.stm_video{display:block;position:relative;background-size:cover}.stm_video iframe{position:absolute;top:0;left:0;right:0;bottom:0;width:100%;height:100%;border:0;z-index:100}.has_poster{background-position:50% 0!important}.has_poster .stm_playb{position:absolute;left:50%;top:50%;margin:-55px 0 0 -55px;opacity:.85}.has_poster .stm_playb:hover{opacity:1}.stm_video.stm_video_style_4{background-position:50% 50%}.stm_video.stm_video_style_4 .stm_playb{width:80px;height:80px;margin:-40px 0 0 -40px}.stm_video.stm_video_style_4 .stm_playb:after{content:'';display:block;position:absolute;top:0;left:0;right:0;bottom:0;background-color:#fff0;border-radius:50%;border:2px solid #fff}.stm_video.stm_video_style_4 .stm_playb:before{content:'';display:block;position:absolute;top:50%;left:50%;margin:-11px 0 0 -8px;width:0;height:0;border-style:solid;border-width:12px 0 12px 21px;border-left-color:#fff;border-top-color:#fff0;border-bottom-color:#fff0;border-right-color:#fff0;z-index:20}