diff --git a/lib/client.js b/lib/client.js
index e56cfb5..7e9b4ba 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -674,6 +674,7 @@ var EN = Object.freeze({
   "\u8BBF\u95EE\u6A21\u5F0F": "Access mode",
   "\u8BBF\u95EE\u8BBE\u7F6E": "Access settings",
   "Telegram \u8BBF\u95EE\u6A21\u5F0F": "Telegram access mode",
+  "\u67E5\u770B Telegram \u8BBF\u95EE\u6A21\u5F0F\u8BF4\u660E": "View Telegram access mode details",
   "\u7FA4\u804A\u5168\u90E8\u5FFD\u7565\uFF0C\u79C1\u804A\u4EC5\u5141\u8BB8\u767D\u540D\u5355\u7528\u6237\u3002": "All group messages are ignored; only allowlisted users may send DMs.",
   "\u4FDD\u6301\u539F\u6709\u884C\u4E3A\uFF1A\u79C1\u804A\u76F4\u63A5\u54CD\u5E94\uFF0C\u7FA4\u804A\u5728\u88AB\u63D0\u53CA\u6216\u56DE\u590D\u65F6\u54CD\u5E94\u3002": "Keep the original behavior: respond to DMs and to group mentions or replies.",
   "\u5B89\u5168\u6A21\u5F0F": "Safe mode",
@@ -6182,15 +6183,26 @@ var CSS7 = String.raw`
 .dtg-avatar { color: #fff; background: #229ed9; }
 .dtg-avatar svg { display: block; }
 .dtg-access { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 10px; background: var(--dsw-alias-bg-layer-2, #f7f8fa); }
-.dtg-accessHeading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
-.dtg-accessHeading strong { font-size: 13px; }
-.dtg-accessHeading p { margin: 3px 0 0; color: var(--dsw-alias-label-secondary, #646a73); font-size: 12px; line-height: 1.5; }
+.dtg-accessHeading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.dtg-accessHeading > strong { font-size: 13px; }
+.dtg-accessStatus { min-width: 0; display: inline-flex; align-items: center; justify-content: flex-end; gap: 6px; }
 .dtg-accessBadge { flex: none; padding: 3px 8px; border-radius: 999px; color: #1687bd; background: #eaf7fd; font-size: 11px; font-weight: 700; }
 .dtg-accessBadge[data-mode="private-allowlist"] { color: #a15c00; background: #fff3d6; }
+.dtg-accessHelp { position: relative; display: inline-flex; flex: none; }
+.dtg-accessHelpButton { width: 20px; height: 20px; display: grid; place-items: center; padding: 0; border: 1px solid color-mix(in srgb, #229ed9 28%, var(--dsw-alias-border-l2, #dfe1e5)); border-radius: 50%; color: #1687bd; background: var(--dsw-alias-bg-layer-1, #fff); font: inherit; font-size: 12px; line-height: 1; font-weight: 750; cursor: help; transition: border-color .15s ease, color .15s ease, background .15s ease, box-shadow .15s ease; }
+.dtg-accessHelpButton:hover { border-color: #229ed9; color: #1178a8; background: #eaf7fd; }
+.dtg-accessHelpButton:focus-visible { outline: none; border-color: #229ed9; box-shadow: 0 0 0 3px color-mix(in srgb, #229ed9 18%, transparent); }
+.dtg-accessTooltip { position: absolute; top: calc(100% + 8px); right: 0; z-index: 30; width: 260px; max-width: min(280px, calc(100vw - 48px)); display: grid; gap: 8px; padding: 10px 11px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 9px; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-bg-layer-3, #fff); box-shadow: 0 10px 28px rgb(31 35 41 / 16%); opacity: 0; visibility: hidden; transform: translateY(-3px); pointer-events: none; transition: opacity .15s ease, transform .15s ease, visibility .15s ease; }
+.dtg-accessTooltipItem { display: grid; gap: 2px; }
