/* ══════════════════════════════════════════════════════════
   紳新國際商品展示站 —— 極簡黑白灰設計系統
   仿 demo.vercel.store 版型：大量留白、細邊框卡片、無購物車
   ══════════════════════════════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#FFFFFF;
  --surface:#FFFFFF;
  --surface-2:#F7F8F9;
  --ink:#111111;
  --ink-2:#2B2F36;
  --muted:#565B63;
  --dim:#8B9198;
  --faint:#B9BFC6;
  --line:#E4E7EB;
  --line-2:#D3D8DE;
  --accent:#d0021b;
  --accent-soft:rgba(208,2,27,.07);
  --line-green:#06C755;
  --shopee-orange:#EE4D2D;

  --sans:-apple-system,BlinkMacSystemFont,"PingFang TC","Microsoft JhengHei",sans-serif;

  --maxw:1240px;
  --radius:8px;
  --radius-s:4px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-weight:400;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;background:none;border:none}
img{max-width:100%;display:block}
::selection{background:var(--ink);color:#fff}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,4vw,32px)}

/* ══ NAV ══ */
#nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{font-weight:700;font-size:16px;letter-spacing:.01em}
.brand-en{color:var(--dim);font-weight:400;font-size:12.5px;letter-spacing:.04em;margin-left:4px}
.navlinks{display:flex;align-items:center;gap:20px;margin-left:auto;font-size:14px;color:var(--muted)}
.navlinks a{transition:color .2s}
.navlinks a:hover{color:var(--ink)}
.nav-cta{color:var(--line-green)!important;font-weight:600}

/* ══ SEARCH BAR ══ */
#search-bar{position:sticky;top:64px;z-index:90;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.search-inner{position:relative;padding-top:12px;padding-bottom:12px}
.search-box{position:relative;display:flex;align-items:center}
.search-icon{position:absolute;left:14px;color:var(--dim);pointer-events:none;transition:color .2s var(--ease)}
#search-input{width:100%;padding:11px 40px 11px 40px;border:1px solid var(--line-2);border-radius:100px;font-size:14.5px;color:var(--ink);background:var(--surface-2);transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease)}
#search-input::placeholder{color:var(--dim)}
#search-input:focus{outline:none;border-color:var(--ink);background:var(--surface);box-shadow:0 0 0 3px rgba(17,17,17,.06)}
.search-box:focus-within .search-icon{color:var(--ink)}
.search-clear{position:absolute;right:10px;width:26px;height:26px;display:flex;align-items:center;justify-content:center;font-size:19px;line-height:1;color:var(--faint);border-radius:50%;transition:.15s var(--ease)}
.search-clear:hover{background:var(--line);color:var(--ink)}
.search-clear[hidden],.search-results[hidden]{display:none}

.search-results{position:absolute;top:calc(100% + 4px);left:clamp(20px,4vw,32px);right:clamp(20px,4vw,32px);max-height:75vh;overflow-y:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 20px 44px -20px rgba(17,17,17,.28);z-index:95;opacity:0;transform:translateY(4px);transition:opacity .16s var(--ease),transform .16s var(--ease)}
.search-results.is-open{opacity:1;transform:translateY(0)}
.search-results::-webkit-scrollbar{width:8px}
.search-results::-webkit-scrollbar-track{background:transparent}
.search-results::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:100px}

.sr-summary{padding:9px 14px 7px;font-size:12px;color:var(--dim);border-bottom:1px solid var(--line)}

.sr-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line);border-left:2px solid transparent;transition:background .12s var(--ease)}
.sr-item:last-child{border-bottom:none}
.sr-item:hover,.sr-item.is-active{background:var(--surface-2)}
.sr-item.is-active{border-left-color:var(--ink)}
.sr-thumb{width:54px;height:54px;flex:none;border-radius:var(--radius-s);overflow:hidden;background:var(--surface-2);border:1px solid var(--line)}
.sr-thumb img{width:100%;height:100%;object-fit:cover}
.sr-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}
.sr-name{font-size:14px;line-height:1.4;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sr-name mark{background:none;color:var(--ink);font-weight:700;text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:2px}
.sr-meta{display:flex;align-items:center;flex-wrap:wrap;gap:5px;font-size:12px;color:var(--dim)}
.sr-meta mark{background:none;color:var(--ink);font-weight:700}
.sr-sku-tag{display:inline-flex;align-items:center;padding:1.5px 6px;border-radius:100px;background:var(--surface-2);color:var(--muted);font-size:10.5px;font-weight:600;letter-spacing:.02em}
.sr-price{font-size:13.5px;font-weight:700;color:var(--ink);white-space:nowrap;margin-left:10px}

