bootstrap not stacking

not stacking on mobile devices for some reason

HTML

<body>

  <!--===========FOUR PACKAGES===========-->
  <div class="container-fluid offers">
    <div class="row row-eq-height">
      <!--adim edited-->
      <div class="col-md-6 website-package">
        <div class="row">
          <div class="col-md-4 col-md-offset-4 featured-image">
            <img class="center-block img-responsive package-icon" src="assets/img/website.png">
          </div>
          <div class="col-md-12 featured-image">
            <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren,
              no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et
              justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
          </div>
        </div>
      </div>
      <div class="col-md-6 website-package">
        <div class="row">
          <div class="col-md-4 col-md-offset-4 featured-image">
            <img class="center-block img-responsive package-icon" src="assets/img/online-shop.png">
          </div>
          <div class="col-md-12 featured-image">
            <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren,
              no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et
              justo duo dolores et ea rebum. Stet clita...

CSS

.img-responsive {
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: auto;
}

.img-responsive .header {
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: auto;
}

#logo {
  height: 50px;
  vertical-align: center;
}

.navbar-text > a {
  color: inherit;
  text-decoration: none;
}

.website-package {
  background: #5FA1A8;
  border-color: #fff;
  border-style: solid;
}

.featured-image {
  background: transparent;
  border: none;
}

.offers {
  background: #6DBDC5;
}

.package-icon {
  padding: 15px;
  display: block;
  background: transparent;
}


/*navbar color change after scroll*/

.navbar-default {
  background: transparent;
  border: none !important;
}

.navbar-nav>li>a:hover {
  color: #1a1a1a;
}

.collapse.in {
  background-color: rgba(0, 0, 0, 1) !important;
}

.navbar-inverse .navbar-nav>.active>a,
.navbar-inverse .navbar-nav>.active>a:hover,
.navbar-inverse .navbar-nav>.active>a:focus .spacer {
  background-color: #888;
}

.spacer {
  height: 100px;
}