/* ============================================================
   AquaClean Product Detail Page — Alibaba-style layout
   Built on site design system (style.css variables)
   ============================================================ */

.product-detail { font-family: 'Inter', sans-serif; color: var(--text); background: #fff; }

/* ---------- Breadcrumb ---------- */
.d-breadcrumb { background: var(--bg-alt); border-bottom: 1px solid var(--border); padding: 12px 24px; font-size: 13px; color: var(--text-muted); }
.d-breadcrumb-inner { max-width: var(--container); margin: 0 auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.d-breadcrumb a { color: var(--primary); text-decoration: none; }
.d-breadcrumb a:hover { text-decoration: underline; }
.d-breadcrumb .sep { color: #CBD5E1; }

/* ---------- Main two-column layout ---------- */
/* align-items:start + 右列 sticky ── 列高不齐由左列内容（描述/属性卡）负责补，
   绝不能靠拉伸图集来补（那会把 1:1 的主图框拉成竖长条，照片上下留大白边）。 */
.d-layout { max-width: var(--container); margin: 0 auto; padding: 32px 24px; display: grid; grid-template-columns: 52% 1fr; gap: 40px; align-items: start; }

/* ---------- Left column: gallery + description + attributes ---------- */
.d-left { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.d-desc-side { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px 24px 22px; box-shadow: var(--shadow); }
.d-desc-side .d-sec-label { margin-bottom: 4px; }
.d-desc-title { font-size: 17px; font-weight: 800; color: var(--secondary); margin: 0 0 10px; }
.d-desc-side .d-desc-text { max-width: none; font-size: 14.5px; line-height: 1.85; }
.d-desc-side .d-desc-img { margin-top: 14px; }

/* 关键属性卡（左列，补高度用）*/
.d-attr-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px 24px 16px; box-shadow: var(--shadow); }
.d-attr-list { display: flex; flex-direction: column; }
.d-attr-row { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: 13.5px; }
.d-attr-row:last-child { border-bottom: none; }
.d-attr-row .k { color: var(--text-muted); font-weight: 500; flex-shrink: 0; }
.d-attr-row .k::before { content: ''; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--primary); margin-right: 8px; vertical-align: middle; }
.d-attr-row .v { color: var(--secondary); font-weight: 600; text-align: right; }
.d-attr-more { display: inline-block; margin-top: 10px; font-size: 13px; font-weight: 700; color: var(--primary); text-decoration: none; }
.d-attr-more:hover { text-decoration: underline; }

/* ---------- Image gallery (Alibaba: vertical thumbs left, square main image) ---------- */
/* flex:0 0 auto —— 不拉伸、不压缩。主图恒为 1:1 正方形（= 列宽 - 缩略图列），
   照片 object-fit:contain 铺满且不变形；列高不齐由左列其它卡片负责。 */
.d-gallery { position: relative; display: flex; gap: 14px; align-items: flex-start; flex: 0 0 auto; }
.d-gallery-thumbs { flex: 0 0 68px; display: flex; flex-direction: column; gap: 10px; max-height: 520px; overflow-y: auto; padding-right: 2px; scrollbar-width: thin; }
.d-gallery-thumb { border-radius: 10px; overflow: hidden; border: 2px solid transparent; cursor: pointer; aspect-ratio: 1; background: var(--bg-alt); transition: var(--transition); display: flex; align-items: center; justify-content: center; padding: 4px; flex-shrink: 0; }
.d-gallery-thumb img { width: 100%; height: 100%; object-fit: contain; }
.d-gallery-thumb.active, .d-gallery-thumb:hover { border-color: var(--primary); }
.d-gallery-thumb.video-thumb { background: var(--bg-dark); color: #fff; font-size: 20px; }
.d-gallery-main { flex: 1 1 auto; position: relative; border-radius: 16px; overflow: hidden; background: #fff; border: 1px solid var(--border); aspect-ratio: 1; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow); cursor: zoom-in; }
.d-gallery-main img { width: 100%; height: 100%; object-fit: contain; transition: transform .18s ease; will-change: transform; }
.d-gallery-main.zooming img { transition: none; }
.d-gallery-count { position: absolute; left: 12px; bottom: 12px; background: rgba(15,23,42,.62); color: #fff; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 100px; letter-spacing: .02em; }
.d-gallery-zoom { position: absolute; right: 12px; bottom: 12px; width: 34px; height: 34px; border-radius: 8px; background: rgba(255,255,255,0.92); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 16px; color: var(--text-muted); cursor: pointer; }
.d-gallery-video { position: absolute; inset: 0; display: none; background: #0F172A; align-items: center; justify-content: center; }
.d-gallery-video.show { display: flex; }
.d-gallery-video video { width: 100%; height: 100%; object-fit: contain; }

