diff --git a/app/globals.css b/app/globals.css
index b6d129c..bf2d216 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -126,4 +126,34 @@
   .zen-card {
     @apply bg-card/85 backdrop-blur-sm;
   }
+
+  /* PWA 安装后：iPad 等平板视口常 <1024px，单独放宽宽度与双栏 */
+  @media (display-mode: standalone) and (min-width: 768px) and (max-width: 1919px) {
+    .site-content-shell {
+      max-width: 72rem;
+    }
+
+    .site-content-shell-narrow {
+      max-width: 64rem;
+    }
+
+    .mode-workspace-grid {
+      grid-template-columns: repeat(2, minmax(0, 1fr));
+    }
+  }
+}
+
+/* iOS PWA 兜底：部分系统不识别 display-mode 媒体查询 */
+@media (min-width: 768px) and (max-width: 1919px) {
+  html[data-display-mode="standalone"] .site-content-shell {
+    max-width: 72rem;
+  }
+
+  html[data-display-mode="standalone"] .site-content-shell-narrow {
+    max-width: 64rem;
+  }
+
+  html[data-display-mode="standalone"] .mode-workspace-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
 }
diff --git a/app/layout.tsx b/app/layout.tsx
index f5b7dcd..fc47d96 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -3,6 +3,7 @@ import type { Metadata, Viewport } from "next";
 import React from "react";
 import Umami from "@/components/umami";
 import PwaProvider from "@/components/pwa/pwa-provider";
+import PwaDisplayMode from "@/components/pwa/pwa-display-mode";
 import { ThemeProvider } from "next-themes";
 
 export const metadata: Metadata = {
@@ -14,6 +15,10 @@ export const metadata: Metadata = {
     title: "知命阁",
     statusBarStyle: "default",
   },
+  other: {
+    "mobile-web-app-capable": "yes",
+    "apple-mobile-web-app-capable": "yes",
+  },
   manifest: "/manifest.webmanifest",
 };
 
@@ -49,6 +54,7 @@ export default function RootLayout({
           disableTransitionOnChange
         >
           {children}
+          <PwaDisplayMode />
           <PwaProvider />
         </ThemeProvider>
         <Umami />
diff --git a/app/manifest.ts b/app/manifest.ts
index d6d57d3..3b0535a 100644
--- a/app/manifest.ts
+++ b/app/manifest.ts
@@ -8,7 +8,7 @@ export default function manifest(): MetadataRoute.Manifest {
       "融合周易智慧与人工智能 — 易经学习、六爻算卦、生辰八字、综合测算",
     start_url: "/",
     display: "standalone",
-    orientation: "portrait-primary",
+    orientation: "any",
     background_color: "#f5f5f4",
     theme_color: "#525252",
     lang: "zh-CN",
diff --git a/components/footer.tsx b/components/footer.tsx
index 17fc603..6c526da 100644
--- a/components/footer.tsx
+++ b/components/footer.tsx
@@ -6,7 +6,7 @@ function Footer() {
   return (
     <footer className="relative z-10 flex items-center justify-center gap-1 border-t border-border/40 bg-card/70 py-4 text-xs text-muted-foreground/80">
       <div
-        className={`${SITE_WIDTH_INNER} flex items-center justify-center gap-1`}
+        className={`site-content-shell ${SITE_WIDTH_INNER} flex items-center justify-center gap-1`}
       >
         <span className="italic">心诚则灵</span>
         <span className="text-muted-foreground/60">·</span>
diff --git a/components/header.tsx b/components/header.tsx
index 5b23210..9654e1f 100644
--- a/components/header.tsx
+++ b/components/header.tsx
@@ -37,7 +37,7 @@ export default function Header() {
   return (
     <header className="relative z-10 border-b border-border/40 bg-card/70 py-3 shadow-sm backdrop-blur-md">
       <div
-        className={`${SITE_WIDTH_INNER} grid grid-cols-[1fr_auto] items-center gap-y-2 sm:flex sm:justify-between`}
+        className={`site-content-shell ${SITE_WIDTH_INNER} grid grid-cols-[1fr_auto] items-center gap-y-2 sm:flex sm:justify-between`}
       >
         <Link href="/" className="flex items-center gap-2">
           <TaijiIcon />
diff --git a/components/layout/mode-workspace.tsx b/components/layout/mode-workspace.tsx
index 1783f5d..e9a782c 100644
--- a/components/layout/mode-workspace.tsx
+++ b/components/layout/mode-workspace.tsx
@@ -13,7 +13,7 @@ export function ModeWorkspace({
 }) {
   return (
     <div className="py-6 lg:py-8">
-      <div className="grid gap-6 lg:grid-cols-2 lg:items-stretch lg:gap-8 xl:gap-10">
+      <div className="mode-workspace-grid grid gap-6 lg:grid-cols-2 lg:items-stretch lg:gap-8 xl:gap-10">
         <div className="grid h-full min-h-0 auto-rows-fr gap-5 lg:min-h-[calc(100vh-9rem)]">
           {children}
         </div>
diff --git a/components/page-shell.tsx b/components/page-shell.tsx
index 180cc4b..f6a41eb 100644
--- a/components/page-shell.tsx
+++ b/components/page-shell.tsx
@@ -27,7 +27,8 @@ export default function PageShell({
       <Header />
       <main
         className={cn(
-          "mx-auto flex w-full flex-1 flex-col border-border/40 bg-background sm:border-x",
+          "site-content-shell mx-auto flex w-full flex-1 flex-col border-border/40 bg-background sm:border-x",
+          width === "narrow" && "site-content-shell-narrow",
           SHELL_WIDTH[width],
           className,
         )}
diff --git a/components/pwa/pwa-display-mode.tsx b/components/pwa/pwa-display-mode.tsx
new file mode 100644
index 0000000..e0cc991
--- /dev/null
+++ b/components/pwa/pwa-display-mode.tsx
@@ -0,0 +1,19 @@
+"use client";
+
+import { useEffect } from "react";
+
+/** iOS / iPad PWA 部分版本不识别 display-mode 媒体查询，用 data 属性兜底 */
+export default function PwaDisplayMode() {
+  useEffect(() => {
+    const standalone =
+      window.matchMedia("(display-mode: standalone)").matches ||
+      (window.navigator as Navigator & { standalone?: boolean }).standalone ===
+        true;
+
+    if (standalone) {
+      document.documentElement.dataset.displayMode = "standalone";
+    }
+  }, []);
+
+  return null;
+}