diff --git a/lib/client.js b/lib/client.js
index 4d9e9c1..b02ee8a 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -367,6 +367,7 @@ var EN = Object.freeze({
   "IM\u673A\u5668\u4EBA\u8BBE\u7F6E": "IM bot settings",
   "IM \u6E20\u9053": "IM channels",
   "\u8BA9\u804A\u5929\u673A\u5668\u4EBA\u8F7B\u677E\u63A5\u5165 DeepSeek Harness": "Connect chatbots to DeepSeek Harness with ease",
+  "\u5E2E\u52A9\u4E0E\u53CD\u9988 \xB7 \u524D\u5F80 GitHub": "Help & feedback \xB7 Open GitHub",
   "\u5FAE\u4FE1": "WeChat",
   "\u98DE\u4E66": "Feishu",
   "\u9489\u9489": "DingTalk",
@@ -7234,10 +7235,13 @@ var CSS10 = String.raw`
 .dim-page *, .dim-page *::before, .dim-page *::after { box-sizing: border-box; }
 .dim-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 0 0 26px; }
 .dim-title p { margin: 0; color: var(--dsw-alias-label-primary, #1f2329); font-size: 14px; line-height: 20px; font-weight: 700; white-space: nowrap; }
+.dim-githubAction { position: relative; display: inline-flex; flex: none; }
 .dim-githubLink { min-height: 30px; display: inline-flex; align-items: center; gap: 5px; flex: none; padding: 0 10px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 8px; color: var(--dsw-alias-label-secondary, #646a73); background: var(--dsw-alias-bg-layer-1, #fff); font-size: 12px; line-height: normal; font-weight: 560; text-decoration: none; transition: border-color .15s ease, color .15s ease, background .15s ease; }
 .dim-githubLink:hover { border-color: #aeb3bb; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-interactive-bg-hover, #f7f8fa); }
 .dim-githubLink:focus-visible { outline: 2px solid color-mix(in srgb, var(--dim-blue) 70%, white); outline-offset: 2px; }
 .dim-githubArrow { font-size: 13px; line-height: 1; }
+.dim-githubTooltip { position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 20; width: max-content; max-width: min(220px, 80vw); padding: 6px 9px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 7px; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-bg-layer-3, #fff); box-shadow: 0 8px 24px rgb(31 35 41 / 14%); font-size: 11px; line-height: 16px; font-weight: 500; white-space: nowrap; opacity: 0; visibility: hidden; transform: translateY(3px); pointer-events: none; transition: opacity .15s ease, transform .15s ease, visibility .15s ease; }
+.dim-githubAction:hover .dim-githubTooltip, .dim-githubAction:focus-within .dim-githubTooltip { opacity: 1; visibility: visible; transform: translateY(0); }
 .dim-layout { display: grid; grid-template-columns: 174px 1px minmax(0, 1fr); gap: 24px; align-items: start; }
 .dim-rail { max-height: 520px; display: grid; align-content: start; gap: 8px; overflow-y: auto; padding: 1px 4px 1px 1px; scrollbar-width: thin; scrollbar-color: var(--dsw-alias-border-l2, #dfe1e5) transparent; }
 .dim-rail::-webkit-scrollbar { width: 4px; }
@@ -7407,6 +7411,7 @@ var CSS10 = String.raw`
 @media (max-width: 560px) {
   .dim-title { flex-direction: column; gap: 10px; }
   .dim-title p { white-space: normal; }
+  .dim-githubTooltip { right: auto; left: 0; }
   .dim-rail { grid-template-columns: minmax(0, 1fr); }
 }
 @media (prefers-reduced-motion: reduce) {
@@ -7519,6 +7524,7 @@ function IMSettingsTab({
   whatsappRpcCall
 }) {
   const [selected, setSelected] = React13.useState("weixin");
+  const githubTooltipId = React13.useId();
   const active = CHANNELS.find((channel4) => channel4.id === selected) ?? CHANNELS[0];
   return h2(
     "section",
@@ -7528,16 +7534,26 @@ function IMSettingsTab({
       { className: "dim-title" },
       h2("p", null, "\u8BA9\u804A\u5929\u673A\u5668\u4EBA\u8F7B\u677E\u63A5\u5165 DeepSeek Harness"),
       h2(
-        "a",
-        {
-          className: "dim-githubLink",
-          href: "https://github.com/xmanrui/dsh-im",
-          target: "_blank",