/* ---------- Product info panel ---------- */
/* align-self:start —— 不能让购买框被 stretch 拉伸到和左列一样高，
   否则 sticky 没有可滚动的余量，吸顶就失效了。 */
.d-info { position: sticky; top: 84px; align-self: start; }
.d-info h1 { font-size: 26px; font-weight: 800; color: var(--secondary); margin: 0 0 6px; line-height: 1.25; }
.d-info .d-tagline { font-size: 15px; color: var(--text-muted); margin: 0 0 16px; line-height: 1.6; }
.d-info .d-model { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.d-info .d-model b { color: var(--text); font-weight: 600; }

/* Cert badges */
.d-certs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.d-cert-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 100px; background: #ECFDF5; color: #059669; border: 1px solid #A7F3D0; }
.d-cert-badge .cert-star { color: #F59E0B; }

/* Key attribute chips (quick specs) */
.d-quick-specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.d-quick-spec { font-size: 12.5px; font-weight: 600; color: var(--secondary); background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 6px 12px; }
.d-quick-spec b { color: var(--primary); font-weight: 700; }

/* Price ladder — Alibaba style */
.d-price-block { background: linear-gradient(135deg, #EFF6FF, #DBEAFE); border: 1px solid #BFDBFE; border-radius: 14px; padding: 18px 20px; margin-bottom: 18px; }
/* price ladder 3-column Alibaba cards (kept d-price-row for legacy) */
.d-price-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 6px; }
.d-price-card { position: relative; border: 1.5px solid var(--border); border-radius: 10px; padding: 16px 8px 12px; text-align: center; background: #fff; transition: var(--transition); }
.d-price-card.best { border-color: var(--primary); background: #EFF6FF; }
.d-price-best { position: absolute; top: -10px; left: 50%; transform: translateX(-50%); background: var(--primary); color: #fff; font-size: 10.5px; font-weight: 700; padding: 2px 10px; border-radius: 20px; white-space: nowrap; }
.d-price-range { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.d-price-val { font-size: 24px; font-weight: 800; color: var(--primary); line-height: 1; }
.d-price-val .cur { font-size: 13px; font-weight: 700; margin-right: 1px; }
.d-price-moq { font-size: 13px; color: var(--text-muted); margin-top: 14px; padding-top: 10px; border-top: 1px dashed #BFDBFE; }
.d-price-moq b { color: var(--secondary); }
.d-ta-icon { color: var(--primary); }

/* SKU selector */
.d-sku { margin-bottom: 18px; }
.d-sku-title { font-size: 13px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 8px; }
.d-sku-title span { color: var(--secondary); font-weight: 600; }
.d-sku-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.d-sku-opt { font-size: 13px; font-weight: 600; color: var(--text); background: #fff; border: 2px solid var(--border); border-radius: 8px; padding: 7px 14px; cursor: pointer; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
.d-sku-opt:hover { border-color: var(--primary-light); }
.d-sku-opt.active { border-color: var(--primary); color: var(--primary); background: #EFF6FF; }
.d-sku-opt .swatch { width: 14px; height: 14px; border-radius: 50%; border: 1px solid var(--border); display: inline-block; }

/* Highlights */
.d-highlights { margin-bottom: 18px; }
.d-highlights-title { font-size: 13px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 10px; }
.d-highlight-item { display: flex; align-items: flex-start; gap: 10px; padding: 7px 0; font-size: 14px; font-weight: 500; color: var(--text); }
.d-highlight-item .ico { width: 30px; height: 30px; border-radius: 8px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 15px; flex-shrink: 0; color: var(--primary); }

