:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --line:#e5e7eb;
  --accent:#111827;
  --accent2:#2563eb;
  --radius:16px;
  --shadow: 0 12px 30px rgba(15,23,42,.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.nav{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.nav .inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand .dot{width:10px;height:10px;border-radius:999px;background:var(--accent2)}
.menu{display:flex;gap:14px;align-items:center}
.menu a{color:var(--muted);font-weight:600;font-size:14px}
.menu a:hover{color:var(--text)}
.right{display:flex;align-items:center;gap:10px}
.badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:8px 10px;border-radius:12px;background:#fff;font-weight:700}
.badge small{font-weight:700;color:var(--muted)}
.hero{background:linear-gradient(180deg,#111827 0%, #0b1220 100%);color:#fff}
.hero .inner{padding:64px 0;text-align:center}
.hero h1{margin:0;font-size:44px;letter-spacing:-.02em}
.hero p{margin:10px 0 0;color:rgba(255,255,255,.75)}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;padding:28px 0}
@media (max-width:980px){.grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:720px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:420px){.grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.thumb{aspect-ratio:3/2;background:#e2e8f0;display:flex;align-items:center;justify-content:center;color:#475569;font-weight:800}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.card .body{padding:14px}
.title{font-weight:800}
.price{margin-top:6px;display:flex;gap:10px;align-items:baseline}
.price .now{font-weight:900}
.price .was{color:var(--muted);text-decoration:line-through;font-size:13px}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:6px 10px;border-radius:999px;color:var(--muted);font-size:12px;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);padding:10px 12px;border-radius:12px;background:#fff;font-weight:800;cursor:pointer}
.btn.primary{background:var(--accent2);border-color:var(--accent2);color:#fff}
.btn:hover{filter:brightness(.98)}
.row{display:flex;gap:14px;flex-wrap:wrap}
.footer{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:14px}
.footer .inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer a{color:var(--muted);font-weight:700}
.footer a:hover{color:var(--text)}
.page{padding:28px 0}
.h1{font-size:28px;margin:0 0 8px}
.muted{color:var(--muted)}
.searchbox{display:flex;gap:10px}
.searchbox input{width:260px;max-width:60vw;border:1px solid var(--line);border-radius:12px;padding:10px 12px;outline:none}
.searchbox input:focus{border-color:#c7d2fe;box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.product{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
@media (max-width:820px){.product{grid-template-columns:1fr}}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.hr{height:1px;background:var(--line);margin:14px 0}

@media (max-width: 720px){
  .nav .inner{flex-wrap:wrap}
  .menu{flex-wrap:wrap; gap:10px}
  .right{width:100%; justify-content:space-between}
  .searchbox{flex:1}
  .searchbox input{width:100%; max-width:100%}
}
@media (max-width: 420px){
  .badge{width:100%; justify-content:center}
}