diff --git a/src/components/Archive.astro b/src/components/Archive.astro
index 2f074d0..0a8a58e 100644
--- a/src/components/Archive.astro
+++ b/src/components/Archive.astro
@@ -7,11 +7,21 @@ interface Props {
   lang?: 'en' | 'zh';
   /** Filter bar + chips. Off on tag/collection pages, where the set is already narrow. */
   chrome?: boolean;
+  /**
+   * Posts the tag-chip strip is built from. Defaults to `posts`, which is right on
+   * the archive; a tag page passes the whole language collection so its strip is the
+   * same site-wide topic menu as /posts/ (the chips navigate, so their counts must be
+   * site-wide or they would lie). Category chips and the row filter stay scoped to
+   * `posts`, so their counts always match the rows actually on the page.
+   */
+  chipPosts?: CollectionEntry<'posts'>[];
+  /** On a tag page, the tag being viewed — its chip is marked active instead of looking clickable-to-self. */
+  activeTag?: string;
 }
-const { posts, lang = 'en', chrome = true } = Astro.props;
+const { posts, lang = 'en', chrome = true, chipPosts = posts, activeTag } = Astro.props;
 const isZh = lang === 'zh';
 
-const counts = tagCounts(posts);
+const counts = tagCounts(chipPosts);
 const years = [...new Set(posts.map((p) => p.data.pubDate.getUTCFullYear()))].sort((a, b) => b - a);
 const categories = [...new Set(posts.map((p) => p.data.category))]
   .map((c) => ({ name: c, n: posts.filter((p) => p.data.category === c).length }))
@@ -56,7 +66,11 @@ const labels = isZh
 
 <div class="archive-chips archive-tags" role="group" aria-label={isZh ? '按标签筛选' : 'Filter by tag'}>
   {chips.map((c) => (
-    <a class="chip tag-chip" href={tagHref(c.tag, lang)}>{c.tag} <span>{c.n}</span></a>
+    <a
+      class:list={['chip', 'tag-chip', { 'is-active': c.tag === activeTag }]}
+      href={tagHref(c.tag, lang)}
+      aria-current={c.tag === activeTag ? 'page' : undefined}
+    >{c.tag} <span>{c.n}</span></a>
   ))}
 </div>
   </>
diff --git a/src/pages/tags/[tag].astro b/src/pages/tags/[tag].astro
index 4e18d02..70bebec 100644
--- a/src/pages/tags/[tag].astro
+++ b/src/pages/tags/[tag].astro
@@ -16,11 +16,16 @@ export async function getStaticPaths() {
   const counts = tagCounts(posts);
   return tagPageNames(posts).map((tag) => ({
     params: { tag },
-    props: { tag, n: counts.get(tag) ?? 0, posts: posts.filter((p) => p.data.tags.includes(tag)) },
+    props: {
+      tag,
+      n: counts.get(tag) ?? 0,
+      posts: posts.filter((p) => p.data.tags.includes(tag)),
+      all: posts,
+    },
   }));
 }
 
-const { tag, posts } = Astro.props as { tag: string; posts: any[] };
+const { tag, posts, all } = Astro.props as { tag: string; posts: any[]; all: any[] };
 ---
 
 <BaseLayout
@@ -36,5 +41,8 @@ const { tag, posts } = Astro.props as { tag: string; posts: any[] };
     <span class="sep">·</span>
     <a href="/categories/">Categories</a>
   </p>
-  <Archive posts={posts} lang="en" chrome={false} />
+  {/* Same filter bar and topic chips as /posts/ — a tag page that hides them makes
+      the reader go back up to the archive to filter anything. `chipPosts` is the whole
+      language collection so the tag strip keeps site-wide counts. */}
+  <Archive posts={posts} chipPosts={all} activeTag={tag} lang="en" />
 </BaseLayout>
diff --git a/src/pages/zh/tags/[tag].astro b/src/pages/zh/tags/[tag].astro
index 016c552..6585fd4 100644
--- a/src/pages/zh/tags/[tag].astro
+++ b/src/pages/zh/tags/[tag].astro
@@ -14,11 +14,16 @@ export async function getStaticPaths() {
   const counts = tagCounts(posts);
   return tagPageNames(posts).map((tag) => ({
     params: { tag },
-    props: { tag, n: counts.get(tag) ?? 0, posts: posts.filter((p) => p.data.tags.includes(tag)) },
+    props: {
+      tag,
+      n: counts.get(tag) ?? 0,
+      posts: posts.filter((p) => p.data.tags.includes(tag)),
+      all: posts,
+    },
   }));
 }
 
-const { tag, posts } = Astro.props as { tag: string; posts: any[] };
+const { tag, posts, all } = Astro.props as { tag: string; posts: any[]; all: any[] };
 ---
 
 <BaseLayout
@@ -35,5 +40,6 @@ const { tag, posts } = Astro.props as { tag: string; posts: any[] };
     <span class="sep">·</span>
     <a href="/zh/categories/">分类</a>
   </p>
-  <Archive posts={posts} lang="zh" chrome={false} />
+  {/* 与 /zh/posts/ 相同的筛选栏与主题标签条；chipPosts 传全站集合，标签条的计数才是全站数。 */}
+  <Archive posts={posts} chipPosts={all} activeTag={tag} lang="zh" />
 </BaseLayout>