/* 商品頁：左側直排相簿、右側固定的說明與購買 */
.crumbs { font-size: 13px; color: var(--muted); padding-top: 28px; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; text-underline-offset: 4px; }

.product { padding: 32px 0 clamp(72px, 10vw, 140px); }
.product .wrap { display: grid; grid-template-columns: 7fr 5fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.gallery figure { margin: 0; }
.gallery img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; background: var(--surface); }
.gallery .wide { grid-column: 1 / -1; }
.gallery .wide img { aspect-ratio: 4 / 3; }

.info { position: sticky; top: 100px; }
.info .series { font-size: 13px; color: var(--muted); letter-spacing: .12em; }
.info h1 { margin-top: 8px; font-size: clamp(28px, 3vw, 40px); }
.info .tagline { margin-top: 14px; font-size: 17px; }
.info .desc { margin-top: 22px; color: var(--muted); }
.buy { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.buy-note { margin-top: 12px; font-size: 13px; color: var(--muted); }

/* 規格：分組小區塊，不做一列一線的表格 */
.specs { margin-top: 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.spec { background: var(--bg); padding: 18px 20px; }
.spec dt { font-size: 13px; color: var(--muted); letter-spacing: .08em; }
.spec dd { margin: 6px 0 0; font-size: 15.5px; }
.spec--wide { grid-column: 1 / -1; }

.related { border-top: 1px solid var(--line); }
.related__item { display: grid; grid-template-columns: 180px 1fr; gap: 28px; align-items: center; text-decoration: none; margin-top: 32px; max-width: 640px; }
.related__item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.related__item h3 { font-size: 22px; }
.related__item p { margin-top: 6px; color: var(--muted); }

@media (max-width: 860px) {
  .product .wrap { grid-template-columns: 1fr; }
  .info { position: static; }
  .gallery { grid-template-columns: 1fr; }
}
@media (max-width: 480px) { .specs { grid-template-columns: 1fr; } .related__item { grid-template-columns: 110px 1fr; gap: 18px; } }