小米适配js ///rem设置大小
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=0">
<!-- meta(name="full-screen", content="yes")-->
<meta name="imagemode" content="force">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="format-detection" content="telephone=no">
<script>
!function (n) {
var e = n.document,
t = e.documentElement,
i = 640,
d = i / 100,
o = "orientationchange" in n ? "orientationchange" : "resize",
a = function () {
var n = t.clientWidth || 320;
n > 640 && (n = 640), t.style.fontSize = n / d + "px"
};
e.addEventListener && (n.addEventListener(o, a, !1), e.addEventListener("DOMContentLoaded", a, !1))
}(window);
</script>
