:root{
  --bg1:#f6f8fb;
  --bg2:#eef2f7;
  --card:#ffffff;
  --muted:#6b7280;
  --text:#111827;
  --line:rgba(17,24,39,.10);
  --shadow: 0 10px 30px rgba(17,24,39,.08);
  --radius:16px;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color:var(--text);
  background: linear-gradient(180deg, var(--bg1) 0%, var(--bg2) 100%);
}

a{color:inherit; text-decoration:none;}
.container{max-width:1200px; margin:0 auto; padding:24px;}
header{
  position:sticky; top:0; z-index:10;
  backdrop-filter: blur(10px);
  background: rgba(246,248,251,.75);
  border-bottom:1px solid var(--line);
}

.nav{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; padding:14px 24px; max-width:1200px; margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:12px; min-width:240px;
}
.brand img{
  width:44px; height:44px; border-radius:12px; background:#fff;
  border:1px solid var(--line);
}
.brand .title{font-weight:700; letter-spacing:.2px;}
.brand .sub{font-size:12px; color:var(--muted); margin-top:2px;}

.nav-actions{display:flex; gap:10px; align-items:center; flex-wrap:wrap;}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.75);
  box-shadow: 0 6px 18px rgba(17,24,39,.06);
  font-weight:600;
}
.btn:hover{transform: translateY(-1px); transition:.15s;}
.btn.primary{
  background: #111827;
  color:#fff;
  border-color:#111827;
}
.btn.ghost{background:transparent;}

.hero{
  display:grid;
  grid-template-columns: 1.25fr .75fr;
  gap:18px;
  margin-top:18px;
}
.card{
  background: var(--card);
  border:1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card.pad{padding:22px;}
.kicker{
  display:inline-block;
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.h1{font-size:34px; line-height:1.12; margin:10px 0 12px;}
.p{color:#374151; line-height:1.6; margin:0 0 12px;}
.list{margin:12px 0 0; padding-left:18px; color:#374151; line-height:1.7;}
.badges{display:flex; gap:10px; flex-wrap:wrap; margin-top:14px;}
.badge{
  display:inline-flex; align-items:center;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  color:#111827;
  background: rgba(255,255,255,.65);
  font-weight:600;
  font-size:13px;
}

.section-title{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap:12px; margin:18px 0 10px;
}
.section-title h2{margin:0; font-size:26px;}
.section-title .hint{color:var(--muted); font-size:13px;}

.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:18px;
}
@media (min-width: 980px){
  .grid{
    grid-template-columns: 1fr 360px;
    align-items:start;
  }
}
.catalog{
  display:grid;
  grid-template-columns: repeat(1, minmax(0,1fr));
  gap:14px;
}
@media (min-width: 680px){
  .catalog{grid-template-columns: repeat(2, minmax(0,1fr));}
}
@media (min-width: 1020px){
  .catalog{grid-template-columns: repeat(3, minmax(0,1fr));}
}

.product{
  overflow:hidden;
}
.product .imgwrap{
  width:100%;
  height:220px;            /* 统一高度 */
  background: #f3f5f8;
  border-bottom:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  padding:12px;
}
.product img{
  width:100%;
  height:100%;
  object-fit: contain;     /* ✅ 不裁切 */
  display:block;
}
.product .body{padding:14px 14px 16px;}
.model{font-weight:800; letter-spacing:.3px;}
.meta{color:var(--muted); font-size:13px; margin-top:4px;}
.price{
  margin-top:10px;
  font-size:18px;
  font-weight:900;
}
.actions{display:flex; gap:10px; margin-top:12px; flex-wrap:wrap;}
.actions .btn{padding:9px 12px;}

.sticky{
  position: sticky;
  top: 88px;
}
.quote{
  padding:18px;
}
.quote h3{margin:0 0 12px; font-size:18px;}
.quote .qrow{
  display:grid;
  grid-template-columns: 1fr;
  gap:10px;
}
.qbox{
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  background: rgba(255,255,255,.7);
}
.qbox .t{font-weight:800; margin-bottom:6px;}
.qbox .d{color:#374151; line-height:1.55; font-size:13px;}
.qbox code{
  display:block;
  margin-top:8px;
  padding:10px 10px;
  background:#0b1220;
  color:#e5e7eb;
  border-radius:12px;
  overflow:auto;
  font-size:12px;
}
.quote .cta{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px;
  margin-top:12px;
}
.quote .cta .btn{width:100%;}
.small{color:var(--muted); font-size:12px; line-height:1.5; margin-top:10px;}

footer{
  margin-top:26px;
  padding:18px 0 40px;
  color:var(--muted);
  text-align:center;
  font-size:13px;
}