diff --git a/mainwindow.cc b/mainwindow.cc
index c4b91908..a392a616 100644
--- a/mainwindow.cc
+++ b/mainwindow.cc
@@ -445,7 +445,6 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   closeCurrentTabAction.setShortcutContext( Qt::WidgetWithChildrenShortcut );
   closeCurrentTabAction.setShortcut( QKeySequence( "Ctrl+W" ) );
   closeCurrentTabAction.setText( tr("Close current tab") );
-  closeCurrentTabAction.setIcon( QIcon(":/icons/closetab-hover.png") );
 
   connect( &closeCurrentTabAction, SIGNAL( triggered() ),
            this, SLOT( closeCurrentTab() ) );
@@ -1226,13 +1225,11 @@ void MainWindow::applyQtStyleSheet( QString const & displayStyle, QString const
   css += macCssFile.readAll();
 #endif
 
-  if ( displayStyle.size() )
-  {
-    // Load an additional stylesheet
-    QFile builtInCssFile( QString( ":/qt-style-st-%1.css" ).arg( displayStyle ) );
-    if ( builtInCssFile.open( QFile::ReadOnly ) )
-      css += builtInCssFile.readAll();
-  }
+#if defined(Q_OS_WIN)
+  QFile winCssFile( ":/qt-style-win.css" );
+  winCssFile.open( QFile::ReadOnly );
+  css += winCssFile.readAll();
+#endif
 
