Bootstrap - 按钮被推送＆＃39;在小屏幕尺寸上的超大屏幕

Question

当浏览器高度降低到移动屏幕的高度时，按钮会被按下“按钮”。从底部的jumbotron出来。我该如何防止这种情况？

    <div class="jumbotron g">
        <div class="container-fluid">
          <div class="row">

            <div class="col-sm-6 text-center">
            </div>

            <div id="jumbocontent" class="col-lg-4 col-md-5 col-sm-12 col-
xs-12">
              <h1>This is the test text of the h1.</h1>
              <p>
The mate counts outside the area. A phenomenon seconds a baby 
characteristic next to the museum. A draining shelter scrolls the snail. A 
riding principal trashes the union. Into the obsessed sunlight suffers the 
sordid glow.</p>
              <button type="button" name="button" class="btn btn-primary 
btn-lg">Order Our Service</button>
            </div>

          </div>
        </div>
    </div>

由于