diff --git a/client/src/components/BottomNav.tsx b/client/src/components/BottomNav.tsx
index a2c8c93..32de789 100644
--- a/client/src/components/BottomNav.tsx
+++ b/client/src/components/BottomNav.tsx
@@ -2,7 +2,7 @@
    BOTTOM NAV — Luxsin X9 Controller (Mobile)
    Design: iOS/Android App-style bottom tab bar
    5 tabs — labels from locales/bottomNav, language = deviceState.language (同系统页)
-   - 社区：仅桌面宽屏（lg ≥1024px）显示，手机等小屏隐藏
+   - 社区：移动端进入 /community 引导复制链接；桌面（lg+）点击仍 window.open 论坛
    - Active tab: cyan icon + top indicator bar
    - Inactive: muted icon + label
    ============================================================ */
@@ -54,12 +54,6 @@ export default function BottomNav() {
     return (pack.bottomNav ?? localeZh.bottomNav) as BottomNavLocale;
   }, [deviceState?.language]);
 
-  /** 社区入口仅在桌面级视口显示（与 useIsLgUp / Tailwind lg 一致） */
-  const visibleNavItems = useMemo(
-    () => NAV_ITEMS.filter((item) => item.path !== "/community" || isLgUp),
-    [isLgUp],
-  );
-
   return (
     <nav
       className="fixed bottom-0 left-0 right-0 z-50 lg:left-1/2 lg:right-auto lg:w-[min(1180px,calc(100vw-3rem))] lg:-translate-x-1/2"
@@ -73,7 +67,7 @@ export default function BottomNav() {
       }}
     >
       <div className="flex items-stretch justify-around">
-        {visibleNavItems.map((item) => {
+        {NAV_ITEMS.map((item) => {
           const isActive =
             item.path === "/ai"
               ? location === "/ai" || (isLgUp && aiDrawerOpen)
@@ -132,15 +126,22 @@ export default function BottomNav() {
           );
 
           if (item.path === "/community") {
+            if (isLgUp) {
+              return (
+                <button
+                  key={item.path}
+                  type="button"
+                  className="cursor-pointer border-0 bg-transparent p-0 text-inherit outline-none focus-visible:ring-2 focus-visible:ring-[#00FFF6]/40 focus-visible:ring-offset-2 focus-visible:ring-offset-[rgba(10,10,12,0.96)]"
+                  onClick={() => window.open(FORUM_URL, "_blank", "noopener,noreferrer")}
+                >
+                  {inner}
+                </button>
+              );
+            }
             return (
-              <button
-                key={item.path}
-                type="button"
-                className="cursor-pointer border-0 bg-transparent p-0 text-inherit outline-none focus-visible:ring-2 focus-visible:ring-[#00FFF6]/40 focus-visible:ring-offset-2 focus-visible:ring-offset-[rgba(10,10,12,0.96)]"
-                onClick={() => window.open(FORUM_URL, "_blank", "noopener,noreferrer")}
-              >
+              <Link key={item.path} href={item.path}>
                 {inner}
-              </button>
+              </Link>
             );
           }
 
