*,*:before,*:after{box-sizing:border-box}html,body,#app{margin:0;min-height:100%}body{font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif;color:#333;background:#fff}a{color:#2440b3;text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}