```css <form class="form-inline" role="form"> <div class="form-group"> <label class="sr-only" for="exampleInputEmail2">邮箱</label> <input type="email" class="form-control" id="exampleInputEmail2" placeholder="请输入你的邮箱地址"> </div> <div class="form-group"> <label class="sr-only" for="exampleInputPassword2">密码</label> <input type="password" class="form-control" id="exampleInputPassword2" placeholder="请输入你的邮箱密码"> </div> <div class="checkbox"> <label> <input type="checkbox"> 记住密码 </label> </div> <button type="submit" class="btn btn-default">进入邮箱</button> </form> ``` ``` from class="form-inline" ```