-          rel: "noopener noreferrer",
-          "aria-label": "dsh-im GitHub"
-        },
-        h2("span", null, "GitHub"),
-        h2("span", { className: "dim-githubArrow", "aria-hidden": "true" }, "\u2197")
+        "span",
+        { className: "dim-githubAction" },
+        h2(
+          "a",
+          {
+            className: "dim-githubLink",
+            href: "https://github.com/xmanrui/dsh-im",
+            target: "_blank",
+            rel: "noopener noreferrer",
+            "aria-label": "dsh-im GitHub",
+            "aria-describedby": githubTooltipId
+          },
+          h2("span", null, "GitHub"),
+          h2("span", { className: "dim-githubArrow", "aria-hidden": "true" }, "\u2197")
+        ),
+        h2("span", {
+          id: githubTooltipId,
+          className: "dim-githubTooltip",
+          role: "tooltip"
+        }, "\u5E2E\u52A9\u4E0E\u53CD\u9988 \xB7 \u524D\u5F80 GitHub")
       )
     ),
     h2(
diff --git a/plugin-src/client/i18n.js b/plugin-src/client/i18n.js
index 8df5f02..29136b4 100644
--- a/plugin-src/client/i18n.js
+++ b/plugin-src/client/i18n.js
@@ -8,6 +8,7 @@ const EN = Object.freeze({
   'IM机器人设置': 'IM bot settings',
   'IM 渠道': 'IM channels',
   '让聊天机器人轻松接入 DeepSeek Harness': 'Connect chatbots to DeepSeek Harness with ease',
+  '帮助与反馈 · 前往 GitHub': 'Help & feedback · Open GitHub',
   '微信': 'WeChat',
   '飞书': 'Feishu',
   '钉钉': 'DingTalk',
diff --git a/plugin-src/client/index.js b/plugin-src/client/index.js
index 62602f4..d110994 100644
--- a/plugin-src/client/index.js
+++ b/plugin-src/client/index.js
@@ -122,19 +122,27 @@ export function IMSettingsTab({
   whatsappRpcCall,
 }) {
   const [selected, setSelected] = React.useState('weixin');
+  const githubTooltipId = React.useId();
   const active = CHANNELS.find((channel) => channel.id === selected) ?? CHANNELS[0];
   return h('section', { className: 'dim-page', 'aria-label': 'IM机器人设置' },
     h('header', { className: 'dim-title' },
       h('p', null, '让聊天机器人轻松接入 DeepSeek Harness'),
-      h('a', {
-        className: 'dim-githubLink',
-        href: 'https://github.com/xmanrui/dsh-im',
-        target: '_blank',
-        rel: 'noopener noreferrer',
-        'aria-label': 'dsh-im GitHub',
-      },
-      h('span', null, 'GitHub'),
-      h('span', { className: 'dim-githubArrow', 'aria-hidden': 'true' }, '↗')),
+      h('span', { className: 'dim-githubAction' },
+        h('a', {
+          className: 'dim-githubLink',
+          href: 'https://github.com/xmanrui/dsh-im',
+          target: '_blank',
+          rel: 'noopener noreferrer',
+          'aria-label': 'dsh-im GitHub',
+          'aria-describedby': githubTooltipId,
+        },
+        h('span', null, 'GitHub'),
+        h('span', { className: 'dim-githubArrow', 'aria-hidden': 'true' }, '↗')),
+        h('span', {
+          id: githubTooltipId,
+          className: 'dim-githubTooltip',
+          role: 'tooltip',
+        }, '帮助与反馈 · 前往 GitHub')),
     ),
     h('div', { className: 'dim-layout' },
       h('nav', { className: 'dim-rail', role: 'tablist', 'aria-label': 'IM 渠道' },
diff --git a/plugin-src/client/styles.js b/plugin-src/client/styles.js
index 7a2db4f..9271b1a 100644
--- a/plugin-src/client/styles.js
+++ b/plugin-src/client/styles.js
@@ -13,10 +13,13 @@ const CSS = String.raw`
 .dim-page *, .dim-page *::before, .dim-page *::after { box-sizing: border-box; }
 .dim-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 0 0 26px; }
 .dim-title p { margin: 0; color: var(--dsw-alias-label-primary, #1f2329); font-size: 14px; line-height: 20px; font-weight: 700; white-space: nowrap; }
+.dim-githubAction { position: relative; display: inline-flex; flex: none; }
