0.0);
 
-    // 越界色块位于色带上下两端外侧，避免覆盖连续色带和普通刻度。
-    double dSwatchWidth = m_dWidth * 0.25;
-    if(dSwatchWidth < 0.012) {
-        dSwatchWidth = 0.012;
-    } else if(dSwatchWidth > 0.025) {
-        dSwatchWidth = 0.025;
-    }
-    const double dSwatchHeight = 0.018;
-    const double dSwatchGap = 0.012;
-    const double dTextGap = 0.008;
+    // 标题通常位于色带左上方；极小视口下向下钳制，避免越过视口顶边。
+    const double dDesiredTitleY =
+            m_dPositionY + m_dHeight +
+            SCALAR_BAR_TITLE_OFFSET_Y_PIXELS * dPixelY;
+    const double dMaximumTitleY = bHasViewport
+            ? qMax(0.0, 1.0 -
+                   SCALAR_BAR_TITLE_SAFE_HEIGHT_PIXELS * dPixelY)
+            : dDesiredTitleY;
+    const double dTitleY = qMin(dDesiredTitleY, dMaximumTitleY);
+    m_pTitleActor->GetPositionCoordinate()->SetValue(
+                m_dPositionX,
+                dTitleY,
+                0.0);
+
+    // 越界色块和文字也按实际像素布局，窗口缩放时不会横向漂移。
+    const double dSwatchWidth = bHasViewport
+            ? SCALAR_BAR_SWATCH_WIDTH_PIXELS * dPixelX
+            : qMin(m_dWidth * 0.25, 0.025);
+    const double dSwatchHeight = bHasViewport
+            ? SCALAR_BAR_SWATCH_HEIGHT_PIXELS * dPixelY : 0.018;
+    const double dSwatchGap = bHasViewport
+            ? SCALAR_BAR_SWATCH_GAP_PIXELS * dPixelY : 0.012;
+    const double dTextGap = bHasViewport
+            ? SCALAR_BAR_TEXT_GAP_PIXELS * dPixelX : 0.008;
     const double dBelowY =
             m_dPositionY - dSwatchGap - dSwatchHeight;
     const double dAboveY =
diff --git a/Src/nmNum/nmRender/nmWxVTKRenderContainerWidget.cpp b/Src/nmNum/nmRender/nmWxVTKRenderContainerWidget.cpp
index c00c673b..16172d15 100644
--- a/Src/nmNum/nmRender/nmWxVTKRenderContainerWidget.cpp
+++ b/Src/nmNum/nmRender/nmWxVTKRenderContainerWidget.cpp
@@ -16,6 +16,7 @@
 #include <QMenu>
 #include <QMessageBox>
 #include <QMouseEvent>
+#include <QResizeEvent>
 #include <QStackedWidget>
 #include <QThread>
 #include <QTimer>
@@ -240,6 +241,11 @@ QVTKWidget* nmWxVTKRenderContainerWidget::getVtkWidget() const
     return m_pVtkWidget;
 }
 
+QSize nmWxVTKRenderContainerWidget::getViewportSize() const
+{
+    return m_pVtkWidget != nullptr ? m_pVtkWidget->size() : QSize();
+}
+
 vtkRenderer* nmWxVTKRenderContainerWidget::getRenderer() const
 {
     return m_pRenderer;
@@ -715,6 +721,17 @@ bool nmWxVTKRenderContainerWidget::eventFilter(
         return QWidget::eventFilter(pObject, pEvent);
     }
 
