:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --bg: #f4f5fb;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e5e7eb;
  --ok: #16a34a;
  --err: #dc2626;
  --warn: #d97706;
  --radius: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6; font-size: 15px;
}
a { color: var(--primary); text-decoration: none; }
a:hover { opacity: .85; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* navbar */
.navbar { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; flex-wrap: wrap; }
.brand { font-size: 19px; font-weight: 700; color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 18px; font-size: 14px; flex-wrap: wrap; }
.nav-links a { color: var(--text); }
.nav-links a:hover { color: var(--primary); }
.points-pill { background: #eef2ff; color: var(--primary-dark); padding: 3px 12px; border-radius: 999px; font-weight: 600; }
.btn-link { color: var(--muted) !important; }

.announce { background: #fef3c7; color: #92400e; font-size: 14px; padding: 8px 0; }
.main { padding: 24px 16px 48px; min-height: calc(100vh - 130px); }
.footer { background: #fff; border-top: 1px solid var(--border); padding: 18px 0; color: var(--muted); font-size: 13px; text-align: center; }

/* cards & grid */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.soft-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; gap: 8px; transition: box-shadow .15s; }
.soft-card:hover { box-shadow: 0 6px 18px rgba(0,0,0,.08); }
.soft-card h3 { font-size: 16px; }
.soft-card .desc { color: var(--muted); font-size: 13px; flex: 1; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.price { color: var(--warn); font-weight: 700; font-size: 17px; }
.price small { font-size: 12px; color: var(--muted); font-weight: 400; }
.stock-tag { font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.stock-in { background: #dcfce7; color: #15803d; }
.stock-out { background: #fee2e2; color: #b91c1c; }
.cat-tag { font-size: 12px; background: #eef2ff; color: var(--primary-dark); padding: 2px 8px; border-radius: 6px; }

/* buttons & forms */
.btn { display: inline-block; background: var(--primary); color: #fff !important; border: none; padding: 9px 18px; border-radius: 8px; font-size: 14px; cursor: pointer; text-align: center; }
.btn:hover { background: var(--primary-dark); opacity: 1; }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-ghost { background: #fff; color: var(--text) !important; border: 1px solid var(--border); }
.btn-ghost:hover { background: #f9fafb; }
.btn-danger { background: var(--err); }
.btn-ok { background: var(--ok); }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input[type=text], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid #c7d2fe; border-color: var(--primary); }
textarea { min-height: 110px; resize: vertical; }
.form-row { margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.form-box { max-width: 420px; margin: 0 auto; }

/* alerts */
.alert { padding: 11px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-ok { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.alert-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }

/* tables */
table { width: 100%; border-collapse: collapse; background: var(--card); font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f9fafb; color: var(--muted); font-weight: 600; white-space: nowrap; }
tr:hover td { background: #fafbff; }
.mono { font-family: Consolas, Menlo, monospace; font-size: 13px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* badges */
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.badge-green { background: #dcfce7; color: #15803d; }
.badge-red { background: #fee2e2; color: #b91c1c; }
.badge-gray { background: #f3f4f6; color: #6b7280; }
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-amber { background: #fef3c7; color: #92400e; }

/* home hero */
.hero { background: linear-gradient(135deg, #4f46e5, #7c3aed); color: #fff; border-radius: var(--radius); padding: 26px 28px; margin-bottom: 20px; }
.hero h2 { font-size: 22px; margin-bottom: 6px; }
.hero p { opacity: .9; font-size: 14px; }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar form { display: flex; gap: 10px; flex: 1; min-width: 220px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 4px 14px; font-size: 13px; color: var(--text); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* detail */
.detail-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.detail-desc { margin: 14px 0; color: #374151; white-space: pre-wrap; }
.redeem-box { background: #eef2ff; border-radius: var(--radius); padding: 18px; text-align: center; }
.redeem-box .big { font-size: 28px; font-weight: 800; color: var(--warn); }

/* admin */
.admin-wrap { display: flex; min-height: 100vh; }
.admin-side { width: 210px; background: #111827; color: #d1d5db; padding: 18px 0; flex-shrink: 0; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.admin-brand { color: #fff; font-size: 17px; font-weight: 700; padding: 0 20px 16px; border-bottom: 1px solid #1f2937; margin-bottom: 12px; }
.admin-brand span { display: block; font-size: 12px; color: #9ca3af; font-weight: 400; }
.admin-side a { display: block; color: #d1d5db; padding: 10px 20px; font-size: 14px; }
.admin-side a:hover { background: #1f2937; color: #fff; opacity: 1; }
.admin-side-foot { margin-top: 20px; border-top: 1px solid #1f2937; padding-top: 10px; }
.admin-main { flex: 1; min-width: 0; }
.admin-head { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; background: #fff; border-bottom: 1px solid var(--border); }
.admin-head h1 { font-size: 18px; }
.admin-user { color: var(--muted); font-size: 13px; }
.admin-body { padding: 22px 24px 60px; }
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.table-wrap table { border: none; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .num { font-size: 24px; font-weight: 800; color: var(--primary); }
.stat .lbl { color: var(--muted); font-size: 13px; }
.section-title { font-size: 16px; font-weight: 600; margin: 22px 0 12px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.actions form { display: inline; }
.mb { margin-bottom: 16px; }
.mt { margin-top: 16px; }

/* copy */
.copy-btn { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 3px 10px; font-size: 12px; cursor: pointer; color: var(--muted); }
.copy-btn:hover { color: var(--primary); border-color: var(--primary); }

@media (max-width: 720px) {
  .admin-wrap { flex-direction: column; }
  .admin-side { width: 100%; height: auto; position: static; display: flex; flex-wrap: wrap; padding: 8px; }
  .admin-brand { width: 100%; border: none; margin: 0; padding: 4px 8px; }
  .admin-side a { padding: 8px 12px; }
  .admin-side-foot { margin: 0; border: none; }
  .nav-inner { height: auto; padding: 10px 0; gap: 8px; }
}
.pay-title { margin-bottom: 10px; font-size: 16px; }
.pay-presets { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.pay-card { margin-bottom: 16px; }

.soft-img { width: 100%; height: 140px; object-fit: cover; border-radius: 8px; margin-bottom: 8px; background: #f3f4f6; }
.detail-img { max-width: 100%; max-height: 260px; border-radius: 12px; margin-bottom: 12px; }