:root{
  --bg:#f5f7fb;
  --panel:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#e5e7eb;
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --soft:#eff6ff;
  --danger:#b91c1c;
  --success:#047857;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif}
a{color:inherit;text-decoration:none}
.layout{display:flex;min-height:100vh}
.sidebar{width:260px;background:#111827;color:#fff;padding:22px;display:flex;flex-direction:column;gap:24px;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:12px}

.brand-title{font-size:18px;font-weight:800}.brand-sub{font-size:12px;color:#9ca3af}.nav-item{display:block;padding:12px 14px;border-radius:12px;color:#d1d5db;margin-bottom:6px}.nav-item:hover{background:#1f2937;color:#fff}.sidebar-footer{margin-top:auto;color:#d1d5db;font-size:14px;line-height:1.7}.sidebar-footer a{display:inline-block;margin-top:10px;color:#93c5fd}.content{flex:1;padding:28px;max-width:1400px}.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.page-head h1{margin:0 0 8px;font-size:28px}.page-head p{margin:0;color:var(--muted)}.badge{background:var(--soft);color:var(--primary);padding:8px 12px;border-radius:999px;font-weight:700}.cards{display:grid;gap:16px;margin-bottom:18px}.cards.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card,.panel,.voucher-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 26px rgba(15,23,42,.04)}.card{padding:20px}.card-label{color:var(--muted);font-size:14px}.card-value{font-size:26px;font-weight:800;margin-top:8px}.grid{display:grid;gap:18px;margin-bottom:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.panel{padding:20px;margin-bottom:18px}.panel h2{margin:0 0 14px;font-size:18px}.muted{color:var(--muted)}.notice{background:#f8fafc;border:1px dashed #cbd5e1;padding:16px;border-radius:14px}.steps{line-height:2;margin:0;padding-left:22px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}th{color:#374151;background:#f9fafb;font-weight:700}.status{display:inline-block;background:#f3f4f6;border:1px solid #e5e7eb;padding:4px 8px;border-radius:999px}.actions{display:flex;gap:8px;align-items:center}.actions form{display:inline}.btn{border:0;border-radius:12px;background:#e5e7eb;color:#111827;padding:10px 14px;font-weight:700;cursor:pointer}.btn:hover{filter:brightness(.97)}.btn.primary{background:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-dark)}.btn.secondary{background:#dbeafe;color:#1d4ed8}.btn.small{font-size:12px;padding:7px 10px;border-radius:9px}.form-stack{display:grid;gap:14px}.form-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;align-items:end}.form-grid .wide{grid-column:span 2}label{display:grid;gap:7px;font-weight:700;font-size:14px}input,select{width:100%;border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px 12px;font:inherit}input:focus,select:focus{outline:2px solid #bfdbfe;border-color:#93c5fd}.flash-wrap{margin-bottom:16px}.flash{padding:12px 14px;border-radius:12px;margin-bottom:8px;background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe}.flash.error{background:#fef2f2;color:var(--danger);border-color:#fecaca}.flash.success{background:#ecfdf5;color:var(--success);border-color:#a7f3d0}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#dbeafe,#f8fafc 55%,#eef2ff)}.login-card{width:min(460px,calc(100vw - 32px));background:#fff;border:1px solid var(--line);box-shadow:0 24px 80px rgba(15,23,42,.12);border-radius:24px;padding:28px}.login-card h1{margin:16px 0 8px}.login-card p{color:var(--muted);margin:0 0 18px}.demo-box{background:#f9fafb;border:1px solid var(--line);border-radius:14px;padding:12px;margin-top:16px;font-size:13px;color:#4b5563;line-height:1.7}.voucher-card{padding:16px;margin-bottom:16px}.voucher-head{display:flex;justify-content:space-between;gap:12px;align-items:center}.voucher-head span{color:var(--muted)}
@media (max-width: 900px){.layout{display:block}.sidebar{position:static;width:auto;height:auto}.content{padding:18px}.cards.four,.grid.two,.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:auto}.actions,.voucher-head{display:block}.actions form{display:inline-block;margin:4px 4px 0 0}table{display:block;overflow-x:auto;white-space:nowrap}}