diff --git a/client/src/locales/data-en.json b/client/src/locales/data-en.json
index 951f69a..616f76c 100644
--- a/client/src/locales/data-en.json
+++ b/client/src/locales/data-en.json
@@ -11,7 +11,8 @@
     "powerOffConfirmOk": "Turn off",
     "powerOffConfirmCancel": "Cancel",
     "powerOffToastDemo": "Demo mode: disconnected from the device.",
-    "powerOffToastSent": "Shutdown command sent."
+    "powerOffToastSent": "Shutdown command sent.",
+    "doubleClickHint": "Double-click to enter"
   },
   "vuPage": {
     "title": "VU meter gallery"
@@ -23,6 +24,13 @@
     "effects": "Effects",
     "myAi": "My AI"
   },
+  "communityPage": {
+    "title": "Community",
+    "intro": "The forum opens best in your system browser. Copy the full link below, paste it into your mobile browser’s address bar, and open it.",
+    "copyLink": "Copy link",
+    "toastCopied": "Link copied",
+    "toastCopyFailed": "Could not copy. Long-press the link to copy it manually."
+  },
   "source": {
     "label": "Input/Output",
     "input": {
@@ -226,6 +234,11 @@
     "eqUi": {
       "batchEditTitle": "Batch edit",
       "batchEditHint": "11 lines total: line 1 is Preamp, lines 2–11 are Filter 1–10. Saving overwrites the current headphone preset.",
+      "addPresetTitle": "New preset",
+      "addPresetNameEmpty": "Name cannot be empty",
+      "addPresetNameExists": "That name already exists. Choose another.",
+      "toastAddPresetOk": "Preset added",
+      "toastAddPresetFail": "Failed to add preset",
       "cancel": "Cancel",
       "save": "Save",
       "tabBrands": "Brands",
@@ -275,6 +288,9 @@
     }
   },
   "dac": {
+    "sectionBalanceSensitivity": "Balance & sensitivity",
+    "sectionOutput": "Output characteristics",
+    "sectionSystemInterface": "System & interface",
     "balance": "Left-right balance",
     "sensitivity": "VU Meter Sensitivity",
     "filters": {
@@ -528,6 +544,22 @@
           "label": "60 seconds of inactivity"
         }
       ]
+    },
+    "systemPage": {
+      "sectionDisplay": "Display",
+      "sectionGeneral": "General",
+      "sectionAbout": "About",
+      "screenBrightnessDesc": "Adjust overall screen brightness",
+      "turnOffScreenDesc": "Time before the screen turns off after no activity",
+      "knobBrightnessDesc": "Brightness of the knob indicator LEDs",
+      "buttonLightDesc": "Breathing light effect on the knob when the screen is locked",
+      "languageDesc": "System display language",
+      "automaticDesc": "Return to the home screen automatically after idle time",
+      "sleepDesc": "When the device enters sleep or low-power mode",
+      "deviceName": "Device name",
+      "firmwareVersion": "Firmware version",
+      "macAddress": "MAC address",
+      "disconnect": "Disconnect"
     }
   },
   "prompt": {
diff --git a/client/src/locales/data-zh-HK.json b/client/src/locales/data-zh-HK.json
index 7508241..80665da 100644
--- a/client/src/locales/data-zh-HK.json
+++ b/client/src/locales/data-zh-HK.json
@@ -11,7 +11,8 @@
     "powerOffConfirmOk": "關閉電源",
     "powerOffConfirmCancel": "取消",
     "powerOffToastDemo": "演示模式：已中斷與裝置的連線",
-    "powerOffToastSent": "已傳送關機指令"
+    "powerOffToastSent": "已傳送關機指令",
+    "doubleClickHint": "按兩下進入"
   },
   "vuPage": {
     "title": "VU 表庫"
@@ -23,6 +24,13 @@
     "effects": "Effect",
     "myAi": "我的AI"
   },
+  "communityPage": {
+    "title": "社區",
+    "intro": "論壇需在系統瀏覽器中開啟。請複製下方完整連結，在手機瀏覽器網址列貼上並前往。",
+    "copyLink": "複製連結",
+    "toastCopied": "連結已複製",
+    "toastCopyFailed": "複製失敗，請長按連結手動複製"
+  },
   "source": {
     "label": "輸入/輸出",
     "input": { "coaxial": "同軸", "optical": "光纖", "bluetooth": "藍牙", "rca": "類比RCA" },
@@ -162,6 +170,11 @@
     "eqUi": {
       "batchEditTitle": "批次編輯",
       "batchEditHint": "共 11 行：第 1 行為 Preamp，第 2–11 行為 Filter 1–10。儲存後將覆寫目前耳機的參數。",
+      "addPresetTitle": "新增預設",
+      "addPresetNameEmpty": "名稱不能為空",
+      "addPresetNameExists": "名稱已存在，請修改後再儲存",
+      "toastAddPresetOk": "已新增預設",
+      "toastAddPresetFail": "新增預設失敗",
       "cancel": "取消",
       "save": "儲存",
       "tabBrands": "品牌",
@@ -211,6 +224,9 @@
     }
   },
   "dac": {
+    "sectionBalanceSensitivity": "平衡與靈敏度",
+    "sectionOutput": "輸出特性",
+    "sectionSystemInterface": "系統與介面",
     "balance": "左右平衡",
     "sensitivity": "VU表靈敏度",
     "filters": {
@@ -344,6 +360,22 @@
         { "index": 2, "label": "無操作40秒" },
         { "index": 3, "label": "無操作60秒" }
       ]
+    },
+    "systemPage": {
+      "sectionDisplay": "顯示",
+      "sectionGeneral": "一般",
+      "sectionAbout": "關於",
+      "screenBrightnessDesc": "調節螢幕的整體亮度",
+      "turnOffScreenDesc": "裝置無操作後自動關閉螢幕的時間",
+      "knobBrightnessDesc": "調節旋鈕指示燈的亮度",
+      "buttonLightDesc": "鎖屏後旋鈕是否顯示呼吸燈效果",
+      "languageDesc": "設定系統顯示語言",
+      "automaticDesc": "閒置一段時間後自動回到主畫面",
+      "sleepDesc": "設定裝置進入低功耗模式的時間",
+      "deviceName": "裝置名稱",
+      "firmwareVersion": "韌體版本",
+      "macAddress": "MAC 位址",
+      "disconnect": "中斷連線"
     }
   },
   "prompt": {
diff --git a/client/src/locales/data-zh.json b/client/src/locales/data-zh.json
index db42ea4..0d0e223 100644
--- a/client/src/locales/data-zh.json
+++ b/client/src/locales/data-zh.json
@@ -11,7 +11,8 @@
     "powerOffConfirmOk": "关闭电源",
     "powerOffConfirmCancel": "取消",
     "powerOffToastDemo": "演示模式：已断开与设备的连接",
-    "powerOffToastSent": "已发送关机指令"
+    "powerOffToastSent": "已发送关机指令",
+    "doubleClickHint": "双击进入"
   },
   "vuPage": {
     "title": "VU 表库"
@@ -23,6 +24,13 @@
     "effects": "Effect",
     "myAi": "我的AI"
   },
+  "communityPage": {
+    "title": "社区",
+    "intro": "论坛需在系统浏览器中打开。请复制下方完整链接，在手机浏览器地址栏粘贴并访问。",
+    "copyLink": "复制链接",
+    "toastCopied": "链接已复制",
+    "toastCopyFailed": "复制失败，请长按链接手动复制"
+  },
   "source": {
     "label": "输入输出",
     "input": { "coaxial": "同轴", "optical": "光钎", "bluetooth": "蓝牙", "rca": "模拟RCA" },
@@ -162,6 +170,11 @@
     "eqUi": {
       "batchEditTitle": "批量编辑",
       "batchEditHint": "共 11 行：第 1 行为 Preamp，第 2–11 行为 Filter 1–10。保存后将覆盖当前耳机的参数。",
+      "addPresetTitle": "新增预设",
+      "addPresetNameEmpty": "名称不能为空",
+      "addPresetNameExists": "名称已存在，请修改后再保存",
+      "toastAddPresetOk": "已新增预设",
+      "toastAddPresetFail": "新增预设失败",
       "cancel": "取消",
       "save": "保存",
       "tabBrands": "品牌",
@@ -211,6 +224,9 @@
     }
   },
   "dac": {
+    "sectionBalanceSensitivity": "平衡与灵敏度",
+    "sectionOutput": "输出特性",
+    "sectionSystemInterface": "系统与接口",
     "balance": "左右平衡",
     "sensitivity": "vu表灵敏度",
     "filters": {
@@ -345,6 +361,22 @@
         { "index": 2, "label": "无操作40秒" },
         { "index": 3, "label": "无操作60秒" }
       ]
+    },
+    "systemPage": {
+      "sectionDisplay": "显示",
+      "sectionGeneral": "通用",
+      "sectionAbout": "关于",
+      "screenBrightnessDesc": "调节屏幕的整体亮度",
+      "turnOffScreenDesc": "设备无操作后自动关闭屏幕的时间",
+      "knobBrightnessDesc": "调节旋钮指示灯的亮度",
+      "buttonLightDesc": "锁屏后旋钮是否显示呼吸灯效果",
+      "languageDesc": "设置系统显示语言",
+      "automaticDesc": "闲置一段时间后自动回到主界面",
+      "sleepDesc": "设置设备进入低功耗模式的时间",
+      "deviceName": "设备名称",
+      "firmwareVersion": "固件版本",
+      "macAddress": "MAC 地址",
+      "disconnect": "断开连接"
     }
   },
   "prompt": {
diff --git a/client/src/pages/AudioPage.tsx b/client/src/pages/AudioPage.tsx
index bca50a6..392ecaf 100644
--- a/client/src/pages/AudioPage.tsx
+++ b/client/src/pages/AudioPage.tsx
@@ -17,17 +17,40 @@ import localeZh from "@/locales/data-zh.json";
 import localeZhHK from "@/locales/data-zh-HK.json";
 import localeEn from "@/locales/data-en.json";
 
