.book-box{margin:0 10px}.left-menu{width:200px}.left-menu .menu-cusom{width:190px;height:calc(100vh - 56px);background:#fff;position:fixed;left:0;bottom:0;display:flex;flex-direction:column;border-right:1px solid #e6e6e6}.left-menu .menu-cusom span{display:block;line-height:36px;padding:0 20px;color:#252525;cursor:pointer;transition:all .2s}.left-menu .menu-cusom .active,.left-menu .menu-cusom span:hover{color:#1e9fff}.right-main{flex:1;padding:10px 10px 10px 20px;background:#fff;border-radius:10px}.right-main .item{margin-bottom:40px}.right-main .item h3{padding-bottom:20px;font-weight:700;color:#000;font-size:16px}.right-main .item img{width:1100px}