/* CTA buttons */
.d-cta { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.d-cta .btn { width: 100%; justify-content: center; }
.btn-whatsapp { background: #25D366; color: #fff; box-shadow: 0 4px 14px rgb(37 211 102 / 0.3); }
.btn-whatsapp:hover { background: #20BA5A; color: #fff; }
.btn-secondary { background: var(--bg-alt); color: var(--secondary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

/* Trust / shipping strip */
.d-trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.d-trust-item { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; text-align: center; }
.d-trust-item .t-ico { font-size: 18px; margin-bottom: 4px; }
.d-trust-item .t-label { font-size: 11px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.d-trust-item .t-value { font-size: 13px; font-weight: 700; color: var(--secondary); margin-top: 2px; }

/* ---------- Sections ---------- */
.d-section { padding: 56px 24px; }
.d-section-alt { background: var(--bg-alt); }
.d-section-inner { max-width: var(--container); margin: 0 auto; }
.d-sec-label { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--primary); margin-bottom: 8px; }
.d-sec-title { font-size: clamp(24px, 3vw, 32px); font-weight: 800; color: var(--secondary); line-height: 1.2; margin: 0 0 28px; }

/* Supplier card */
.d-supplier { display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center; background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 24px 28px; box-shadow: var(--shadow); }
.d-supplier-logo { width: 72px; height: 72px; border-radius: 14px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 30px; }
.d-supplier-name { font-size: 18px; font-weight: 800; color: var(--secondary); margin: 0 0 4px; }
.d-supplier-meta { font-size: 13px; color: var(--text-muted); margin: 0 0 10px; }
.d-supplier-stats { display: flex; gap: 24px; flex-wrap: wrap; }
.d-supplier-stat .v { font-size: 18px; font-weight: 800; color: var(--secondary); }
.d-supplier-stat .l { font-size: 12px; color: var(--text-muted); }
.d-supplier-side { text-align: right; }
.d-supplier-stars { color: var(--accent); font-size: 16px; letter-spacing: 2px; }
.d-supplier-verified { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 700; color: var(--success); background: #ECFDF5; border-radius: 100px; padding: 4px 10px; margin-top: 8px; }

/* Key attributes grid (Alibaba style) */
.d-attr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: #fff; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
.d-attr-item { display: flex; justify-content: space-between; gap: 16px; padding: 13px 20px; border-bottom: 1px solid var(--border); font-size: 14px; }
.d-attr-item:nth-child(odd) { background: var(--bg-alt); }
.d-attr-item:nth-child(even) { background: #fff; }
.d-attr-item:nth-last-child(-n+2) { border-bottom: none; }
.d-attr-name { color: var(--text-muted); font-weight: 500; flex-shrink: 0; }
.d-attr-value { color: var(--secondary); font-weight: 600; text-align: right; }

/* Packaging table */
.d-spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); }
.d-spec-table th { background: var(--secondary); color: #fff; padding: 14px 20px; text-align: left; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.d-spec-table td { padding: 12px 20px; border-bottom: 1px solid var(--border); font-size: 14px; }
.d-spec-table tr:last-child td { border-bottom: none; }
.d-spec-table tr:nth-child(even) td { background: var(--bg-alt); }
.d-spec-table .spec-label { font-weight: 600; color: var(--text-muted); width: 38%; }

/* OEM / customization grid */
.d-oem-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.d-oem-item { display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; font-size: 14px; font-weight: 500; color: var(--text); }
.d-oem-check { width: 22px; height: 22px; border-radius: 50%; background: var(--success); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: #fff; font-size: 12px; }

/* Applications chips */
.d-app-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.d-app-chip { background: #fff; border: 1px solid var(--border); border-radius: 100px; padding: 10px 20px; font-size: 14px; font-weight: 600; color: var(--secondary); box-shadow: var(--shadow); }
.d-app-chip:hover { border-color: var(--primary); color: var(--primary); }

/* Description */
.d-desc-text { font-size: 15px; line-height: 1.9; color: var(--text); max-width: 860px; }
.d-desc-text p { margin: 0 0 16px; }
.d-desc-img { width: 100%; border-radius: 14px; margin-top: 20px; border: 1px solid var(--border); }

