diff --git a/karma.conf.js b/karma.conf.js
index a54a552bb..8c1c2e24d 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -58,7 +58,7 @@ module.exports = function (config) {
             "src/core/alias.js": "coverage",
             "src/core/base.js": "coverage",
             "src/core/func/date.js": "coverage",
-            "src/base/**/*.js": "coverage"
+            "src/base/**/!(*.test).js": "coverage"
         },
 
 
diff --git a/src/core/platform/web/jquery/fn.js b/src/core/platform/web/jquery/fn.js
index 5ecf47eed..a18ad38a6 100644
--- a/src/core/platform/web/jquery/fn.js
+++ b/src/core/platform/web/jquery/fn.js
@@ -84,7 +84,9 @@ if (jQuery) {
                 py = BI.toUpperCase(py);
             }
             this.empty();
-            while (true) {
+            // BI-48487 性能: makeFirstPY出来的py中包含多音字是必要的，但虽然此方法中做了限制。但是对于一个长度为60,包含14个多音字的字符串
+            // 获取的的py长度将达到1966080, 远超过text的长度，到后面都是在做"".substring的无用功，所以此循环应保证py和textLeft长度不为0
+            while (py.length > 0 && textLeft.length > 0) {
                 var tidx = BI.toUpperCase(textLeft).indexOf(keyword);
                 var pidx = null;
                 if (py != null) {
diff --git a/src/less/lib/colors.less b/src/less/lib/colors.less
index 8dcd6281f..d48ace89e 100644
--- a/src/less/lib/colors.less
+++ b/src/less/lib/colors.less
@@ -58,6 +58,10 @@
 @color-bi-background-light-gray: @background-color-light-gray;
 //深色主题灰色背景
 @color-bi-background-light-gray-theme-dark: @background-color-light-gray-theme-dark;
+//灰色背景(中)
+@color-bi-background-medium-gray: @background-color-medium-gray;
+//深色主题灰色背景(中)
+@color-bi-background-medium-gray-theme-dark: @background-color-medium-gray-theme-dark;
 //灰化背景
 @color-bi-background-disabled: @background-color-disabled;
 //深色主题灰化背景
diff --git a/src/less/lib/constant.less b/src/less/lib/constant.less
index 221d8522a..439dbef69 100644
--- a/src/less/lib/constant.less
+++ b/src/less/lib/constant.less
@@ -62,6 +62,8 @@
 @background-color-dark: #d4dadd;
 @background-color-light-gray: #f2f4f7;
 @background-color-light-gray-theme-dark: #292f45;
+@background-color-medium-gray: #e8eaed;
+@background-color-medium-gray-theme-dark: #363e55;
 @background-color-dark-gray: #d0d4da;
 @background-color-dark-gray-theme-dark: #606479;
 @background-color-disabled: #f2f4f7;