:root {
  --primary: #1f3b73;
  --primary-dark: #162b55;
  --accent: #b83227;
  --bg: #f3f5f9;
  --card: #ffffff;
  --border: #e3e7ee;
  --text: #1f2633;
  --muted: #6b7686;
  --success: #1e8e5a;
  --warning: #c98a12;
  --danger: #c0392b;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- login ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #162b55 0%, #1f3b73 55%, #2d4f8f 100%);
}
.login-card {
  width: 400px;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .25);
  padding: 40px 40px 32px;
}
.login-brand {
  text-align: center;
  margin-bottom: 28px;
}
.login-brand .logo {
  width: 52px; height: 52px; margin: 0 auto 12px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 22px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: 1px;
}
.login-brand h1 { font-size: 20px; margin: 0 0 4px; }
.login-brand p { margin: 0; color: var(--muted); font-size: 13px; }
.login-footer { text-align: center; color: var(--muted); font-size: 12px; margin-top: 24px; }

/* ---------- layout ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  background: var(--primary-dark);
  color: #cfd8ea;
  display: flex;
  flex-direction: column;
}
.sidebar .brand {
  padding: 22px 20px;
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  letter-spacing: .5px;
}
.sidebar .brand small { display: block; font-size: 11px; font-weight: 400; color: #8ea0c4; margin-top: 4px; }
.sidebar nav { padding: 12px 0; flex: 1; }
.sidebar nav a {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: #cfd8ea;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255, 255, 255, .06); text-decoration: none; color: #fff; }
.sidebar nav a.active { background: rgba(255, 255, 255, .1); border-left-color: #fff; color: #fff; font-weight: 600; }
.sidebar nav a .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: currentColor; opacity: .6; margin-right: 12px;
}
.sidebar .user {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 13px;
}
.sidebar .user strong { color: #fff; display: block; margin-bottom: 8px; }
.sidebar .user button {
  background: transparent; color: #cfd8ea; border: 1px solid rgba(255, 255, 255, .25);
  padding: 6px 12px; border-radius: 4px; cursor: pointer; font-size: 12px;
}
.sidebar .user button:hover { background: rgba(255, 255, 255, .1); color: #fff; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: 56px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
}
.topbar h2 { font-size: 16px; margin: 0; font-weight: 600; }
.topbar .breadcrumb { color: var(--muted); font-size: 13px; }
.content { padding: 24px 28px 40px; }

/* ---------- cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin: -20px -24px 18px; padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.card-header h3 { margin: 0; font-size: 15px; font-weight: 600; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; position: relative; overflow: hidden;
}
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--primary);
}
.stat.accent::before { background: var(--accent); }
.stat.success::before { background: var(--success); }
.stat.warning::before { background: var(--warning); }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 28px; font-weight: 700; margin-top: 6px; font-variant-numeric: tabular-nums; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 24px; }
.form-grid .full { grid-column: 1 / -1; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text); font-weight: 500; }
.form-group label .req { color: var(--danger); margin-left: 2px; }
.form-group .hint { color: var(--muted); font-size: 12px; }
.form-control {
  width: 100%;
  height: 38px;
  padding: 0 12px;
  border: 1px solid #cfd6e0;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  font-family: inherit;
}
textarea.form-control { height: auto; padding: 10px 12px; resize: vertical; }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(31, 59, 115, .12); }
.form-control.is-invalid { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: 12px; }
.form-actions { display: flex; gap: 12px; margin-top: 24px; align-items: center; }
.input-group { display: flex; }
.input-group .form-control { border-radius: 6px 0 0 6px; flex: 1 1 auto; min-width: 0; }
.input-group .addon {
  display: flex; align-items: center; flex: 0 0 auto; white-space: nowrap;
  padding: 0 12px; border: 1px solid #cfd6e0; border-left: 0;
  border-radius: 0 6px 6px 0; background: #f7f8fa; color: var(--muted); font-size: 13px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 38px; padding: 0 18px; border-radius: 6px; border: 1px solid transparent;
  font-size: 14px; cursor: pointer; font-family: inherit; white-space: nowrap;
  transition: background .15s, border-color .15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: #eef2f9; }
.btn-danger { background: #fff; color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #fbeeec; }
.btn-secondary { background: #fff; color: var(--text); border-color: #cfd6e0; }
.btn-secondary:hover { background: #f5f7fa; }
.btn-sm { height: 30px; padding: 0 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; white-space: nowrap; }
.table th { background: #f7f8fb; color: var(--muted); font-weight: 600; font-size: 12px; letter-spacing: .3px; }
.table tbody tr:hover { background: #fafbfd; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table .actions a { margin-right: 10px; }
.table .actions .link-btn { border: 0; background: none; padding: 0; margin-right: 10px; color: var(--primary); cursor: pointer; font: inherit; }
.table .actions .link-btn.danger { color: var(--danger); }
.empty { text-align: center; color: var(--muted); padding: 40px 0; }

