#app{margin:0;font-family:微软雅黑,Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#2c3e50}:root{--bgColor: #f2f3f5}a{display:block}.vertical{margin:auto;top:0;bottom:0}.hide{display:none}input{border:none;outline:none}.middle{margin:auto;left:0;right:0}.flex-align-center{display:flex;align-items:center}