page {
  color: #333;
  font-size: 16px;
  background: #f2f3f5;
  min-height: 100vh;
  box-sizing: border-box;
  padding: 0 0 100rpx;
  -webkit-font-smoothing: antialiased;
  font-family: 'PingFang SC', Helvetica, 'STHeiti STXihei', 'Microsoft YaHei', Tohoma, Arial, sans-serif;
}

.demo-margin-left {
  margin-left: 10px;
}

.demo-margin-right {
  margin-right: 10px;
}

.demo-margin-bottom {
  display: block;
  margin-bottom: 15px;
}