button.hydron-series-label{width:100%;border:0;border-top:1px solid var(--line);background:transparent;text-align:left;cursor:pointer}.product-nav #productList>button.hydron-series-label:first-child{border-top:0}.hydron-series-label i{margin-left:auto;font-style:normal;transition:transform .18s}.hydron-series-label.active i{transform:rotate(180deg)}.product-row.is-collapsed{display:none}