diff --git a/public/config.json b/public/config.json
index 1c93226..acf5041 100644
--- a/public/config.json
+++ b/public/config.json
@@ -2,5 +2,6 @@
   "title": "ailog",
   "handle": "syui.ai",
   "collection": "ai.syui.log.post",
-  "network": "bsky.social"
+  "network": "bsky.social",
+  "color": "#0066cc"
 }
diff --git a/src/components/atbrowser.ts b/src/components/atbrowser.ts
index c950e1e..1502140 100644
--- a/src/components/atbrowser.ts
+++ b/src/components/atbrowser.ts
@@ -23,24 +23,69 @@ function escapeHtml(str: string): string {
     .replace(/"/g, '"')
 }
 
-async function renderCollections(did: string, handle: string): Promise<string> {
+async function renderServices(did: string, handle: string): Promise<string> {
   const collections = await describeRepo(did)
 
   if (collections.length === 0) {
     return '<p class="no-data">No collections found</p>'
   }
 
-  const items = collections.map(col => {
-    const service = getServiceInfo(col)
-    const favicon = service ? `<img src="${service.favicon}" class="collection-favicon" alt="" onerror="this.style.display='none'">` : ''
-    const serviceName = service ? `<span class="collection-service">${service.name}</span>` : ''
+  // Group by service domain
+  const serviceMap = new Map<string, { name: string; favicon: string; count: number }>()
 
+  for (const col of collections) {
+    const info = getServiceInfo(col)
+    if (info) {
+      const key = info.domain
+      if (!serviceMap.has(key)) {
+        serviceMap.set(key, { name: info.name, favicon: info.favicon, count: 0 })
+      }
+      serviceMap.get(key)!.count++
+    }
+  }
+
+  const items = Array.from(serviceMap.entries()).map(([domain, info]) => {
+    return `
+      <li class="service-list-item">
+        <a href="?mode=browser&handle=${handle}&service=${encodeURIComponent(domain)}" class="service-list-link">
+          <img src="${info.favicon}" class="service-list-favicon" alt="" onerror="this.style.display='none'">
+          <span class="service-list-name">${info.name}</span>
+          <span class="service-list-count">${info.count}</span>
+        </a>
+      </li>
+    `
+  }).join('')
+
+  return `
+    <div class="services-list">
+      <h3>Services</h3>
+      <ul class="service-list">${items}</ul>
+    </div>
+  `
+}
+
+async function renderCollections(did: string, handle: string, serviceDomain: string): Promise<string> {
+  const collections = await describeRepo(did)
+
+  // Filter by service domain
+  const filtered = collections.filter(col => {
+    const info = getServiceInfo(col)
+    return info && info.domain === serviceDomain
+  })
+
+  if (filtered.length === 0) {
+    return '<p class="no-data">No collections found</p>'
+  }
+
+  // Get favicon from first collection
+  const firstInfo = getServiceInfo(filtered[0])
+  const favicon = firstInfo ? `<img src="${firstInfo.favicon}" class="collection-header-favicon" alt="" onerror="this.style.display='none'">` : ''
+
+  const items = filtered.map(col => {
     return `
       <li class="collection-item">
         <a href="?mode=browser&handle=${handle}&collection=${encodeURIComponent(col)}" class="collection-link">
-          ${favicon}
           <span class="collection-nsid">${col}</span>
-          ${serviceName}
         </a>
       </li>
     `
@@ -48,7 +93,7 @@ async function renderCollections(did: string, handle: string): Promise<string> {
 
