:root {
  --blue: #1677ff;
  --blue-dark: #0e5fd8;
  --bg: #f5f7fb;
  --card: #fff;
  --text: #1d2129;
  --muted: #86909c;
  --line: #e5e6eb;
  --ok: #00b42a;
  --warn: #ff7d00;
  --danger: #f53f3f;
  --sidebar: #0b1f3a;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
a { color: var(--blue); text-decoration: none; }
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: var(--sidebar);
  color: #c9d4e5;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}
.brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.brand .logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .5px;
}
.brand .sub { font-size: 12px; color: #7d8da6; margin-top: 4px; }
.nav { padding: 12px 10px; flex: 1; }
.nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #c9d4e5;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 2px;
}
.nav a:hover, .nav a.active { background: rgba(22,119,255,.18); color: #fff; }
.nav .group { font-size: 11px; color: #6b7c94; padding: 12px 12px 6px; letter-spacing: 1px; }
.main { flex: 1; min-width: 0; }
.topbar {
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.topbar .who { color: var(--muted); }
.page { padding: 22px 24px 40px; }
.h1 { font-size: 20px; font-weight: 650; margin: 0 0 16px; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 16px 18px;
}
.stat .n { font-size: 26px; font-weight: 700; margin-top: 6px; }
.stat .l { color: var(--muted); font-size: 13px; }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #f2f3f5;
  color: #4e5969;
}
.tag.ok { background: #e8ffea; color: #00b42a; }
.tag.warn { background: #fff7e8; color: #ff7d00; }
.tag.blue { background: #e8f3ff; color: #1677ff; }
.tag.danger { background: #ffece8; color: #f53f3f; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 34px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; cursor: pointer; font-size: 13px; color: var(--text);
}
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-danger { background: #fff; color: var(--danger); border-color: #ffccc7; }
.btn-sm { height: 28px; padding: 0 10px; font-size: 12px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
input, select, textarea {
  height: 34px; border: 1px solid var(--line); border-radius: 8px; padding: 0 10px; font-size: 13px;
  font-family: inherit;
}
textarea { height: auto; padding: 10px; width: 100%; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.form-grid .full { grid-column: 1 / -1; }
.form-item label { display: block; margin-bottom: 6px; color: #4e5969; font-size: 13px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #0b1f3a, #1677ff 80%);
}
.login-card { width: 380px; background: #fff; border-radius: 16px; padding: 36px 32px; }
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.login-card p { color: var(--muted); margin: 0 0 24px; }
.login-card input { width: 100%; height: 42px; margin-bottom: 12px; }
.login-card button { width: 100%; height: 42px; }
.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; }
.alert-err { background: #fff1f0; color: #cf1322; }
.codes { display: flex; gap: 16px; }
.code-box {
  flex: 1; background: #f7f8fa; border-radius: 12px; padding: 16px; text-align: center;
}
.code-box b { font-size: 28px; letter-spacing: 6px; color: var(--blue); }
.dl { display: grid; grid-template-columns: 120px 1fr; gap: 8px 12px; }
.dl dt { color: var(--muted); }
@media (max-width: 960px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .sidebar { display: none; }
  .form-grid { grid-template-columns: 1fr; }
}