+.dtg-accessTooltipItem + .dtg-accessTooltipItem { padding-top: 8px; border-top: 1px solid var(--dsw-alias-border-l2, #eef0f3); }
+.dtg-accessTooltipItem strong { color: var(--dsw-alias-label-primary, #1f2329); font-size: 12px; line-height: 17px; font-weight: 700; }
+.dtg-accessTooltipItem > span { color: var(--dsw-alias-label-secondary, #646a73); font-size: 11px; line-height: 16px; font-weight: 400; }
+.dtg-accessHelp:hover .dtg-accessTooltip, .dtg-accessHelp:focus-within .dtg-accessTooltip { opacity: 1; visibility: visible; transform: translateY(0); }
 .dtg-accessField { display: grid; gap: 5px; color: var(--dsw-alias-label-primary, #1f2329); font-size: 12px; font-weight: 600; }
 .dtg-accessField select, .dtg-accessField textarea { width: 100%; box-sizing: border-box; border: 1px solid var(--dsw-alias-border-l1, #c9cdd4); border-radius: 7px; color: inherit; background: var(--dsw-alias-bg-layer-1, #fff); font: inherit; font-weight: 400; }
 .dtg-accessField select { height: 34px; padding: 0 9px; }
 .dtg-accessField textarea { min-height: 68px; padding: 8px 9px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
+.dtg-accessField textarea:disabled { color: var(--dsw-alias-label-tertiary, #8f959e); background: var(--dsw-alias-bg-module-platform, #f2f3f5); cursor: not-allowed; resize: none; opacity: 1; }
 .dtg-accessField small { color: var(--dsw-alias-label-secondary, #646a73); font-weight: 400; }
 .dtg-accessWarning, .dtg-accessError { margin: 0; font-size: 12px; line-height: 1.5; }
 .dtg-accessWarning { color: #a15c00; }
@@ -6228,6 +6240,7 @@ function allowedUsersFromText(value) {
 function TelegramAccessSettings({ account, busy = false, onSave }) {
   const policy = policyFor(account);
   const sourceUsers = policy.allowedUsers.join("\n");
+  const accessHelpId = React14.useId();
   const [accessMode, setAccessMode] = React14.useState(policy.accessMode);
   const [allowedUsers, setAllowedUsers] = React14.useState(sourceUsers);
   const [error, setError] = React14.useState(null);
@@ -6256,16 +6269,45 @@ function TelegramAccessSettings({ account, busy = false, onSave }) {
     h2(
       "div",
       { className: "dtg-accessHeading" },
-      h2(
-        "div",
-        null,
-        h2("strong", null, "\u8BBF\u95EE\u8BBE\u7F6E"),
-        h2("p", null, savedPrivateAllowlist ? "\u7FA4\u804A\u5168\u90E8\u5FFD\u7565\uFF0C\u79C1\u804A\u4EC5\u5141\u8BB8\u767D\u540D\u5355\u7528\u6237\u3002" : "\u4FDD\u6301\u539F\u6709\u884C\u4E3A\uFF1A\u79C1\u804A\u76F4\u63A5\u54CD\u5E94\uFF0C\u7FA4\u804A\u5728\u88AB\u63D0\u53CA\u6216\u56DE\u590D\u65F6\u54CD\u5E94\u3002")
-      ),
+      h2("strong", null, "\u8BBF\u95EE\u8BBE\u7F6E"),
       h2(
         "span",
-        { className: "dtg-accessBadge", "data-mode": policy.accessMode },
-        savedPrivateAllowlist ? "\u5DF2\u751F\u6548\uFF1A\u5B89\u5168\u6A21\u5F0F" : "\u5DF2\u751F\u6548\uFF1A\u517C\u5BB9\u6A21\u5F0F"
+        { className: "dtg-accessStatus" },
+        h2(
+          "span",
+          { className: "dtg-accessBadge", "data-mode": policy.accessMode },
+          savedPrivateAllowlist ? "\u5DF2\u751F\u6548\uFF1A\u5B89\u5168\u6A21\u5F0F" : "\u5DF2\u751F\u6548\uFF1A\u517C\u5BB9\u6A21\u5F0F"
+        ),
+        h2(
+          "span",
+          { className: "dtg-accessHelp" },
+          h2("button", {
+            type: "button",
