html {
height: 100%;
background: rgb(237, 237, 237);
padding: 30px 0;
}
body {
font-family: simsun, serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
padding: 60px;
width: 595px;
margin: 0 auto;
border: 1px solid rgb(210, 213, 216);
background: white;
min-height: 100%;
}