我的引导程序表格无法正确压缩到移动设备上

Question

除“离开”表单外，我表单中的每个字段都运作良好。 这是一个旅行网站，我有w3学校提供的代码，可以从我的字段中自动填写国家/地区的条目，所以如果您输入c canada，cambodia等，请输入。

我将表格转换为引导程序，但存在相同的问题。 我认为自动完成代码中的某些内容阻止了它的正确缩放。 移动视图的屏幕截图在桌面模式下，一切正常

这是我的表单代码：

<div class="autocomplete">


<label class="sr-only" for="dateleaving"> Date Leaving:</label>
<input type="date" id="dateleaving" name="dateleaving" class="form-control mb-2 mr-sm-2" required="required" placeholder="Date Leaving" />

<label class="sr-only" for="datereturning"> Date Returning:</label>
<input type="date" id="datereturning" name="datereturning" class="form-control mb-2 mr-sm-2" required="required" placeholder="Date Returning" />

<label class="sr-only" for="myInput"> Leaving From:</label>
<input type="text" id="myInput" name="leavingfrom" class="form-control mb-2 mr-sm-2" required="required" placeholder="Leaving From" />


<label class="sr-only" for="vacapackage"> Package Selected:</label>
<select id="vacapackage" name="vacapackage" class="form-control mb-2 mr-sm-2" required="required" placeholder="Choose Your Package"  />
    <option value="caribbean">Caribbean New Year</option>
    <option value="polynesia">Polynesian Paradise</option>
    <option value="asia">Asian Expedition</option>
    <option value="europe">European Vacation</option>

</select>


    </div>
    <br />

  <button type="submit" class="btn btn-primary mb-2">Submit</button>

</form> 

这是我的CSS：

.autocomplete {
  display: inline-block;
}

input {
  border: 1px solid ;
  background-color: white;
  padding: 10px;
  font-size: 16px;
}

input[type=text] {
  background-color: white;
  width: 15%;
}

input[type=submit] {
  background-color: DodgerBlue;
  color: #fff;
}

.autocomplete-items {
  border: 1px solid #d4d4d4;
  border-bottom: none;
  border-top: none;
  z-index: 99;
  /*position the autocomplete items to be the same width as the container:*/
  top: 100%;
  left: 0;
  right: 0;
}

.autocomplete-items div {
  padding: 10px;
  cursor: pointer;
  background-color: DodgerBlue;
  border-bottom: 1px solid #d4d4d4;
}

.autocomplete-items div:hover {
  background-color: #e9e9e9;
}

.autocomplete-active {
  background-color: DodgerBlue !important;
  color: #ffffff;
}