   return `
     <div class="collections">
-      <h3>Collections</h3>
+      <h3 class="collection-header">${favicon}<span>${serviceDomain}</span></h3>
       <ul class="collection-list">${items}</ul>
     </div>
   `
@@ -120,6 +165,7 @@ export async function mountAtBrowser(
   handle: string,
   collection: string | null,
   rkey: string | null,
+  service: string | null = null,
   loginDid: string | null = null
 ): Promise<void> {
   container.innerHTML = '<p class="loading">Loading...</p>'
@@ -135,10 +181,16 @@ export async function mountAtBrowser(
       nav = `<a href="?mode=browser&handle=${handle}&collection=${encodeURIComponent(collection)}" class="back-link">← Back</a>`
       content = await renderRecordDetail(did, handle, collection, rkey, canDelete)
     } else if (collection) {
-      nav = `<a href="?mode=browser&handle=${handle}" class="back-link">← Collections</a>`
+      // Get service from collection for back link
+      const info = getServiceInfo(collection)
+      const backService = info ? info.domain : ''
+      nav = `<a href="?mode=browser&handle=${handle}&service=${encodeURIComponent(backService)}" class="back-link">← ${info?.name || 'Back'}</a>`
       content = await renderRecordList(did, handle, collection)
+    } else if (service) {
+      nav = `<a href="?mode=browser&handle=${handle}" class="back-link">← Services</a>`
+      content = await renderCollections(did, handle, service)
     } else {
-      content = await renderCollections(did, handle)
+      content = await renderServices(did, handle)
     }
 
     container.innerHTML = nav + content
diff --git a/src/components/services.ts b/src/components/services.ts
new file mode 100644
index 0000000..0086ae2
--- /dev/null
+++ b/src/components/services.ts
@@ -0,0 +1,42 @@
+import { describeRepo, getServiceInfo, resolveHandle } from '../lib/api.js'
+
+export async function renderServices(handle: string): Promise<string> {
+  const did = handle.startsWith('did:') ? handle : await resolveHandle(handle)
+  const collections = await describeRepo(did)
+
+  if (collections.length === 0) {
+    return ''
+  }
+
+  // Group by service
+  const serviceMap = new Map<string, { name: string; favicon: string; collections: string[] }>()
+
+  for (const col of collections) {
+    const info = getServiceInfo(col)
+    if (info) {
+      const key = info.domain
+      if (!serviceMap.has(key)) {
+        serviceMap.set(key, { name: info.name, favicon: info.favicon, collections: [] })
+      }
+      serviceMap.get(key)!.collections.push(col)
+    }
+  }
+
+  const items = Array.from(serviceMap.entries()).map(([domain, info]) => {
+    const url = `?mode=browser&handle=${handle}&service=${encodeURIComponent(domain)}`
+
+    return `
+      <a href="${url}" class="service-item" title="${info.collections.join(', ')}">
+        <img src="${info.favicon}" class="service-favicon" alt="" onerror="this.style.display='none'">
+        <span class="service-name">${info.name}</span>
+      </a>
+    `
+  }).join('')
+
+  return `<div class="services">${items}</div>`
+}
+
+export async function mountServices(container: HTMLElement, handle: string): Promise<void> {
+  const html = await renderServices(handle)
+  container.innerHTML = html
+}
diff --git a/src/lib/api.ts b/src/lib/api.ts
index c7bda89..c59f2a3 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -178,16 +178,16 @@ export async function fetchLexicon(nsid: string): Promise<any | null> {
 }
 
 // Known service mappings for collections
-const SERVICE_MAP: Record<string, { name: string; domain: string; icon?: string }> = {
-  'app.bsky': { name: 'Bluesky', domain: 'bsky.app', icon: 'https://bsky.app/static/favicon-32x32.png' },
-  'ai.syui': { name: 'syui.ai', domain: 'syui.ai' },
-  'com.whtwnd': { name: 'WhiteWind', domain: 'whtwnd.com' },
-  'fyi.unravel.frontpage': { name: 'Frontpage', domain: 'frontpage.fyi' },
-  'com.shinolabs.pinksea': { name: 'PinkSea', domain: 'pinksea.art' },
-  'blue.linkat': { name: 'Linkat', domain: 'linkat.blue' },
-  'sh.tangled': { name: 'Tangled', domain: 'tangled.sh' },
-  'pub.leaflet': { name: 'Leaflet', domain: 'leaflet.pub' },
-  'chat.bsky': { name: 'Bluesky Chat', domain: 'bsky.app' },
+const SERVICE_MAP: Record<string, { domain: string; icon?: string }> = {
+  'app.bsky': { domain: 'bsky.app', icon: 'https://bsky.app/static/favicon-32x32.png' },
+  'chat.bsky': { domain: 'bsky.app', icon: 'https://bsky.app/static/favicon-32x32.png' },
+  'ai.syui': { domain: 'syui.ai' },
+  'com.whtwnd': { domain: 'whtwnd.com' },
+  'fyi.unravel.frontpage': { domain: 'frontpage.fyi' },
+  'com.shinolabs.pinksea': { domain: 'pinksea.art' },
+  'blue.linkat': { domain: 'linkat.blue' },
+  'sh.tangled': { domain: 'tangled.sh' },
+  'pub.leaflet': { domain: 'leaflet.pub' },
 }
 
