diff --git a/src/components/language-switcher.tsx b/src/components/language-switcher.tsx
index ef9b272..6bd60d8 100644
--- a/src/components/language-switcher.tsx
+++ b/src/components/language-switcher.tsx
@@ -3,9 +3,10 @@
 import "@/i18n";
 
 import { ChevronDown, Globe } from "lucide-react";
-import { useEffect, useMemo, useRef, useState, type ReactNode } from "react";
+import { useMemo, useState, type ReactNode } from "react";
 import { useTranslation } from "react-i18next";
 
+import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
 import { normalizeLanguage, SUPPORTED_LANGUAGES, type AppLanguage } from "@/i18n";
 import { cn } from "@/lib/utils";
 
@@ -28,7 +29,6 @@ export function LanguageSwitcher({
   const { i18n, t } = useTranslation("common");
   const active = normalizeLanguage(i18n.language) as AppLanguage;
   const [isOpen, setIsOpen] = useState(false);
-  const containerRef = useRef<HTMLDivElement>(null);
 
   const options = useMemo(
     () =>
@@ -40,22 +40,6 @@ export function LanguageSwitcher({
     [t],
   );
 
-  useEffect(() => {
-    function handleClickOutside(event: MouseEvent): void {
-      if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
-        setIsOpen(false);
-      }
-    }
-
-    if (isOpen) {
-      document.addEventListener("mousedown", handleClickOutside);
-    }
-
-    return () => {
-      document.removeEventListener("mousedown", handleClickOutside);
-    };
-  }, [isOpen]);
-
   async function handleSelect(code: AppLanguage): Promise<void> {
     await i18n.changeLanguage(code);
     setIsOpen(false);
@@ -91,72 +75,74 @@ export function LanguageSwitcher({
     menuAlign ?? (variant === "header" || variant === "default" ? "start" : "end");
 
