:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-line: #1f6feb;
  --ok: #3fb950;
  --purple: #a371f7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", system-ui, sans-serif;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

h1 {
  margin: 0 0 24px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .4px;
}

/* ---------- 统计卡片 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.stat {
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat .num {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  line-height: 1.3;
  word-break: break-all;
}

.stat:nth-child(2) .num { color: var(--purple); }
.stat:nth-child(3) .num { color: var(--ok); }

.stat .cap {
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 折线图 ---------- */
.chart-card {
  padding: 16px 18px 10px;
  margin-bottom: 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.chart-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.chart-head h2 { margin: 0; font-size: 15px; font-weight: 600; }
.muted { color: var(--muted); font-size: 12.5px; }

.chart svg { display: block; width: 100%; height: auto; }
.chart .tick { fill: var(--muted); font-size: 10px; }
.chart-tip { color: var(--muted); font-size: 13px; padding: 8px 0 14px; }

/* ---------- 加速实例 ---------- */
.label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 15px;
}

.samples {
  margin: 0;
  padding: 0;
  list-style: none;
}

.samples li {
  padding: 10px 0;
  border-top: 1px solid var(--border);
  word-break: break-all;
}

.samples li:first-child { border-top: 0; }

code,
.samples a {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 13.5px;
}

code { color: var(--muted); }

.samples a {
  color: var(--accent);
  text-decoration: none;
}

.samples a:hover { text-decoration: underline; }

.host { color: var(--accent); }

@media (max-width: 560px) {
  .wrap { padding: 32px 16px 60px; }
  h1 { font-size: 21px; }
  .stats { grid-template-columns: 1fr; }
  .stat { flex-direction: row; align-items: baseline; gap: 10px; }
  .stat .num { font-size: 20px; }
}