-function CyanSlider({ value, min, max, step = 1, onChange }: {
-  value: number; min: number; max: number; step?: number; onChange: (v: number) => void;
+function CyanSlider({ value, min, max, step = 1, onChange, onRelease }: {
+  value: number;
+  min: number;
+  max: number;
+  step?: number;
+  onChange: (v: number) => void;
+  /** Commit to device once when the user releases the thumb (pointer / keyboard). */
+  onRelease?: (v: number) => void;
 }) {
   const fillPct = ((value - min) / (max - min)) * 100;
+  const emitRelease = (el: EventTarget | null) => {
+    if (!(el instanceof HTMLInputElement)) return;
+    onRelease?.(Number(el.value));
+  };
   return (
     <div className="relative flex items-center w-full mt-2">
       <div className="absolute left-0 h-[4px] rounded-full pointer-events-none"
         style={{ width: `${fillPct}%`, background: "#00FFF6", boxShadow: "0 0 6px rgba(0,255,246,0.5)" }} />
-      <input type="range" min={min} max={max} step={step} value={value}
+      <input
+        type="range"
+        min={min}
+        max={max}
+        step={step}
+        value={value}
         className="cyan-slider relative z-10"
-        onChange={(e) => onChange(Number(e.target.value))} />
+        onChange={(e) => onChange(Number(e.target.value))}
+        onPointerUp={(e) => emitRelease(e.currentTarget)}
+        onPointerCancel={(e) => emitRelease(e.currentTarget)}
+        onKeyUp={(e) => {
+          if (["ArrowLeft", "ArrowRight", "ArrowUp", "ArrowDown", "Home", "End", "PageUp", "PageDown"].includes(e.key)) {
+            emitRelease(e.currentTarget);
+          }
+        }}
+      />
     </div>
   );
 }
@@ -52,6 +75,9 @@ function ListRow({ label, value, onClick }: { label: string; value: string; onCl
 
 type LocaleDac = {
   dac?: {
+    sectionBalanceSensitivity?: string;
+    sectionOutput?: string;
+    sectionSystemInterface?: string;
     balance?: string;
     sensitivity?: string;
     filters?: { label?: string; options?: Array<{ index: number; label: string }> };
@@ -137,7 +163,7 @@ export default function AudioPage() {
 