/* Quote form */
.d-form-card { background: #fff; border-radius: 16px; padding: 40px; max-width: 760px; margin: 0 auto; border: 1px solid var(--border); box-shadow: var(--shadow); }
.d-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.d-form-row .full { grid-column: 1 / -1; }
.d-form-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.d-form-field label { font-size: 13px; font-weight: 600; color: var(--secondary); }
.d-form-field input, .d-form-field textarea, .d-form-field select { width: 100%; padding: 12px 14px; border: 2px solid var(--border); border-radius: 10px; font-size: 14px; font-family: 'Inter', sans-serif; color: var(--text); background: #fff; transition: border-color 0.2s; }
.d-form-field input:focus, .d-form-field textarea:focus, .d-form-field select:focus { outline: none; border-color: var(--primary); }
.d-form-field textarea { resize: vertical; min-height: 100px; }
.d-form-field .hint { font-size: 12px; color: var(--text-muted); }
.d-form-success { display: none; text-align: center; padding: 32px; }
.d-form-success.show { display: block; }
.d-form-success .ico { font-size: 52px; margin-bottom: 14px; }
.d-form-success h3 { font-size: 22px; font-weight: 700; color: var(--secondary); margin: 0 0 8px; }
.d-form-success p { color: var(--text-muted); font-size: 15px; margin: 0; }

/* Related products */
.d-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.d-related-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); text-decoration: none; display: flex; flex-direction: column; }
.d-related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.d-related-img { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-alt); }
.d-related-img img { width: 100%; height: 100%; object-fit: contain; }
.d-related-body { padding: 16px 18px; flex: 1; }
.d-related-body h4 { font-size: 15px; font-weight: 700; color: var(--secondary); margin: 0 0 4px; }
.d-related-body p { font-size: 13px; color: var(--text-muted); margin: 0; line-height: 1.5; }

/* Loading skeleton */
.d-loading { text-align: center; padding: 80px 24px; color: var(--text-muted); }
.d-skeleton { background: linear-gradient(90deg, #F1F5F9 25%, #E2E8F0 50%, #F1F5F9 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; border-radius: 8px; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Responsive */
@media (max-width: 960px) {
  .d-layout { grid-template-columns: 1fr; gap: 28px; }
  /* 窄屏：主图在上、缩略图条在下（与阿里移动端一致），主图仍是正方形 */
  .d-gallery { flex-direction: column-reverse; }
  .d-gallery-thumbs { flex-direction: row; flex: none; width: 100%; max-height: none; overflow-x: auto; overflow-y: hidden; }
  /* 缩略图必须给定尺寸：否则 aspect-ratio:1 + flex-shrink:0 会取原图固有宽度，
     每张被撑到 1200px+，缩略图条变成一块 1200px 高的巨块（实测）。 */
  .d-gallery-thumb { flex: 0 0 64px; width: 64px; height: 64px; }
  .d-gallery-main { cursor: default; }
  .d-price-cards { grid-template-columns: 1fr; }
  .d-info { position: static; }
  .d-supplier { grid-template-columns: 1fr; text-align: center; }
  .d-supplier-logo { margin: 0 auto; }
  .d-supplier-side { text-align: center; }
  .d-supplier-stats { justify-content: center; }
  .d-attr-grid { grid-template-columns: 1fr; }
  .d-attr-item:nth-last-child(2) { border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
  .d-form-row { grid-template-columns: 1fr; }
  .d-trust { grid-template-columns: 1fr; }
  .d-section { padding: 40px 16px; }
  .d-form-card { padding: 24px 20px; }
}

/* ---------- P1/P2 visual polish (Alibaba-aligned, blue system) ---------- */
.d-certs { background: #F0F7FF; border: 1px solid #BFDBFE; border-radius: 12px; padding: 14px 16px; }
.d-certs::before { content: 'Certifications'; display: block; font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--primary); margin-bottom: 10px; }
.d-attr-name::before { content: ''; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--primary); margin-right: 8px; vertical-align: middle; }
.d-attr-item { transition: background .15s; }
.d-attr-item:hover { background: var(--primary-light) !important; }
.d-cta .btn-primary { box-shadow: 0 6px 18px rgb(37 99 235 / .35); font-size: 16px; padding: 14px 18px; }