   // Try loading a style sheet if there's one
   QFile cssFile( Config::getUserQtCssFileName() );
diff --git a/qt-style-macos.css b/qt-style-macos.css
index 80ba54b2..e69de29b 100644
--- a/qt-style-macos.css
+++ b/qt-style-macos.css
@@ -1,32 +0,0 @@
-#navToolbar #translateLine
-{
-  margin-top: 1px;
-}
-
-#navToolbar GroupComboBox
-{
-  margin-bottom: 1px;
-  margin-top: 0px;
-  padding: 2px 18px 2px 4px;
-}
-
-#navToolbar GroupComboBox::drop-down {
-  padding-right: 2px;
-  border-right: 1px solid darkgray;
-}
-
-ScanPopup #translateLine
-{
-  padding: 3px 3px 3px 3px;
-}
-
-ScanPopup GroupComboBox
-{
-  margin: 2px 0px 4px 1px;
-  padding: 1px 18px 1px 4px;
-}
-
-ScanPopup GroupComboBox::drop-down {
-  padding-right: 2px;
-  border-right: 1px solid darkgray;
-}
diff --git a/qt-style-st-babylon.css b/qt-style-st-babylon.css
deleted file mode 100644
index 6368f32a..00000000
--- a/qt-style-st-babylon.css
+++ /dev/null
@@ -1,10 +0,0 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #searchPane #wordList, MainWindow #dictsPane #dictsList,
-MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
-
-}
-
-MainWindow #searchPane #translateLine
-{
-  font-weight: bold;
-}
diff --git a/qt-style-st-classic.css b/qt-style-st-classic.css
deleted file mode 100644
index 8d7a196e..00000000
--- a/qt-style-st-classic.css
+++ /dev/null
@@ -1,143 +0,0 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList, MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
-  background: #fefdeb;
-  color: black;
-}
-
-MainWindow #translateLine[noResults="true"],
-ScanPopup #translateLine[noResults="true"]
-{
-  background: #febb7d;
-}
-
-#navToolbar #menuButton::menu-indicator {
-  image: none;
-}
-
-#navToolbar #translateLine
-{
-  border: 1px solid gray;
-  border-radius: 3px;
-  padding: 1px 3px 2px 3px;
-  border-top-left-radius: 0px;
-  border-bottom-left-radius: 0px;
-  margin-left: 0px;
-}
-
-#navToolbar GroupComboBox
-{
-  margin-right: 0px;
-  border: 1px solid gray;
-  border-right: 1px transparent;
-  border-radius: 3px;
-  border-top-right-radius: 0px;
-  border-bottom-right-radius: 0px;
-  padding: 2px 4px 2px 4px;
-}
-
-#navToolbar GroupComboBox:on {
-  padding: 3px 3px 1px 5px;
-}
-
-#navToolbar GroupComboBox::drop-down {
-   subcontrol-origin: padding;
-   subcontrol-position: top right;
-   width: 15px;
-   border-left: 1px solid darkgray;
-   border-right: 1px transparent;
-}
-
-#navToolbar GroupComboBox::down-arrow {
-    image: url(:/icons/1downarrow.svg);
-    max-height: 100%;
-}
-
-QTabBar::close-button {
-  image: url(:/icons/closetab.svg)
-}
-QTabBar::close-button:hover {
-  image: url(:/icons/closetab-hover.png)
-}
-
-
-ArticleView #searchText[noResults="true"]
-{
-  background: #febb7d;
-}
-
-MainStatusBar #text
-{
-  border-top-right-radius: 3px;
-  border-top: 1px solid palette(dark);
-  border-right: 1px solid palette(dark);
-  background: palette(window);
-  padding: 2px;
-}
-
-MainStatusBar #icon
-{
-  border-top: 1px solid palette(dark);
-  background: palette(window);
-  padding: 2px;
-  padding-left: 4px;
-  padding-right: 0px;
-}
-
-ScanPopup #translateLine
-{
-  margin: 0px;
-  padding: 1px 3px 1px 3px;
-  border: 1px solid gray;
-  border-radius: 3px;
-  border-top-left-radius: 0px;
-  border-bottom-left-radius: 0px;
-}
-
-ScanPopup GroupComboBox
-{
-  margin: 0px 0px 0px 1px;
-  padding: 1px 4px 1px 4px;
-  border: 1px solid gray;
-  border-right: 1px transparent;
-  border-radius: 3px;
-  border-top-right-radius: 0px;
-  border-bottom-right-radius: 0px;
-}
-
-ScanPopup GroupComboBox:on {
-  padding: 3px 3px 1px 5px;
-}
-
-ScanPopup GroupComboBox::drop-down {
-   subcontrol-origin: padding;
-   subcontrol-position: top right;
-   width: 15px;
-   border-left: 1px solid darkgray;
-   border-right: 1px transparent;
-}
-
-ScanPopup GroupComboBox::down-arrow {
-   image: url(:/icons/1downarrow.svg);
-  max-height: 100%;
-}
-
-.ScanPopup #outerFrame
-{
-  border: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar #text
-{
-  border-bottom: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar[hasImage="false"] #text
-{
-  border-left: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar #icon
-{
-  border-left: 1px solid palette(dark);
-  border-bottom: 1px solid palette(dark);
-}
diff --git a/qt-style-st-lingoes-blue.css b/qt-style-st-lingoes-blue.css
deleted file mode 100644
index 4a454919..00000000
--- a/qt-style-st-lingoes-blue.css
+++ /dev/null
@@ -1,76 +0,0 @@
-MainWindow {
-    background-color: #CFDDF0;
-}
-
-MainWindow #menubar {
-    background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1,
-                      stop:0 #F0F6FF, stop:0.5 #D2E0F5, stop:0.9 #DCEBFF, stop:1 #F0F6FF);
-}
