:root {
  --bg: #f7f8fa; --fg: #1f2328; --muted: #6b7280;
  --up: #ef232a; --down: #14b143;
  --line: #e5e7eb; --card: #fff; --accent: #2563eb;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 14px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ---- 顶栏 ---- */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 0 24px; height: 52px; background: #fff;
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10;
}
.brand a { font-weight: 600; text-decoration: none; color: var(--fg); }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
  padding: 6px 12px; border-radius: 6px; text-decoration: none;
  color: var(--muted);
}
.topbar nav a:hover { background: #f0f1f3; color: var(--fg); }
.topbar nav a.on { background: var(--accent); color: #fff; }
.logout { color: var(--muted); text-decoration: none; font-size: 13px; }

main { max-width: 1180px; margin: 0 auto; padding: 24px; }
h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 15px; margin: 0 0 10px; color: #374151; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.up { color: var(--up); }
.down { color: var(--down); }
.r { text-align: right; }

/* ---- 卡片 ---- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.card .k { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.card .v { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---- 表格 ---- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }
section { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 20px; }
.tbl { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.tbl th {
  text-align: left; font-weight: 500; font-size: 12px; color: var(--muted);
  padding: 6px 8px; border-bottom: 1px solid var(--line);
}
.tbl td { padding: 6px 8px; border-bottom: 1px solid #f3f4f6; }
.tbl tr:last-child td { border-bottom: none; }
.tbl td.r, .tbl th.r { text-align: right; }

/* ---- 选择器 ---- */
.picker { margin-bottom: 16px; }
.picker select { padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 14px; min-width: 240px; }

/* ---- 横幅 ---- */
.banner { padding: 10px 24px; font-size: 13px; }
.banner.warn { background: #fef3c7; color: #92400e; border-bottom: 1px solid #fde68a; }

footer { max-width: 1180px; margin: 0 auto; padding: 16px 24px 40px; color: var(--muted); font-size: 12px; }

/* ---- 登录页 ---- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 32px; width: 300px; display: flex; flex-direction: column; gap: 12px;
}
.login-box h1 { font-size: 18px; text-align: center; margin: 0 0 8px; }
.login-box input {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 15px;
}
.login-box button {
  padding: 10px; border: none; border-radius: 8px; background: var(--accent);
  color: #fff; font-size: 15px; cursor: pointer;
}
.login-box .err { color: var(--up); font-size: 13px; margin: 0; text-align: center; }