html,body,#app{margin:0;min-height:100%;background:#fff}body{min-height:100vh}main{box-sizing:border-box;min-height:100vh;min-height:100svh;display:flex;align-items:center;justify-content:center;padding:24px}h1{margin:0;color:#555;font-family:Microsoft YaHei,PingFang SC,sans-serif;font-size:20px;font-weight:400;line-height:1.8;text-align:center}