+            className: "dtg-accessHelpButton",
+            "aria-label": "\u67E5\u770B Telegram \u8BBF\u95EE\u6A21\u5F0F\u8BF4\u660E",
+            "aria-describedby": accessHelpId
+          }, h2("span", { "aria-hidden": "true" }, "?")),
+          h2(
+            "span",
+            {
+              id: accessHelpId,
+              className: "dtg-accessTooltip",
+              role: "tooltip"
+            },
+            h2(
+              "span",
+              { className: "dtg-accessTooltipItem" },
+              h2("strong", null, "\u517C\u5BB9\u6A21\u5F0F"),
+              h2("span", null, "\u4FDD\u6301\u539F\u6709\u884C\u4E3A\uFF1A\u79C1\u804A\u76F4\u63A5\u54CD\u5E94\uFF0C\u7FA4\u804A\u5728\u88AB\u63D0\u53CA\u6216\u56DE\u590D\u65F6\u54CD\u5E94\u3002")
+            ),
+            h2(
+              "span",
+              { className: "dtg-accessTooltipItem" },
+              h2("strong", null, "\u5B89\u5168\u6A21\u5F0F"),
+              h2("span", null, "\u7FA4\u804A\u5168\u90E8\u5FFD\u7565\uFF0C\u79C1\u804A\u4EC5\u5141\u8BB8\u767D\u540D\u5355\u7528\u6237\u3002")
+            )
+          )
+        )
       )
     ),
     h2(
@@ -6293,7 +6335,7 @@ function TelegramAccessSettings({ account, busy = false, onSave }) {
       h2("span", null, "\u5141\u8BB8\u79C1\u804A\u7684 Telegram User ID"),
       h2("textarea", {
         value: allowedUsers,
-        disabled: busy,
+        disabled: busy || !privateAllowlist,
         rows: 3,
         placeholder: "\u6BCF\u884C\u4E00\u4E2A\u6570\u5B57 User ID",
         "aria-label": "\u5141\u8BB8\u79C1\u804A\u7684 Telegram User ID",
diff --git a/plugin-src/client/channels/telegram/index.js b/plugin-src/client/channels/telegram/index.js
index c2920a0..411c9c6 100644
--- a/plugin-src/client/channels/telegram/index.js
+++ b/plugin-src/client/channels/telegram/index.js
@@ -29,6 +29,7 @@ function allowedUsersFromText(value) {
 export function TelegramAccessSettings({ account, busy = false, onSave }) {
   const policy = policyFor(account);
   const sourceUsers = policy.allowedUsers.join('\n');
+  const accessHelpId = React.useId();
   const [accessMode, setAccessMode] = React.useState(policy.accessMode);
   const [allowedUsers, setAllowedUsers] = React.useState(sourceUsers);
   const [error, setError] = React.useState(null);
@@ -56,13 +57,28 @@ export function TelegramAccessSettings({ account, busy = false, onSave }) {
   const emptyAllowlist = privateAllowlist && allowedUsers.trim() === '';
   return h('form', { className: 'dtg-access', onSubmit: save },
     h('div', { className: 'dtg-accessHeading' },
-      h('div', null,
-        h('strong', null, '访问设置'),
-        h('p', null, savedPrivateAllowlist
-          ? '群聊全部忽略，私聊仅允许白名单用户。'
-          : '保持原有行为：私聊直接响应，群聊在被提及或回复时响应。')),
-      h('span', { className: 'dtg-accessBadge', 'data-mode': policy.accessMode },
-        savedPrivateAllowlist ? '已生效：安全模式' : '已生效：兼容模式')),
+      h('strong', null, '访问设置'),
+      h('span', { className: 'dtg-accessStatus' },
+        h('span', { className: 'dtg-accessBadge', 'data-mode': policy.accessMode },
+          savedPrivateAllowlist ? '已生效：安全模式' : '已生效：兼容模式'),
+        h('span', { className: 'dtg-accessHelp' },
+          h('button', {
+            type: 'button',
+            className: 'dtg-accessHelpButton',
