修改

src/main/resources/static/police/css/index.css

@@ -1404,7 +1404,7 @@ body{
     width:calc(100vw / 1440 * 60) !important;
     height: calc(100vw / 1440 * 60) !important;
     left:0px !important;
-    background: url("../images/cbs/btn_left_light.svg") no-repeat center;
+    background: url("../images/cbs/btn_left_black.svg") no-repeat center;
 }
 .swiper-button-prev:after{
     content: '' !important;