• https://github.com/vector-im/element-web/issues/1276
• https://stackoverflow.com/questions/44668257/different-looks-on-scrollbars-when-using-usb-mouse-vs-wireless-trackpad-in-os-x
• https://muffinresearch.co.uk/osx-remove-scrollbars-that-appear-when-using-a-mouse/

mac真是啥离谱问题都能遇到……