diff --git a/TeXmacs/misc/themes/liii-night.css b/TeXmacs/misc/themes/liii-night.css
index c4a65fcff8..a126078834 100644
--- a/TeXmacs/misc/themes/liii-night.css
+++ b/TeXmacs/misc/themes/liii-night.css
@@ -1014,13 +1014,22 @@ QWidget#centralWidget QPushButton#startup-tab-quit-btn:hover {
 
 /* 右侧内容区 */
 QWidget#centralWidget QWidget#startup-tab-content {
-  background-color: #202020;
+  background-color: #2c2c2c;
+}
+
+QWidget#centralWidget QWidget#startup-tab-file-cards,
+QWidget#centralWidget QWidget#startup-tab-category-bar,
+QWidget#centralWidget QWidget#startup-tab-template-item,
+QWidget#centralWidget QLabel#startup-tab-template-name,
+QWidget#centralWidget QLabel#startup-tab-template-info {
+  background-color: #2c2c2c;
 }
 
 /* 页面标题 */
-QLabel#startup-tab-page-title {
+QWidget#centralWidget QLabel#startup-tab-page-title {
   font-weight: bold;
   color: #ffffff;
+  background: #2c2c2c;
 }
 
 /* 页面描述文字 */
@@ -1045,6 +1054,11 @@ QPushButton#startup-tab-category-btn:checked {
   color: white;
 }
 
+/* 模板网格容器 */
+QWidget#centralWidget QWidget#startup-tab-grid {
+  background-color: #2c2c2c;
+}
+
 /* 模板缩略图卡片 */
 QFrame#startup-tab-template-card  {
   border: 1px solid #3c3c3c;
@@ -1100,9 +1114,10 @@ QFrame#startup-tab-separator {
   color: #4a4f57;
 }
 
-QLabel#startup-tab-section-title {
+QWidget#centralWidget QLabel#startup-tab-section-title {
   font-weight: 600;
   color: #f0f4f7;
+  background-color: #2c2c2c;
 }
 
 QListWidget#recent-docs-list {
@@ -1164,7 +1179,6 @@ QLabel#style-card-thumbnail {
 }
 
 QLabel#style-card-title {
-  background-color: #3a3a3a;
   color: #e2e8ee;
 }
 
diff --git a/TeXmacs/misc/themes/liii.css b/TeXmacs/misc/themes/liii.css
index 517b0a52cc..d76cae583e 100644
--- a/TeXmacs/misc/themes/liii.css
+++ b/TeXmacs/misc/themes/liii.css
@@ -1018,7 +1018,7 @@ QPushButton#startup-tab-quit-btn:hover {
 
 /* 右侧内容区 */
 QWidget#startup-tab-content {
-  background-color: #ffffff;
+  background-color: #f3f3f3;
 }
 
 /* 页面标题 */
@@ -1040,7 +1040,7 @@ QPushButton#startup-tab-category-btn {
 }
 
 QPushButton#startup-tab-category-btn:hover {
-  background: #F0F0F0;
+  background: #dfdfdf;
   color: #333333;
 }
 
@@ -1051,7 +1051,7 @@ QPushButton#startup-tab-category-btn:checked {
 
 /* 模板网格容器 */
 QWidget#startup-tab-grid {
-  background-color: #ffffff;
+  background-color: #f3f3f3;
 }
 
 /* 模板缩略图卡片 */
@@ -1136,6 +1136,7 @@ QLabel#startup-tab-recent-name {
 }
 
 QWidget#style-card {
+  background-color: #ffffff;
   border: 1px solid #cfcfcf;
   border-radius: 8px;
 }
@@ -1167,7 +1168,7 @@ QLabel#style-card-thumbnail {
 }
 
 QLabel#style-card-title {
-  background-color: #f0f0f0;
+  background-color: #ffffff;
   color: #2b3b45;
 }
 
diff --git a/src/Plugins/Qt/qt_file_page.cpp b/src/Plugins/Qt/qt_file_page.cpp
index 5235b42f2c..eb6d9db063 100644
--- a/src/Plugins/Qt/qt_file_page.cpp
+++ b/src/Plugins/Qt/qt_file_page.cpp
@@ -308,7 +308,8 @@ QtFilePage::setupStyleCards (QVBoxLayout* layout) {
 
   // 样式卡片容器（响应式网格布局）
   cardsContainer_= new QWidget (this);
-  cardsLayout_   = new QGridLayout (cardsContainer_);
+  cardsContainer_->setObjectName ("startup-tab-file-cards");
+  cardsLayout_= new QGridLayout (cardsContainer_);
   cardsLayout_->setContentsMargins (0, 0, 0, 0);
   cardsLayout_->setSpacing (DpiUtils::scaled (kStyleCardsSpacing));
   cardsLayout_->setAlignment (Qt::AlignLeft | Qt::AlignTop);
diff --git a/src/Plugins/Qt/qt_template_page.cpp b/src/Plugins/Qt/qt_template_page.cpp
index 7797b14071..ca9f87539c 100644
--- a/src/Plugins/Qt/qt_template_page.cpp
+++ b/src/Plugins/Qt/qt_template_page.cpp
@@ -140,7 +140,8 @@ QTTemplatePage::setupUI () {
   layout->addWidget (titleLabel_);
 
   // Category bar
-  categoryBar_               = new QWidget (this);
+  categoryBar_= new QWidget (this);
+  categoryBar_->setObjectName ("startup-tab-category-bar");
   QHBoxLayout* categoryLayout= new QHBoxLayout (categoryBar_);
   categoryLayout->setContentsMargins (0, 0, 0, 0);
   categoryLayout->setSpacing (DpiUtils::scaled (kCategorySpacing));
diff --git a/src/Plugins/Qt/qt_tm_widget.cpp b/src/Plugins/Qt/qt_tm_widget.cpp
index a9f994f2ec..34dcc897c8 100644
--- a/src/Plugins/Qt/qt_tm_widget.cpp
+++ b/src/Plugins/Qt/qt_tm_widget.cpp
@@ -613,7 +613,7 @@ qt_tm_widget_rep::qt_tm_widget_rep (int mask, command _quit)
   // The main layout
 
   QVBoxLayout* bl= new QVBoxLayout (cw);
-  bl->setContentsMargins (0, 1, 0, 0);
+  bl->setContentsMargins (0, 0, 0, 0);
   bl->setSpacing (0);
   cw->setLayout (bl);
   QWidget* q= main_widget->as_qwidget (); // force creation of QWidget