.sr-empty{padding:28px 20px;text-align:center;color:var(--dim);font-size:14px;display:flex;flex-direction:column;align-items:center;gap:10px}
.sr-empty svg{color:var(--faint)}
.sr-empty-text b{color:var(--ink-2);font-weight:600}

.sr-suggest{padding:16px 18px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.sr-suggest-msg{font-size:14px;color:var(--dim)}
.sr-suggest-chip{display:inline-flex;align-items:center;gap:5px;padding:8px 16px;border:1px solid var(--line-2);border-radius:100px;font-size:13.5px;color:var(--ink);background:var(--surface);transition:.15s var(--ease)}
.sr-suggest-chip:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.sr-suggest-chip b{font-weight:700}

.sr-hint{padding:9px 14px;font-size:11.5px;color:var(--faint);border-top:1px solid var(--line);text-align:center}

@media(max-width:640px){
  #search-bar{top:64px}
  #search-input{font-size:16px}
  .search-results{left:8px;right:8px;max-height:80vh}
  .sr-item{padding:9px 10px;gap:10px}
  .sr-thumb{width:48px;height:48px}
  .sr-name{font-size:13.5px}
}

/* ══ APP SHELL ══ */
#app{padding-block:28px 80px;min-height:60vh}

/* ══ BREADCRUMB ══ */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--dim);margin-bottom:22px}
.crumbs a{color:var(--muted);transition:color .2s}
.crumbs a:hover{color:var(--ink)}
.crumbs .sep{color:var(--faint)}
.crumbs .current{color:var(--ink)}

/* ══ LISTING LAYOUT ══ */
.listing{display:grid;grid-template-columns:220px 1fr;gap:36px;align-items:start}
@media(max-width:768px){.listing{grid-template-columns:1fr;gap:20px}}

/* ── sidebar (desktop) ── */
.sidebar{position:sticky;top:88px}
.sidebar-title{font-size:12px;letter-spacing:.08em;color:var(--dim);text-transform:uppercase;margin-bottom:12px}
.cat-list{display:flex;flex-direction:column;gap:2px}
.cat-link{display:block;padding:8px 10px;border-radius:var(--radius-s);font-size:14.5px;color:var(--ink);transition:background .2s,color .2s}
.cat-link:hover{background:var(--surface-2)}
.cat-link.active{color:var(--accent);background:var(--accent-soft);font-weight:600}

/* ── mobile category chips ── */
.cat-chips{display:none}
@media(max-width:768px){
  .sidebar{display:none}
  .cat-chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;margin-bottom:8px;-webkit-overflow-scrolling:touch}
  .cat-chips::-webkit-scrollbar{display:none}
  .chip-link{flex:none;padding:8px 16px;border:1px solid var(--line-2);border-radius:100px;font-size:13.5px;color:var(--ink);white-space:nowrap;transition:.2s var(--ease)}
  .chip-link.active{color:#fff;background:var(--accent);border-color:var(--accent)}
}

/* ── listing header (title + sort) ── */
.listing-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.listing-title{font-size:clamp(20px,3vw,26px);font-weight:700}
.listing-count{font-size:13px;color:var(--dim);margin-left:10px;font-weight:400}
.sort-select{border:1px solid var(--line-2);border-radius:var(--radius-s);padding:8px 12px;font-size:13.5px;color:var(--ink);background:var(--surface);appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23565B63' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;background-size:16px;padding-right:32px;cursor:pointer}
.sort-select:focus{outline:1px solid var(--ink)}

/* ══ PRODUCT GRID ══ */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1024px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){.grid{grid-template-columns:repeat(2,1fr);gap:14px}}

.pcard{position:relative;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .25s var(--ease),border-color .25s var(--ease);display:flex;flex-direction:column}
.pcard:hover{border-color:var(--line-2);box-shadow:0 14px 34px -22px rgba(17,17,17,.35)}
.pcard-media{position:relative;aspect-ratio:1/1;background:var(--surface-2);overflow:hidden}
.pcard-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.pcard:hover .pcard-media img{transform:scale(1.04)}
.badge{position:absolute;top:10px;right:10px;font-size:11.5px;font-weight:700;letter-spacing:.02em;padding:4px 9px;border-radius:100px;color:#fff;z-index:2}
.badge.sale{background:var(--accent)}
.badge.new{background:var(--ink)}
.badge.oos{background:var(--dim)}
/* 詳情頁庫存徽章：有貨/補貨中，隨 variant 切換即時更新 */
.stock-badge{font-size:12px;font-weight:700;padding:3px 10px;border-radius:100px;white-space:nowrap}
.stock-badge.in{color:#177245;background:rgba(23,114,69,.1)}
.stock-badge.out{color:var(--dim);background:var(--surface-2)}
.pcard-body{padding:14px 14px 16px;display:flex;flex-direction:column;gap:4px;flex:1}
.pcard-brand{font-size:11.5px;letter-spacing:.06em;color:var(--dim);text-transform:uppercase}
.pcard-name{font-size:14.5px;font-weight:500;line-height:1.5;color:var(--ink)}
.pcard-price{margin-top:auto;padding-top:8px;display:flex;align-items:baseline;gap:8px}
.price-now{font-size:15.5px;font-weight:700}
.price-orig{font-size:13px;color:var(--faint);text-decoration:line-through}

