.coursebox-admin-nav .btn{margin-right:6px;margin-bottom:6px}.coursebox-thumb{width:80px;height:50px;object-fit:cover;border-radius:4px}.coursebox-card{overflow:hidden}.coursebox-cover{height:190px;background-size:cover;background-position:center;background-color:#f1f1f1}.coursebox-desc{min-height:45px}.coursebox-course-img{border-radius:6px}.coursebox-qrcode{max-width:280px;width:100%;height:auto;margin:15px auto;display:block}.coursebox-player{position:relative;width:100%;background:#000;margin-bottom:20px}.coursebox-player:before{content:"";display:block;padding-top:56.25%}.coursebox-player iframe,.coursebox-player video{position:absolute;top:0;left:0;width:100%;height:100%;border:0}.coursebox-lessons-list a{display:block;color:inherit}.coursebox-lessons-list .active a{color:#fff}.coursebox-html-content{font-size:15px;line-height:1.7}.coursebox-custom-html{margin-top:20px}.coursebox-store h2,.coursebox-learn h2{margin-top:0}.coursebox-stat{font-size:28px;font-weight:bold}