   return (
-    <div ref={containerRef} className={cn("relative inline-block", className)}>
-      <button
-        type="button"
-        onClick={() => setIsOpen(!isOpen)}
+    <Popover open={isOpen} onOpenChange={setIsOpen}>
+      <PopoverTrigger
+        className={cn("inline-flex", className)}
+        render={
+          <button
+            type="button"
+            className={cn(
+              "flex items-center gap-1.5 rounded-md px-2 py-1.5 text-sm font-medium transition-colors",
+              styles.button,
+            )}
+            aria-expanded={isOpen}
+            aria-haspopup="listbox"
+            aria-label={`Language (${currentLabel})`}
+          >
+            <Globe className="size-4" aria-hidden />
+            {showFlag && currentFlag ? <span className="text-base">{currentFlag}</span> : null}
+            {showLabel ? <span>{currentLabel}</span> : null}
+            <ChevronDown
+              className={cn("size-4 transition-transform duration-200", isOpen && "rotate-180")}
+              aria-hidden
+            />
+          </button>
+        }
+      />
+      <PopoverContent
+        align={align}
+        side="bottom"
+        sideOffset={6}
         className={cn(
-          "flex items-center gap-1.5 rounded-md px-2 py-1.5 text-sm font-medium transition-colors",
-          styles.button,
+          "z-[200] w-auto min-w-[min(100vw-2rem,220px)] max-w-[min(100vw-2rem,280px)] p-1 text-gray-900",
+          styles.dropdown,
         )}
-        aria-expanded={isOpen}
-        aria-haspopup="listbox"
-        aria-label={`Language (${currentLabel})`}
       >
-        <Globe className="size-4" aria-hidden />
-        {showFlag && currentFlag ? <span className="text-base">{currentFlag}</span> : null}
-        {showLabel ? <span>{currentLabel}</span> : null}
-        <ChevronDown
-          className={cn("size-4 transition-transform duration-200", isOpen && "rotate-180")}
-          aria-hidden
-        />
-      </button>
-
-      {isOpen ? (
-        <div
-          className={cn(
-            "absolute z-[100] mt-1 min-w-[min(100vw-2rem,220px)] max-w-[min(100vw-2rem,280px)] rounded-lg py-1 text-gray-900 shadow-md",
-            align === "start" ? "left-0" : "right-0",
-            styles.dropdown,
-          )}
-          role="listbox"
-        >
-          <div className="max-h-[280px] overflow-y-auto">
-            {options.map((option) => (
-              <button
-                key={option.code}
-                type="button"
-                onClick={() => void handleSelect(option.code)}
-                className={cn(
-                  "flex w-full items-center gap-2 px-3 py-2 text-left text-sm transition-colors",
-                  active === option.code ? styles.activeItem : styles.item,
-                )}
-                role="option"
-                aria-selected={active === option.code}
-              >
-                <span className="text-lg">{option.flag}</span>
-                <div className="flex flex-col leading-tight">
-                  <span className="font-medium">{option.label}</span>
-                  <span className="text-xs opacity-60">{option.short}</span>
-                </div>
-                {active === option.code ? (
-                  <svg
-                    className="ml-auto size-4 text-red-500"
-                    fill="none"
-                    viewBox="0 0 24 24"
-                    stroke="currentColor"
-                    strokeWidth={2}
-                  >
-                    <title>{option.label}</title>
-                    <path strokeLinecap="round" strokeLinejoin="round" d="M5 13l4 4L19 7" />
-                  </svg>
-                ) : null}
-              </button>
-            ))}
-          </div>
+        <div className="max-h-[min(280px,50dvh)] overflow-y-auto" role="listbox">
+          {options.map((option) => (
+            <button
+              key={option.code}
+              type="button"
+              onClick={() => void handleSelect(option.code)}
+              className={cn(
+                "flex w-full items-center gap-2 rounded-md px-3 py-2 text-left text-sm transition-colors",
+                active === option.code ? styles.activeItem : styles.item,
+              )}
+              role="option"
+              aria-selected={active === option.code}
+            >
+              <span className="text-lg">{option.flag}</span>
+              <div className="flex flex-col leading-tight">
+                <span className="font-medium">{option.label}</span>
+                <span className="text-xs opacity-60">{option.short}</span>
+              </div>
+              {active === option.code ? (
+                <svg
+                  className="ml-auto size-4 text-red-500"
+                  fill="none"
+                  viewBox="0 0 24 24"
+                  stroke="currentColor"
+                  strokeWidth={2}
+                  aria-hidden
+                >
+                  <path strokeLinecap="round" strokeLinejoin="round" d="M5 13l4 4L19 7" />
+                </svg>
+              ) : null}
+            </button>
+          ))}
         </div>
-      ) : null}
-    </div>
+      </PopoverContent>
+    </Popover>
   );
 }
 
@@ -166,6 +152,11 @@ export function LanguageSwitcherMinimal({
   className?: string;
 }): ReactNode {
   return (
-    <LanguageSwitcher variant="minimal" className={className} showFlag={false} />
+    <LanguageSwitcher
+      variant="minimal"
+      menuAlign="end"
+      className={className}
+      showFlag={false}
+    />
   );
 }
diff --git a/src/components/layout/player-panel.tsx b/src/components/layout/player-panel.tsx
index 1998b2e..61e657f 100644
--- a/src/components/layout/player-panel.tsx
+++ b/src/components/layout/player-panel.tsx
@@ -44,7 +44,12 @@ export function PlayerPanel({
           className,
         )}
       >
-        <header className={cn(playerPageHeader, "sticky top-0 z-50 bg-white/95 backdrop-blur pt-2 pb-2 -mx-3 px-3")}>
+        <header
+          className={cn(
+            playerPageHeader,
+            "sticky top-0 z-50 overflow-visible bg-white/95 backdrop-blur pt-2 pb-2 -mx-3 px-3",
+          )}
+        >
           <div className="flex min-w-0 justify-start">
             <Link
               href={backHref}
@@ -67,6 +72,7 @@ export function PlayerPanel({
           <div className="flex min-w-0 items-center justify-end gap-1">
             <LanguageSwitcher
               variant="minimal"
+              menuAlign="end"
               showFlag={false}
               className={cn(
                 playerHeaderControl,
diff --git a/src/features/hall/hall-screen.tsx b/src/features/hall/hall-screen.tsx
index 75352db..da8ece7 100644
--- a/src/features/hall/hall-screen.tsx
+++ b/src/features/hall/hall-screen.tsx
@@ -26,8 +26,8 @@ export function HallScreen() {
 