+    if(pEvent->type() == QEvent::Resize) {
+        const QResizeEvent* pResizeEvent =
+                static_cast<const QResizeEvent*>(pEvent);
+        const QSize oViewportSize = pResizeEvent->size();
+        if(oViewportSize.width() > 0 && oViewportSize.height() > 0) {
+            // 只同步布局输入；QVTKWidget 随后处理 Resize 并完成本次绘制。
+            emit viewportSizeChanged(
+                        oViewportSize.width(), oViewportSize.height());
+        }
+    }
+
     // 一次性拾取优先于 VTK 相机交互和右键菜单，并继续吞掉对应 Release。
     if(m_pRotationCenterPicker != nullptr &&
        (m_pRotationCenterPicker->isActive() ||
diff --git a/Src/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.cpp b/Src/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.cpp
index 424f4af8..89382d3f 100644
--- a/Src/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.cpp
+++ b/Src/nmNum/nmSubWxs/nmPebiResultPropertyDisplayText.cpp
@@ -34,6 +34,40 @@ QString nmPebiResultPropertyDisplayText::getDisplayName(
                 "nmPebiResultProperty", baSourceText.constData());
 }
 
+QString nmPebiResultPropertyDisplayText::getScalarBarTitle(
+        const QString& sPropertyId)
+{
+    nmPebiResultPropertyDescriptor oDescriptor;
+    if(!nmPebiResultPropertyCatalog::findDescriptor(
+           sPropertyId, oDescriptor)) {
+        return QString();
+    }
+
+    // VTK 标题只映射稳定的 ASCII 属性符号，单位始终由 Catalog 唯一提供。
+    QString sTitle;
+    if(sPropertyId == QString::fromLatin1("pressure")) {
+        sTitle = QString::fromLatin1("p");
+    }
+    if(sPropertyId == QString::fromLatin1("permeability")) {
+        sTitle = QString::fromLatin1("k");
+    }
+    if(sPropertyId == QString::fromLatin1("porosity")) {
+        sTitle = QString::fromLatin1("phi");
+    }
+    if(sPropertyId == QString::fromLatin1("thickness")) {
+        sTitle = QString::fromLatin1("h");
+    }
+    if(sTitle.isEmpty()) {
+        return QString();
+    }
+
+    if(!oDescriptor.m_sDefaultDisplayUnit.isEmpty()) {
+        sTitle += QString::fromLatin1(" ") +
+                oDescriptor.m_sDefaultDisplayUnit;
+    }
+    return sTitle;
+}
+
 QString nmPebiResultPropertyDisplayText::getDefaultDisplayUnit(
         const QString& sPropertyId)
 {
diff --git a/Src/nmNum/nmSubWxs/nmPebiResultSceneController.cpp b/Src/nmNum/nmSubWxs/nmPebiResultSceneController.cpp
index 7086e017..15f79e83 100644
--- a/Src/nmNum/nmSubWxs/nmPebiResultSceneController.cpp
+++ b/Src/nmNum/nmSubWxs/nmPebiResultSceneController.cpp
@@ -298,14 +298,8 @@ bool prepareDisplayCandidate(
     const bool bConstantValueLabel =
             !oSettings.m_bHasManualRange &&
             dBusinessRange[0] == dBusinessRange[1];
-    QString sTitle =
-            nmPebiResultPropertyDisplayText::getDisplayName(sPropertyId);
-    const QString sUnit =
-            nmPebiResultPropertyDisplayText::getDefaultDisplayUnit(sPropertyId);
-    if(!sUnit.isEmpty()) {
-        sTitle += QString::fromLatin1(" (") + sUnit +
-                QString::fromLatin1(")");
-    }
+    const QString sTitle =
+            nmPebiResultPropertyDisplayText::getScalarBarTitle(sPropertyId);
 