 .dim-githubLink { min-height: 30px; display: inline-flex; align-items: center; gap: 5px; flex: none; padding: 0 10px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 8px; color: var(--dsw-alias-label-secondary, #646a73); background: var(--dsw-alias-bg-layer-1, #fff); font-size: 12px; line-height: normal; font-weight: 560; text-decoration: none; transition: border-color .15s ease, color .15s ease, background .15s ease; }
 .dim-githubLink:hover { border-color: #aeb3bb; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-interactive-bg-hover, #f7f8fa); }
 .dim-githubLink:focus-visible { outline: 2px solid color-mix(in srgb, var(--dim-blue) 70%, white); outline-offset: 2px; }
 .dim-githubArrow { font-size: 13px; line-height: 1; }
+.dim-githubTooltip { position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 20; width: max-content; max-width: min(220px, 80vw); padding: 6px 9px; border: 1px solid var(--dsw-alias-border-l2, #dfe1e5); border-radius: 7px; color: var(--dsw-alias-label-primary, #1f2329); background: var(--dsw-alias-bg-layer-3, #fff); box-shadow: 0 8px 24px rgb(31 35 41 / 14%); font-size: 11px; line-height: 16px; font-weight: 500; white-space: nowrap; opacity: 0; visibility: hidden; transform: translateY(3px); pointer-events: none; transition: opacity .15s ease, transform .15s ease, visibility .15s ease; }
+.dim-githubAction:hover .dim-githubTooltip, .dim-githubAction:focus-within .dim-githubTooltip { opacity: 1; visibility: visible; transform: translateY(0); }
 .dim-layout { display: grid; grid-template-columns: 174px 1px minmax(0, 1fr); gap: 24px; align-items: start; }
 .dim-rail { max-height: 520px; display: grid; align-content: start; gap: 8px; overflow-y: auto; padding: 1px 4px 1px 1px; scrollbar-width: thin; scrollbar-color: var(--dsw-alias-border-l2, #dfe1e5) transparent; }
 .dim-rail::-webkit-scrollbar { width: 4px; }
@@ -186,6 +189,7 @@ const CSS = String.raw`
 @media (max-width: 560px) {
   .dim-title { flex-direction: column; gap: 10px; }
   .dim-title p { white-space: normal; }
+  .dim-githubTooltip { right: auto; left: 0; }
   .dim-rail { grid-template-columns: minmax(0, 1fr); }
 }
 @media (prefers-reduced-motion: reduce) {
diff --git a/test/client-ui.test.mjs b/test/client-ui.test.mjs
index 614218d..cb8d0ec 100644
--- a/test/client-ui.test.mjs
+++ b/test/client-ui.test.mjs
@@ -116,8 +116,12 @@ test('IM settings renders nine compact logo channel tabs without enable switches
   assert.match(markup, /target="_blank"/);
   assert.match(markup, /rel="noopener noreferrer"/);
   assert.match(markup, /aria-label="dsh-im GitHub"/);
+  assert.match(markup, /aria-describedby="[^"]+"/);
+  assert.match(markup, /role="tooltip"[^>]*>帮助与反馈 · 前往 GitHub</);
   assert.match(styles, /\.dim-title p \{[^}]*color: var\(--dsw-alias-label-primary, #1f2329\);[^}]*font-size: 14px;[^}]*font-weight: 700;/);
   assert.match(styles, /\.dim-githubLink \{[^}]*border: 1px solid var\(--dsw-alias-border-l2, #dfe1e5\);[^}]*text-decoration: none;/);
+  assert.match(styles, /\.dim-githubTooltip \{[^}]*bottom: calc\(100% \+ 8px\);[^}]*transform: translateY\(3px\);/);
+  assert.match(styles, /\.dim-githubAction:hover \.dim-githubTooltip, \.dim-githubAction:focus-within \.dim-githubTooltip \{[^}]*opacity: 1;[^}]*visibility: visible;/);
   assert.doesNotMatch(markup, /\d+ 个渠道|dim-channelCount/);
   assert.match(markup, />微信</);
   assert.match(markup, />飞书</);
@@ -596,6 +600,7 @@ test('client registers a live bilingual locale seat for the IM settings tab', ()
       registrations[0].options.inject(),
     ));
     assert.match(markup, /Connect chatbots to DeepSeek Harness with ease/);
+    assert.match(markup, /Help &amp; feedback · Open GitHub/);
     assert.match(markup, />WeChat<|>Feishu<|>DingTalk<|>WeCom</);
     assert.match(markup, />QQ<[^]*>Slack<[^]*>Telegram<[^]*>Discord<[^]*>WhatsApp</);
     assert.doesNotMatch(markup, /[\p{Script=Han}]/u);