Responsive VPiX Tour

<style>
.iframe-wrapper#vpix-tour-wrapper{position:relative;width:100%}.iframe-wrapper#vpix-tour-wrapper:after{content:'';display:block;padding-top:56.25%}iframe#vpix-tour{position:absolute;top:0;left:0;width:100%;height:100%}
</style>
<div class="iframe-wrapper" id="vpix-tour-wrapper">
  <iframe id="vpix-tour" src="https://www.vpix.net/index.php?tour=461328&start_scene=309135"></iframe>
</div>