改一下bubblecombo

bi/base.css

@@ -33,6 +33,7 @@
 /****** common color(常用颜色,可用于普遍场景) *****/
 /**** custom color(自定义颜色,用于特定场景) ****/
 .bi-bubble-combo .bubble-combo-triangle-left {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -40,6 +41,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-right {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -47,6 +49,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-top {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;
@@ -54,6 +57,7 @@
   border-top: 6px solid #3f8ce8;
 }
 .bi-bubble-combo .bubble-combo-triangle-bottom {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;

docs/base.css

@@ -33,6 +33,7 @@
 /****** common color(常用颜色,可用于普遍场景) *****/
 /**** custom color(自定义颜色,用于特定场景) ****/
 .bi-bubble-combo .bubble-combo-triangle-left {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -40,6 +41,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-right {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -47,6 +49,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-top {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;
@@ -54,6 +57,7 @@
   border-top: 6px solid #3f8ce8;
 }
 .bi-bubble-combo .bubble-combo-triangle-bottom {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;

src/css/base/combo/combo.bubble.css

@@ -2,6 +2,7 @@
 /****** common color(常用颜色,可用于普遍场景) *****/
 /**** custom color(自定义颜色,用于特定场景) ****/
 .bi-bubble-combo .bubble-combo-triangle-left {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -9,6 +10,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-right {
+  z-index: 1;
   width: 0;
   height: 0;
   border-top: 6px solid transparent;
@@ -16,6 +18,7 @@
   border-bottom: 6px solid transparent;
 }
 .bi-bubble-combo .bubble-combo-triangle-top {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;
@@ -23,6 +26,7 @@
   border-top: 6px solid #3f8ce8;
 }
 .bi-bubble-combo .bubble-combo-triangle-bottom {
+  z-index: 1;
   width: 0;
   height: 0;
   border-left: 6px solid transparent;

src/less/base/combo/combo.bubble.less

@@ -2,15 +2,19 @@
 
 .bi-bubble-combo {
   & .bubble-combo-triangle-left {
+    z-index: 1;
     .solid-triangle-right(@color-bi-background-highlight);
   }
   & .bubble-combo-triangle-right {
+    z-index: 1;
     .solid-triangle-left(@color-bi-background-highlight);
   }
   & .bubble-combo-triangle-top {
+    z-index: 1;
     .solid-triangle-down(@color-bi-background-highlight);
   }
   & .bubble-combo-triangle-bottom {
+    z-index: 1;
     .solid-triangle-up(@color-bi-background-highlight);
   }
 }