diff --git a/web/app.py b/web/app.py
index 915a309..6efca6d 100644
--- a/web/app.py
+++ b/web/app.py
@@ -289,6 +289,22 @@ def paper_public(paper: dict[str, Any]) -> dict[str, Any]:
     return {key: value for key, value in paper.items() if not key.startswith("_") and key != "meta"}
 
 
+def paper_card(paper: dict[str, Any]) -> dict[str, Any]:
+    return {
+        "id": paper["id"],
+        "title": paper["title"],
+        "year": paper["year"],
+        "venue": paper["venue"],
+        "url": paper["url"],
+        "source": paper["source"],
+        "published_at": paper["published_at"],
+        "status": paper["status"],
+        "relevance": paper["relevance"],
+        "topics": paper["topics"],
+        "collection_score": paper["collection_score"],
+    }
+
+
 def topic_counts(papers: list[dict[str, Any]]) -> list[dict[str, Any]]:
     counts: dict[str, int] = {}
     for paper in papers:
@@ -321,7 +337,7 @@ def top_papers_for(papers: list[dict[str, Any]], limit: int = 8, recent: bool =
         ranked.sort(key=lambda item: (item["published_at"], item["collection_score"]), reverse=True)
     else:
         ranked.sort(key=lambda item: (item["collection_score"], item["published_at"]), reverse=True)
-    return [paper_public(paper) for paper in ranked[:limit]]
+    return [paper_card(paper) for paper in ranked[:limit]]
 
 
 def build_atlas() -> dict[str, Any]:
@@ -377,7 +393,6 @@ def build_atlas() -> dict[str, Any]:
                 "y": y,
                 "stance": profile["stance"],
                 "question": profile["question"],
-                "key_papers": top_papers_for(topic_papers, 5),
             }
         )
 
@@ -471,7 +486,7 @@ def topic_focus(topic: str) -> dict[str, Any]:
         "routes": routes,
         "key_papers": top_papers_for(topic_papers, 12),
         "recent_papers": top_papers_for(topic_papers, 12, recent=True),
-        "evidence": top_papers_for(topic_papers, 40),
+        "evidence": top_papers_for(topic_papers, 24),
         "reading_lens": [
             "先看主题问题，再看高分论文，不要从论文列表开始迷路。",
             "优先对比相邻主题，它们通常代表真实系统里的交叉问题。",