* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0); //  remove tap highlight color for mobile safari
}

*:before,
*:after {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimSun, sans-serif;
}

// unify the setting of elements's margin and padding for browsers
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td,hr,button,article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section {
  margin: 0;
  padding: 0;
}

a {
  color: _blue;
  background: transparent;
  text-decoration: none;
  outline: none;
  cursor: pointer;
}

button,input,select,textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}