+            'aria-label': '查看 Telegram 访问模式说明',
+            'aria-describedby': accessHelpId,
+          }, h('span', { 'aria-hidden': 'true' }, '?')),
+          h('span', {
+            id: accessHelpId,
+            className: 'dtg-accessTooltip',
+            role: 'tooltip',
+          },
+          h('span', { className: 'dtg-accessTooltipItem' },
+            h('strong', null, '兼容模式'),
+            h('span', null, '保持原有行为：私聊直接响应，群聊在被提及或回复时响应。')),
+          h('span', { className: 'dtg-accessTooltipItem' },
+            h('strong', null, '安全模式'),
+            h('span', null, '群聊全部忽略，私聊仅允许白名单用户。')))))),
     h('label', { className: 'dtg-accessField' },
       h('span', null, '模式'),
       h('select', {
@@ -77,7 +93,7 @@ export function TelegramAccessSettings({ account, busy = false, onSave }) {
       h('span', null, '允许私聊的 Telegram User ID'),
       h('textarea', {
         value: allowedUsers,
-        disabled: busy,
+        disabled: busy || !privateAllowlist,
         rows: 3,
         placeholder: '每行一个数字 User ID',
         'aria-label': '允许私聊的 Telegram User ID',
diff --git a/plugin-src/client/channels/telegram/styles.js b/plugin-src/client/channels/telegram/styles.js
index 136d5df..806c3f1 100644
--- a/plugin-src/client/channels/telegram/styles.js
+++ b/plugin-src/client/channels/telegram/styles.js
@@ -5,15 +5,26 @@ const CSS = String.raw`
 .dtg-avatar { color: #fff; background: #229ed9; }
 .dtg-avatar svg { display: block; }
 .dtg-access { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 10px; background: var(--dsw-alias-bg-layer-2, #f7f8fa); }
-.dtg-accessHeading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
-.dtg-accessHeading strong { font-size: 13px; }
-.dtg-accessHeading p { margin: 3px 0 0; color: var(--dsw-alias-label-secondary, #646a73); font-size: 12px; line-height: 1.5; }
+.dtg-accessHeading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.dtg-accessHeading > strong { font-size: 13px; }
+.dtg-accessStatus { min-width: 0; display: inline-flex; align-items: center; justify-content: flex-end; gap: 6px; }
 .dtg-accessBadge { flex: none; padding: 3px 8px; border-radius: 999px; color: #1687bd; background: #eaf7fd; font-size: 11px; font-weight: 700; }
 .dtg-accessBadge[data-mode="private-allowlist"] { color: #a15c00; background: #fff3d6; }
+.dtg-accessHelp { position: relative; display: inline-flex; flex: none; }
+.dtg-accessHelpButton { width: 20px; height: 20px; display: grid; place-items: center; padding: 0; border: 1px solid color-mix(in srgb, #229ed9 28%, var(--dsw-alias-border-l2, #dfe1e5)); border-radius: 50%; color: #1687bd; background: var(--dsw-alias-bg-layer-1, #fff); font: inherit; font-size: 12px; line-height: 1; font-weight: 750; cursor: help; transition: border-color .15s ease, color .15s ease, background .15s ease, box-shadow .15s ease; }
+.dtg-accessHelpButton:hover { border-color: #229ed9; color: #1178a8; background: #eaf7fd; }
+.dtg-accessHelpButton:focus-visible { outline: none; border-color: #229ed9; box-shadow: 0 0 0 3px color-mix(in srgb, #229ed9 18%, transparent); }
