update docs

src/components/DescriptionList/index.md

@@ -15,10 +15,18 @@ cols: 1
 | 参数      | 说明                                      | 类型         | 默认值 |
 |----------|------------------------------------------|-------------|-------|
 | layout    | 布局方式                                 | Enum{'horizontal', 'vertical'}  | 'horizontal' |
-| col       | 指定信息分几列展示                         | number(0 < col <= 4)  | 3 |
+| col       | 指定信息最多分几列展示，最终一行几列由 col 配置结合[响应式规则](/components/DescriptionList#响应式规则)决定          | number(0 < col <= 4)  | 3 |
 | title     | 列表标题                                 | ReactNode  | - |
 | gutter    | 列表项间距，单位为 `px`                    | number  | 32 |
 
+#### 响应式规则
+
+| 窗口宽度             | 展示列数                                      | 
+|---------------------|---------------------------------------------|
+| `≥768px`           |  `col`                                       |
+| `≥576px`           |  `col < 2 ? col : 2`                         |
+| `<576px`           |  `1`                                         |
+
 ### DescriptionList.Description
 
 | 参数      | 说明                                      | 类型         | 默认值 |

src/components/PageHeader/demo/standard.md

@@ -7,8 +7,20 @@ title: Standard
 
 ````jsx
 import PageHeader from 'ant-design-pro/lib/PageHeader';
+import DescriptionList from 'ant-design-pro/lib/DescriptionList';
 import { Button, Menu, Dropdown, Icon, Row, Col } from 'antd';
 
+const { Description } = DescriptionList;
+
+const description = (
+  <DescriptionList col="2">
+    <Description term="创建人">曲丽丽</Description>
+    <Description term="订购产品">XX 服务</Description>
+    <Description term="创建时间">2017-07-07</Description>
+    <Description term="关联单据"><a href="">12421</a></Description>
+  </DescriptionList>
+);
+
 const menu = (
   <Menu>
     <Menu.Item key="1">选项一</Menu.Item>
@@ -71,7 +83,7 @@ ReactDOM.render(
       title="单号：234231029431"
       logo={<img alt="" src="https://gw.alipayobjects.com/zos/rmsportal/JcBAEvlHGhVvBekIJCWT.svg" />}
       action={action}
-      content="DescriptionList 占位"
+      content={description}
       extraContent={extra}
       breadcrumbList={breadcrumbList}
       tabList={tabList}