-
-MainWindow #menubar::item {
-    padding: 2px 8px;
-    background: transparent;
-}
-
-MainWindow #menubar::item:selected { /* when selected using mouse or keyboard */
-    background: #839EC7;
-}
-
-MainWindow #menubar::item:pressed {
-    background: #728AAD;
-}
-
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList {
-    background-color: #fff;
-}
-
-MainWindow #centralWidget QTabBar::tab {
-    border: 1px solid #667B9B;
-    border-bottom-color: #667B9B;
-    border-top-left-radius: 4px;
-    border-top-right-radius: 4px;
-    padding: 1px 3px;
-    margin-left: 1px;
-    margin-top: 2px;
-    margin-bottom: 2px;
-    background-color: #CFDDF0;
-    color: darkslategray;
-}
-
-MainWindow #centralWidget QTabBar::tab:selected {
-    background-color: #839EC7;
-    color: #fff;
-    border-bottom-style: none;
-}
-
-MainWindow #dictsPane #dictsList {
-   background: 	#EAF0F8; 
-   color: darkblue;
-}
-
-ArticleView #searchFrame QMenu {background-color: none}
-ArticleView QMenu {background-color: none} 
-
-QMainWindow::separator {
-     width:  1px; /* when vertical */
-     height: 1px; /* when horizontal */
-} 
-
-#dictsPaneTitleBar {
-  margin: 2px;
-} 
-
-/* Colored header for the History Pane */
-#historyPaneTitleBar {
-  margin: 2px;
-} 
-
-ScanPopup #outerFrame
-{
-   background-color: #CEDDEF;
-}
-
-ScanPopup #dictionaryBar
-{
-   background: #CEDDEF;
-}
diff --git a/qt-style-st-lingoes.css b/qt-style-st-lingoes.css
deleted file mode 100644
index e68e6ced..00000000
--- a/qt-style-st-lingoes.css
+++ /dev/null
@@ -1,5 +0,0 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList, MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
-  background: #fefdeb;
-  color: black;
-}
\ No newline at end of file
diff --git a/qt-style-st-lingvo.css b/qt-style-st-lingvo.css
deleted file mode 100644
index 3decae50..00000000
--- a/qt-style-st-lingvo.css
+++ /dev/null
@@ -1,6 +0,0 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList,
-MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
-  background: white;
-  color: black;
-}
diff --git a/qt-style-st-modern.css b/qt-style-st-modern.css
deleted file mode 100644
index 81dea89c..00000000
--- a/qt-style-st-modern.css
+++ /dev/null
@@ -1,63 +0,0 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList,
-MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
-
-}
-
-/* WARNING: hides all separators! */
-#navToolbar::separator {
-  width: 0px;
-}
-
-/* Another way to hide specific separators */
-#navToolbar #beforeOptionsSeparator, #navToolbar #beforeScanPopupSeparator, #navToolbar #afterScanPopupSeparator, #navToolbar #separatorBeforeZoom, #navToolbar #separatorBeforeSave {
-  background: rgba(0,0,0,0%);
-  width: 0px;
-  margin: -3px;
-}
-
-/* Hide various buttons in the toolbar: */
-#navToolbar #menuButtonXX, #navToolbar #soundButtonXX, #navToolbar #backButtonXX, #navToolbar #forwardButtonXX, #navToolbar #zoomInButtonXX, #navToolbar #zoomOutButtonXX, #navToolbar #zoomBaseButtonXX, #navToolbar #saveArticleButton, #navToolbar #printButton {
-  width:   0px;
-  height:  0px;
-  margin:  -3px;
-}
-
-/* remove the main toolbar handle */
-#navToolbar::handle, #dictionaryBar::handle {
-  image: none;
-}
-
-#navToolbar #scanPopupButton {
-  margin-left: 5px;
-}
-
-/* Colored header for the "Found in Dictionaries:" pane */
-#dictsPaneTitleBar {
-  margin: 2px;
-}
-
-/* Colored header for the History Pane */
-#historyPaneTitleBar {
-  margin: 2px;
-}
-
-/* Thin separators between the main UI and sidebars */
-QMainWindow::separator {
-     width:  1px; /* when vertical */
-     height: 1px; /* when horizontal */
-}
-
-ScanPopup #goBackButtonAA,
-/* ScanPopup #queryError,        */
-ScanPopup #goForwardButtonAA,
-ScanPopup #wordListButtonXX,
-ScanPopup #pronounceButtonAA,
-ScanPopup #sendWordButtonXX
-/* ScanPopup #showDictionaryBar, */
-/* ScanPopup #pinButton */
-{
-  width: 0px;
-  height: 0px;
-  margin: -4px;
-}
diff --git a/qt-style-win.css b/qt-style-win.css
new file mode 100644
index 00000000..a1acc05a
--- /dev/null
+++ b/qt-style-win.css
@@ -0,0 +1,6 @@
+QTabBar::close-button {
+    image: url(:/icons/closetab.svg)
+}
+QTabBar::close-button:hover {
+    image: url(:/icons/closetab-hover.png)
+}
\ No newline at end of file
diff --git a/qt-style.css b/qt-style.css
index 9cf529f1..4b1c87ff 100644
--- a/qt-style.css
+++ b/qt-style.css
@@ -1,140 +1,107 @@
-MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList, MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree
-{
+MainWindow #translateLine, ScanPopup #translateLine, MainWindow #wordList, MainWindow #dictsPane #dictsList, MainWindow #historyPane #historyList, MainWindow #favoritesPane #favoritesTree {
 }
 
