diff --git a/app/riji/page.tsx b/app/riji/page.tsx
index 3505b0493..7ce390a7c 100644
--- a/app/riji/page.tsx
+++ b/app/riji/page.tsx
@@ -1,17 +1,21 @@
 import type { Metadata } from "next";
 
 export const metadata: Metadata = {
-  title: "RiJi — Offline Journal & Private Notes",
+  title: { absolute: "由点笔迹 - 技术支持" },
   description:
-    "RiJi is an offline-first journal and notes app that helps you record moments, thoughts, photos, and videos — privately and beautifully.",
+    "由点笔迹是一款离线笔记/日记 App，无需登录即可使用。本页提供常见问题与技术支持联系方式。",
   openGraph: {
-    title: "RiJi — Offline Journal & Private Notes",
+    title: "由点笔迹 - 技术支持",
     description:
-      "Capture your day, anytime. Offline-first journaling with private notes, photos & videos, and encrypted backups.",
+      "由点笔迹是一款离线 App，无需登录即可使用。这里提供使用帮助与技术支持联系方式。",
   },
 };
 
-export default function RiJiIntroPage() {
+const SUPPORT_EMAIL = "admin@yydd.ai";
+const SUPPORT_SUBJECT = encodeURIComponent("由点笔迹 技术支持");
+const SUPPORT_MAILTO = `mailto:${SUPPORT_EMAIL}?subject=${SUPPORT_SUBJECT}`;
+
+export default function YoudianBijIAppSupportPage() {
   return (
     <main
       className="min-h-dvh text-foreground"
@@ -31,10 +35,10 @@ export default function RiJiIntroPage() {
             </div>
             <div className="min-w-0">
               <p className="truncate text-sm font-semibold tracking-tight">
-                RiJi — Offline Journal &amp; Private Notes
+                由点笔迹
               </p>
               <p className="text-xs text-muted-foreground">
-                Offline-first journaling, private notes, and encrypted backups.
+                离线笔记 · 无需登录 · 打开即用
               </p>
             </div>
           </div>
@@ -42,82 +46,96 @@ export default function RiJiIntroPage() {
 
         <section className="relative overflow-hidden rounded-3xl border border-border bg-card/60 p-7 shadow-2xl backdrop-blur">
           <p className="mb-4 inline-flex items-center rounded-full border border-violet-500/25 bg-violet-500/10 px-3 py-1 text-xs font-semibold tracking-wide">
-            Page Title
+            App 技术支持 · App Support
           </p>
           <h1 className="mb-3 text-balance text-3xl font-semibold tracking-tight sm:text-5xl">
-            Capture your day, anytime.
+            由点笔迹 — 离线笔记/日记
           </h1>
           <p className="max-w-[70ch] text-pretty text-base leading-relaxed text-muted-foreground">
-            RiJi is an offline-first journal and notes app that helps you record moments, thoughts,
-            photos, and videos — privately and beautifully.
+            由点笔迹是一款离线 App，无需登录即可使用。若你在使用过程中遇到问题，可以先查看下方常见问题，
+            或通过邮件联系我们获取技术支持。
           </p>
         </section>
 
         <section className="mt-8">
-          <h2 className="mb-3 text-base font-semibold tracking-tight">
-            Primary Highlights
-          </h2>
+          <h2 className="mb-3 text-base font-semibold tracking-tight">核心特点</h2>
           <div className="grid grid-cols-1 gap-3 sm:grid-cols-2 lg:grid-cols-3">
             <Card
-              title="Offline First"
-              body="Your notes stay available even without a network connection."
+              title="离线可用"
+              body="没有网络也能记录，内容默认保存在设备本地。"
               className="lg:col-span-2"
             />
             <Card
-              title="Private by Design"
-              body="Protect selected notes with password and Face ID."
+              title="无需登录"
+              body="不需要注册/登录账号，安装后即可使用。"
             />
             <Card
-              title="Photos & Videos"
-              body="Add media to make every memory more vivid."
+              title="轻量记录"
+              body="专注写作与日常记录，减少干扰。"
             />
             <Card
-              title="Timeline & Calendar"
-              body="Review your life by date, timeline, or calendar view."
+              title="本地数据"
+              body="你的内容由你掌控；如启用系统备份，数据由 iOS 备份机制管理。"
             />
             <Card
-              title="Backup & Restore"
-              body="Export encrypted backups and restore anytime."
+              title="迁移建议"
+              body="更换设备时，可通过 iOS 系统备份/迁移保留数据（以系统能力为准）。"
             />
           </div>
         </section>
 
