diff --git a/components/firstui/fui-date-picker/fui-date-picker.vue b/components/firstui/fui-date-picker/fui-date-picker.vue
index adfabcc..7dd22c1 100644
--- a/components/firstui/fui-date-picker/fui-date-picker.vue
+++ b/components/firstui/fui-date-picker/fui-date-picker.vue
@@ -460,10 +460,10 @@ export default {
 			return `background:${this.maskBackground};z-index:${Number(this.zIndex - 10)};`
 		},
 		topBottom() {
-			if (top || Number(top) ===0)
-				return `top:${this.top}rpx;zIndex: ${Number(this.zIndex)}`
+			if (this.top || Number(this.top) ===0)
+				return `top:${this.top}rpx;z-index: ${Number(this.zIndex)}`
 			else
-				return `zIndex: ${Number(this.zIndex)}`
+				return `z-index: ${Number(this.zIndex)}`
 			
 		},
 		initChange() {