*{margin:0;padding:0;border:0;box-sizing:border-box;outline:none;}
html,body{
    margin:0;padding:0;width:100%;height:100%;overflow:hidden;position:relative;
    font-size:12px;
    background-color:#0f172a;
    font-family:Tahoma,Helvetica,Arial,"Microsoft YaHei",sans-serif;
    color:#e2e8f0;
}
/* Startup UI lives in index.html's critical style so its first paint has the final layout. */