button {
  height: 28px;
  border: 1px solid transparent;
  padding: 0 14px;
  border-radius: 4px;
  user-select: none;
  color: rgba(0,0,0,.65);
  background-color: #fff;
  border-color: #d9d9d9;
}

body {
  font-family: Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
}