:check + label选择器 超方便制作表单控件https://developer.mozilla.org/en-US/docs/Web/CSS/:checked https://github.com/jawil/blog/issues/29 https://www.w3cplus.com/css/dirty-tricks-dark-corners-front-end-pt1.html 其实这些黑魔法认真看MDN全都有滴 =。=
