diff --git a/src/app/main.cpp b/src/app/main.cpp
index feb0358..c414485 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -35,6 +35,7 @@
 #include <QComboBox>
 #include <QFrame>
 #include <QHBoxLayout>
+#include <QSplitter>
 #include <QPushButton>
 #include <QSlider>
 #include <QGraphicsOpacityEffect>
@@ -379,14 +380,22 @@ void buildWorkbench(QMainWindow& window, geopro::data::LocalSampleRepository& re
         }
         fieldDict->setArrayTypeEnum(std::move(e));
     });
-    auto* viewRow = new QHBoxLayout();
-    viewRow->setContentsMargins(0, 0, 0, 0);
-    viewRow->setSpacing(0);
-    viewRow->addWidget(drawer);          // 左侧抽屉(自带折叠按钮)
-    viewRow->addWidget(viewToolbar);     // 画布工具条(竖排:设置/前后上下左右/缩放复位)
-    viewRow->addWidget(vtkWidget, 1);    // 右侧 GL 画布
+    // 左侧抽屉 | 右侧(工具条+画布)用 QSplitter，左面板可拖动改宽（不可拖没；右侧伸缩）。
+    auto* split = new QSplitter(Qt::Horizontal);
+    split->setChildrenCollapsible(false);
+    split->setHandleWidth(4);
+    split->addWidget(drawer);
+    auto* rightWrap = new QWidget();
+    auto* rl = new QHBoxLayout(rightWrap);
+    rl->setContentsMargins(0, 0, 0, 0);
+    rl->setSpacing(0);
+    rl->addWidget(viewToolbar);     // 画布工具条
+    rl->addWidget(vtkWidget, 1);    // GL 画布
+    split->addWidget(rightWrap);
+    split->setStretchFactor(0, 0);
+    split->setStretchFactor(1, 1);
     centerLayout->addWidget(viewHeader);
-    centerLayout->addLayout(viewRow, 1);
+    centerLayout->addWidget(split, 1);
 
     // 3b：三维分析栏勾选的已保存切片(dd_slice) id 集合 + 调和函数。
     //   syncSlices：按"当前活动体 dsId"调和 InteractionManager 上显示的已保存切片——
diff --git a/src/app/panels/columns/CategoryAnalysisTab.cpp b/src/app/panels/columns/CategoryAnalysisTab.cpp
index f719751..f443a00 100644
--- a/src/app/panels/columns/CategoryAnalysisTab.cpp
+++ b/src/app/panels/columns/CategoryAnalysisTab.cpp
@@ -17,6 +17,7 @@ CategoryAnalysisTab::CategoryAnalysisTab(geopro::data::DatasetFieldDictionary* d
     auto* scroll = new QScrollArea(this);
     scroll->setWidgetResizable(true);
     scroll->setFrameShape(QFrame::NoFrame);
+    scroll->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);  // 内容随面板宽自适应，不出横向滚动条
     outer->addWidget(scroll, 1);
 
     auto* content = new QWidget(scroll);
diff --git a/src/app/panels/columns/ColumnDrawer.cpp b/src/app/panels/columns/ColumnDrawer.cpp
index 4e25e17..07b30df 100644
--- a/src/app/panels/columns/ColumnDrawer.cpp
+++ b/src/app/panels/columns/ColumnDrawer.cpp
@@ -51,8 +51,9 @@ ColumnDrawer::ColumnDrawer(QWidget* parent, geopro::data::DatasetFieldDictionary
     root->addWidget(body_, 1);
     root->addWidget(toggleBtn_, 0);
 
-    // 展开时限宽 ~318px (300 body + 18 btn)
-    setMaximumWidth(318);
+    // 可调宽：min 180 / max 560（外层 QSplitter 拖动改宽）。
+    setMinimumWidth(180);
+    setMaximumWidth(560);
 }
 
 void ColumnDrawer::toggleCollapsed()
@@ -61,8 +62,9 @@ void ColumnDrawer::toggleCollapsed()
     body_->setVisible(!collapsed_);
     toggleBtn_->setIcon(geopro::app::makeGlyph(collapsed_ ? Glyph::ChevronRight : Glyph::ChevronLeft,
                                                geopro::app::tokenColor("text/secondary"), 14));
-    // 折叠后只保留按钮宽度；展开恢复上限
-    setMaximumWidth(collapsed_ ? 18 : 318);
+    // 折叠后只保留按钮宽度；展开恢复可调范围
+    setMinimumWidth(collapsed_ ? 0 : 180);
+    setMaximumWidth(collapsed_ ? 18 : 560);
 }
 
 void ColumnDrawer::expand()