#app{height:100vh;overflow:hidden}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,微软雅黑,Arial,sans-serif}#app{height:100%}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.text-center{text-align:center}.text-right{text-align:right}.mt-20{margin-top:20px}.mb-20{margin-bottom:20px}.flex-between{display:flex;justify-content:space-between;align-items:center}