     oCandidate.m_oSettings = oSettings;
     oCandidate.m_dBusinessRange[0] = dBusinessRange[0];
@@ -399,8 +393,11 @@ public:
           m_pAdapter(nullptr),
           m_nCurrentFrameIndex(-1),
           m_nSnapshotBindingRevision(0),
+          m_nViewportWidth(0),
+          m_nViewportHeight(0),
           m_bHasPropertyRange(false),
           m_bHasBounds(false),
+          m_bCurrentConstantValueLabel(false),
           m_bScalarBarVisible(true),
           m_bScaleGridVisible(false),
           m_bWellNamesVisible(true)
@@ -552,8 +549,14 @@ public:
             nmVTKScalarBarLayer* pLayer = new nmVTKScalarBarLayer(
                         QString::fromLatin1(RESULT_SCALAR_BAR_LAYER_ID));
             pLayer->setVisible(false);
-            pLayer->setPosition(0.05, 0.1);
-            pLayer->setSize(0.1, 0.8);
+            if(m_nViewportWidth > 0 && m_nViewportHeight > 0 &&
+               !pLayer->setViewportSize(
+                   m_nViewportWidth, m_nViewportHeight)) {
+                delete pLayer;
+                rollbackCreatedLayers(
+                            bCreatedMesh, false, false, false);
+                return false;
+            }
             if(!pScene->addLayer(pLayer)) {
                 delete pLayer;
                 rollbackCreatedLayers(
@@ -677,6 +680,20 @@ public:
                     pLookupTable);
     }
 
+    void applyScalarBarLayout()
+    {
+        if(m_pScalarBarLayer == nullptr) {
+            return;
+        }
+        if(m_nViewportWidth > 0 && m_nViewportHeight > 0) {
+            m_pScalarBarLayer->setViewportSize(
+                        m_nViewportWidth, m_nViewportHeight);
+        }
+        const int nLabelCount = m_bCurrentConstantValueLabel
+                ? 0 : m_pScalarBarLayer->getResponsiveLabelCount();
+        m_pScalarBarLayer->setNumberOfLabels(nLabelCount);
+    }
+
     void applyScalarBarState(const ResultDisplayCandidate& oDisplay)
     {
         if(m_pScalarBarLayer == nullptr) {
@@ -684,9 +701,8 @@ public:
         }
         m_pScalarBarLayer->setLookupTable(oDisplay.m_pLookupTable);
         m_pScalarBarLayer->setTitle(oDisplay.m_sScalarBarTitle);
-        m_pScalarBarLayer->setLabelFormat(QString::fromLatin1("%.6g"));
-        m_pScalarBarLayer->setNumberOfLabels(
-                    oDisplay.m_bConstantValueLabel ? 0 : 5);
+        m_pScalarBarLayer->setLabelFormat(QString::fromLatin1("%.4g"));
+        m_bCurrentConstantValueLabel = oDisplay.m_bConstantValueLabel;
         m_pScalarBarLayer->setConstantValueLabel(
                     oDisplay.m_bConstantValueLabel,
                     oDisplay.m_bConstantValueLabel
@@ -698,6 +714,7 @@ public:
         m_pScalarBarLayer->setAboveRangeSwatch(
                     oDisplay.m_oSettings.m_bUseAboveRangeColor,
                     controllerText("Above max"));
+        applyScalarBarLayout();
     }
 
     void applyLayerVisibility(bool bHasData)
@@ -743,10 +760,11 @@ public:
             if(m_pScalarBarLayer != nullptr) {
                 m_pScalarBarLayer->setLookupTable(nullptr);
                 m_pScalarBarLayer->setTitle(QString());
-                m_pScalarBarLayer->setNumberOfLabels(5);
                 m_pScalarBarLayer->setBelowRangeSwatch(false, QString());
                 m_pScalarBarLayer->setAboveRangeSwatch(false, QString());
                 m_pScalarBarLayer->setConstantValueLabel(false, QString());
+                m_bCurrentConstantValueLabel = false;
+                applyScalarBarLayout();
             }
             applyLayerVisibility(false);
             return true;
@@ -787,11 +805,12 @@ public:
             m_pScalarBarLayer->setVisible(false);
             m_pScalarBarLayer->setLookupTable(nullptr);
             m_pScalarBarLayer->setTitle(QString());
-            m_pScalarBarLayer->setNumberOfLabels(5);
             m_pScalarBarLayer->setBelowRangeSwatch(false, QString());
             m_pScalarBarLayer->setAboveRangeSwatch(false, QString());
             m_pScalarBarLayer->setConstantValueLabel(false, QString());
         }
+        m_bCurrentConstantValueLabel = false;
+        applyScalarBarLayout();
         if(m_pScaleGridLayer != nullptr) {
             m_pScaleGridLayer->setVisible(false);
         }
@@ -873,11 +892,14 @@ public:
     int m_nCurrentFrameIndex;
     /** @brief 不同快照对象完整提交成功后的单调序号，clear 和失败均不回退。 */
     quint64 m_nSnapshotBindingRevision;
+    int m_nViewportWidth; ///< 最近一次有效 QVTK 视口像素宽度。
+    int m_nViewportHeight; ///< 最近一次有效 QVTK 视口像素高度。
     double m_dBusinessRange[2];
     double m_dDisplayRange[2];
     double m_dBounds[6];
     bool m_bHasPropertyRange;
     bool m_bHasBounds;
+    bool m_bCurrentConstantValueLabel; ///< 当前色标是否只显示唯一业务值。
     bool m_bScalarBarVisible;
     bool m_bScaleGridVisible;
     bool m_bWellNamesVisible;
@@ -1132,6 +1154,27 @@ void nmPebiResultSceneController::clear()
     }
 }
 