       <div className="px-4 pb-32">
         {/* ── 平衡与灵敏度 ── */}
-        <SectionHeader title="平衡与灵敏度" />
+        <SectionHeader title={dacText.sectionBalanceSensitivity ?? "平衡与灵敏度"} />
         <div className="ios-list-group px-4 py-3 space-y-4">
           <div>
             <div className="flex items-center justify-between">
@@ -146,14 +172,21 @@ export default function AudioPage() {
                 {localBalance >= 0 ? `+${localBalance.toFixed(1)}` : localBalance.toFixed(1)} dB
               </span>
             </div>
-            <CyanSlider value={localBalance} min={-15} max={15} step={0.1}
+            <CyanSlider
+              value={localBalance}
+              min={-15}
+              max={15}
+              step={0.1}
               onChange={(v) => {
                 isBalanceDragging.current = true;
                 setLocalBalance(v);
-                // 实时调用接口（例如：-13.0 → -130）
+              }}
+              onRelease={(v) => {
+                isBalanceDragging.current = false;
+                setLocalBalance(v);
                 updateSetting({ balance: Math.round(v * 10) });
-                setTimeout(() => { isBalanceDragging.current = false; }, 500);
-              }} />
+              }}
+            />
           </div>
           <div className="border-t border-white/[0.06]" />
           <div>
@@ -163,19 +196,26 @@ export default function AudioPage() {
                 {localVuSens >= 0 ? `+${localVuSens}` : localVuSens} dB
               </span>
             </div>
-            <CyanSlider value={localVuSens} min={-20} max={20}
+            <CyanSlider
+              value={localVuSens}
+              min={-20}
+              max={20}
+              step={1}
               onChange={(v) => {
                 isVuDragging.current = true;
                 setLocalVuSens(v);
-                // 接口参数需要将显示值乘以 2（例如：10dB -> vuSensor=20）
+              }}
+              onRelease={(v) => {
+                isVuDragging.current = false;
+                setLocalVuSens(v);
                 updateSetting({ vuSensor: Math.round(v * 2) });
-                setTimeout(() => { isVuDragging.current = false; }, 500);
-              }} />
+              }}
+            />
           </div>
         </div>
 
         {/* ── 输出特性 ── */}
-        <SectionHeader title="输出特性" />
+        <SectionHeader title={dacText.sectionOutput ?? "输出特性"} />
         <div className="ios-list-group">
           <ListRow
             label={dacText.filters?.label ?? "滤波特性"}
@@ -195,7 +235,7 @@ export default function AudioPage() {
         </div>
 
         {/* ── 系统与接口 ── */}
-        <SectionHeader title="系统与接口" />
+        <SectionHeader title={dacText.sectionSystemInterface ?? "系统与接口"} />
         <div className="ios-list-group">
           <ListRow
             label={dacText.xlr?.label ?? "XLR 端口极性"}
diff --git a/client/src/pages/CommunityPage.tsx b/client/src/pages/CommunityPage.tsx
index 60e12df..cf3c874 100644
--- a/client/src/pages/CommunityPage.tsx
+++ b/client/src/pages/CommunityPage.tsx
@@ -1,22 +1,114 @@
 import BottomNav from "@/components/BottomNav";
+import { useDevice } from "@/contexts/DeviceContext";
+import { useIsLgUp } from "@/hooks/useIsLgUp";
+import localeZh from "@/locales/data-zh.json";
+import localeZhHK from "@/locales/data-zh-HK.json";
+import localeEn from "@/locales/data-en.json";
+import { ChevronLeft, Copy } from "lucide-react";
+import { useMemo, useCallback } from "react";
+import { useLocation } from "wouter";
+import { toast } from "sonner";
 
-const FORUM_URL = "https://forum.zidoo.tv";
+const FORUM_URL = "https://forum.zidoo.tv/index.php";
+
+type CommunityPageLocale = NonNullable<(typeof localeZh)["communityPage"]>;
 
