.toc-nav{border-left:2px solid #eee;margin-left:10px;padding-left:20px}.toc-item,.toc-list,.toc-nav{position:relative}.toc-item{margin-bottom:15px}.toc-item:before{content:"";position:absolute;left:-27px;top:50%;transform:translateY(-50%);width:10px;height:10px;border-radius:50%;background-color:#eee;border:2px solid #fff;transition:all .3s ease;z-index:2}.toc-item.active:before{background-color:#007bff;box-shadow:0 0 0 4px rgba(0,123,255,.2);width:12px;height:12px}.toc-link{color:#666;text-decoration:none;font-size:13px;transition:color .3s ease;display:block}.toc-item.active .toc-link{color:#007bff;font-weight:600}