 export function getServiceInfo(collection: string): { name: string; domain: string; favicon: string } | null {
@@ -195,7 +195,7 @@ export function getServiceInfo(collection: string): { name: string; domain: stri
   for (const [prefix, info] of Object.entries(SERVICE_MAP)) {
     if (collection.startsWith(prefix)) {
       return {
-        name: info.name,
+        name: info.domain,
         domain: info.domain,
         favicon: info.icon || `https://www.google.com/s2/favicons?domain=${info.domain}&sz=32`
       }
diff --git a/src/main.ts b/src/main.ts
index 743f23a..87856fb 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,4 +1,5 @@
 import { getProfile, listRecords, getRecord, setNetworkConfig } from './lib/api.js'
+import { renderServices } from './components/services.js'
 import { login, logout, restoreSession, handleOAuthCallback, setAuthNetworkConfig, type AuthSession } from './lib/auth.js'
 import { mountProfile } from './components/profile.js'
 import { mountPostList, mountPostDetail } from './components/posts.js'
@@ -52,6 +53,11 @@ async function init(): Promise<void> {
   // Set page title
   document.title = config.title || 'ailog'
 
+  // Set theme color
+  if (config.color) {
+    document.documentElement.style.setProperty('--btn-color', config.color)
+  }
+
   // Set network config
   const networkConfig = networks[config.network]
   if (networkConfig) {
@@ -72,6 +78,7 @@ async function init(): Promise<void> {
   const mode = params.get('mode')
   const rkey = params.get('rkey')
   const collection = params.get('collection')
+  const service = params.get('service')
   const handle = params.get('handle') || config.handle
 
   const profileEl = document.getElementById('profile')
@@ -126,7 +133,7 @@ async function init(): Promise<void> {
   if (mode === 'browser') {
     profileEl.innerHTML = renderTabs(handle, mode, isLoggedIn)
     const loginDid = authSession?.did || null
-    await mountAtBrowser(contentEl, handle, collection, rkey, loginDid)
+    await mountAtBrowser(contentEl, handle, collection, rkey, service, loginDid)
     return
   }
 
@@ -139,6 +146,10 @@ async function init(): Promise<void> {
     profileEl.appendChild(profileContentEl)
     mountProfile(profileContentEl, profile)
 
+    // Add services
+    const servicesHtml = await renderServices(handle)
+    profileContentEl.insertAdjacentHTML('beforeend', servicesHtml)
+
     if (rkey) {
       const post = await getRecord(profile.did, config.collection, rkey)
       if (post) {
diff --git a/src/styles/main.css b/src/styles/main.css
index 311e1d1..cd059fe 100644
--- a/src/styles/main.css
+++ b/src/styles/main.css
@@ -1,3 +1,7 @@
+:root {
+  --btn-color: #0066cc;
+}
+
 * {
   box-sizing: border-box;
   margin: 0;
@@ -26,6 +30,16 @@ body {
   .profile {
     background: #1a1a1a;
   }
+  .services {
+    border-color: #333;
+  }
+  .service-item {
+    background: #2a2a2a;
+    color: #e0e0e0;
+  }
+  .service-item:hover {
+    background: #333;
+  }
   .post-item {
     border-color: #333;
   }
@@ -78,9 +92,9 @@ body {
 }
 