   return (
     <div className="mx-auto w-full max-w-[480px]">
-      <section className={cn("overflow-hidden bg-white text-slate-900", playerPageInset)}>
-        <header className="mb-2 flex min-h-9 items-center gap-2">
+      <section className={cn("bg-white text-slate-900", playerPageInset)}>
+        <header className="relative z-20 mb-2 flex min-h-9 items-center gap-2 overflow-visible">
           <div className="flex min-w-0 flex-1 items-center">
             <Image
               src="/logo.png"
@@ -41,6 +41,7 @@ export function HallScreen() {
           <div className="flex shrink-0 items-center gap-1">
             <LanguageSwitcher
               variant="minimal"
+              menuAlign="end"
               showFlag={false}
               className={cn(
                 playerHeaderControl,
diff --git a/src/features/rules/play-rules-screen.tsx b/src/features/rules/play-rules-screen.tsx
index 6267218..97d4b17 100644
--- a/src/features/rules/play-rules-screen.tsx
+++ b/src/features/rules/play-rules-screen.tsx
@@ -6,10 +6,11 @@ import { Loader2 } from "lucide-react";
 
 import { getPublicSettings } from "@/api";
 import { PlayerPanel } from "@/components/layout/player-panel";
+import { resolvePlayRulesHtml } from "@/lib/play-rules-html";
 import { Card, CardContent } from "@/components/ui/card";
 
 export function PlayRulesScreen() {
-  const { t } = useTranslation("player");
+  const { t, i18n } = useTranslation("player");
   const [htmlContent, setHtmlContent] = useState<string | null>(null);
   const [loading, setLoading] = useState(true);
 
@@ -17,9 +18,9 @@ export function PlayRulesScreen() {
     async function loadRules() {
       try {
         const res = await getPublicSettings("frontend");
-        const ruleItem = res.items.find((item) => item.key === "frontend.play_rules_html");
-        if (ruleItem && typeof ruleItem.value === "string" && ruleItem.value.trim() !== "") {
-          setHtmlContent(ruleItem.value);
+        const html = resolvePlayRulesHtml(res.items, i18n.language);
+        if (html) {
+          setHtmlContent(html);
         } else {
           setHtmlContent(`<div style="text-align:center;padding:2rem;color:#64748b;">${t("rules.empty", { defaultValue: "暂无玩法规则说明" })}</div>`);
         }
@@ -30,7 +31,7 @@ export function PlayRulesScreen() {
       }
     }
     void loadRules();
-  }, [t]);
+  }, [i18n.language, t]);
 
   return (
     <PlayerPanel
diff --git a/src/lib/play-rules-html.ts b/src/lib/play-rules-html.ts
new file mode 100644
index 0000000..75eaacf
--- /dev/null
+++ b/src/lib/play-rules-html.ts
@@ -0,0 +1,38 @@
+import { normalizeLanguage, type AppLanguage } from "@/i18n/language";
+
+const KEY_LEGACY = "frontend.play_rules_html";
+const KEY_ZH = "frontend.play_rules_html_zh";
+const KEY_EN = "frontend.play_rules_html_en";
+const KEY_NE = "frontend.play_rules_html_ne";
+
+type SettingItem = { key: string; value: unknown };
+
+function asNonEmptyString(value: unknown): string | null {
+  if (typeof value !== "string") {
+    return null;
+  }
+  const trimmed = value.trim();
+  return trimmed === "" ? null : trimmed;
+}
+
+/** 从 public settings 列表中按玩家语言选取玩法规则 HTML */
+export function resolvePlayRulesHtml(
+  items: SettingItem[],
+  language: string | undefined,
+): string | null {
+  const kv = new Map(items.map((item) => [item.key, item.value]));
+  const legacy = asNonEmptyString(kv.get(KEY_LEGACY));
+  const zh = asNonEmptyString(kv.get(KEY_ZH));
+  const en = asNonEmptyString(kv.get(KEY_EN));
+  const ne = asNonEmptyString(kv.get(KEY_NE));
+
+  const lang: AppLanguage = normalizeLanguage(language);
+
+  if (lang === "zh") {
+    return zh ?? legacy;
+  }
+  if (lang === "ne") {
+    return ne ?? en ?? zh ?? legacy;
+  }
+  return en ?? zh ?? legacy;
+}