diff --git a/src/Global/efflect/Sunshine/index.js b/src/Global/efflect/Sunshine/index.js
index 4e37fee..f1b1a59 100644
--- a/src/Global/efflect/Sunshine/index.js
+++ b/src/Global/efflect/Sunshine/index.js
@@ -52,6 +52,14 @@ export default class Sunshine {
     that.viewer.clock.currentTime = Cesium.JulianDate.fromDate(now);
     that.viewer.clock.multiplier = that.options.speed;
     that.viewer.shadowMap.softShadows = that.options.softShadow;
+    that.viewer.shadowMap.cascadesEnabled = true
+    that.viewer.shadowMap.size = 2048;
+    that.viewer.shadowMap.numberOfCascades = 4;   // 增加级联层数（默认3层）
+    that.viewer.shadowMap.maximumDistance = 5000; // 扩大阴影渲染距离
+    const lightCamera = that.viewer.shadowMap._lightCamera;
+    lightCamera.frustum.near = 0.1;    // 缩小近平面距离
+    lightCamera.frustum.far = 10000;   // 扩大远平面距离
+    that.viewer.shadowMap.normalOffset = true; // 避免深度冲突导致的阴影闪烁
 
     that.edit(true)
   }
@@ -218,6 +226,12 @@ export default class Sunshine {
     this.entity = null
     this.timeLine.clear()
 
+    this.viewer.shadowMap.cascadesEnabled = false
+    this.viewer.shadowMap.size = 1024;
+    this.viewer.shadowMap.numberOfCascades = 3;   // 增加级联层数（默认3层）
+    const lightCamera = this.viewer.shadowMap._lightCamera;
+    this.viewer.shadowMap.normalOffset = false; // 避免深度冲突导致的阴影闪烁
+
     if (this._DialogObject && !this._DialogObject.isDestroy) {
       this._DialogObject.close()
       this._DialogObject = null
diff --git a/src/Global/efflect/Sunshine/timeLIne.js b/src/Global/efflect/Sunshine/timeLIne.js
index 082a999..c7dfa3f 100644
--- a/src/Global/efflect/Sunshine/timeLIne.js
+++ b/src/Global/efflect/Sunshine/timeLIne.js
@@ -33,7 +33,9 @@ export default class TimeLine {
     that.startTime = Date.now() - ((that.manualPosition || 0) * 86400 * 1000 / that.speed);
 
     that.timeline.addEventListener('mousedown', (e) => {
-      that.isDragging = true;
+      if (e.srcElement.className === 'handle') {
+        that.isDragging = true;
+      }
       e.preventDefault();
     });