diff --git a/src/app/panels/columns/CategoryAnalysisTab.cpp b/src/app/panels/columns/CategoryAnalysisTab.cpp
index 4e7c0ee..d110e4b 100644
--- a/src/app/panels/columns/CategoryAnalysisTab.cpp
+++ b/src/app/panels/columns/CategoryAnalysisTab.cpp
@@ -22,7 +22,7 @@ CategoryAnalysisTab::CategoryAnalysisTab(geopro::data::DatasetFieldDictionary* d
 
     auto* content = new QWidget(scroll);
     auto* col = new QVBoxLayout(content);
-    col->setContentsMargins(0, 0, 0, 0);
+    col->setContentsMargins(0, space::kSm, 0, space::kSm);  // 顶部留白：首段段头不贴顶
     col->setSpacing(space::kSm);
 
     for (const CategorySpec& spec : categoryConfigs()) {
diff --git a/src/app/panels/columns/CategorySection.cpp b/src/app/panels/columns/CategorySection.cpp
index 732bee0..a7efac1 100644
--- a/src/app/panels/columns/CategorySection.cpp
+++ b/src/app/panels/columns/CategorySection.cpp
@@ -33,24 +33,50 @@ CategorySection::CategorySection(const CategorySpec& spec, geopro::data::Dataset
     root->setContentsMargins(0, 0, 0, 0);
     root->setSpacing(0);
 
-    // 数据类型标题行（spec §7）：折叠箭头+标题（左） | 「+新增三维体」（右，仅反演类，在标题行而非筛选行）。
+    // 数据类型段头（可折叠，规范§4.3/§6）：chevron + 标题(title 字号·半粗) ｜「+ 新增三维体」(右,仅反演类)。
+    //   段头加浅底 + 底分隔线作视觉分段；去原生小三角(难看)→chevron 文本前缀，随主题/hover 变色。
     auto* headerRow = new QWidget(this);
+    headerRow->setObjectName(QStringLiteral("secHeader"));
+    applyTokenizedStyleSheet(headerRow,
+                             QStringLiteral("QWidget#secHeader{background:{{bg/panel-subtle}};"
+                                            "border-bottom:1px solid {{divider}};}"));
     auto* hl = new QHBoxLayout(headerRow);
-    hl->setContentsMargins(space::kSm, 0, space::kSm, 0);
+    hl->setContentsMargins(space::kMd, space::kSm, space::kSm, space::kSm);
     hl->setSpacing(space::kSm);
     header_ = new QToolButton(headerRow);
-    header_->setText(QString::fromStdString(spec_.title));
     header_->setCheckable(true);
     header_->setChecked(true);
-    header_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
-    header_->setArrowType(Qt::DownArrow);
-    header_->setAutoRaise(true);
+    header_->setArrowType(Qt::NoArrow);
+    header_->setToolButtonStyle(Qt::ToolButtonTextOnly);
+    header_->setCursor(Qt::PointingHandCursor);
+    applyTokenizedStyleSheet(
+        header_, QStringLiteral("QToolButton{border:none;background:transparent;padding:0;"
+                                "font-size:%1px;font-weight:%2;color:{{text/primary}};}"
+                                "QToolButton:hover{color:{{accent/primary}};}")
+                     .arg(scaledPx(type::kTitle))
+                     .arg(type::kWeightSemibold));
+    auto syncHeader = [this] {
+        header_->setText((header_->isChecked() ? QStringLiteral("▾  ") : QStringLiteral("▸  "))
+                         + QString::fromStdString(spec_.title));
+    };
+    syncHeader();
     hl->addWidget(header_);
     hl->addStretch(1);
     if (spec_.canGenerateVolume) {
         auto* gen = new QToolButton(headerRow);
         gen->setText(QStringLiteral("+ 新增三维体"));
-        gen->setAutoRaise(true);
+        gen->setCursor(Qt::PointingHandCursor);
+        // 次级强调按钮(规范§6.7)：描边 accent + accent 文字，hover 浅强调底；非裸文字。
+        applyTokenizedStyleSheet(
+            gen, QStringLiteral(
+                     "QToolButton{border:1px solid {{accent/primary}};border-radius:%1px;"
+                     "color:{{accent/primary}};background:transparent;padding:%2px %3px;font-size:%4px;}"
+                     "QToolButton:hover{background:{{bg/selected}};}"
+                     "QToolButton:pressed{background:{{bg/hover}};}")
+                     .arg(radius::kSm)
+                     .arg(scaledPx(space::kXxs))
+                     .arg(scaledPx(space::kMd))
+                     .arg(scaledPx(type::kCaption)));
         connect(gen, &QToolButton::clicked, this, [this] {
             emit generateVolumeRequested(QString::fromStdString(spec_.dsTypeCode), checkedDsIds());
         });
@@ -65,6 +91,7 @@ CategorySection::CategorySection(const CategorySpec& spec, geopro::data::Dataset
 
     // 筛选行：采集时间范围（在前）+ 装置类型（在后，仅 ERT 类）。
     auto* filterRow = new QHBoxLayout();
+    filterRow->setSpacing(space::kSm);
     dateRange_ = new DateRangeEdit(body_);
     connect(dateRange_, &DateRangeEdit::rangeChanged, this, [this] { rebuildList(); });
     filterRow->addWidget(dateRange_, 1);
@@ -115,9 +142,9 @@ CategorySection::CategorySection(const CategorySpec& spec, geopro::data::Dataset
 
     root->addWidget(body_, 1);
 
-    connect(header_, &QToolButton::toggled, this, [this](bool on) {
+    connect(header_, &QToolButton::toggled, this, [this, syncHeader](bool on) {
         body_->setVisible(on);
-        header_->setArrowType(on ? Qt::DownArrow : Qt::RightArrow);
+        syncHeader();  // ▾(展开)/▸(折叠) 切换
     });
 }