-MainWindow #translateLine[noResults="true"],
-ScanPopup #translateLine[noResults="true"] {
+#translateLine {
+    color: palette(Text); /* ensure the text is inverse of the background, and also placehold text is grey */
+}
+
+#translateLine[noResults="true"] {
     background: #febb7d;
 }
 
 #navToolbar #menuButton::menu-indicator {
-  image: none;
+    image: none;
 }
 
-#navToolbar #translateLine
-{
-  border: 1px solid gray;
-  border-radius: 3px;
-  padding: 1px 3px 2px 3px;
-  border-top-left-radius: 0px;
-  border-bottom-left-radius: 0px;
-  margin-left: 0px;
+#navToolbar #translateLine {
+    border: 1px solid gray;
+    border-radius: 3px;
+    padding: 1px 3px 2px 3px;
+    border-top-left-radius: 0;
+    border-bottom-left-radius: 0;
+    margin-left: 0;
 }
 
-#navToolbar GroupComboBox
-{
-  margin-right: 0px;
-  border: 1px solid gray;
-  border-right: 1px transparent;
-  border-radius: 3px;
-  border-top-right-radius: 0px;
-  border-bottom-right-radius: 0px;
-  padding: 2px 4px 2px 4px;
+GroupComboBox {
+    margin-right: 0;
+    border: 1px solid gray;
+    border-right: 1px transparent;
+    border-radius: 3px;
+    border-top-right-radius: 0;
+    border-bottom-right-radius: 0;
+    padding: 2px 4px 2px 4px;
+
+    background: palette(window); /* Distinguish the combobox from the translate line by make it darker*/
+    color: palette(Text);
 }
 
-#navToolbar GroupComboBox:on {
-  padding: 3px 3px 1px 5px;
+GroupComboBox:on {
+    padding: 3px 3px 1px 5px;
 }
 
-#navToolbar GroupComboBox::drop-down {
-   subcontrol-origin: padding;
-   subcontrol-position: top right;
-   width: 15px;
-   border-left: 1px solid darkgray;
-   border-right: 1px transparent;
+GroupComboBox::drop-down {
+    subcontrol-origin: padding;
+    subcontrol-position: top right;
+    width: 15px;
+    border-left: 1px solid darkgray;
+    border-right: 1px transparent;
+
+    /* Hack: For unknown reason, if the padding right is unset, the drop-down won't show full content */
+    padding-right: 4px;
+    border-right: 1px solid darkgray;
+    /* Hack: end*/
+
 }
 
-#navToolbar GroupComboBox::down-arrow {
+GroupComboBox::down-arrow {
     image: url(:/icons/1downarrow.svg);
     max-height: 100%;
 }
 
-QTabBar::close-button {
-  image: url(:/icons/closetab.svg)
+
+ArticleView #searchText[noResults="true"] {
+    background: #febb7d;
 }
-QTabBar::close-button:hover {
-  image: url(:/icons/closetab-hover.png)
+
+MainStatusBar #text {
+    border-top-right-radius: 3px;
+    border-top: 1px solid palette(dark);
+    border-right: 1px solid palette(dark);
+    background: palette(window);
+    padding: 2px;
+}
+
+MainStatusBar #icon {
+    border-top: 1px solid palette(dark);
+    background: palette(window);
+    padding: 2px;
+    padding-left: 4px;
+    padding-right: 0;
+}
+
+ScanPopup #translateLine {
+    margin: 0;
+    padding: 1px 3px 1px 3px;
+    border: 1px solid gray;
+    border-radius: 3px;
+    border-top-left-radius: 0;
+    border-bottom-left-radius: 0;
 }
 
 
-ArticleView #searchText[noResults="true"]
-{
-  background: #febb7d;
+.ScanPopup #outerFrame {
+    border: 1px solid palette(dark);
 }
 
-MainStatusBar #text
-{
-  border-top-right-radius: 3px;
-  border-top: 1px solid palette(dark);
-  border-right: 1px solid palette(dark);
-  background: palette(window);
-  padding: 2px;
+.ScanPopup MainStatusBar #text {
+    border-bottom: 1px solid palette(dark);
 }
 
