docs: Update home style

site/theme/template/Home/DesignPage/index.less

@@ -74,7 +74,6 @@
 
 .design-mini-panel {
   &:hover {
-    border-color: #f0f0f0;
     box-shadow: 0 3px 6px -4px rgba(0, 0, 0, 0.12), 0 6px 16px 0 rgba(0, 0, 0, 0.08),
       0 9px 28px 8px rgba(0, 0, 0, 0.05);
   }

site/theme/template/Layout/Header.jsx

@@ -167,7 +167,6 @@ class Header extends React.Component {
         <GitHubButton key="github" type="stargazers" namespace="ant-design" repo="ant-design" />
       ) : null,
       <Button
-        ghost
         size="small"
         onClick={this.handleDirectionChange}
         className="header-direction-button"
@@ -176,7 +175,6 @@ class Header extends React.Component {
         {this.getNextDirectionText()}
       </Button>,
       <Button
-        ghost
         size="small"
         onClick={this.handleLangChange}
         className="header-lang-button"