xinsi_book/src/plugin/xml-digital-teaching/lib/video.min.css

.xml-video-container-pdf[data-v-5449b515]{position:relative;display:flex;justify-content:center;align-items:center;width:100%;height:0;padding-bottom:56.25%;background:#000}.xml-video-container-pdf .cover[data-v-5449b515]{position:absolute;top:0;max-width:100%;max-height:100%}.xml-video-container-pdf .play[data-v-5449b515]{position:absolute;top:45%;left:45%;width:10%;background:#bebebe;border-radius:50%}