我有 2 種不同的變量樣式，可在頁面的 2 個不同位置使用：/* Header Bar Count*/.sticky-count {    font-size: 1em;}/* Footer Bar Count*/.sticky-count-footer {    font-size: 0.5em;}我有這段代碼通過 Ajax 事件更新 $cart_count變量：// Woocommerce Ajax Countadd_filter( 'woocommerce_add_to_cart_fragments', 'refresh_cart_count', 50, 1 );function refresh_cart_count( $fragments ){    ob_start();    ?>    <span class="e434-21 x-bar-content-area sticky-count" id="cart-count"><?php    $cart_count = WC()->cart->get_cart_contents_count();    echo sprintf ( _n( '%d', '%d', $cart_count ), $cart_count );    ?></span>    <?php     $fragments['.sticky-count, .sticky-count-footer'] = ob_get_clean();    return $fragments;}現(xiàn)在每次$cart_count更改時，頁眉和頁腳中的項目都會更新，但.sticky-count-footer樣式將類似于.sticky-count! 如何.sticky-count-footer用它自己的 CSS 屬性更新值？