chore: collapse样式调整

components/collapse/demo/accordion.md

@@ -2,7 +2,7 @@
 
 - order: 1
 
-手风琴，每次只打开一个tab。默认打开第一个
+手风琴，每次只打开一个tab。默认打开第一个。
 
 ---
 

components/collapse/demo/mix.md

@@ -2,7 +2,7 @@
 
 - order: 2
 
-手风琴嵌套折叠面板
+手风琴嵌套折叠面板。
 
 ---
 

package.json

@@ -37,7 +37,7 @@
     "object-assign": "~3.0.0",
     "rc-calendar": "~3.11.0",
     "rc-checkbox": "~1.0.6",
-    "rc-collapse": "~1.2.2",
+    "rc-collapse": "~1.2.3",
     "rc-dialog": "~4.4.0",
     "rc-dropdown": "~1.1.1",
     "rc-input-number": "~2.0.1",

style/components/collapse.less

 @prefixCls: ant-collapse;
-@borderStyle: 1px solid #e9e9e9;
+@borderStyle: 1px solid #d9d9d9;
 
 #arrow {
   .common(){
@@ -24,17 +24,19 @@
 .@{prefixCls} {
   background-color: #f4f4f4;
   border-radius: 3px;
-  border-top: @borderStyle;
-  border-left: @borderStyle;
-  border-right: @borderStyle;
+  border: @borderStyle;
 
   & > &-item {
+    border-top: @borderStyle;
+    &:first-child {
+      border-top: none;
+    }
+
     > .@{prefixCls}-header {
       height: 38px;
       line-height: 38px;
       text-indent: 16px;
       color: #666;
-      border-bottom: @borderStyle;
       &:before {
         display: inline-block;
         content: '\20';
@@ -68,12 +70,10 @@
   }
 
   &-content-active {
-    border-bottom: @borderStyle;
   }
 
   & > &-item-active {
     > .@{prefixCls}-header {
-      border-bottom: none;
 
       &:before {
         #arrow > .bottom(3px, 4px, #666);