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h2{color:#111827;margin:0;font-size:22px;line-height:1.2}.book-detail-images{gap:12px;display:grid}.book-detail-image{object-fit:contain;background:#f1f5f9;border-radius:8px;width:100%;height:auto;display:block}.wechat-long-press-tip{z-index:100;background:#0f172a6b;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.wechat-long-press-tip-panel{color:#111827;background:#fff;border-radius:8px;gap:12px;width:min(100%,320px);padding:20px;display:grid;box-shadow:0 18px 48px #0f172a38}.wechat-long-press-tip-panel h2{margin:0;font-size:20px;line-height:1.25}.wechat-long-press-tip-panel p{color:#374151;margin:0;font-size:15px;line-height:1.65}.wechat-long-press-tip-panel button{color:#fff;cursor:pointer;background:#111827;border:0;border-radius:7px;min-height:42px;font-size:15px;font-weight:700}.book-detail-content,.book-detail-gallery{padding:18px}.book-description{color:#374151;font-size:16px;line-height:1.78}.book-description p{margin:0 0 14px}.book-description strong{color:#111827;font-weight:850}.book-description-image{object-fit:contain;-webkit-touch-callout:default;-webkit-user-select:auto;user-select:auto;background:#f1f5f9;border-radius:8px;width:100%;max-width:100%;height:auto;margin:14px 0;display:block}.book-description p:last-child{margin-bottom:0}.book-back-to-top{z-index:30;cursor:pointer;opacity:0;pointer-events:none;background:#fffffff5;border:1px solid #0f172a24;border-radius:50%;place-items:center;width:46px;height:46px;transition:opacity .16s,transform .16s,background .16s;display:grid;position:fixed;bottom:18px;right:max(16px,50vw - 522px);transform:translateY(10px);box-shadow:0 12px 34px #0f172a2e}.book-back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}.book-back-to-top span{border-top:3px solid #0f172a;border-right:3px solid #0f172a;width:13px;height:13px;margin-top:5px;transform:rotate(-45deg)}.book-back-to-top:hover,.book-back-to-top:focus-visible{background:#fff;outline:2px solid #2563eb33}@media (min-width:760px){.book-admin-page,.book-list-page,.book-detail-page{padding:34px 28px 58px}.book-admin-page{align-items:center}.book-admin-panel{padding:28px}.book-admin-list-item{grid-template-columns:88px minmax(0,1fr);gap:14px;padding:12px}.book-admin-list.is-batch-mode .book-admin-list-item{grid-template-columns:32px 88px minmax(0,1fr)}.book-admin-list-item img{width:88px;height:110px}.book-admin-select-book{width:32px;min-height:110px}.book-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.book-image-sorter{grid-template-columns:repeat(5,minmax(0,1fr))}.book-card-link{grid-template-columns:120px minmax(0,1fr);gap:15px;padding:12px}.book-card img{width:120px;height:158px}.book-product-hero{grid-template-columns:minmax(300px,470px) minmax(0,1fr);align-items:start;gap:26px;padding:18px}.book-product-summary{align-content:start;gap:16px;padding:8px 4px;display:grid;position:sticky;top:24px}.book-product-summary h1{font-size:34px}.book-detail-content,.book-detail-gallery{padding:24px}.book-detail-images{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}}