/* ---------- badges ---------- */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; line-height: 1.4;
  background: #eef1f6; color: var(--muted); border: 1px solid transparent;
}
.badge-primary { background: #e7edf9; color: var(--primary); }
.badge-success { background: #e4f4ec; color: var(--success); }
.badge-warning { background: #fbf1dc; color: #9a6a0a; }
.badge-danger { background: #fbe9e7; color: var(--danger); }
.badge-dark { background: #2b3446; color: #fff; }

/* ---------- alerts ---------- */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 18px; font-size: 13px; border: 1px solid transparent; }
.alert-success { background: #e9f7ef; border-color: #bfe5cf; color: #1a6e46; }
.alert-danger { background: #fdecea; border-color: #f5c6c2; color: #9b2c22; }
.alert-info { background: #eaf1fc; border-color: #c7d8f5; color: #22447f; }

/* ---------- filter bar ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.filter-bar .form-group { min-width: 160px; }
.filter-bar .form-control { height: 36px; }

/* ---------- pagination ---------- */
.pagination { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; color: var(--muted); font-size: 13px; }
.pagination .pages a, .pagination .pages span {
  display: inline-block; min-width: 32px; height: 32px; line-height: 30px; text-align: center; margin-left: 6px;
  border: 1px solid var(--border); border-radius: 4px; background: #fff; padding: 0 8px;
}
.pagination .pages span.current { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .pages a.disabled { pointer-events: none; opacity: .5; }

/* ---------- detail ---------- */
.detail-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px 24px; }
.detail-item .k { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.detail-item .v { font-size: 14px; word-break: break-all; }
.detail-item .v.strong { font-weight: 600; font-size: 16px; }
.image-row { display: flex; gap: 20px; flex-wrap: wrap; }
.image-box { width: 260px; }
.image-box .k { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.image-box img { width: 100%; border: 1px solid var(--border); border-radius: 6px; background: #fafafa; }
.image-box .none { height: 160px; border: 1px dashed var(--border); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: var(--muted); }

/* ---------- qr detail ---------- */
.qr-panel { display: flex; gap: 32px; align-items: flex-start; flex-wrap: wrap; }
.qr-image { width: 280px; text-align: center; }
.qr-image img { width: 260px; height: 260px; border: 1px solid var(--border); border-radius: 8px; padding: 8px; background: #fff; }
.qr-image .caption { color: var(--muted); font-size: 12px; margin-top: 8px; }
.qr-info { flex: 1; min-width: 300px; }
.qr-url { display: flex; gap: 8px; margin-top: 6px; }
.qr-url input { flex: 1; }
.money { font-variant-numeric: tabular-nums; }
.text-muted { color: var(--muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

@media (max-width: 900px) {
  .sidebar { display: none; }
  .form-grid, .detail-grid { grid-template-columns: 1fr; }
  .content { padding: 16px; }
}