 export default function CommunityPage() {
+  const isLgUp = useIsLgUp();
+  const [, setLocation] = useLocation();
+  const { deviceState } = useDevice();
+
+  const text = useMemo((): CommunityPageLocale => {
+    const lang = deviceState?.language;
+    const pack = lang === 0 ? localeEn : lang === 1 ? localeZhHK : localeZh;
+    return (pack.communityPage ?? localeZh.communityPage) as CommunityPageLocale;
+  }, [deviceState?.language]);
+
+  const copyForumUrl = useCallback(async () => {
+    try {
+      await navigator.clipboard.writeText(FORUM_URL);
+      toast.success(text.toastCopied);
+    } catch {
+      try {
+        const ta = document.createElement("textarea");
+        ta.value = FORUM_URL;
+        ta.style.position = "fixed";
+        ta.style.left = "-9999px";
+        document.body.appendChild(ta);
+        ta.focus();
+        ta.select();
+        const ok = document.execCommand("copy");
+        document.body.removeChild(ta);
+        if (ok) toast.success(text.toastCopied);
+        else toast.error(text.toastCopyFailed);
+      } catch {
+        toast.error(text.toastCopyFailed);
+      }
+    }
+  }, [text.toastCopied, text.toastCopyFailed]);
+
+  if (isLgUp) {
+    return (
+      <div
+        className="h-[100dvh] flex flex-col pb-[calc(env(safe-area-inset-bottom,0px)+56px)]"
+        style={{ background: "#04060d" }}
+      >
+        <iframe
+          className="flex-1 w-full min-h-0 border-0 bg-white"
+          src={FORUM_URL}
+          title="Zidoo forum"
+          allow="fullscreen; clipboard-read; clipboard-write"
+          referrerPolicy="strict-origin-when-cross-origin"
+        />
+        <BottomNav />
+      </div>
+    );
+  }
+
   return (
-    <div
-      className="h-[100dvh] flex flex-col pb-[calc(env(safe-area-inset-bottom,0px)+56px)]"
-      style={{
-        background: "#04060d",
-      }}
-    >
-      <iframe
-        className="flex-1 w-full min-h-0 border-0 bg-white"
-        src={FORUM_URL}
-        title="Zidoo forum"
-        allow="fullscreen; clipboard-read; clipboard-write"
-        referrerPolicy="strict-origin-when-cross-origin"
-      />
+    <div className="min-h-[100dvh] bg-black flex flex-col pb-[calc(env(safe-area-inset-bottom,0px)+56px)]">
+      <div className="page-header">
+        <button
+          type="button"
+          onClick={() => setLocation("/")}
+          className="mr-4 text-white/60 active:text-white transition-colors"
+          aria-label="Back"
+        >
+          <ChevronLeft size={24} />
+        </button>
+        <h1 className="flex-1 text-center text-[17px] font-semibold text-white">{text.title}</h1>
+        <div className="w-8" />
+      </div>
+
+      <div className="flex-1 px-4 pt-4">
+        <div
+          className="ios-list-group p-4 space-y-4"
+          style={{
+            background: "linear-gradient(180deg, rgba(34,36,40,0.95) 0%, rgba(24,26,30,0.95) 100%)",
+            border: "1px solid rgba(255,255,255,0.1)",
+            borderRadius: 14,
+            boxShadow: "0 8px 32px rgba(0,0,0,0.35)",
+          }}
+        >
+          <p className="text-[15px] leading-relaxed text-white/75">{text.intro}</p>
+
+          <div
+            className="rounded-[10px] border border-white/12 bg-[#15171b] px-3 py-3 font-mono text-[12px] leading-snug break-all text-[#00FFF6]/90 select-all"
+          >
+            {FORUM_URL}
+          </div>
+
+          <button
+            type="button"
+            onClick={copyForumUrl}
+            className="flex w-full items-center justify-center gap-2 rounded-full py-3 text-[15px] font-semibold text-black transition-all active:scale-[0.98] bg-[#00FFF6] hover:brightness-95"
+          >
+            <Copy size={18} strokeWidth={2.25} />
+            {text.copyLink}
+          </button>
+        </div>
+      </div>
+
       <BottomNav />
     </div>
   );
diff --git a/client/src/pages/EQPage.tsx b/client/src/pages/EQPage.tsx
index f398ee8..19dca3e 100644
--- a/client/src/pages/EQPage.tsx
+++ b/client/src/pages/EQPage.tsx
@@ -6,7 +6,7 @@
      2. Two action cards: 批量编辑 / 添加耳机型号
      3. Headphone model row: [Name ▼] [−] [+]
      4. Freq response chart: legend + A/B + 复制到B + DIFF + SVG curve
-     5. Band grid: 10 pills (2 rows × 5)
+     5. Band grid: below lg breakpoint 2×5 pills; lg+ single row ×10
      6. Band detail card: 滤波器 / FREQ / GAIN / Q值
      7. Total gain card: 总增益 value + AUTO toggle + slider
    ============================================================ */
@@ -998,11 +998,11 @@ export default function EQPage() {
   const handleSaveAddPreset = async () => {
     const nextName = addPresetMode === "copy" ? copyPresetName.trim() : flatPresetName.trim();
     if (!nextName) {
-      toast.error("名称不能为空");
+      toast.error(eqUi.addPresetNameEmpty);
       return;
     }
     if (headphoneModels.includes(nextName)) {
-      toast.error("名称已存在，请修改后再保存");
+      toast.error(eqUi.addPresetNameExists);
       return;
     }
 
@@ -1056,9 +1056,9 @@ export default function EQPage() {
         setHeadphoneIdx(headphoneModels.length);
       }
       setIsAddPresetDialogOpen(false);
-      toast.success("已新增预设");
+      toast.success(eqUi.toastAddPresetOk);
     } catch {
-      toast.error("新增预设失败");
+      toast.error(eqUi.toastAddPresetFail);
     }
   };
 
@@ -1545,13 +1545,13 @@ export default function EQPage() {
           eqUi={eqUi}
         />
 
-        {/* ── Band grid (2 rows × 5) ── */}
+        {/* ── Band grid: 2×5 below lg, 1×10 on lg+ (typical desktop) ── */}
         <div className="ios-list-group p-3">
-          <div className="grid grid-cols-5 gap-1.5">
+          <div className="grid grid-cols-5 gap-1.5 lg:grid-cols-10 lg:gap-1">
             {bands.map((b, i) => (
               <button key={i}
                 className={cn(
-                  "flex flex-col items-center py-2.5 px-1 rounded-[10px] transition-all duration-150 active:scale-95",
+                  "flex flex-col items-center rounded-[10px] transition-all duration-150 active:scale-95 py-2.5 px-1 lg:py-2 lg:px-0.5",
                   selectedBand === i ? "text-black" : "text-white/55"
                 )}
                 style={selectedBand === i ? {
@@ -1561,8 +1561,8 @@ export default function EQPage() {
                   background: "rgba(44,44,46,0.65)",
                 }}
                 onClick={() => setSelectedBand(i)}>
-                <span className="text-[12px] font-bold leading-tight">{freqLabel(b.freq)}</span>
-                <span className="text-[9px] mt-0.5 opacity-70 leading-tight">{getFilterShortName(b.type)}</span>
+                <span className="text-[12px] font-bold leading-tight lg:text-[11px]">{freqLabel(b.freq)}</span>
+                <span className="text-[9px] mt-0.5 opacity-70 leading-tight lg:text-[8px] lg:mt-0">{getFilterShortName(b.type)}</span>
               </button>
             ))}
           </div>
@@ -1697,69 +1697,86 @@ export default function EQPage() {
       </div>
 
