:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --line: #e6e8eb;
  --primary: #2563eb;
  --up: #dc2626;
  --down: #16a34a;
  --warn: #d97706;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 14px; line-height: 1.55;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand .logo { font-weight: 700; font-size: 18px; letter-spacing: .5px; }
.brand .sub { color: var(--muted); margin-left: 10px; font-size: 13px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.pill { background: #eef2ff; color: var(--primary); padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.muted { color: var(--muted); font-size: 12px; }
.btn {
  border: 1px solid var(--primary); background: var(--primary); color: #fff;
  padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.btn:disabled { opacity: .6; cursor: progress; }
main { max-width: 1240px; margin: 0 auto; padding: 0 24px 40px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin: 20px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.card h3 { margin: 0 0 6px; font-size: 14px; font-weight: 600; }
.card .value { font-size: 24px; font-weight: 650; font-variant-numeric: tabular-nums; }
.card .sub { color: var(--muted); font-size: 12px; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; margin-top: 6px; }
.badge.cheap { background: #dcfce7; color: #15803d; }
.badge.mid { background: #fef9c3; color: #a16207; }
.badge.expensive { background: #fee2e2; color: #b91c1c; }
.badge.unknown { background: #f1f5f9; color: #64748b; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin-bottom: 16px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.panel-head h2 { font-size: 15px; margin: 0; }
.controls { display: flex; gap: 14px; align-items: center; }
.controls label { color: var(--muted); font-size: 12px; }
select { padding: 4px 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--text); }
.caption { color: var(--muted); font-size: 12px; margin: 6px 0 10px; }
.chart { width: 100%; height: 340px; }
.chart-lg { height: 420px; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: right; padding: 7px 10px; border-bottom: 1px solid var(--line); }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-weight: 500; }
.subtitle { font-size: 14px; margin: 16px 0 6px; }
.disclaimer { color: var(--muted); font-size: 12px; margin-top: 12px; }
details summary { cursor: pointer; font-size: 15px; font-weight: 600; }
.error { background: #fee2e2; color: #b91c1c; padding: 10px 14px; border-radius: 8px; }

/* 页脚：备案 / 回链主站 / 赞赏 */
.site-footer { border-top: 1px solid var(--line); background: var(--card); }
.footer-inner { max-width: 1240px; margin: 0 auto; padding: 24px; }
.footer-name { font-weight: 700; margin: 0 0 6px; }
.footer-desc { color: var(--muted); font-size: 13px; margin: 0; max-width: 820px; }
.site-footer a { color: var(--primary); }
.legal { color: var(--muted); font-size: 12px; margin: 20px 0 0; }
.legal a { color: var(--muted); }