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HTML

              
                <div class="card-section">
  <div class="inner">
    <div class="container">
      <div class="row">
        <div class="col-sm-4">
          <div class="card">
            <div class="card-body">
              
            </div>
            <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="false">
              <div class="panel panel-default">
                <div class="panel-heading" role="tab" id="headingOne">
                  <a class="panel-button" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="false" aria-controls="collapseOne"><span class="plus-minus"></span></a>
                </div>
                <div id="collapseOne" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne">
                  <div class="panel-body">
                    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
                    on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
                    raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
                  </div>
                </div>
              </div>

            </div>
            <!-- card-body -->
          </div>
          <!-- card -->
        </div>

        <div class="col-sm-4">
          <div class="card">
            <div class="card-body">
              
            </div>
            <div class="panel-group" id="accordion2" role="tablist" aria-multiselectable="false">
              <div class="panel panel-default">
                <div class="panel-heading" role="tab" id="headingTwo">
                  <a class="panel-button" data-toggle="collapse" data-parent="#accordion2" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"><span class="plus-minus"></span></a>
                </div>
                <div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
                  <div class="panel-body">
                    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
                    on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
                    raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
                  </div>
                </div>
              </div>

            </div>
            <!-- card-body -->
          </div>
          <!-- card -->
        </div>

        <div class="col-sm-4">
          <div class="card">
            <div class="card-body">
              
            </div>
            <div class="panel-group" id="accordion3" role="tablist" aria-multiselectable="false">
              <div class="panel panel-default">
                <div class="panel-heading" role="tab" id="headingThree">
                  <a class="panel-button" data-toggle="collapse" data-parent="#accordion3" href="#collapseThree" aria-expanded="false" aria-controls="collapseTwo"><span class="plus-minus"></span></a>
                </div>
                <div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
                  <div class="panel-body">
                    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird
                    on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table,
                    raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
                  </div>
                </div>
              </div>

            </div>
            <!-- card-body -->
          </div>
          <!-- card -->
        </div>
      </div>
    </div>
  </div>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
              
            
!

CSS

              
                .card {
    padding: 10px 0px 10px;
    background-color: #333333;
    min-height: 400px;
    max-height: 600px;
    border-radius: 8px;
    box-shadow: 0px 8px 20px #0000007a;
}

.card-body {
    padding: 0px 15px;
    color: white;
}

.panel-default {
    border: none;
}

.panel-group {
    position: absolute;
    bottom: -1px;
    margin-bottom: 0px;
    width: 100%;
    padding-right: 30px;
}

.panel-group .panel-heading+.panel-collapse>.panel-body, .panel-group .panel-heading+.panel-collapse>.list-group {
    border: none;
}

.panel-group .panel {
    border-radius: 0px 0px 8px 8px;
    background-color: #e6e6e6;
}

.panel-body {
    min-height: 250px;
    overflow: auto;
    border-radius: 0px 0px 8px 8px;
    padding: 0px 15px 10px;
}

.panel-default>.panel-heading {
    background-color: transparent;
}

.panel-heading {
    text-align: center;
    padding: 0px;
    height: 35px;
    border: none;
}

.panel-button {
    padding: 20px;
    background: #999999;
    border-radius: 100%;
    position: relative;
    top: -13px;
    z-index: 9999;
}

.panel-button .plus-minus:before{
    content: "\f067";
    font-family: "FontAwesome";
}

.panel-button[aria-expanded="true"] .plus-minus:before{
    content: "\f068";
    font-family: "FontAwesome";
}



a.panel-button:hover, a.panel-button:focus {
    text-decoration: none;
}

a.panel-button {
    font-size: 18px;
    color: #333333;
    box-shadow: 0px 3px 7px #0000004a;
}

.card-section {
    height: 100vh;
    display: table;
    width: 100%;
    background-color: slategray;
  overflow: hidden;
}

.card-section > .inner {
    display: table-cell;
    vertical-align: middle;
    
}

@media (max-width: 991px) {
    .card {
        margin-top: 20px;
        margin-bottom: 20px;
    } 
} 

@media (max-width: 768px) {
  .card {
    min-height: 300px;
  }
  .panel-body {
    max-height: 200px;
    font-size: 15px;
    padding: 0px 5px;
  }
} 
              
            
!

JS

              
                
              
            
!
999px

Console