       {isAddPresetDialogOpen && (
-        <div className="fixed inset-0 z-[120] flex items-center justify-center bg-black/60 px-4">
+        <div className="fixed inset-0 z-[120] flex items-center justify-center bg-black/65 px-4">
           <div
             className="w-full max-w-[420px] rounded-[14px] p-5"
             style={{
-              background: "rgba(236,236,238,0.97)",
-              border: "1px solid rgba(255,255,255,0.35)",
+              background: "linear-gradient(180deg, rgba(34,36,40,0.98) 0%, rgba(24,26,30,0.98) 100%)",
+              border: "1px solid rgba(255,255,255,0.12)",
+              boxShadow: "0 18px 48px rgba(0,0,0,0.55)",
             }}
+            onClick={(e) => e.stopPropagation()}
           >
-            <div className="flex items-center justify-between mb-5">
-              <h3 className="text-[31px] text-black/75 font-semibold">新增预设</h3>
+            <div className="flex items-center justify-between mb-4">
+              <h3 className="text-[18px] font-semibold leading-tight text-white/90">{eqUi.addPresetTitle}</h3>
               <button
                 type="button"
-                className="text-black/45 hover:text-black/70 transition-colors"
+                className="rounded-full p-1.5 text-white/45 transition-colors hover:bg-white/10 hover:text-white/80"
                 onClick={() => setIsAddPresetDialogOpen(false)}
+                aria-label={eqUi.closeDrawer}
               >
                 <X size={20} />
               </button>
             </div>
 
-            <div className="space-y-4">
-              <label className="flex items-center gap-3">
+            <div className="space-y-3">
+              <label
+                className={cn(
+                  "flex cursor-pointer items-center gap-3 rounded-[12px] border border-white/10 p-3 transition-colors",
+                  addPresetMode === "copy" ? "bg-white/[0.06]" : "bg-white/[0.02] hover:bg-white/[0.04]",
+                )}
+              >
                 <input
                   type="radio"
+                  name="add-preset-mode"
                   checked={addPresetMode === "copy"}
                   onChange={() => setAddPresetMode("copy")}
-                  className="w-4 h-4"
+                  className="h-4 w-4 shrink-0 accent-[#00FFF6]"
                 />
                 <input
                   value={copyPresetName}
                   onChange={(e) => setCopyPresetName(e.target.value)}
-                  className="flex-1 h-10 px-3 rounded-[5px] text-[15px] text-black/70 bg-[#f0f0f2] border border-black/15 outline-none"
+                  onClick={(e) => e.stopPropagation()}
+                  className="h-10 min-w-0 flex-1 rounded-[10px] border border-white/12 bg-[#15171b] px-3 text-[15px] text-white/90 outline-none ring-0 ring-offset-0 placeholder:text-white/30 focus:border-white/15 focus:ring-0 focus-visible:ring-0"
                 />
               </label>
 
-              <label className="flex items-center gap-3">
+              <label
+                className={cn(
+                  "flex cursor-pointer items-center gap-3 rounded-[12px] border border-white/10 p-3 transition-colors",
+                  addPresetMode === "flat" ? "bg-white/[0.06]" : "bg-white/[0.02] hover:bg-white/[0.04]",
+                )}
+              >
                 <input
                   type="radio"
+                  name="add-preset-mode"
                   checked={addPresetMode === "flat"}
                   onChange={() => setAddPresetMode("flat")}
-                  className="w-4 h-4"
+                  className="h-4 w-4 shrink-0 accent-[#00FFF6]"
                 />
                 <input
                   value={flatPresetName}
                   onChange={(e) => setFlatPresetName(e.target.value)}
-                  className="flex-1 h-10 px-3 rounded-[5px] text-[15px] text-black/70 bg-[#f0f0f2] border border-black/15 outline-none"
+                  onClick={(e) => e.stopPropagation()}
+                  className="h-10 min-w-0 flex-1 rounded-[10px] border border-white/12 bg-[#15171b] px-3 text-[15px] text-white/90 outline-none ring-0 ring-offset-0 placeholder:text-white/30 focus:border-white/15 focus:ring-0 focus-visible:ring-0"
                 />
               </label>
             </div>
 