-MainStatusBar #icon
-{
-  border-top: 1px solid palette(dark);
-  background: palette(window);
-  padding: 2px;
-  padding-left: 4px;
-  padding-right: 0px;
+.ScanPopup MainStatusBar[hasImage="false"] #text {
+    border-left: 1px solid palette(dark);
 }
 
-ScanPopup #translateLine
-{
-  margin: 0px;
-  padding: 1px 3px 1px 3px;
-  border: 1px solid gray;
-  border-radius: 3px;
-  border-top-left-radius: 0px;
-  border-bottom-left-radius: 0px;
-}
-
-ScanPopup GroupComboBox
-{
-  margin: 0px 0px 0px 1px;
-  padding: 1px 4px 1px 4px;
-  border: 1px solid gray;
-  border-right: 1px transparent;
-  border-radius: 3px;
-  border-top-right-radius: 0px;
-  border-bottom-right-radius: 0px;
-}
-
-ScanPopup GroupComboBox:on {
-  padding: 3px 3px 1px 5px;
-}
-
-ScanPopup GroupComboBox::drop-down {
-   subcontrol-origin: padding;
-   subcontrol-position: top right;
-   width: 15px;
-   border-left: 1px solid darkgray;
-   border-right: 1px transparent;
-}
-
-ScanPopup GroupComboBox::down-arrow {
-   image: url(:/icons/1downarrow.svg);
-  max-height: 100%;
-}
-
-.ScanPopup #outerFrame
-{
-  border: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar #text
-{
-  border-bottom: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar[hasImage="false"] #text
-{
-  border-left: 1px solid palette(dark);
-}
-
-.ScanPopup MainStatusBar #icon
-{
-  border-left: 1px solid palette(dark);
-  border-bottom: 1px solid palette(dark);
+.ScanPopup MainStatusBar #icon {
+    border-left: 1px solid palette(dark);
+    border-bottom: 1px solid palette(dark);
 }
diff --git a/resources.qrc b/resources.qrc
index 3fedf64c..91bd81e3 100644
--- a/resources.qrc
+++ b/resources.qrc
@@ -18,7 +18,6 @@
         <file>icons/icon32_hunspell.png</file>
         <file>icons/icon32_wiki.png</file>
         <file>icons/wiktionary.png</file>
-        <file>qt-style-st-lingvo.css</file>
         <file>article-style-st-lingvo.css</file>
         <file>icons/icon_dsl_native.png</file>
         <file>icons/forvo.png</file>
@@ -31,16 +30,14 @@
         <file>icons/expand_opt.png</file>
         <file>icons/collapse_opt.png</file>
         <file>article-style-st-babylon.css</file>
-        <file>qt-style-st-babylon.css</file>
         <file>icons/menu_button.svg</file>
         <file>icons/clear.png</file>
         <file>article-style-st-modern.css</file>
-        <file>qt-style-st-modern.css</file>
         <file>article-style-st-lingoes.css</file>
         <file>icons/icon32_lingoes.png</file>
         <file>article-style-st-lingoes-blue.css</file>
-        <file>qt-style-st-lingoes-blue.css</file>
         <file>qt-style-macos.css</file>
+        <file>qt-style-win.css</file>
         <file>icons/mdict.png</file>
         <file>icons/downarrow.png</file>
         <file>icons/blank.png</file>
@@ -100,9 +97,7 @@
         <file>icons/wizard-selected.svg</file>
         <file>icons/mdict-bg.png</file>
         <file>article-style-st-classic.css</file>
-        <file>qt-style-st-classic.css</file>
         <file>icons/old-arrow.png</file>
         <file>icons/old-downarrow.png</file>
-        <file>qt-style-st-lingoes.css</file>
     </qresource>
 </RCC>
diff --git a/sonar-project.properties b/sonar-project.properties
index 4bf63e55..0318ffc8 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -1,4 +1,4 @@
-sonar.projectKey=xiaoyifang_goldendict
+sonar.projectKey=goldendict
 sonar.organization=xiaoyifang
 
 # This is the name and version displayed in the SonarCloud UI.