(function () {
var langs = ["en", "zh-CN", "zh-TW"];
var pick = "en";
try { pick = localStorage.getItem("gp-lang") || ""; } catch (e) {}
if (langs.indexOf(pick) === -1) {
var nav = (navigator.language || "en").toLowerCase();
if (nav.indexOf("zh") === 0) {
// 繁体: zh-TW / zh-HK / zh-MO 或带 Hant 标记
pick = /tw|hk|mo|hant/.test(nav) ? "zh-TW" : "zh-CN";
} else {
pick = "en";
}
}
location.replace("./" + pick + "/");
})();