:root{font-family:PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;width:100%;height:100%;min-height:0;overflow:hidden}.app-layout{min-height:100vh}.app-header{color:#fff;font-size:18px;font-weight:600}.app-content{display:flex;justify-content:center;align-items:center;padding:24px}