.unselectable, rt {
  -webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select:none;
user-select: none;
speak: none;
}
.selectable {
  -webkit-touch-callout: all;
-webkit-user-select: all;
-khtml-user-select: all;
-moz-user-select: all;
-ms-user-select: all;
-o-user-select:all;
user-select: all;
}

@font-face {
font-family: "BestKaiTi";
src: url(/static/fonts/KaiTi.ttf) format('truetype');
}

:lang(zh) {
  font-family: Helvetica, Arial, KaiTi, BestKaiTi;
}