.product-shell{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(330px,.92fr);gap:56px;padding:48px 0 78px}
.product-shell>*{min-width:0}
.gallery-main{aspect-ratio:1;background:#f6f3ee;border-radius:var(--radius);overflow:hidden}.gallery-main img{width:100%;height:100%;object-fit:cover}.thumbs{display:flex;gap:10px;margin-top:12px;overflow:auto}.thumb{flex:0 0 72px;width:72px;height:72px;padding:0;border:2px solid transparent;border-radius:10px;overflow:hidden;background:#f6f3ee;cursor:pointer}.thumb.active{border-color:var(--ink)}.thumb img{width:100%;height:100%;object-fit:cover}
.product-info{align-self:start;position:sticky;top:96px}.product-info h1{margin:10px 0;font:500 clamp(32px,4vw,52px)/1.08 Georgia,"Songti SC",serif}.product-info .lead{color:var(--muted)}.product-price{display:flex;align-items:baseline;gap:10px;margin:22px 0}.product-price .price{font-size:38px}
.spec-section{padding:18px 0;border-top:1px solid var(--line)}.spec-label{display:flex;justify-content:space-between;margin-bottom:10px;font-size:13px;font-weight:700}.spec-options{display:flex;flex-wrap:wrap;gap:9px}.spec-btn{min-height:42px;padding:0 16px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}.spec-btn.active{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}.spec-btn:disabled{text-decoration:line-through;color:#aaa}
.purchase-row{display:flex;align-items:center;gap:16px;padding:18px 0}.purchase-actions{display:flex;gap:10px}.purchase-actions .btn{flex:1}.sku-line{padding:12px 14px;border-radius:10px;background:var(--warm);color:var(--muted);font-size:13px}
.product-details{border-top:1px solid var(--line)}.detail-intro{display:grid;grid-template-columns:1fr 1fr;gap:44px}.detail-intro h2{font:500 clamp(30px,4vw,48px)/1.1 Georgia,"Songti SC",serif}.detail-intro p{color:var(--muted)}.parameter-table{width:100%;margin-top:28px}.parameter-table th,.parameter-table td{padding:14px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.parameter-table th{width:32%;color:var(--muted);font-weight:500}.detail-images{max-width:860px;margin:36px auto 0}.detail-images img{width:100%;height:auto;object-fit:cover}.text-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.text-card{padding:24px;border:1px solid var(--line);border-radius:var(--radius)}.text-card h3{margin-bottom:10px}.text-card p,.text-card li{color:var(--muted);font-size:14px}.text-card ul{list-style:disc;padding-left:18px}
.product-mobile-bar{display:none}
@media(max-width:820px){.product-shell{grid-template-columns:1fr;gap:30px}.product-info{position:static}.detail-intro{grid-template-columns:1fr}.text-columns{grid-template-columns:1fr}.product-mobile-bar{display:flex;gap:8px}.product-mobile-bar .btn{flex:1}}
@media(max-width:480px){.product-shell{padding-top:18px}.purchase-actions{display:none}.gallery-main{margin-inline:-14px;border-radius:0}.product-info h1{font-size:34px}.product-price .price{font-size:32px}}