:root {
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --line: #e4e4e7;
  --bg: #ffffff;
  --accent: #c8102e;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 1200px;
  padding: 24px 20px 48px;
}

header h1 {
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.sub { color: var(--muted); margin: 0 0 16px; font-size: 14px; }

.controls { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 12px 0; }
.controls .row { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; font-size: 14px; }
.controls .row + .row { margin-top: 10px; }
.controls label { display: inline-flex; align-items: center; gap: 6px; }
.controls select { font: inherit; padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px; background: #fff; max-width: 260px; }
.controls output { display: inline-block; min-width: 1.5em; text-align: right; font-variant-numeric: tabular-nums; }
.hint { color: var(--muted); font-size: 12px; margin: 8px 0 0; }

main { position: relative; }
#chart { overflow-x: auto; }
#chart svg { width: 100%; min-width: 900px; height: auto; display: block; }
#chart .seg { cursor: default; }
#chart .seg.drill { cursor: pointer; }
#chart .seg:hover rect { filter: brightness(1.08); }
#chart .band { opacity: 0.55; }
#chart .dim { opacity: 0.25; }
#chart text { font-variant-numeric: tabular-nums; }

#tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(20, 20, 22, 0.92);
  color: #fff;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.5;
  max-width: 280px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
#tooltip b { font-size: 14px; }
#tooltip .k { color: #b8b8be; }

.table-wrap h2 { font-size: 16px; margin: 28px 0 8px; }
#table { overflow-x: auto; }
#table table { border-collapse: collapse; width: 100%; font-size: 13px; font-variant-numeric: tabular-nums; }
#table th, #table td { padding: 5px 8px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
#table th:first-child, #table td:first-child { text-align: left; position: sticky; left: 0; background: #fff; }
#table thead th { font-weight: 600; color: var(--muted); }
#table tr.total td { font-weight: 700; }
#table tr.group td { font-weight: 600; background: #fafafa; }
#table tr.group td:first-child { background: #fafafa; }
#table tr.child td:first-child { padding-left: 26px; }
#table .sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }

footer { margin-top: 28px; color: var(--muted); font-size: 12px; line-height: 1.7; }
footer a { color: var(--accent); }