:root{
  --ink:#15222f; --dim:#6d7c8a; --line:#e5eaee; --soft:#f7f9fb;
  --acc:#0b6c8a; --acc2:#0a5468; --gold:#b5893b;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:var(--ink);
  font:16px/1.62 -apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.dim{color:var(--dim);font-size:14px}

/* header */
.hd{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}
.hd-in{display:flex;align-items:center;gap:26px;height:66px}
.brand{display:flex;align-items:center;gap:9px;color:var(--acc);font-weight:700;letter-spacing:.02em}
.brand em{display:block;font-style:normal;font-weight:400;font-size:11px;color:var(--dim);letter-spacing:.12em;text-transform:uppercase}
.topnav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.mi{position:relative}
.mi>a{display:block;padding:9px 12px;font-size:14px;border-radius:6px}
.mi:hover>a{background:var(--soft);color:var(--acc)}
.mi ul{position:absolute;top:100%;left:0;min-width:216px;margin:0;padding:6px;list-style:none;
  background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(18,38,54,.10);
  display:none}
.mi:hover ul{display:block}
.mi ul a{display:block;padding:7px 10px;font-size:13.5px;border-radius:6px;color:#33465a}
.mi ul a:hover{background:var(--soft);color:var(--acc)}

/* crumbs */
.crumbs{border-bottom:1px solid var(--line);background:var(--soft)}
.crumbs .wrap{padding:11px 22px;font-size:13px;color:var(--dim)}
.crumbs a:hover{color:var(--acc)}

/* main */
main{padding:34px 22px 64px}
h1{font-size:30px;line-height:1.25;margin:0 0 12px;letter-spacing:-.01em}
h2{font-size:19px;margin:38px 0 14px;letter-spacing:-.01em}
.lead{font-size:16.5px;color:#3d4f60;max-width:76ch;margin:0 0 8px}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-block;padding:7px 14px;border:1px solid var(--line);border-radius:999px;
  font-size:13.5px;background:#fff;color:#33465a}
.chip:hover{border-color:var(--acc);color:var(--acc)}
.chip.on{background:var(--acc);border-color:var(--acc);color:#fff}
.chip.static{cursor:default}

/* grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(212px,1fr));gap:16px;margin-top:6px}
.card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;
  transition:box-shadow .18s ease, transform .18s ease, border-color .18s ease}
.card:hover{box-shadow:0 10px 26px rgba(18,38,54,.10);transform:translateY(-2px);border-color:#cfd8e0}
.ph{aspect-ratio:1/1;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
.ph img{width:100%;height:100%;object-fit:contain}
.noimg{color:#cfd8e0;font-weight:700;font-size:22px;letter-spacing:.06em}
.cb{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px 0}
.m{font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.01em}
.c{font-size:11px;color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:2px 8px;white-space:nowrap}
.cs{padding:4px 12px 12px;font-size:12px;color:var(--dim)}

/* hero */
.hero{padding:22px 0 6px;border-bottom:1px solid var(--line);margin-bottom:6px}
.hero h1{font-size:38px;max-width:20ch}
.hero .lead{font-size:17px;margin-bottom:22px}
.hero-btns{display:flex;gap:12px;margin-bottom:30px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 22px;border-radius:8px;background:var(--acc);color:#fff;font-size:14.5px;font-weight:600}
.btn:hover{background:var(--acc2)}
.btn.ghost{background:#fff;color:var(--acc);border:1px solid var(--acc)}
.btn.ghost:hover{background:var(--soft)}

/* cat grid (home) */
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.catcard{display:flex;flex-direction:column;justify-content:space-between;min-height:104px;
  padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--soft)}
.catcard:hover{border-color:var(--acc);background:#fff}
.ce{font-size:16.5px;font-weight:600}
.cn{font-size:13px;color:var(--dim);margin-top:14px}

/* cta */
.cta{margin-top:46px;padding:28px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}
.cta h2{margin:0 0 8px}
.cta p{color:#3d4f60;margin:0 0 18px;max-width:70ch}

/* footer */
.ft{border-top:1px solid var(--line);background:var(--soft);margin-top:20px}
.ft-in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:26px;padding:34px 22px}
.ft-brand{font-weight:700;color:var(--acc);margin-bottom:8px}
.ft p{margin:0 0 6px;font-size:13.5px;color:#4a5c6d}
.ft-cats{display:flex;flex-direction:column;gap:6px;font-size:13.5px}
.ft-cats a:hover{color:var(--acc)}
.ft-note a{color:var(--acc)}
@media (max-width:820px){
  .hd-in{height:auto;flex-direction:column;align-items:flex-start;padding:12px 0}
  .topnav{margin-left:0}
  .mi ul{display:none!important}
  .hero h1{font-size:28px}
  .ft-in{grid-template-columns:1fr}
}

/* ---------- product detail ---------- */
.pd{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);gap:42px;align-items:start}
.pd-media{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;position:relative}
.pd-media img{width:100%;height:auto}
.pd-media .noimg{display:flex;align-items:center;justify-content:center;aspect-ratio:1/1;font-size:34px}
.pd-badge{position:absolute;top:12px;left:12px;background:rgba(21,34,47,.86);color:#fff;font-size:11.5px;
  letter-spacing:.06em;padding:5px 11px;border-radius:6px;font-variant-numeric:tabular-nums}
.pd h1{font-size:25px;margin:0 0 6px;font-variant-numeric:tabular-nums}
.pd-sub{color:var(--dim);font-size:14px;margin:0 0 20px}
.specwrap{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:22px}
.spec{width:100%;border-collapse:collapse;font-size:14px}
.spec th,.spec td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line)}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.spec th{color:var(--dim);font-weight:500;width:40%;white-space:nowrap;background:#fcfdfe}
.spec td{font-variant-numeric:tabular-nums}
.pd-btns{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.tag{display:inline-block;padding:4px 11px;border:1px solid var(--line);border-radius:999px;
  font-size:12px;color:var(--dim);background:var(--soft);margin:0 6px 6px 0}
.about{font-size:15.5px;line-height:1.78;color:#2b3b4a;max-width:80ch}
.note{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:15px 18px;
  font-size:13.5px;color:#4a5c6d;max-width:80ch;margin-top:20px}
.note strong{color:var(--ink)}
@media (max-width:860px){.pd{grid-template-columns:1fr;gap:24px}.pd h1{font-size:21px}}