diff --git a/reader/browser/SheetBrowser.cpp b/reader/browser/SheetBrowser.cpp
index 3677d4f3..020b7a80 100644
--- a/reader/browser/SheetBrowser.cpp
+++ b/reader/browser/SheetBrowser.cpp
@@ -62,6 +62,7 @@ SheetBrowser::SheetBrowser(DocSheet *parent) : DGraphicsView(parent), m_sheet(pa
     // qCDebug(appLog) << "Graphics scene created";
 
     setFrameShape(QFrame::NoFrame);
+    setAlignment(Qt::AlignHCenter | Qt::AlignTop);
 
     scene()->setItemIndexMethod(QGraphicsScene::NoIndex);  // 禁用场景索引（对于静态场景更高效）
 
diff --git a/reader/uiframe/CentralDocPage.cpp b/reader/uiframe/CentralDocPage.cpp
index 94dc67f6..bbb4c6b6 100644
--- a/reader/uiframe/CentralDocPage.cpp
+++ b/reader/uiframe/CentralDocPage.cpp
@@ -107,7 +107,7 @@ CentralDocPage::CentralDocPage(DWidget *parent)
 
     m_mainLayout->addWidget(m_tabBar);
     m_mainLayout->addItem(m_stackedLayout);
-    m_mainLayout->setContentsMargins(0, 0, 0, 0);
+    m_mainLayout->setContentsMargins(0, 10, 0, 0);
     m_mainLayout->setSpacing(0);
 
     this->setLayout(m_mainLayout);