diff --git a/src/routes/hot-map.tsx b/src/routes/hot-map.tsx
index c6dcabe..c75000b 100644
--- a/src/routes/hot-map.tsx
+++ b/src/routes/hot-map.tsx
@@ -815,9 +815,9 @@ function HotMapGraph({ graph }: { graph: ThemeGraph }) {
       )
       .force("charge", forceManyBody<SimNode>().strength((d) => (d.type === "theme" ? -650 : -35)))
       .force("center", forceCenter(size.w / 2, size.h / 2))
-      // 题材节点留出标签高度防文字重叠（标签在节点下方）
+      // 题材节点留出标签高度防文字重叠（标签在节点下方）；股票节点留 6px 最小间隔
       .force("collide", forceCollide<SimNode>().radius((d) =>
-        d.type === "theme" ? d.radius + (isCoarse ? 20 : 16) : d.radius + 4,
+        d.type === "theme" ? d.radius + (isCoarse ? 20 : 16) : d.radius + 6,
       ));
 
     simRunningRef.current = true;