-            <div className="mt-6 flex items-center justify-center gap-16">
+            <div className="mt-6 flex items-center justify-center gap-4 sm:gap-8">
               <button
                 type="button"
-                className="px-5 py-2 rounded-full text-[26px] text-black/80 bg-[#d2d2d5] hover:bg-[#c7c7ca] transition-colors"
+                className="min-w-[112px] rounded-full px-5 py-2.5 text-[15px] font-medium text-white/85 transition-colors bg-[#3f4349] hover:bg-[#4a4f56] active:scale-[0.98]"
                 onClick={() => setIsAddPresetDialogOpen(false)}
               >
-                取消
+                {eqUi.cancel}
               </button>
               <button
                 type="button"
-                className="px-5 py-2 rounded-full text-[26px] text-black bg-[#00FFF6] hover:brightness-95 transition-all"
+                className="min-w-[112px] rounded-full px-5 py-2.5 text-[15px] font-semibold text-black transition-all bg-[#00FFF6] hover:brightness-95 active:scale-[0.98]"
                 onClick={handleSaveAddPreset}
               >
-                保存
+                {eqUi.save}
               </button>
             </div>
           </div>
diff --git a/client/src/pages/Home.tsx b/client/src/pages/Home.tsx
index d1d8e40..056207f 100644
--- a/client/src/pages/Home.tsx
+++ b/client/src/pages/Home.tsx
@@ -574,7 +574,12 @@ export default function Home() {
           >
             <Sliders size={22} className={(!bypassOn && ds.peqEnable === 1) ? "text-[#00FFF6]" : "text-white/60"} />
           </button>
-          <span className={cn("text-[11px]", (!bypassOn && ds.peqEnable === 1) ? "text-[#00FFF6]" : "text-white/35")}>HP-EQ</span>
+          <div className="flex flex-col items-center gap-0.5">
+            <span className={cn("text-[11px]", (!bypassOn && ds.peqEnable === 1) ? "text-[#00FFF6]" : "text-white/35")}>HP-EQ</span>
+            <span className="text-[9px] text-white/25 text-center leading-snug max-w-[76px]">
+              {homeText.doubleClickHint ?? "Double-click to enter"}
+            </span>
+          </div>
         </div>
 
         {/* Effect */}
@@ -586,7 +591,12 @@ export default function Home() {
           >
             <Activity size={22} className={(!bypassOn && effectOn) ? "text-[#00FFF6]" : "text-white/60"} />
           </button>
-          <span className={cn("text-[11px]", (!bypassOn && effectOn) ? "text-[#00FFF6]" : "text-white/35")}>Effect</span>
+          <div className="flex flex-col items-center gap-0.5">
+            <span className={cn("text-[11px]", (!bypassOn && effectOn) ? "text-[#00FFF6]" : "text-white/35")}>Effect</span>
+            <span className="text-[9px] text-white/25 text-center leading-snug max-w-[76px]">
+              {homeText.doubleClickHint ?? "Double-click to enter"}
+            </span>
+          </div>
         </div>
 
         {/* Bypass (DSP) */}
diff --git a/client/src/pages/SystemPage.tsx b/client/src/pages/SystemPage.tsx
index 29032c7..e0563be 100644
--- a/client/src/pages/SystemPage.tsx
+++ b/client/src/pages/SystemPage.tsx
@@ -67,6 +67,7 @@ function ListRow({ label, description, value, onClick, toggle, checked, onToggle
 type LocaleSettings = {
   settings: {
     vu: string;
+    vuMeter?: string;
     screenBrightness: { label: string; options: Array<{ index: number; label: string }> };
     turnOffScreen: { label: string; options: Array<{ index: number; label: string }> };
     knobBrightness: { label: string; options: Array<{ index: number; label: string }> };
@@ -75,6 +76,22 @@ type LocaleSettings = {
     Automatic: { label: string; options: Array<{ index: number; label: string }> };
     sleepTime?: { label: string; options: Array<{ index: number; label: string }> };
     sleep?: { label: string; options: Array<{ index: number; label: string }> };
+    systemPage: {
+      sectionDisplay: string;
+      sectionGeneral: string;
+      sectionAbout: string;
+      screenBrightnessDesc: string;
+      turnOffScreenDesc: string;
+      knobBrightnessDesc: string;
+      buttonLightDesc: string;
+      languageDesc: string;
+      automaticDesc: string;
+      sleepDesc: string;
+      deviceName: string;
+      firmwareVersion: string;
+      macAddress: string;
+      disconnect: string;
+    };
   };
 };
 
@@ -111,6 +128,7 @@ export default function SystemPage() {
   const knobBreathLightOn = (ds?.knob_breathlight ?? 1) === 0;
   const localeData = LOCALE_BY_LANG[langIdx] ?? localeZh;
   const settingsText = localeData.settings;
+  const ui = settingsText.systemPage;
   const SCREEN_LIGHT_OPTIONS = optionLabels(settingsText.screenBrightness?.options, ["亮", "中等", "暗"]);
   const KNOB_LIGHT_OPTIONS = optionLabels(settingsText.knobBrightness?.options, ["关闭", "亮", "中等", "暗"]);
   const SCREEN_OFF_OPTIONS = optionLabels(settingsText.turnOffScreen?.options, ["常亮", "30秒", "1分钟", "3分钟", "5分钟"]);
@@ -118,6 +136,12 @@ export default function SystemPage() {
   const AUTO_HOME_OPTIONS = optionLabels(settingsText.Automatic?.options, ["关闭", "20秒", "40秒", "60秒"]);
   const LANG_OPTIONS = optionLabels(settingsText.language?.options, ["English", "繁體中文", "简体中文"]);
 
