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%;
}