:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --accent: #10b981;
  --border: #e5e7eb;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* header */
.header { background: rgba(255,255,255,.9); backdrop-filter: blur(10px); position: sticky; top:0; z-index:10; border-bottom:1px solid var(--border); }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:60px; }
.logo { display:flex; align-items:center; gap:8px; font-weight:700; font-size:18px; }
.logo-icon { font-size:22px; }
.nav { display:flex; gap:24px; }
.nav-link { color:var(--muted); text-decoration:none; font-size:15px; }
.nav-link:hover { color:var(--text); }

/* hero */
.hero { text-align:center; padding:72px 0 56px; background:linear-gradient(180deg,#eef2ff 0%,var(--bg) 100%); }
.hero-title { font-size:clamp(28px,5vw,44px); font-weight:800; letter-spacing:-.5px; }
.grad { background:linear-gradient(90deg,#4f46e5,#10b981); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero-sub { color:var(--muted); font-size:17px; margin:14px 0 28px; }

/* buttons */
.btn { display:inline-block; padding:10px 22px; border-radius:10px; border:none; cursor:pointer; font-size:15px; text-decoration:none; text-align:center; transition:.2s; }
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-hover); transform:translateY(-1px); }
.btn-lg { padding:14px 32px; font-size:17px; border-radius:12px; }
.btn-block { display:block; width:100%; }
.btn-sm { padding:7px 16px; font-size:14px; border-radius:8px; }

/* section */
.section { padding:48px 0; }
.section-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:24px; flex-wrap:wrap; gap:12px; }
.section h2 { font-size:26px; font-weight:700; }
.search { padding:10px 16px; border:1px solid var(--border); border-radius:10px; font-size:15px; width:240px; outline:none; background:#fff; }
.search:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(79,70,229,.12); }

/* grid */
.grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:20px; }
.loading { grid-column:1/-1; text-align:center; color:var(--muted); padding:60px 0; }
.card {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; box-shadow:var(--shadow); transition:.25s; display:flex; flex-direction:column;
}
.card { cursor:pointer; }
.card:hover { transform:translateY(-4px); box-shadow:0 8px 30px rgba(0,0,0,.1); }
.card-img { width:100%; aspect-ratio:16/10; object-fit:cover; background:#f0f1f5; display:block; }
.card-img-empty { background:linear-gradient(135deg,#eef2ff,#f0fdf4); }
.card-body { padding:16px; display:flex; flex-direction:column; gap:8px; flex:1; }
.card-name { font-size:17px; font-weight:600; }
.card-desc { font-size:13px; color:var(--muted); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-foot { display:flex; align-items:center; justify-content:space-between; margin-top:auto; }
.variant { border-top:1px dashed var(--border); padding-top:10px; margin-top:4px; }
.variant-name { font-size:13px; color:var(--muted); margin-bottom:4px; }
.price-row { display:flex; align-items:baseline; gap:8px; }
.price { font-size:22px; font-weight:800; color:var(--primary); }
.price::before { content:"¥"; font-size:14px; font-weight:600; }
.price-orig { font-size:13px; color:var(--muted); text-decoration:line-through; }
.badge { display:inline-block; font-size:11px; padding:2px 8px; border-radius:20px; background:#ecfdf5; color:#059669; font-weight:600; }
.card .btn { margin-top:auto; }

/* modal 商品详情 */
#detailModal.show .modal-mask { display:block; }
.modal-mask { display:none; position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:100; }
.modal {
  position:fixed; left:50%; top:50%; transform:translate(-50%,-50%); z-index:101;
  width:min(92vw,460px); max-height:88vh; overflow-y:auto;
  background:#fff; border-radius:18px; box-shadow:0 20px 60px rgba(0,0,0,.25);
}
.modal-close { position:absolute; right:14px; top:14px; width:32px; height:32px; border:none; background:rgba(0,0,0,.35); color:#fff; border-radius:50%; cursor:pointer; font-size:16px; }
.modal-img { width:100%; aspect-ratio:16/10; object-fit:cover; display:block; background:#f0f1f5; }
.modal-body { padding:20px 22px 24px; }
.modal-title { font-size:22px; font-weight:700; margin-bottom:6px; }
.modal-desc { font-size:14px; color:var(--muted); margin-bottom:14px; }
.modal-price { font-size:30px; font-weight:800; color:var(--primary); margin-bottom:16px; }
.modal-price::before { content:"¥"; font-size:18px; font-weight:700; }
.modal-section-label { font-size:13px; color:var(--muted); margin-bottom:8px; font-weight:600; }
.spec-list { display:flex; flex-direction:column; gap:10px; margin-bottom:16px; }
.spec {
  display:flex; align-items:center; justify-content:space-between;
  border:1.5px solid var(--border); border-radius:10px; padding:12px 14px; cursor:pointer; transition:.15s;
}
.spec input { display:none; }
.spec b { color:var(--primary); font-size:16px; }
.spec.active { border-color:var(--primary); background:#f5f4ff; }
.contact-input { width:100%; padding:12px 14px; border:1px solid var(--border); border-radius:10px; font-size:15px; outline:none; margin-bottom:16px; }
.contact-input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(79,70,229,.12); }
.modal-trust { display:flex; justify-content:space-around; margin-top:14px; font-size:13px; color:var(--muted); }
.modal-trust span { color:#059669; }

/* faq */
.faq-section { background:#fff; border-top:1px solid var(--border); }
.faq { border:1px solid var(--border); border-radius:10px; padding:14px 18px; margin-bottom:10px; background:var(--bg); }
.faq summary { font-weight:600; cursor:pointer; }
.faq p { margin-top:8px; color:var(--muted); }

/* footer */
.footer { padding:32px 0; text-align:center; color:var(--muted); font-size:14px; border-top:1px solid var(--border); }

@media (max-width:600px){
  .nav { gap:14px; }
  .search { width:100%; }
  .section-head { flex-direction:column; align-items:stretch; }
}