+  const sleepRowLabel =
+    settingsText.sleepTime?.label ??
+    settingsText.sleep?.label ??
+    (localeEn as LocaleSettings).settings.sleep?.label ??
+    "Sleep";
+
   const goSelect = (title: string, options: string[], selected: number, key: string) => {
     navigateToSelect(title, options, selected, "/system", key);
     setLocation("/select");
@@ -135,49 +159,49 @@ export default function SystemPage() {
 
       <div className="px-4 pb-32">
         {/* ── 显示 ── */}
-        <SectionHeader title="显示" />
+        <SectionHeader title={ui.sectionDisplay} />
         <div className="ios-list-group">
-          <ListRow label={settingsText.screenBrightness.label} description="调节屏幕的整体亮度"
+          <ListRow label={settingsText.screenBrightness.label} description={ui.screenBrightnessDesc}
             value={SCREEN_LIGHT_OPTIONS[screenLightIdx]}
             onClick={() => goSelect(settingsText.screenBrightness.label, SCREEN_LIGHT_OPTIONS, screenLightIdx, "screenLight")} />
-          <ListRow label={settingsText.turnOffScreen.label} description="设备无操作后自动关闭屏幕的时间"
+          <ListRow label={settingsText.turnOffScreen.label} description={ui.turnOffScreenDesc}
             value={SCREEN_OFF_OPTIONS[screenOffIdx]}
             onClick={() => goSelect(settingsText.turnOffScreen.label, SCREEN_OFF_OPTIONS, screenOffIdx, "screenOff")} />
-          <ListRow label={settingsText.knobBrightness.label} description="调节旋钮指示灯的亮度"
+          <ListRow label={settingsText.knobBrightness.label} description={ui.knobBrightnessDesc}
             value={KNOB_LIGHT_OPTIONS[buttonLightIdx]}
             onClick={() => goSelect(settingsText.knobBrightness.label, KNOB_LIGHT_OPTIONS, buttonLightIdx, "buttonLight")} />
-          <ListRow label={settingsText.buttonLight.label} description="锁屏后旋钮是否显示呼吸灯效果"
+          <ListRow label={settingsText.buttonLight.label} description={ui.buttonLightDesc}
             toggle checked={knobBreathLightOn}
             onToggle={(v) => updateSetting({ knob_breathlight: v ? 0 : 1 })} />
         </div>
 
         {/* ── 通用 ── */}
-        <SectionHeader title="通用" />
+        <SectionHeader title={ui.sectionGeneral} />
         <div className="ios-list-group">
-          <ListRow label={settingsText.language.label} description="设置系统显示语言"
+          <ListRow label={settingsText.language.label} description={ui.languageDesc}
             value={LANG_OPTIONS[langIdx]}
             onClick={() => goSelect(settingsText.language.label, LANG_OPTIONS, langIdx, "language")} />
-          <ListRow label={settingsText.Automatic.label} description="闲置一段时间后自动回到主界面"
+          <ListRow label={settingsText.Automatic.label} description={ui.automaticDesc}
             value={AUTO_HOME_OPTIONS[autoHomeIdx]}
             onClick={() => goSelect(settingsText.Automatic.label, AUTO_HOME_OPTIONS, autoHomeIdx, "autoHome")} />
-          <ListRow label={settingsText.sleepTime?.label ?? settingsText.sleep?.label ?? "休眠"} description="设置设备进入低功耗模式的时间"
+          <ListRow label={sleepRowLabel} description={ui.sleepDesc}
             value={SLEEP_OPTIONS[sleepIdx]}
-            onClick={() => goSelect(settingsText.sleepTime?.label ?? settingsText.sleep?.label ?? "休眠", SLEEP_OPTIONS, sleepIdx, "sleep")} />
+            onClick={() => goSelect(sleepRowLabel, SLEEP_OPTIONS, sleepIdx, "sleep")} />
         </div>
 
         {/* ── 关于 ── */}
-        <SectionHeader title="关于" />
+        <SectionHeader title={ui.sectionAbout} />
         <div className="ios-list-group">
           <div className="ios-list-row">
-            <span className="flex-1 text-[16px] text-white">设备名称</span>
+            <span className="flex-1 text-[16px] text-white">{ui.deviceName}</span>
             <span className="ios-row-value">{ds?.device ?? "Luxsin X9"}</span>
           </div>
           <div className="ios-list-row">
-            <span className="flex-1 text-[16px] text-white">固件版本</span>
+            <span className="flex-1 text-[16px] text-white">{ui.firmwareVersion}</span>
             <span className="ios-row-value">{ds?.version ?? "—"}</span>
           </div>
           <div className="ios-list-row">
-            <span className="flex-1 text-[16px] text-white">MAC 地址</span>
+            <span className="flex-1 text-[16px] text-white">{ui.macAddress}</span>
             <span className="ios-row-value text-[12px]">{ds?.mac ?? "—"}</span>
           </div>
         </div>
@@ -188,7 +212,7 @@ export default function SystemPage() {
             className="w-full py-4 rounded-[14px] text-[16px] font-medium transition-all duration-150 active:scale-[0.98]"
             style={{ background: "rgba(239,68,68,0.1)", border: "1px solid rgba(239,68,68,0.2)", color: "#ef4444" }}
             onClick={() => { disconnect(); setLocation("/"); }}>
-            断开连接
+            {ui.disconnect}
           </button>
         </div>
       </div>