+.dtg-accessTooltip { position: absolute; top: calc(100% + 8px); right: 0; z-index: 30; width: 260px; max-width: min(280px, calc(100vw - 48px)); display: grid; gap: 8px; padding: 10px 11px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 9px; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-bg-layer-3, #fff); box-shadow: 0 10px 28px rgb(31 35 41 / 16%); opacity: 0; visibility: hidden; transform: translateY(-3px); pointer-events: none; transition: opacity .15s ease, transform .15s ease, visibility .15s ease; }
+.dtg-accessTooltipItem { display: grid; gap: 2px; }
+.dtg-accessTooltipItem + .dtg-accessTooltipItem { padding-top: 8px; border-top: 1px solid var(--dsw-alias-border-l2, #eef0f3); }
+.dtg-accessTooltipItem strong { color: var(--dsw-alias-label-primary, #1f2329); font-size: 12px; line-height: 17px; font-weight: 700; }
+.dtg-accessTooltipItem > span { color: var(--dsw-alias-label-secondary, #646a73); font-size: 11px; line-height: 16px; font-weight: 400; }
+.dtg-accessHelp:hover .dtg-accessTooltip, .dtg-accessHelp:focus-within .dtg-accessTooltip { opacity: 1; visibility: visible; transform: translateY(0); }
 .dtg-accessField { display: grid; gap: 5px; color: var(--dsw-alias-label-primary, #1f2329); font-size: 12px; font-weight: 600; }
 .dtg-accessField select, .dtg-accessField textarea { width: 100%; box-sizing: border-box; border: 1px solid var(--dsw-alias-border-l1, #c9cdd4); border-radius: 7px; color: inherit; background: var(--dsw-alias-bg-layer-1, #fff); font: inherit; font-weight: 400; }
 .dtg-accessField select { height: 34px; padding: 0 9px; }
 .dtg-accessField textarea { min-height: 68px; padding: 8px 9px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
+.dtg-accessField textarea:disabled { color: var(--dsw-alias-label-tertiary, #8f959e); background: var(--dsw-alias-bg-module-platform, #f2f3f5); cursor: not-allowed; resize: none; opacity: 1; }
 .dtg-accessField small { color: var(--dsw-alias-label-secondary, #646a73); font-weight: 400; }
 .dtg-accessWarning, .dtg-accessError { margin: 0; font-size: 12px; line-height: 1.5; }
 .dtg-accessWarning { color: #a15c00; }
diff --git a/plugin-src/client/i18n.js b/plugin-src/client/i18n.js
index d8566a6..90d482c 100644
--- a/plugin-src/client/i18n.js
+++ b/plugin-src/client/i18n.js
@@ -284,6 +284,7 @@ const EN = Object.freeze({
   '访问模式': 'Access mode',
   '访问设置': 'Access settings',
   'Telegram 访问模式': 'Telegram access mode',
+  '查看 Telegram 访问模式说明': 'View Telegram access mode details',
   '群聊全部忽略，私聊仅允许白名单用户。': 'All group messages are ignored; only allowlisted users may send DMs.',
   '保持原有行为：私聊直接响应，群聊在被提及或回复时响应。': 'Keep the original behavior: respond to DMs and to group mentions or replies.',
   '安全模式': 'Safe mode',
diff --git a/test/channels/telegram/client-ui.test.mjs b/test/channels/telegram/client-ui.test.mjs
index e8a0aba..78a72d2 100644
--- a/test/channels/telegram/client-ui.test.mjs
+++ b/test/channels/telegram/client-ui.test.mjs
@@ -1,4 +1,5 @@
 import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
 import test from 'node:test';
 
 import React from 'react';
@@ -62,13 +63,36 @@ test('Telegram access settings edits and saves one bot policy', async () => {
   });
 
   const select = renderer.root.findByProps({ 'aria-label': 'Telegram 访问模式' });
-  const textarea = renderer.root.findByProps({
+  let textarea = renderer.root.findByProps({
     'aria-label': '允许私聊的 Telegram User ID',
   });
+  assert.equal(textarea.props.disabled, true);
   await act(async () => {
