:root {
  --primary: #2f54eb;
  --primary-dark: #1d39c4;
  --bg: #f0f2f5;
  --panel: #ffffff;
  --text: #1f2329;
  --muted: #8a909c;
  --border: #e5e6eb;
  --ok: #00b42a;
  --warn: #ff7d00;
  --danger: #f53f3f;
  --radius: 8px;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
a { color: var(--primary); text-decoration: none; }
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: 220px;
  background: #001529; color: #fff; padding: 18px 0; overflow-y: auto;
}
.sidebar .brand { font-size: 16px; font-weight: 700; padding: 0 20px 16px; color: #fff; }
.sidebar .brand small { display: block; font-weight: 400; color: #8fa6c4; font-size: 12px; margin-top: 4px; }
.sidebar nav a {
  display: block; color: #b8c2d8; padding: 11px 20px; font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover, .sidebar nav a.active { background: #0a2540; color: #fff; border-left-color: var(--primary); }
.sidebar .foot { position: absolute; bottom: 14px; left: 20px; right: 20px; color: #6b7a99; font-size: 12px; }
.main { margin-left: 220px; padding: 24px 28px; min-height: 100vh; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.topbar h1 { font-size: 20px; margin: 0; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.stat .num { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat .lbl { color: var(--muted); margin-top: 4px; }
table { width: 100%; border-collapse: collapse; background: var(--panel); }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { background: #fafafa; color: #5a6473; font-weight: 600; }
tr:hover td { background: #fafbff; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.tag.ok { background: #e8ffea; color: var(--ok); }
.tag.warn { background: #fff3e0; color: var(--warn); }
.tag.danger { background: #ffece8; color: var(--danger); }
.tag.info { background: #e8f0ff; color: var(--primary); }
.btn { display: inline-block; padding: 7px 16px; border-radius: 6px; border: 1px solid var(--border); background: #fff; cursor: pointer; font-size: 13px; }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--danger); border-color: #ffd4d4; }
.btn.sm { padding: 4px 10px; font-size: 12px; }
.btn.icon { padding: 3px 8px; font-size: 12px; line-height: 1.2; border-color: var(--border); color: var(--muted); background:#fff; }
.btn.icon:hover { color: var(--primary); border-color: var(--primary); }
.form-row { margin-bottom: 14px; }
.form-row label { display: block; margin-bottom: 6px; color: #4a5159; }
input, select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
textarea { min-height: 70px; resize: vertical; }
.form-row .hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.chk { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; color: var(--text); margin: 0; cursor: pointer; }
.chk input { width: auto; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 200px; }
.dialog-mask { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: none; align-items: center; justify-content: center; z-index: 50; }
.dialog-mask.show { display: flex; }
.dialog { background: #fff; border-radius: 10px; width: 520px; max-width: 92vw; max-height: 85vh; padding: 22px 24px; overflow-y: auto; display: flex; flex-direction: column; }
.dialog h3 { margin: 0 0 16px; flex-shrink: 0; }
.dialog form { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.dialog .foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border); flex-shrink: 0; }
.toast { position: fixed; top: 20px; left: 50%; transform: translateX(-50%); background: #1f2329; color: #fff; padding: 10px 18px; border-radius: 6px; opacity: 0; transition: .3s; z-index: 99; }
.toast.show { opacity: 1; }
.pager { display: flex; gap: 8px; align-items: center; margin-top: 12px; }
.login-wrap { max-width: 380px; margin: 80px auto; }
.login-wrap .card { padding: 28px; }
.muted { color: var(--muted); }
.code { font-family: ui-monospace, Consolas, monospace; }