diff --git a/src/scene/CesiumGlobe.js b/src/scene/CesiumGlobe.js
index c800041..9c99b53 100644
--- a/src/scene/CesiumGlobe.js
+++ b/src/scene/CesiumGlobe.js
@@ -10,6 +10,10 @@ const TERRAIN_URL =
 // 点击标记后飞到的目标高度（米，与初始视图一致，保证左键拖拽始终是“整球旋转”）
 const FLY_TO_HEIGHT = 7.2e6;
 
+// 标记便签的离地高度（米）：抬到高空，使其 bounding 球比城市/国家名更靠相机，
+// 从而在透明通道的深度排序中始终后绘制（盖在标签上层）。
+const MARKER_ALTITUDE = 50000;
+
 // 计算多边形集合的球面面积（km²），用于按国土面积分级国家名字号
 function sphericalAreaKm2(polys) {
   let area = 0;
@@ -242,14 +246,13 @@ export class CesiumGlobe {
       const noteSelected = makeStickyNote(entry.name, 19, true);
 
       const entity = viewer.entities.add({
-        position: Cesium.Cartesian3.fromDegrees(entry.lng, entry.lat),
+        position: Cesium.Cartesian3.fromDegrees(entry.lng, entry.lat, MARKER_ALTITUDE),
         billboard: {
           image: noteNormal.canvas,
           scale: noteNormal.scale,
           horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
           verticalOrigin: Cesium.VerticalOrigin.CENTER,
           pixelOffset: new Cesium.Cartesian2(0, 0),
-          heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
           disableDepthTestDistance: Number.POSITIVE_INFINITY,
           distanceDisplayCondition: new Cesium.DistanceDisplayCondition(0, 1e7),
         },