/**
from https://www.awaimai.com/2053.html#9
 */
 .vjs-paused .vjs-big-play-button, .vjs-paused.vjs-has-started .vjs-big-play-button {display: block;}
 .video-js .vjs-big-play-button {
   position: absolute;
     width: 3rem;
     height: 3rem;
     left: 50%;
     top: 50%;
     transform: translate(-50%,-50%);
     background: url("../../../images/bf.png") no-repeat 50%;
     background-size: contain;
     border: none;
     outline: none;
 }
 /* 中间的播放箭头 */
 .vjs-big-play-button .vjs-icon-placeholder {display: none;font-size: 2em;}
 /* 加载圆圈 */
 .vjs-loading-spinner {
     font-size: 2.5em;
     width: 2em;
     height: 2em;
     border-radius: 1em;
     margin-top: -1em;
     margin-left: -1.5em;
 }