<Layout>
     <Header className="header">
       <div className="logo" />
       <Menu
       ....
       ....
      >
         <Menu.Item key="1">nav 1 </Menu.Item>
            ........
            .......
       </Menu>
     </Header>
     <Layout>
       <Sider>
        .....
        .....
      </Sider>
      <Layout >
        <Breadcrumb >
        ............
        .............
        </Breadcrumb>
        <Content>
          Content
        </Content>
      </Layout>
    </Layout>
  </Layout>