         <section className="mt-8">
-          <h2 className="mb-3 text-base font-semibold tracking-tight">About</h2>
-          <div className="rounded-2xl border border-border bg-card/50 p-5 shadow-sm">
-            <p className="text-sm leading-relaxed text-muted-foreground">
-              RiJi is designed for people who want a clean, private, and distraction-free place to
-              write daily notes. Whether you're journaling, keeping life records, or saving quick
-              thoughts, RiJi keeps everything organized and secure on your device.
-            </p>
+          <h2 className="mb-3 text-base font-semibold tracking-tight">常见问题</h2>
+          <div className="space-y-3">
+            <FaqItem
+              q="是否需要注册/登录？"
+              a="不需要。由点笔迹是一款离线应用，下载后打开即可使用。"
+            />
+            <FaqItem
+              q="数据会上传到服务器吗？"
+              a="由点笔迹默认离线运行，你的内容保存在设备本地。如你开启 iOS 系统备份/换机迁移，数据可能随系统备份进入你的 iCloud 设备备份（由 Apple 负责）。"
+            />
+            <FaqItem
+              q="遇到闪退/无法保存/显示异常怎么办？"
+              a="建议先重启 App 或重启手机；确认 iOS 系统版本与存储空间正常；如仍无法解决，请邮件联系我们并附上设备型号、iOS 版本、App 版本与问题截图/录屏。"
+            />
+            <FaqItem
+              q="如何联系技术支持？"
+              a={`请发送邮件至 ${SUPPORT_EMAIL}（建议在标题注明“由点笔迹 技术支持”）。`}
+            />
           </div>
         </section>
 
         <section className="mt-8">
-          <h2 className="mb-3 text-base font-semibold tracking-tight">Features</h2>
+          <h2 className="mb-3 text-base font-semibold tracking-tight">联系我们</h2>
           <div className="grid grid-cols-1 gap-3 sm:grid-cols-2">
             <Card
-              title="Write Freely"
-              body="Create and edit notes with text, images, and video attachments."
+              title="支持邮箱"
+              body={SUPPORT_EMAIL}
+              className="sm:col-span-1"
             />
             <Card
-              title="Stay Organized"
-              body="Browse entries in a timeline or jump through dates in calendar view."
-            />
-            <Card
-              title="Protect What Matters"
-              body="Lock private notes with a privacy password and Face ID."
-            />
-            <Card
-              title="Keep Control of Your Data"
-              body="Export encrypted backups and restore them whenever needed."
+              title="邮件建议包含"
+              body="设备型号 / iOS 版本 / App 版本 / 问题描述 / 截图或录屏"
+              className="sm:col-span-1"
             />
+            <div className="sm:col-span-2">
+              <a
+                className="inline-flex items-center justify-center rounded-xl border border-border bg-card/60 px-4 py-3 text-sm font-semibold shadow-sm transition hover:bg-card"
+                href={SUPPORT_MAILTO}
+              >
+                发送邮件获取支持
+              </a>
+              <p className="mt-2 text-xs text-muted-foreground">
+                如果你是 App Store 审核人员：由点笔迹为离线 App，无需登录即可使用。
+              </p>
+            </div>
           </div>
         </section>
 
         <footer className="mt-10 flex flex-wrap items-center justify-between gap-3 border-t border-border pt-5 text-xs text-muted-foreground">
-          <span>RiJi — Offline Journal &amp; Private Notes</span>
-          <span>A simple public app intro page for review.</span>
+          <span>由点笔迹 · 技术支持</span>
+          <span>Public support page (no login required)</span>
         </footer>
       </div>
     </main>
@@ -148,3 +166,15 @@ function Card({
   );
 }
 