     select.props.onChange({ target: { value: 'private-allowlist' } });
+  });
+  textarea = renderer.root.findByProps({
+    'aria-label': '允许私聊的 Telegram User ID',
+  });
+  assert.equal(textarea.props.disabled, false);
+  await act(async () => {
     textarea.props.onChange({ target: { value: '6087707998\n1202499116\n6087707998' } });
   });
+  await act(async () => {
+    select.props.onChange({ target: { value: 'compatible' } });
+  });
+  textarea = renderer.root.findByProps({
+    'aria-label': '允许私聊的 Telegram User ID',
+  });
+  assert.equal(textarea.props.disabled, true);
+  assert.equal(textarea.props.value, '6087707998\n1202499116\n6087707998');
+  await act(async () => {
+    select.props.onChange({ target: { value: 'private-allowlist' } });
+  });
+  textarea = renderer.root.findByProps({
+    'aria-label': '允许私聊的 Telegram User ID',
+  });
+  assert.equal(textarea.props.disabled, false);
+  assert.equal(textarea.props.value, '6087707998\n1202499116\n6087707998');
   assert.deepEqual(
     renderer.root.findByProps({ className: 'dtg-accessBadge' }).children,
     ['已生效：兼容模式'],
@@ -83,6 +107,50 @@ test('Telegram access settings edits and saves one bot policy', async () => {
   await act(async () => renderer.unmount());
 });
 
+test('Telegram access settings keeps both mode descriptions in an accessible help tooltip', async () => {
+  let renderer;
+  await act(async () => {
+    renderer = TestRenderer.create(React.createElement(TelegramAccessSettings, {
+      account: {
+        botId: 'telegram_test',
+        accessPolicy: { accessMode: 'compatible', allowedUsers: ['111111111'] },
+      },
+      onSave() {},
+    }));
+  });
+  const helpButton = renderer.root.findByProps({
+    'aria-label': '查看 Telegram 访问模式说明',
+  });
+  const tooltip = renderer.root.findByProps({ role: 'tooltip' });
+  const heading = renderer.root.findByProps({ className: 'dtg-accessHeading' });
+  assert.equal(helpButton.props.type, 'button');
+  assert.ok(tooltip.props.id);
+  assert.equal(helpButton.props['aria-describedby'], tooltip.props.id);
+  assert.equal(heading.findAllByType('p').length, 0);
+
+  const markup = renderToStaticMarkup(React.createElement(TelegramAccessSettings, {
+    account: {
+      botId: 'telegram_test',
+      accessPolicy: { accessMode: 'compatible', allowedUsers: ['111111111'] },
+    },
+    onSave() {},
+  }));
+  assert.match(markup, />兼容模式<\/strong>/);
+  assert.match(markup, />安全模式<\/strong>/);
+  assert.match(markup, /保持原有行为：私聊直接响应，群聊在被提及或回复时响应。/);
+  assert.match(markup, /群聊全部忽略，私聊仅允许白名单用户。/);
+  await act(async () => renderer.unmount());
+});
+
+test('Telegram access mode help opens for pointer hover and keyboard focus', async () => {
+  const styles = await readFile(
+    new URL('../../../plugin-src/client/channels/telegram/styles.js', import.meta.url),
+    'utf8',
+  );
+  assert.match(styles, /\.dtg-accessHelpButton:focus-visible \{/);
+  assert.match(styles, /\.dtg-accessHelp:hover \.dtg-accessTooltip, \.dtg-accessHelp:focus-within \.dtg-accessTooltip \{[^}]*opacity: 1;[^}]*visibility: visible;/);
+});
+
 test('Telegram access settings warns when safe mode has an empty allowlist', () => {
   const markup = renderToStaticMarkup(React.createElement(TelegramAccessSettings, {
     account: {