PyQt样式表设置QComboBox

self.comboBox_marital = QComboBox(self)
mar_list_view = QListView()
self.comboBox_marital.setView(mar_list_view)
self.comboBox_marital.addItem("已婚")
self.comboBox_marital.addItem("未婚")
self.comboBox_marital.setStyleSheet("""
　　QComboBox{font-family:Microsoft YaHei;border:1px;border-color#252525:border-radius:2px;background: #404040;font:12px;color:white;height: 20px;}
　　QComboBox:editable{background:black;}
　　QComboBox QAbstractItemView{border: 0px;outline:0px;selection-background-color: blue;height:100px;background: rgb(1,58,80);color:white;font-size:12px}
　　QComboBox QAbstractItemView::item {height:30px;}
　　QComboBox QAbstractItemView::item:selected{background-color: blue;}
　　QComboBox::down-arrow{image:url(application/resources/icons/combo_arrow.png);}
　　QComboBox::drop-down{border:0px;}
""")
self.comboBox_marital.setCurrentIndex(-1)

下拉箭头：