.btn-back[data-v-675ed41a]{display:flex;align-items:center;justify-content:center;gap:8px;width:100px;padding:5px;background-color:#656ef1;color:#fff;font-size:14px;font-weight:700;border:2px solid #656ef1;border-radius:6px;transition:all .3s ease}.btn-back i[data-v-675ed41a]{margin-bottom:2px;font-size:18px;color:#fff}.btn-back[data-v-675ed41a]:hover{transform:translateY(-2px);box-shadow:0 2px 6px rgba(101,110,241,.5)}.lesson__title{max-width:50%;margin:0 auto 20px;font-size:32px;text-align:center}.lesson__menu{position:sticky;position:-webkit-sticky;top:100px}.lesson__menu h4{margin-bottom:10px;font-size:16px}.lesson__menu .list{max-height:300px;overflow-y:auto;list-style:none}.lesson__menu .item{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:#000;margin-right:20px;padding:7.5px 12px;background:#e4e6ed;border:2px solid #e4e6ed;border-radius:10px;transition:all .3s ease}.lesson__menu .item span{min-height:21px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;word-break:break-word}.lesson__menu .item i{font-size:20px;color:green}.lesson__menu .item+.item{margin-top:8px}.lesson__menu .item.active,.lesson__menu .item:hover{border-color:#007aff;color:#007aff}.lesson__content,.lesson__menu-content{padding:20px 0 20px 20px;background-color:#fff;border-radius:16px}.lesson__content{min-height:500px;display:flex;flex-direction:column;background:#fff;border-radius:15px;padding:40px 15px 25px}.lesson__content .lesson__subTitle{margin-bottom:16px;font-size:20px;text-align:center}.lesson__content .lesson__text{margin-bottom:40px;font-size:16px}.lesson__btns{margin-top:auto;display:flex;align-items:center;justify-content:center}.lesson__btns button{width:100px;padding:6px;background-color:#fff;color:#656ef1;font-size:16px;font-weight:700;border:2px solid #656ef1;border-radius:6px;transition:all .3s ease}.lesson__btns button+button{margin-left:15px}.lesson__btns button:not(:disabled):hover{background-color:#656ef1;color:#fff}.lesson__btns button:disabled{opacity:.5}.box-mobile{display:none;margin-bottom:20px}.box-mobile h2{width:calc(100% - 60px);margin:0;font-size:18px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;word-break:break-word;text-align:left}.box-mobile button{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background-color:#fff;border-radius:4px}.box-mobile button i{color:#000!important}@media screen and (max-width:1200px){.box-mobile{display:flex;align-items:center;justify-content:space-between}.lesson__menu{margin-top:30px}.lesson__menu .list{max-height:calc(100vh - 100px)}.lesson__menu .item{margin-right:10px}}.lesson-page[data-v-582431c8]{width:100%;max-width:1470px;padding:0 15px;margin:80px auto 80px}