diff --git a/backend/routes/core_stocks.py b/backend/routes/core_stocks.py
index d92b848..b39cb7a 100644
--- a/backend/routes/core_stocks.py
+++ b/backend/routes/core_stocks.py
@@ -59,6 +59,19 @@ async def active_core_stocks():
         stocks.sort(key=lambda x: x.get("lastAppear") or "", reverse=True)
         stocks.sort(key=lambda x: -x["appearCount"])
 
+        # 一次性取窗口内全部题材关联，按 stock_code 分组（跨天题材去重）
+        themes_rows = conn.execute(
+            f"""SELECT stock_code, theme_code, theme_name FROM daily_core_stock_themes
+                WHERE trade_date IN ({placeholders})""",
+            dates,
+        ).fetchall()
+        themes_by_stock: dict[str, dict[str, dict]] = {}
+        for t in themes_rows:
+            per = themes_by_stock.setdefault(t["stock_code"], {})
+            per.setdefault(t["theme_code"], {"theme_code": t["theme_code"], "theme_name": t["theme_name"]})
+        for s in stocks:
+            s["themes"] = list(themes_by_stock.get(s["stockCode"], {}).values())
+
         # daysSinceLastAppear:最近上榜距窗口最新交易日的自然日差(简单口径)
         latest = dates[-1] if dates else None
         for s in stocks:
diff --git a/src/lib/core-stock-api.ts b/src/lib/core-stock-api.ts
index 8cbba8b..49fb647 100644
--- a/src/lib/core-stock-api.ts
+++ b/src/lib/core-stock-api.ts
@@ -9,6 +9,7 @@ export interface ActiveCoreStock {
   appearCount: number;
   lastAppear: string | null;
   daysSinceLastAppear: number; // 最近上榜距窗口最新交易日的自然日差
+  themes: { theme_code: string; theme_name: string }[]; // 所属题材列表
 }
 
 export interface ActiveCoreStocksResponse {
diff --git a/src/routes/core-stocks.tsx b/src/routes/core-stocks.tsx
index 570fc37..756af6d 100644
--- a/src/routes/core-stocks.tsx
+++ b/src/routes/core-stocks.tsx
@@ -1,7 +1,8 @@
 import { createFileRoute, Link } from "@tanstack/react-router";
 import { useQuery } from "@tanstack/react-query";
+import { Fragment, useState } from "react";
 import { fetchActiveCoreStocks } from "@/lib/core-stock-api";
-import { ArrowLeft, RefreshCw, Flame } from "lucide-react";
+import { ArrowLeft, RefreshCw, Flame, ChevronDown, ChevronRight } from "lucide-react";
 
 export const Route = createFileRoute("/core-stocks")({
   component: CoreStocksPage,
@@ -24,6 +25,7 @@ function CoreStocksPage() {
 
   const dates = data?.dates ?? [];
   const stocks = data?.stocks ?? [];
+  const [expanded, setExpanded] = useState<string | null>(null);
 
   return (
     <div className="min-h-screen bg-background">
@@ -74,35 +76,67 @@ function CoreStocksPage() {
                 </tr>
               </thead>
               <tbody>
-                {stocks.map((s) => (
-                  <tr key={s.stockCode} className="border-b last:border-0 hover:bg-muted/30">
-                    <td className="px-3 py-1.5 whitespace-nowrap">
-                      <span className="font-medium">{s.stockName}</span>
-                      <span className="ml-1 text-[10px] text-muted-foreground">{s.stockCode}</span>
-                    </td>
-                    {dates.map((d) => {
-                      const g = s.dailyGains[d];
-                      const cls = g == null ? "text-muted-foreground/40" : g >= 0 ? "text-red-500" : "text-green-500";
-                      return (
-                        <td key={d} className={`px-2 py-1.5 text-right tabular-nums whitespace-nowrap ${cls}`}>
-                          {formatGain(g)}
+                {stocks.map((s) => {
+                  const isOpen = expanded === s.stockCode;
+                  return (
+                    <Fragment key={s.stockCode}>
+                      <tr
+                        onClick={() => setExpanded(isOpen ? null : s.stockCode)}
+                        className="border-b last:border-0 hover:bg-muted/30 cursor-pointer"
+                      >
+                        <td className="px-3 py-1.5 whitespace-nowrap">
+                          <span className="inline-flex items-center gap-1">
+                            {isOpen ? <ChevronDown className="h-3.5 w-3.5 text-muted-foreground" /> : <ChevronRight className="h-3.5 w-3.5 text-muted-foreground" />}
+                            <span className="font-medium">{s.stockName}</span>
+                            <span className="ml-1 text-[10px] text-muted-foreground">{s.stockCode}</span>
+                          </span>
                         </td>
-                      );
-                    })}
-                    <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap text-muted-foreground">
-                      {s.coverCount ?? "·"}
-                    </td>
-                    <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap text-muted-foreground">
-                      {s.lastAppear ? s.lastAppear.slice(5) : "·"}
-                    </td>
-                    <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap">
-                      <span className="inline-flex items-center gap-0.5 text-orange-500">
-                        <Flame className="h-3 w-3" />
-                        {s.appearCount}
-                      </span>
-                    </td>
-                  </tr>
-                ))}
+                        {dates.map((d) => {
+                          const g = s.dailyGains[d];
+                          const cls = g == null ? "text-muted-foreground/40" : g >= 0 ? "text-red-500" : "text-green-500";
+                          return (
+                            <td key={d} className={`px-2 py-1.5 text-right tabular-nums whitespace-nowrap ${cls}`}>
+                              {formatGain(g)}
+                            </td>
+                          );
+                        })}
+                        <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap text-muted-foreground">
+                          {s.coverCount ?? "·"}
+                        </td>
+                        <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap text-muted-foreground">
+                          {s.lastAppear ? s.lastAppear.slice(5) : "·"}
+                        </td>
+                        <td className="px-2 py-1.5 text-right tabular-nums whitespace-nowrap">
+                          <span className="inline-flex items-center gap-0.5 text-orange-500">
+                            <Flame className="h-3 w-3" />
+                            {s.appearCount}
+                          </span>
+                        </td>
+                      </tr>
+                      {isOpen && (
+                        <tr className="border-b bg-muted/20">
+                          <td colSpan={dates.length + 4} className="px-3 py-2">
+                            <div className="text-[11px] text-muted-foreground mb-1">所属题材</div>
+                            {s.themes && s.themes.length > 0 ? (
+                              <div className="flex flex-wrap gap-1">
+                                {s.themes.map((t) => (
+                                  <span
+                                    key={t.theme_code}
+                                    className="px-1.5 py-0.5 rounded bg-primary/10 text-primary text-[11px]"
+                                  >
+                                    {t.theme_name}
+                                  </span>
+                                ))}
+                              </div>
+                            ) : (
+                              <span className="text-xs text-muted-foreground">暂无题材数据</span>
+                            )}
+                          </td>
+                        </tr>
+                      )}
+                    </Fragment>
+                  );
+                })}
               </tbody>
             </table>
           </div>