/* 卡密商城 · 前台极简样式 */
:root{
  --bg:#f7f8fa; --card:#fff; --fg:#1f2937; --muted:#6b7280; --line:#e5e7eb;
  --brand:#2563eb; --brand-dark:#1d4ed8; --brand-weak:#eff6ff;
  --ok:#059669; --ok-weak:#ecfdf5; --warn:#d97706; --warn-weak:#fffbeb;
  --danger:#dc2626; --danger-weak:#fef2f2; --radius:10px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 4px 14px rgba(16,24,40,.04);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--fg);font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.35;font-weight:650}
h1{font-size:24px}h2{font-size:19px}h3{font-size:16px}
p{margin:0 0 12px}
hr{border:0;border-top:1px solid var(--line);margin:20px 0}

.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-head .inner{max-width:1080px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.logo{font-size:18px;font-weight:700;color:var(--fg);letter-spacing:.5px;white-space:nowrap}
.logo:hover{text-decoration:none;color:var(--brand)}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:0}
.nav{display:flex;align-items:center;gap:18px;margin-left:auto;flex-wrap:wrap;font-size:14px}
.nav a{color:#374151;white-space:nowrap}
.nav a:hover{color:var(--brand);text-decoration:none}
.nav .cart-count{display:inline-block;min-width:18px;padding:0 5px;border-radius:9px;background:var(--brand);color:#fff;font-size:11px;text-align:center;line-height:18px}
.site-main{padding:28px 0 56px;min-height:60vh}
.site-foot{border-top:1px solid var(--line);background:#fff;padding:22px 0;color:var(--muted);font-size:13px;text-align:center}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:18px}
.card.tight{padding:14px}
.card h2{margin-bottom:16px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.card-head h2{margin:0}

.hero{background:linear-gradient(135deg,#eff6ff,#f8fafc);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;margin-bottom:22px}
.hero h1{font-size:26px;margin-bottom:6px}
.hero p{color:var(--muted);margin:0}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 16px;border:1px solid var(--line);background:#fff;color:var(--fg);border-radius:8px;font-size:14px;font-family:inherit;cursor:pointer;line-height:1.4;text-decoration:none;transition:.15s}
.btn:hover{border-color:#cbd5e1;background:#f9fafb;text-decoration:none}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.btn-ghost{background:transparent;border-color:transparent;color:var(--brand);padding:6px 8px}
.btn-danger{color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:var(--danger-weak)}
.btn-sm{padding:5px 10px;font-size:13px}
.btn-lg{padding:12px 24px;font-size:16px}
.btn-block{width:100%}
.btn:disabled,.btn.disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

.alert{padding:11px 14px;border-radius:8px;margin-bottom:16px;font-size:14px;border:1px solid transparent}
.alert-ok{background:var(--ok-weak);border-color:#a7f3d0;color:#065f46}
.alert-err{background:var(--danger-weak);border-color:#fecaca;color:#991b1b}
.alert-info{background:var(--brand-weak);border-color:#bfdbfe;color:#1e40af}
.alert-warn{background:var(--warn-weak);border-color:#fde68a;color:#92400e}

.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;line-height:20px;background:#f3f4f6;color:#4b5563;white-space:nowrap}
.badge-ok{background:var(--ok-weak);color:var(--ok)}
.badge-warn{background:var(--warn-weak);color:var(--warn)}
.badge-danger{background:var(--danger-weak);color:var(--danger)}
.badge-info{background:var(--brand-weak);color:var(--brand)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.product{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.15s}
.product:hover{box-shadow:var(--shadow);border-color:#cbd5e1}
.product .thumb{height:130px;background:#f3f4f6;display:flex;align-items:center;justify-content:center;color:#9ca3af;font-size:13px;overflow:hidden}
.product .thumb img{width:100%;height:100%;object-fit:cover}
.product .body{padding:14px;display:flex;flex-direction:column;gap:8px;flex:1}
.product .name{font-weight:600;font-size:15px;color:var(--fg);line-height:1.4}
.product .name:hover{color:var(--brand)}
.product .desc{color:var(--muted);font-size:12px;line-height:1.5;max-height:36px;overflow:hidden}
.product .foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto}
.price{color:var(--danger);font-weight:700;font-size:18px}
.price small{font-size:12px;font-weight:400}
.stock{font-size:12px;color:var(--muted)}

