:root{
  --ink:#1a1a1a; --muted:#6b7280; --line:#e7e7e7; --bg:#ffffff;
  --accent:#000000; --soft:#f7f7f7; --price:#111;
  --maxw:1500px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.4}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:24px;padding:10px 24px}
.logo img{height:40px;width:auto;object-fit:contain}
.logo-text{font-weight:700;font-size:20px;letter-spacing:.5px}
.search-wrap{flex:1;position:relative;display:flex;align-items:center;max-width:760px;margin:0 auto}
.search-wrap .search-ic{position:absolute;left:14px;color:#9aa0a6}
#search{width:100%;padding:11px 16px 11px 42px;border:1px solid var(--line);border-radius:24px;background:#fff;font-size:14px;outline:none}
#search:focus{border-color:#c9c9c9}
.header-actions{display:flex;align-items:center;gap:14px}
.hicon{background:none;border:none;cursor:pointer;color:#333;padding:4px;display:flex}
.catnav{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;gap:6px 26px;padding:10px 24px;border-top:1px solid #f0f0f0;font-size:14px}
.catnav a{color:#333;padding:4px 2px;cursor:pointer;white-space:nowrap}
.catnav a:hover,.catnav a.active{color:#000;font-weight:600;border-bottom:2px solid #000}

/* Layout */
.layout{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:260px 1fr;gap:28px;padding:22px 24px 60px}
.sidebar{font-size:14px}
.side-block{border-bottom:1px solid var(--line);padding:16px 0}
.side-block:first-child{padding-top:0}
.side-title{display:flex;justify-content:space-between;align-items:center;font-weight:600;margin-bottom:10px}
.sortsel{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:6px;background:#fff;font-size:14px}
.cat-search{width:100%;padding:8px 32px 8px 10px;border:1px solid var(--line);border-radius:6px;margin-bottom:10px;font-size:13px}
.cat-list{display:flex;flex-direction:column;gap:8px;max-height:260px;overflow:auto}
.cat-list label{display:flex;align-items:center;gap:8px;cursor:pointer;color:#444}
.cat-list input{accent-color:#000}
.price-row{display:flex;justify-content:space-between;color:#444;margin-top:8px;font-size:13px}
.range{width:100%;accent-color:#000}

/* Grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px 18px}
.card{cursor:pointer;display:flex;flex-direction:column}
.card-img{aspect-ratio:3/4;background:var(--soft);overflow:hidden;border-radius:2px}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-img img{transform:scale(1.04)}
.card-name{margin:10px 4px 2px;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-price{margin:0 4px;font-weight:700;color:var(--price);font-size:15px}
.result-meta{grid-column:1/-1;color:var(--muted);font-size:13px;margin-bottom:2px}

/* Pagination */
.pager{grid-column:1/-1;display:flex;justify-content:center;gap:6px;margin-top:30px;flex-wrap:wrap}
.pager button{min-width:38px;height:38px;border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;font-size:14px}
.pager button.active{background:#000;color:#fff;border-color:#000}
.pager button:disabled{opacity:.4;cursor:default}

/* Detail */
.detail{max-width:1200px;margin:0 auto;padding:26px 24px 70px;display:grid;grid-template-columns:1fr 1fr;gap:46px}
.detail-gallery .main-img{width:100%;aspect-ratio:3/4;object-fit:cover;background:var(--soft);border-radius:3px}
.detail-info h1{font-size:24px;margin:0 0 4px;font-weight:600}
.detail-code{color:var(--muted);font-size:13px;margin-bottom:18px}
.detail-price{font-size:26px;font-weight:700;margin:6px 0 4px}
.detail-price small{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-top:4px}
.detail-add{margin:22px 0;background:#000;color:#fff;border:none;padding:14px 26px;border-radius:6px;font-size:15px;cursor:pointer;width:100%;max-width:340px}
.detail-section{border-top:1px solid var(--line);padding-top:16px;margin-top:18px}
.detail-section h3{font-size:15px;margin:0 0 8px}
.detail-section p{color:#444;margin:0;line-height:1.6}
.back-link{display:inline-flex;align-items:center;gap:6px;color:#555;margin:6px 24px;cursor:pointer}
.back-link:hover{color:#000}

.loading{padding:80px 24px;text-align:center;color:var(--muted)}
.site-footer{border-top:1px solid var(--line);background:#fafafa;margin-top:30px}
.footer-cols{max-width:var(--maxw);margin:0 auto;display:flex;gap:80px;padding:34px 24px;flex-wrap:wrap}
.footer-cols h4{margin:0 0 12px;font-size:15px}
.footer-cols a{display:block;color:#555;margin-bottom:8px;font-size:14px}
.footer-note{max-width:var(--maxw);margin:0 auto;padding:0 24px 30px;color:#9aa0a6;font-size:12px}

@media(max-width:1100px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:860px){
  .layout{grid-template-columns:1fr}
  .sidebar{display:none}
  .grid{grid-template-columns:repeat(2,1fr)}
  .detail{grid-template-columns:1fr;gap:24px}
  .header-inner{flex-wrap:wrap}
}
@media(max-width:520px){.grid{grid-template-columns:repeat(2,1fr);gap:14px}}