diff --git a/src/scene/CesiumGlobe.js b/src/scene/CesiumGlobe.js
index a19c75b..15ff13c 100644
--- a/src/scene/CesiumGlobe.js
+++ b/src/scene/CesiumGlobe.js
@@ -77,8 +77,11 @@ function makeStickyNote(text, fontSize, selected = false) {
   // 箭头 + 圆角矩形一体化路径（箭头尖端在 (ox, oy + h/2)，指向坐标）
   ctx.beginPath();
   ctx.moveTo(ox, oy + h / 2);
-  ctx.lineTo(ox + arrowW, oy + h / 2 - arrowH / 2);
-  ctx.lineTo(ox + arrowW, oy + radius);
+  // 上侧：平滑曲线从尖端连到左上角
+  ctx.quadraticCurveTo(
+    ox + arrowW * 0.7, oy + h / 2 - arrowH / 2,
+    ox + arrowW, oy + radius,
+  );
   ctx.arcTo(ox + arrowW, oy, ox + arrowW + radius, oy, radius);
   ctx.lineTo(ox + w - radius, oy);
   ctx.arcTo(ox + w, oy, ox + w, oy + radius, radius);
@@ -86,7 +89,11 @@ function makeStickyNote(text, fontSize, selected = false) {
   ctx.arcTo(ox + w, oy + h, ox + w - radius, oy + h, radius);
   ctx.lineTo(ox + arrowW + radius, oy + h);
   ctx.arcTo(ox + arrowW, oy + h, ox + arrowW, oy + h - radius, radius);
-  ctx.lineTo(ox + arrowW, oy + h / 2 + arrowH / 2);
+  // 下侧：平滑曲线从下边缘连回尖端
+  ctx.quadraticCurveTo(
+    ox + arrowW * 0.7, oy + h / 2 + arrowH / 2,
+    ox, oy + h / 2,
+  );
   ctx.closePath();
 
   if (selected) {