 .header-btn.at-btn {
-  background: #0066cc;
+  background: var(--btn-color);
   color: #fff;
-  border-color: #0066cc;
+  border-color: var(--btn-color);
 }
 
 .header-btn.at-btn:hover {
@@ -92,9 +106,9 @@ body {
 }
 
 .header-btn.user-btn {
-  background: #0066cc;
+  background: var(--btn-color);
   color: #fff;
-  border-color: #0066cc;
+  border-color: var(--btn-color);
 }
 
 /* Post Form */
@@ -144,7 +158,7 @@ body {
 
 .post-form-btn {
   padding: 10px 24px;
-  background: #0066cc;
+  background: var(--btn-color);
   color: #fff;
   border: none;
   border-radius: 6px;
@@ -211,6 +225,42 @@ body {
   color: #444;
 }
 
+/* Services */
+.services {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid #eee;
+}
+
+.service-item {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 6px 12px;
+  background: #f5f5f5;
+  border-radius: 20px;
+  text-decoration: none;
+  color: #333;
+  font-size: 13px;
+  transition: background 0.2s;
+}
+
+.service-item:hover {
+  background: #e8e8e8;
+}
+
+.service-favicon {
+  width: 16px;
+  height: 16px;
+}
+
+.service-name {
+  font-weight: 500;
+}
+
 /* Post List */
 .post-list {
   list-style: none;
@@ -392,7 +442,7 @@ body {
 }
 
 .back-link {
-  color: #0066cc;
+  color: var(--btn-color);
   text-decoration: none;
 }
 
@@ -448,17 +498,19 @@ body {
 }
 
 .tab.active {
-  background: #0066cc;
+  background: var(--btn-color);
   color: #fff;
 }
 
 /* AT Browser */
+.services-list,
 .collections,
 .records,
 .record-detail {
   padding: 16px 0;
 }
 
+.services-list h3,
 .collections h3,
 .records h3,
 .record-detail h3 {
@@ -466,6 +518,53 @@ body {
   margin-bottom: 12px;
 }
 
+.service-list {
+  list-style: none;
+}
+
+.service-list-item {
+  border-bottom: 1px solid #eee;
+}
+
+.service-list-link {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 8px;
+  text-decoration: none;
+  color: inherit;
+}
+
+.service-list-link:hover {
+  background: #f9f9f9;
+}
+
+.service-list-favicon {
+  width: 24px;
+  height: 24px;
+}
+
+.service-list-name {
+  flex: 1;
+  font-weight: 500;
+}
+
+.service-list-count {
+  font-size: 13px;
+  color: #888;
+}
+
+.collection-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.collection-header-favicon {
+  width: 24px;
+  height: 24px;
+}
+
 .collection-list,
 .record-list {
   list-style: none;
@@ -515,7 +614,7 @@ body {
 }
 
 .record-rkey {
-  color: #0066cc;
+  color: var(--btn-color);
   min-width: 120px;
 }
 
@@ -622,8 +721,8 @@ body {
   }
   .header-btn.at-btn,
   .header-btn.user-btn {
-    background: #0066cc;
-    border-color: #0066cc;
+    background: var(--btn-color);
+    border-color: var(--btn-color);
     color: #fff;
   }
   .post-form-title,
@@ -650,12 +749,14 @@ body {
     background: #333;
   }
   .tab.active {
-    background: #0066cc;
+    background: var(--btn-color);
   }
+  .service-list-link:hover,
   .collection-link:hover,
   .record-link:hover {
     background: #1a1a1a;
   }
+  .service-list-item,
   .collection-item,
   .record-item,
   .record-header {
diff --git a/src/types.ts b/src/types.ts
index 75a8975..578ad7a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -25,6 +25,7 @@ export interface AppConfig {
   handle: string
   collection: string
   network: string
+  color?: string
 }
 
 export type Networks = Record<string, NetworkConfig>