/* カート / チェックアウトフロー専用 */
body { overflow-x: hidden; }
.order-summary-sp { position: fixed; bottom: 0; left: 0; right: 0; background: white; border-top: 1px solid #E5E5E5; z-index: 40; transition: transform 0.4s; }
@media (max-width: 768px) {
    .order-summary-sp.collapsed { transform: translateY(calc(100% - 64px)); }
    .summary-scroll { max-height: 60vh; overflow-y: auto; }
}