.empty-state{padding:60px 0;text-align:center;color:var(--dim);font-size:15px}

/* ══ PRODUCT DETAIL ══ */
.pd-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media(max-width:860px){.pd-layout{grid-template-columns:1fr;gap:28px}}

.pd-media{}
.pd-main-img{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface-2);aspect-ratio:1/1}
.pd-main-img img{width:100%;height:100%;object-fit:cover}
.pd-thumbs{display:flex;gap:10px;margin-top:12px}
.pd-thumb{width:64px;height:64px;border:1px solid var(--line);border-radius:var(--radius-s);overflow:hidden;background:var(--surface-2);opacity:.7;transition:.2s var(--ease)}
.pd-thumb img{width:100%;height:100%;object-fit:cover}
.pd-thumb:hover{opacity:1}
.pd-thumb.active{opacity:1;border-color:var(--ink);border-width:2px}

.pd-info{}
.pd-brand{font-size:12.5px;letter-spacing:.08em;color:var(--dim);text-transform:uppercase;margin-bottom:8px}
.pd-name{font-size:clamp(21px,3vw,28px);font-weight:700;line-height:1.4;margin-bottom:14px}
.pd-price-row{display:flex;align-items:baseline;gap:12px;margin-bottom:20px}
.pd-price-now{font-size:24px;font-weight:700}
.pd-price-orig{font-size:16px;color:var(--faint);text-decoration:line-through}

.pd-variants{margin-bottom:20px}
.pd-variants-label{font-size:12.5px;color:var(--muted);margin-bottom:8px}
.variant-list{display:flex;flex-wrap:wrap;gap:8px}
.variant-btn{padding:8px 16px;border:1px solid var(--line-2);border-radius:var(--radius-s);font-size:13.5px;color:var(--ink);transition:.2s var(--ease)}
.variant-btn:hover{border-color:var(--ink)}
.variant-btn.selected{background:var(--ink);color:#fff;border-color:var(--ink)}

.pd-desc{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-bottom:26px}
/* 國際條碼行（僅合法 EAN 才顯示，2026-07-16 新增，v42）：跟規格行同樣式、
   縮小行距不搶版面；沒有 barcode 的商品/variant 靠 [hidden] 整行不渲染。 */
#pd-barcode{margin-top:-18px;font-size:13px}
#pd-barcode[hidden]{display:none}

/* 對應替換膠條（雨刷類商品才帶 replacement_rubber 欄位） */
.pd-rubber-ref{font-size:13.5px;color:var(--ink-2);margin:-14px 0 20px}
.pd-rubber-ref a{color:var(--ink);text-decoration:underline;font-weight:600}
.pd-rubber-ref a:hover{color:var(--shopee-orange)}

.pd-cta{display:flex;gap:12px;margin-bottom:16px}
/* 系列介紹（series_intro 非空才渲染，人工文案接口） */
.pd-series{margin-top:26px;padding-top:22px;border-top:1px solid var(--line-2)}
.pd-series-title{font-size:13px;font-weight:700;letter-spacing:.05em;color:var(--dim);margin-bottom:10px}
.pd-series-body{font-size:14.5px;color:var(--ink-2);line-height:1.85;white-space:pre-line}
@media(max-width:520px){.pd-cta{flex-direction:column;gap:12px}}
.cta-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 20px;border-radius:var(--radius-s);font-size:15px;font-weight:700;color:#fff;transition:filter .2s,transform .2s var(--ease)}
.cta-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.cta-line{background:var(--line-green)}
.cta-shopee{background:var(--shopee-orange)}

/* ══ RELATED PRODUCTS ══ */
.related{margin-top:64px;padding-top:36px;border-top:1px solid var(--line)}
.related-title{font-size:19px;font-weight:700;margin-bottom:16px}
.related-scroll{display:flex;gap:16px;overflow-x:auto;padding-bottom:8px;-webkit-overflow-scrolling:touch}
.related-scroll::-webkit-scrollbar{height:6px}
.related-scroll::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:100px}
.related-scroll .pcard{flex:none;width:220px}
@media(max-width:520px){.related-scroll .pcard{width:160px}}