如何减少bootstrap中的左边距和上边距

Question

我的代码需要帮助 使用bootstrap设计其中的新内容。做了顶级导航，做侧栏。但是左侧的杆没有向左侧完成，而顶部和侧面之间的间隙太大。我怎么能减少它

<!--BEGINING NAV=========================-->

            <nav  class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#"><img src="../img/logo.png" alt="Logo"></a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>
        <li><a href="#">General Requirment</a></li>


      </ul>
      <form class="navbar-form navbar-left" role="search">
        <div class="form-group">
          <input type="text" class="form-control inputcurve" placeholder="Search">
        </div>
        <button type="submit" class="btn btn-default redbut"><span class="glyphicon glyphicon-search red"></button>
      </form>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><span class="glyphicon glyphicon-earphone" aria-hidden="true"></span> 07063859559</a></li>
        <li><a href="#"><span class="glyphicon glyphicon-envelope" aria-hidden="true"></span> info@myactiveschool.com</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Chike Okoli Vitalis <span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu nav1">
             <li><a href="#"><i class="glyphicon glyphicon-picture"></i> Profile Picture</a></li>
            <li><a href="#"><i class="glyphicon glyphicon-edit"></i> Account Setting</a></li>
            <li><a href="#"><li><a href="#"><i class="glyphicon glyphicon-log-out"></i> Logout</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

 <!--END NAV=========================-->

               <div class="collapse navbar-collapse navbar-ex1-collapse">
                    <div class="col-md-3">
                       <ul class="nav nav-pills nav-stacked span3">
                           <li class="active"><a href="#"><i class="glyphicon glyphicon-picture"></i>Home</a></li>
                           <li><a href="#"><i class="glyphicon glyphicon-edit"></i>About us</a></li>
                       </ul>
                    </div>
               </div>       

<!--START SIDE NAV===================================================================================================================================-->
here is my css

 .side-nav {
        position: fixed;
        top: 51px;
        left: 225px;
        width: 225px;
        margin-left: -225px;
        border: none;
        border-radius: 0;
        overflow-y: auto;
        background-color: #222;
        bottom: 0;
        overflow-x: hidden;
        padding-bottom: 40px;
    }

    .side-nav>li>a {
        width: 225px;
    }

    .side-nav li a:hover,
    .side-nav li a:focus {
        outline: none;
        background-color: #000 !important;
    }
}

.side-nav>li>ul {
    padding: 0;
}

.side-nav>li>ul>li>a {
    display: block;
    padding: 10px 15px 10px 38px;
    text-decoration: none;
    color: #999;
}

.side-nav>li>ul>li>a:hover {
    color: #fff;
}
.side-nav{right: 0;left: auto;}