         let button = _TabNavigationItemButton(type: .system)
         button.translatesAutoresizingMaskIntoConstraints = false
         button.backgroundColor = UIColor.clear
-        button.titleLabel?.font = UIFont(name: "PingFangSC-Semibold", size: DefaultTabNavigationItemFontSize)
+        button.titleLabel?.font = /*UIFont(name: "PingFangSC-Semibold", size: DefaultTabNavigationItemFontSize)*/UIFont.boldSystemFont(ofSize: DefaultTabNavigationItemFontSize)
         return button
     }()
     

    let label = T()
    label.text = "AL"
    label.translatesAutoresizingMaskIntoConstraints = false
    label.font = font ?? UIFont(name: "PingFangSC-Semibold", size: DefaultTitleFontSize)
    label.textColor = .clear
    label.backgroundColor = .clear
    return label

    }
    
    private var _selectionTitleColors: [Bool: UIColor] = [true: UIColor(hex: "4A4A4A"), false: UIColor(hex: "CCCCCC")]
    private var _selectionTitleFonts: [Bool: UIFont] = [true: /*UIFont(name: "PingFangSC-Semibold", size: DefaultTitleFontSize)!*/UIFont.boldSystemFont(ofSize: DefaultTitleFontSize), false: /*UIFont(name: "PingFangSC-Semibold", size: DefaultTitleUnselectedFontSize)!*/UIFont.boldSystemFont(ofSize: DefaultTabNavigationItemFontSize)]
    
    public func setTitleColor(_ titleColor: UIColor, whenSelected selected: Bool) {
        _selectionTitleColors[selected] = titleColor
