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#ebebeb;z-index:10;border-radius:8px;position:absolute;right:-192px;bottom:2px;background-color:#fff;width:300px;padding:10px 20px;font-size:14px;color:#555}.top-panel .right .hover-box .triangle{display:block;position:absolute;bottom:8px;left:-15px;width:0;height:0;border:8px solid;box-shadow:0 0 20px #ebebeb;border-color:transparent #fff transparent transparent}.top-panel .right .text-link{font-size:16px;color:#448dff;align-self:flex-end;margin-top:-20px}.top-panel .right .info-box{flex:auto;display:flex;justify-content:space-between;align-items:center}.top-panel .right .info-box .box{font-size:16px;display:flex;align-items:center;color:#999}.top-panel .right .info-box .icon{margin-right:3px}.top-panel .right .info-box .icon.course{width:16px;height:16px}.top-panel .right .info-box .icon.eye{width:21px;height:15px}.top-panel .right .info-box .icon.homework{width:16px}.bottom-panel{margin-bottom:80px}.bottom-panel .header-box{margin:42px 0 24px;display:flex;align-items:center;justify-content:space-between}.bottom-panel .header-box .btns{border-radius:5px;background-color:#fff;border:1px solid #ececec;font-size:0}.bottom-panel .header-box .btns .btn-box{display:inline-block;font-size:16px;color:#333;line-height:38px;padding:0 15px;cursor:pointer}.bottom-panel .header-box .btns .btn-box.cur{border-radius:5px;border-color:#136fe4;background-color:#136fe4;color:#fff}.bottom-panel .video-panel{display:flex;flex-wrap:wrap;justify-content:space-between}.bottom-panel .card{margin-top:20px;display:inline-block;vertical-align:top;width:380px;min-height:320px;padding:12px 11px 14px;border:1px solid #ececec;border-radius:10px;position:relative;cursor:pointer;background-color:#fff}.bottom-panel .card.placehoder{visibility:hidden}.bottom-panel .card .flag{position:absolute;top:12px;right:9px;z-index:5;padding:0 10px;line-height:28px;border-radius:0 5px 0 10px;font-size:16px;color:#fff;background-color:#999}.bottom-panel .card .flag.unlock{background-color:#31b775}.bottom-panel .card .cover-box{display:block;width:358px;height:197px;margin:0 auto;border-radius:5px 6px 5px 5px;position:relative;overflow:hidden}.bottom-panel .card .cover-box img.cover{display:inline-block;vertical-align:top;cursor:pointer}.bottom-panel .card .cover-box .play-icon-box{position:absolute;left:0;right:0;bottom:0;z-index:2;height:70px;background:linear-gradient(0deg,rgba(0,0,0,.6),transparent)}.bottom-panel .card .cover-box .play-icon{position:absolute;right:20px;bottom:20px;width:50px;height:50px;cursor:pointer}.bottom-panel .card .title{cursor:pointer;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;max-height:1.5em;margin:15px 0 12px;font-size:18px;color:#333;font-weight:400}.bottom-panel .card .author{color:#333;font-size:14px}.bottom-panel .card .info{display:flex;justify-content:space-between;align-items:center;margin-top:10px}.bottom-panel .card .info .left{display:flex;font-size:12px;color:#747474;align-items:center}.bottom-panel .card .info .left i{font-style:normal}.bottom-panel .card .info .right .state{font-size:12px;padding:3px 11px;text-align:center;line-height:20px;height:20px;border-radius:20px;color:#999;border:1px solid #999}.bottom-panel .card .info .right .state:first-child{margin-right:10px}.bottom-panel .card .info .right .state.active{border:1px solid #448dff;color:#448dff}.tips-dialog{background-color:#fff;display:flex;align-items:center;justify-content:center}.feedback-dialog{width:650px;height:400px;border-radius:8px;background-color:#fff;box-shadow:0 0 20px #ebebeb;max-width:unset}.feedback-dialog .content-box{display:flex}.feedback-dialog .content-box .swiper-item-slide{width:30%!important;height:100%}.contact-panel-side{display:flex;position:fixed;top:30%;right:0}.contact-panel-side .item--qrcode{height:251px;display:flex;flex-direction:column;justify-content:space-between;align-items:center;border-radius:8px;background:#fafafa;padding:10px}