+function FaqItem({ q, a }: { q: string; a: string }) {
+  return (
+    <details className="group rounded-2xl border border-border bg-card/50 p-5 shadow-sm">
+      <summary className="cursor-pointer list-none text-sm font-semibold tracking-tight">
+        <span className="select-none">{q}</span>
+        <span className="ml-2 text-muted-foreground group-open:hidden">+</span>
+        <span className="ml-2 hidden text-muted-foreground group-open:inline">−</span>
+      </summary>
+      <p className="mt-2 text-sm leading-relaxed text-muted-foreground">{a}</p>
+    </details>
+  );
+}
diff --git a/riji/README.md b/riji/README.md
index 8d9a2a8f0..483a84b91 100644
--- a/riji/README.md
+++ b/riji/README.md
@@ -1,6 +1,6 @@
-# RiJi App Intro Page (Subpage)
+# 由点笔迹 App Support Page (Subpage)
 
-This folder contains a simple, single-page public app introduction website for **RiJi — Offline Journal & Private Notes**.
+This folder contains a simple, single-page public app support website for **由点笔迹** (offline app, no login required).
 
 ## Publish as a subpage (Recommended)
 
@@ -28,7 +28,7 @@ Example redirect file (optional):
 <meta charset="utf-8" />
 <meta http-equiv="refresh" content="0; url=./riji/" />
 <title>Redirecting…</title>
-<a href="./riji/">Open RiJi page</a>
+<a href="./riji/">Open 由点笔迹 support page</a>
 ```
 
 ## If you want it as the homepage instead
diff --git a/riji/index.html b/riji/index.html
index 32ff72b93..a915a3020 100644
--- a/riji/index.html
+++ b/riji/index.html
@@ -3,15 +3,15 @@
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <title>RiJi — Offline Journal &amp; Private Notes</title>
+    <title>由点笔迹 - 技术支持</title>
     <meta
       name="description"
-      content="RiJi is an offline-first journal and notes app that helps you record moments, thoughts, photos, and videos — privately and beautifully."
+      content="由点笔迹是一款离线笔记/日记 App，无需登录即可使用。本页提供常见问题与技术支持联系方式。"
     />
-    <meta property="og:title" content="RiJi — Offline Journal &amp; Private Notes" />
+    <meta property="og:title" content="由点笔迹 - 技术支持" />
     <meta
       property="og:description"
-      content="Capture your day, anytime. Offline-first journaling with private notes, photos &amp; videos, and encrypted backups."
+      content="由点笔迹是一款离线 App，无需登录即可使用。这里提供使用帮助与技术支持联系方式。"
     />
     <meta name="theme-color" content="#0b1220" />
     <style>
@@ -247,87 +247,102 @@
         <div class="brand" aria-label="RiJi">
           <div class="mark" aria-hidden="true"></div>
           <div class="brand-text">
-            <p class="brand-title">RiJi — Offline Journal &amp; Private Notes</p>
-            <p class="brand-subtitle">Offline-first journaling, private notes, and encrypted backups.</p>
+            <p class="brand-title">由点笔迹</p>
+            <p class="brand-subtitle">离线笔记 · 无需登录 · 打开即用</p>
           </div>
         </div>
       </header>
 
       <main>
         <div class="hero">
-          <p class="eyebrow">Page Title</p>
-          <h1>Capture your day, anytime.</h1>
+          <p class="eyebrow">App 技术支持 · App Support</p>
+          <h1>由点笔迹 — 离线笔记/日记</h1>
           <p class="lead">
-            RiJi is an offline-first journal and notes app that helps you record moments, thoughts,
-            photos, and videos — privately and beautifully.
+            由点笔迹是一款离线 App，无需登录即可使用。若你在使用过程中遇到问题，可以先查看下方常见问题，
+            或通过邮件联系我们获取技术支持。
           </p>
         </div>
 
         <section aria-labelledby="highlights">
-          <h2 id="highlights">Primary Highlights</h2>
+          <h2 id="highlights">核心特点</h2>
           <div class="grid">
             <article class="card span-6">
-              <h3>Offline First</h3>
-              <p>Your notes stay available even without a network connection.</p>
+              <h3>离线可用</h3>
+              <p>没有网络也能记录，内容默认保存在设备本地。</p>
             </article>
             <article class="card span-6">
-              <h3>Private by Design</h3>
-              <p>Protect selected notes with password and Face ID.</p>
+              <h3>无需登录</h3>
+              <p>不需要注册/登录账号，安装后即可使用。</p>
             </article>
             <article class="card span-4">
