html {
  font-size: 14px;  
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
    margin-bottom: 60px;
    font-size: 16px;
    font-family: -apple-system,"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft Yahei",sans-serif;
}