:root {
  --bg: #fbfaf8;
  --fg: #1c1917;
  --muted: #6b6560;
  --card: #ffffff;
  --line: #e7e2da;
  --accent: #9a5b2e;
  --accent-soft: #f3e8dc;
  --max: 780px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312;
    --fg: #ece7e0;
    --muted: #a39c93;
    --card: #1d1b19;
    --line: #332f2b;
    --accent: #e0a26f;
    --accent-soft: #2b241d;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px 0;
}

.brand {
  font-weight: 650;
  letter-spacing: .02em;
  font-size: 17px;
}

.site-header nav { color: var(--muted); font-size: 14px; }
.site-header nav a:hover { color: var(--accent); }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 0 0 12px;
}

.lede {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 48px;
  max-width: 34em;
}

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.cards li a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  transition: border-color .15s ease, transform .15s ease;
}

.cards li a:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.cards h2 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.4;
}

.cards p {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 10px;
}

.cards time {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.empty {
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 14px;
  padding: 40px 24px;
  text-align: center;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 48px;
  color: var(--muted);
  font-size: 13px;
}

/* ---- 报告页 ---- */

.report {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.report article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: clamp(24px, 5vw, 48px);
}

.report h1 { margin-bottom: 8px; }
.report .meta { color: var(--muted); font-size: 14px; margin: 0 0 36px; }

.report article h2 {
  font-size: 22px;
  margin: 2.4em 0 .8em;
  padding-bottom: .3em;
  border-bottom: 1px solid var(--line);
}

.report article h3 { font-size: 18px; margin: 1.8em 0 .6em; }

.report article p, .report article li { color: var(--fg); }

.report article blockquote {
  margin: 1.4em 0;
  padding: 14px 18px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
}

.report article blockquote p { margin: 0; }

.report article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 1.4em 0;
}

.report article th, .report article td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
}

.report article th { color: var(--muted); font-weight: 500; }

.report article code {
  background: var(--accent-soft);
  padding: .1em .4em;
  border-radius: 5px;
  font-size: .92em;
}

.report .back {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 14px;
}

.report .back:hover { color: var(--accent); }