.cat-tree{display:flex;flex-direction:column;gap:6px}
.cat-level-1{font-weight:650;color:var(--fg);padding:8px 10px;background:#f9fafb;border-radius:6px}
.cat-level-2{padding-left:22px;color:#374151}
.cat-level-3{padding-left:38px;color:var(--muted);font-size:14px}
.cat-tree a.active{color:var(--brand);font-weight:650}
.cat-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#374151}
.form-row .hint{font-size:12px;color:var(--muted);font-weight:400;margin-left:6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=tel],select,textarea{
  width:100%;padding:9px 11px;border:1px solid #d1d5db;border-radius:8px;font:inherit;font-size:14px;color:var(--fg);background:#fff;outline:none;transition:.15s
}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-weak)}
textarea{resize:vertical;min-height:90px;line-height:1.6}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0 16px}
.form-inline{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.form-inline input{flex:1;min-width:140px}

.table{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.table th{background:#f9fafb;font-weight:600;color:#4b5563;font-size:13px;white-space:nowrap}
.table tr:last-child td{border-bottom:0}
.table .right{text-align:right}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}

.kv{display:grid;grid-template-columns:100px 1fr;gap:8px 14px;font-size:14px}
.kv dt{color:var(--muted)}
.kv dd{margin:0;word-break:break-all}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;word-break:break-all}

.qty{display:inline-flex;align-items:center;border:1px solid #d1d5db;border-radius:8px;overflow:hidden}
.qty button{width:32px;height:34px;border:0;background:#fff;font-size:18px;cursor:pointer;color:#374151}
.qty button:hover{background:#f3f4f6}
.qty input{width:56px;height:34px;border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);border-radius:0;text-align:center;padding:0 4px}
.qty input:focus{box-shadow:none}

.code-box{background:#f8fafc;border:1px dashed #cbd5e1;border-radius:8px;padding:12px 14px;margin:8px 0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;word-break:break-all;line-height:1.8}
.code-box .idx{color:var(--muted);font-family:inherit;margin-right:8px}
.code-group{margin-bottom:18px}
.code-group h3{font-size:14px;margin-bottom:6px;color:#374151}
.total-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:16px 0;border-top:1px solid var(--line)}
.total-bar .amount{font-size:22px;color:var(--danger);font-weight:700}

.empty{text-align:center;padding:48px 16px;color:var(--muted)}
.empty .big{font-size:40px;color:#d1d5db;margin-bottom:10px}
.pager{display:flex;gap:8px;justify-content:center;margin-top:18px;flex-wrap:wrap}
.pager .btn.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.muted{color:var(--muted)}
.small{font-size:12px}
.right{text-align:right}
.center{text-align:center}
.nowrap{white-space:nowrap}
.mt0{margin-top:0}.mb0{margin-bottom:0}.mt16{margin-top:16px}.mb16{margin-bottom:16px}
.flex{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}

@media (max-width:640px){
  .site-head .inner{padding:10px 14px;gap:10px}
  .nav{gap:12px;font-size:13px;width:100%;margin-left:0;order:3;overflow-x:auto;padding-bottom:2px}
  .site-main{padding:18px 0 40px}
  .wrap{padding:0 12px}
  .card{padding:15px}
  .hero{padding:20px 16px}
  .hero h1{font-size:22px}
  .grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
  .product .thumb{height:96px}
  h1{font-size:21px}h2{font-size:17px}
  .kv{grid-template-columns:84px 1fr}
  .table th,.table td{padding:8px 9px;font-size:13px}
  .btn-lg{width:100%}
}