-              <h3>Photos &amp; Videos</h3>
-              <p>Add media to make every memory more vivid.</p>
+              <h3>轻量记录</h3>
+              <p>专注写作与日常记录，减少干扰。</p>
             </article>
             <article class="card span-4">
-              <h3>Timeline &amp; Calendar</h3>
-              <p>Review your life by date, timeline, or calendar view.</p>
+              <h3>本地数据</h3>
+              <p>你的内容由你掌控；如启用系统备份，数据由 iOS 备份机制管理。</p>
             </article>
             <article class="card span-4">
-              <h3>Backup &amp; Restore</h3>
-              <p>Export encrypted backups and restore anytime.</p>
+              <h3>迁移建议</h3>
+              <p>更换设备时，可通过 iOS 系统备份/迁移保留数据（以系统能力为准）。</p>
             </article>
           </div>
         </section>
 
-        <section aria-labelledby="about">
-          <h2 id="about">About</h2>
-          <div class="card">
-            <p>
-              RiJi is designed for people who want a clean, private, and distraction-free place to
-              write daily notes. Whether you're journaling, keeping life records, or saving quick
-              thoughts, RiJi keeps everything organized and secure on your device.
-            </p>
+        <section aria-labelledby="faq">
+          <h2 id="faq">常见问题</h2>
+          <div class="grid">
+            <article class="card span-6">
+              <h3>是否需要注册/登录？</h3>
+              <p>不需要。由点笔迹是一款离线应用，下载后打开即可使用。</p>
+            </article>
+            <article class="card span-6">
+              <h3>数据会上传到服务器吗？</h3>
+              <p>
+                由点笔迹默认离线运行，你的内容保存在设备本地。如你开启 iOS 系统备份/换机迁移，数据可能随系统备份进入你的 iCloud 设备备份（由 Apple 负责）。
+              </p>
+            </article>
+            <article class="card span-6">
+              <h3>遇到闪退/无法保存/显示异常怎么办？</h3>
+              <p>
+                建议先重启 App 或重启手机；确认 iOS 系统版本与存储空间正常；如仍无法解决，请邮件联系我们并附上设备型号、iOS 版本、App 版本与问题截图/录屏。
+              </p>
+            </article>
+            <article class="card span-6">
+              <h3>如何联系技术支持？</h3>
+              <p>
+                请发送邮件至
+                <a href="mailto:admin@yydd.ai?subject=%E7%94%B1%E7%82%B9%E7%AC%94%E8%BF%B9%20%E6%8A%80%E6%9C%AF%E6%94%AF%E6%8C%81">admin@yydd.ai</a>
+                （建议在标题注明“由点笔迹 技术支持”）。
+              </p>
+            </article>
           </div>
         </section>
 
-        <section aria-labelledby="features">
-          <h2 id="features">Features</h2>
+        <section aria-labelledby="contact">
+          <h2 id="contact">联系我们</h2>
           <div class="grid">
             <article class="card span-6">
-              <h3>Write Freely</h3>
-              <p>Create and edit notes with text, images, and video attachments.</p>
+              <h3>支持邮箱</h3>
+              <p>
+                <a href="mailto:admin@yydd.ai?subject=%E7%94%B1%E7%82%B9%E7%AC%94%E8%BF%B9%20%E6%8A%80%E6%9C%AF%E6%94%AF%E6%8C%81">admin@yydd.ai</a>
+              </p>
             </article>
             <article class="card span-6">
-              <h3>Stay Organized</h3>
-              <p>Browse entries in a timeline or jump through dates in calendar view.</p>
-            </article>
-            <article class="card span-6">
-              <h3>Protect What Matters</h3>
-              <p>Lock private notes with a privacy password and Face ID.</p>
-            </article>
-            <article class="card span-6">
-              <h3>Keep Control of Your Data</h3>
-              <p>Export encrypted backups and restore them whenever needed.</p>
+              <h3>邮件建议包含</h3>
+              <p>设备型号 / iOS 版本 / App 版本 / 问题描述 / 截图或录屏</p>
             </article>
           </div>
+          <p class="small" style="margin: 10px 0 0">
+            如果你是 App Store 审核人员：由点笔迹为离线 App，无需登录即可使用。
+          </p>
         </section>
 
         <footer>
-          <span class="small">RiJi — Offline Journal &amp; Private Notes</span>
-          <span class="small">A simple public app intro page for review.</span>
+          <span class="small">由点笔迹 · 技术支持</span>
+          <span class="small">Public support page (no login required)</span>
         </footer>
       </main>
     </div>
   </body>
 </html>
-