* {
  margin: 0;
  padding: 0;
  outline: none;
}
h1 {
  margin: 0 auto;
  font-size: 16px;
  color: #333333;
  font-weight: normal;
  line-height: 30px;
}
div.operate {
  margin: 0 auto;
  padding-top: 10px;
  font-size: 0;
}
div.operate > button {
  display: inline-block;
  vertical-align: top;
  margin-bottom: 10px;
  margin-right: 10px;
  background-color: #FF8928;
  border: none;
  border-radius: 2px;
  color: #FFFFFF;
  cursor: pointer;
  font-size: 14px;
  white-space: normal;
  word-break: break-all;
  box-sizing: border-box;
  padding: 12px;
}
pre {
  margin: 0 auto;
  background-color: #000000;
  color: #FFFFFF;
  font-size: 16px;
  box-sizing: border-box;
  padding: 12px;
  white-space: pre-wrap;
  word-break: break-all;
}