添加demo图标

docs/uncompiled/artplayer.css

@@ -3,7 +3,7 @@
 .artplayer-video-player .artplayer-subtitle{position:absolute;z-index:20;bottom:40px;width:100%;padding:0 20px;text-align:center;color:#fff;font-size:20px;pointer-events:none;text-shadow:.5px .5px .5px rgba(0,0,0,.5)}.artplayer-video-player .artplayer-subtitle p{margin:5px 0}.artplayer-video-player.artplayer-subtitle-hide .artplayer-subtitle{display:none}
 .artplayer-video-player .artplayer-danmuku{position:absolute;z-index:30;left:0;top:0;right:0;bottom:0;width:100%;height:100%;overflow:hidden;pointer-events:none}
 .artplayer-video-player .artplayer-layers{position:absolute;z-index:40;left:0;top:0;right:0;bottom:0;width:100%;height:100%;overflow:hidden;pointer-events:none}.artplayer-video-player .artplayer-layers .art-layer{pointer-events:all}.artplayer-video-player.artplayer-layers-hide .artplayer-layers{display:none}
-.artplayer-video-player .artplayer-mask{display:none;position:absolute;z-index:50;left:0;top:0;right:0;bottom:0;width:100%;height:100%;overflow:hidden;pointer-events:none}.artplayer-video-player .artplayer-mask .art-state{position:absolute;right:30px;bottom:65px;opacity:.6}.artplayer-video-player.artplayer-mask-show .artplayer-mask{display:-webkit-box;display:-ms-flexbox;display:flex}
+.artplayer-video-player .artplayer-mask{display:none;position:absolute;z-index:50;left:0;top:0;right:0;bottom:0;width:100%;height:100%;overflow:hidden;pointer-events:none}.artplayer-video-player .artplayer-mask .art-state{-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;position:absolute;right:30px;bottom:55px;width:60px;height:60px;opacity:.6}.artplayer-video-player.artplayer-mask-show .artplayer-mask,.artplayer-video-player .artplayer-mask .art-state{display:-webkit-box;display:-ms-flexbox;display:flex}
 .artplayer-video-player .artplayer-loading{display:none;position:absolute;z-index:70;left:0;top:0;right:0;bottom:0;width:100%;height:100%;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;pointer-events:none}.artplayer-video-player.artplayer-loading-show .artplayer-loading{display:-webkit-box;display:-ms-flexbox;display:flex}
 .artplayer-video-player .artplayer-bottom{position:absolute;z-index:60;left:0;right:0;bottom:0;height:100px;padding:60px 10px 0;opacity:0;visibility:hidden;-webkit-transition:all .2s ease-in-out;transition:all .2s ease-in-out;pointer-events:none;background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADGCAYAAAAT+OqFAAAAdklEQVQoz42QQQ7AIAgEF/T/D+kbq/RWAlnQyyazA4aoAB4FsBSA/bFjuF1EOL7VbrIrBuusmrt4ZZORfb6ehbWdnRHEIiITaEUKa5EJqUakRSaEYBJSCY2dEstQY7AuxahwXFrvZmWl2rh4JZ07z9dLtesfNj5q0FU3A5ObbwAAAABJRU5ErkJggg==) repeat-x bottom}.artplayer-video-player .artplayer-bottom .artplayer-progress{position:relative;pointer-events:all}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress{position:relative;height:5px;padding:1px 0;cursor:pointer}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner{position:relative;height:100%;background:hsla(0,0%,100%,.2)}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-loaded{position:absolute;z-index:10;left:0;top:0;right:0;bottom:0;height:100%;width:0;background:hsla(0,0%,100%,.4)}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-played{position:absolute;z-index:20;left:0;top:0;right:0;bottom:0;height:100%;width:0}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-highlight{position:absolute;z-index:30;left:0;top:0;right:0;bottom:0;height:0}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-highlight span{display:inline-block;position:absolute;left:0;top:0;width:7px;height:3px;background:#fff;border-radius:3px}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-indicator{display:none;position:absolute;z-index:40;top:-5px;left:-6.5px;width:13px;height:13px;border-radius:50%}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-indicator.art-show-indicator{display:block}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress .art-control-progress-inner .art-progress-tip{display:none;position:absolute;z-index:50;top:-25px;left:0;height:20px;padding:0 5px;line-height:20px;color:#fff;font-size:12px;text-align:center;background:rgba(0,0,0,.7);border-radius:3px;font-weight:700;white-space:nowrap}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress:hover .art-progress-indicator,.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-progress:hover .art-progress-tip{display:block}.artplayer-video-player .artplayer-bottom .artplayer-progress .art-control-thumbnails{display:none;position:absolute;bottom:8px;left:0;pointer-events:none;background-color:rgba(0,0,0,.7)}.artplayer-video-player .artplayer-bottom .artplayer-controls{position:relative;pointer-events:all;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;height:36px}.artplayer-video-player .artplayer-bottom .artplayer-controls .artplayer-controls-left,.artplayer-video-player .artplayer-bottom .artplayer-controls .artplayer-controls-right{display:-webkit-box;display:-ms-flexbox;display:flex}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control{opacity:.9;font-size:12px;height:36px;min-width:36px;line-height:36px;text-align:center;cursor:pointer}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control .art-icon{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;float:left;height:36px;width:36px}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control:hover{opacity:1}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control-volume .art-volume-panel{position:relative;float:left;width:0;height:100%;-webkit-transition:margin .2s cubic-bezier(.4,0,1,1),width .2s cubic-bezier(.4,0,1,1);transition:margin .2s cubic-bezier(.4,0,1,1),width .2s cubic-bezier(.4,0,1,1);overflow:hidden}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control-volume .art-volume-panel .art-volume-slider-handle{position:absolute;top:50%;left:0;width:12px;height:12px;border-radius:12px;margin-top:-6px;background:#fff}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control-volume .art-volume-panel .art-volume-slider-handle:before{left:-54px;background:#fff}.artplayer-video-player .artplayer-bottom .artplayer-controls .art-control-volume .art-volume-panel .art-volume-slider-handlLine truncated
 .artplayer-video-player .artplayer-notice{display:none;font-size:14px;position:absolute;z-index:80;left:0;top:0;padding:10px;width:100%;pointer-events:none}.artplayer-video-player .artplayer-notice .artplayer-notice-inner{display:inline-block;padding:5px 10px;color:#fff;background:rgba(0,0,0,.6);border-radius:3px}.artplayer-video-player.artplayer-notice-show .artplayer-notice{display:-webkit-box;display:-ms-flexbox;display:flex}