diff --git a/components/form/__tests__/__snapshots__/demo.test.js.snap b/components/form/__tests__/__snapshots__/demo.test.js.snap
index 7f2597d3e2..47f429868b 100644
--- a/components/form/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/form/__tests__/__snapshots__/demo.test.js.snap
@@ -2503,7 +2503,7 @@ exports[`renders ./components/form/demo/validate-other.md correctly 1`] = `
             />
             <div
               class="ant-slider-track"
-              style="visibility:visible;left:0%;width:0%"
+              style="left:0%;width:0%"
             />
             <div
               class="ant-slider-step"
diff --git a/components/grid/__tests__/__snapshots__/demo.test.js.snap b/components/grid/__tests__/__snapshots__/demo.test.js.snap
index 1e7582712c..8c2c86ea52 100644
--- a/components/grid/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/grid/__tests__/__snapshots__/demo.test.js.snap
@@ -480,7 +480,7 @@ exports[`renders ./components/grid/demo/playground.md correctly 1`] = `
         />
         <div
           class="ant-slider-track"
-          style="visibility:visible;left:0%;width:20%"
+          style="left:0%;width:20%"
         />
         <div
           class="ant-slider-step"
@@ -578,7 +578,7 @@ exports[`renders ./components/grid/demo/playground.md correctly 1`] = `
         />
         <div
           class="ant-slider-track"
-          style="visibility:visible;left:0%;width:40%"
+          style="left:0%;width:40%"
         />
         <div
           class="ant-slider-step"
diff --git a/components/select/style/index.less b/components/select/style/index.less
index 28d2e45ebf..aeb491213c 100644
--- a/components/select/style/index.less
+++ b/components/select/style/index.less
@@ -489,6 +489,14 @@
         background-color: @item-hover-bg;
       }
 
+      &:first-child {
+        border-radius: @border-radius-base @border-radius-base 0 0;
+      }
+
+      &:last-child {
+        border-radius: 0 0 @border-radius-base @border-radius-base;
+      }
+
       &-disabled {
         color: @disabled-color;
         cursor: not-allowed;
diff --git a/components/slider/__tests__/__snapshots__/demo.test.js.snap b/components/slider/__tests__/__snapshots__/demo.test.js.snap
index 20db817c93..5c23e17842 100644
--- a/components/slider/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/slider/__tests__/__snapshots__/demo.test.js.snap
@@ -10,7 +10,7 @@ exports[`renders ./components/slider/demo/basic.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:30%"
+      style="left:0%;width:30%"
     />
     <div
       class="ant-slider-step"
@@ -37,7 +37,7 @@ exports[`renders ./components/slider/demo/basic.md correctly 1`] = `
     />
     <div
       class="ant-slider-track ant-slider-track-1"
-      style="visibility:visible;left:20%;width:30%"
+      style="left:20%;width:30%"
     />
     <div
       class="ant-slider-step"
@@ -88,7 +88,7 @@ exports[`renders ./components/slider/demo/event.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:30%"
+      style="left:0%;width:30%"
     />
     <div
       class="ant-slider-step"
@@ -115,7 +115,7 @@ exports[`renders ./components/slider/demo/event.md correctly 1`] = `
     />
     <div
       class="ant-slider-track ant-slider-track-1"
-      style="visibility:visible;left:20%;width:30%"
+      style="left:20%;width:30%"
     />
     <div
       class="ant-slider-step"
@@ -163,7 +163,7 @@ exports[`renders ./components/slider/demo/icon-slider.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:0%"
+      style="left:0%;width:0%"
     />
     <div
       class="ant-slider-step"
@@ -205,7 +205,7 @@ exports[`renders ./components/slider/demo/input-number.md correctly 1`] = `
         />
         <div
           class="ant-slider-track"
-          style="visibility:visible;left:0%;width:0%"
+          style="left:0%;width:0%"
         />
         <div
           class="ant-slider-step"
@@ -293,7 +293,7 @@ exports[`renders ./components/slider/demo/input-number.md correctly 1`] = `
         />
         <div
           class="ant-slider-track"
-          style="visibility:visible;left:0%;width:0%"
+          style="left:0%;width:0%"
         />
         <div
           class="ant-slider-step"
@@ -383,7 +383,7 @@ exports[`renders ./components/slider/demo/mark.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:37%"
+      style="left:0%;width:37%"
     />
     <div
       class="ant-slider-step"
@@ -454,7 +454,7 @@ exports[`renders ./components/slider/demo/mark.md correctly 1`] = `
     />
     <div
       class="ant-slider-track ant-slider-track-1"
-      style="visibility:visible;left:26%;width:11%"
+      style="left:26%;width:11%"
     />
     <div
       class="ant-slider-step"
@@ -536,10 +536,6 @@ exports[`renders ./components/slider/demo/mark.md correctly 1`] = `
     <div
       class="ant-slider-rail"
     />
-    <div
-      class="ant-slider-track"
-      style="visibility:hidden;left:0%;width:37%"
-    />
     <div
       class="ant-slider-step"
     >
@@ -612,7 +608,7 @@ exports[`renders ./components/slider/demo/mark.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:37%"
+      style="left:0%;width:37%"
     />
     <div
       class="ant-slider-step"
@@ -686,7 +682,7 @@ exports[`renders ./components/slider/demo/mark.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:37%"
+      style="left:0%;width:37%"
     />
     <div
       class="ant-slider-step"
@@ -762,7 +758,7 @@ exports[`renders ./components/slider/demo/tip-formatter.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:0%"
+      style="left:0%;width:0%"
     />
     <div
       class="ant-slider-step"
@@ -789,7 +785,7 @@ exports[`renders ./components/slider/demo/tip-formatter.md correctly 1`] = `
     />
     <div
       class="ant-slider-track"
-      style="visibility:visible;left:0%;width:0%"
+      style="left:0%;width:0%"
     />
     <div
       class="ant-slider-step"
@@ -826,7 +822,7 @@ exports[`renders ./components/slider/demo/vertical.md correctly 1`] = `
       />
       <div
         class="ant-slider-track"
-        style="visibility:visible;bottom:0%;height:30%"
+        style="bottom:0%;height:30%"
       />
       <div
         class="ant-slider-step"
@@ -857,7 +853,7 @@ exports[`renders ./components/slider/demo/vertical.md correctly 1`] = `
       />
       <div
         class="ant-slider-track ant-slider-track-1"
-        style="visibility:visible;bottom:20%;height:30%"
+        style="bottom:20%;height:30%"
       />
       <div
         class="ant-slider-step"
@@ -898,7 +894,7 @@ exports[`renders ./components/slider/demo/vertical.md correctly 1`] = `
       />
       <div
         class="ant-slider-track ant-slider-track-1"
-        style="visibility:visible;bottom:26%;height:11%"
+        style="bottom:26%;height:11%"
       />
       <div
         class="ant-slider-step"
diff --git a/components/timeline/style/index.less b/components/timeline/style/index.less
index 610ab815bc..73c8ad747b 100644
--- a/components/timeline/style/index.less
+++ b/components/timeline/style/index.less
@@ -63,7 +63,7 @@
       border: 0;
       height: auto;
       border-radius: 0;
-      padding: 3px 0;
+      padding: 3px 1px;
       transform: translate(-50%, -50%);
       top: 5px;
       left: 5px;