+void nmPebiResultSceneController::setViewportSize(
+        int nWidth,
+        int nHeight)
+{
+    Q_ASSERT(isResultSceneGuiThread());
+    if(!isResultSceneGuiThread() || m_pPrivate == nullptr ||
+       nWidth <= 0 || nHeight <= 0) {
+        return;
+    }
+
+    m_pPrivate->discardActiveDataIfLayersLost();
+    if(m_pPrivate->m_nViewportWidth == nWidth &&
+       m_pPrivate->m_nViewportHeight == nHeight) {
+        return;
+    }
+    m_pPrivate->m_nViewportWidth = nWidth;
+    m_pPrivate->m_nViewportHeight = nHeight;
+    // QVTKWidget 的 Resize 会负责绘制，这里只同步二维布局和刻度数量。
+    m_pPrivate->applyScalarBarLayout();
+}
+
 bool nmPebiResultSceneController::applyPropertyFrame(
         const QString& sPropertyId,
         int nFrameIndex,
diff --git a/Src/nmNum/nmSubWxs/nmWxPebiResultViewWidget.cpp b/Src/nmNum/nmSubWxs/nmWxPebiResultViewWidget.cpp
index 2d783461..22f1b4f9 100644
--- a/Src/nmNum/nmSubWxs/nmWxPebiResultViewWidget.cpp
+++ b/Src/nmNum/nmSubWxs/nmWxPebiResultViewWidget.cpp
@@ -197,6 +197,16 @@ void nmWxPebiResultViewWidget::onControlOperationSucceeded()
     refreshStatusBar();
 }
 
+void nmWxPebiResultViewWidget::onViewportSizeChanged(
+        int nWidth,
+        int nHeight)
+{
+    if(m_pSceneController != nullptr) {
+        // SceneController 缓存尺寸，即使当前尚未创建结果色标也不会丢失。
+        m_pSceneController->setViewportSize(nWidth, nHeight);
+    }
+}
+
 void nmWxPebiResultViewWidget::onScalarBarToggled(bool bVisible)
 {
     if(m_pSceneController != nullptr && m_pSceneController->hasSnapshot()) {
@@ -245,6 +255,12 @@ void nmWxPebiResultViewWidget::createUi()
                 nmVTKViewCommandController::ViewCommand_Print |
                 nmVTKViewCommandController::ViewCommand_PrintPreview);
     m_pSceneController = new nmPebiResultSceneController(m_pRenderContainer);
+    connect(m_pRenderContainer, SIGNAL(viewportSizeChanged(int,int)),
+            this, SLOT(onViewportSizeChanged(int,int)));
+    const QSize oInitialViewportSize =
+            m_pRenderContainer->getViewportSize();
+    onViewportSizeChanged(
+                oInitialViewportSize.width(), oInitialViewportSize.height());
 
     m_pToolBar = new QToolBar(pRenderArea);
     m_pToolBar->setOrientation(Qt::Vertical);