单选按钮居中

  <div id="disciplineFieldsDiv" class="form-inline col-md-4 searchInput" style="display:none;">
          <div class="form-control" style="border:none">
             <label>
             <input type="radio" class="minimal" name="discipline_fields" id="" value="0" checked>科技类
             </label>
             <label>
             <input type="radio" class="minimal" name="discipline_fields" id="" value="1">社科类
             </label>
           </div>
 </div>