:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #0f766e;
  --accent-soft: #e6f2f0;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 28px 0 22px;
}
header h1 {
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: 0.5px;
}
header .sub { margin: 0; color: var(--muted); font-size: 14px; }

main { padding: 26px 0 50px; }
.cards { display: grid; gap: 14px; }
.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(15, 118, 110, .10);
  transform: translateY(-1px);
}
.card-date { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card h2 { margin: 0 0 8px; font-size: 22px; line-height: 1.45; }
.card-sub { margin: 0; color: var(--muted); font-size: 14px; }

.back {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 14px;
}
.back:hover { text-decoration: underline; }
.detail-title { margin: 0 0 10px; font-size: 30px; line-height: 1.4; }
.subtitle { margin: 0 0 6px; color: var(--muted); font-size: 15px; }
.meta { margin: 0; color: var(--muted); font-size: 13px; }

article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 26px;
  margin-top: 20px;
}
article h1 { font-size: 24px; margin: 0 0 14px; }
article h2 {
  font-size: 21px;
  margin: 26px 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}
article h3 { font-size: 17px; margin: 20px 0 8px; color: #0f766e; }
article h4 { font-size: 15px; margin: 16px 0 6px; color: #374151; }
article p { margin: 10px 0; }
article ul, article ol { margin: 10px 0; padding-left: 24px; }
article li { margin: 4px 0; }
article li.sub { list-style: circle; }
article blockquote {
  margin: 14px 0;
  padding: 10px 14px;
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  color: #374151;
}
article img {
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  margin: 12px 0;
}
article figure { margin: 18px 0; }
article hr { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }
article code {
  background: #f1f3f5;
  border: 1px solid #e3e6ea;
  border-radius: 5px;
  padding: 1px 5px;
  font-size: .9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

/* 表格：卡片化容器 + 横向滚动，避免手机端挤压 */
article .table-wrap {
  margin: 16px 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .05);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
article table {
  width: 100%;
  min-width: 440px;
  border-collapse: collapse;
  font-size: 14.5px;
  line-height: 1.6;
}
article thead th {
  background: #edf3f2;
  color: #0b4f48;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .3px;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid #d7e3e1;
  white-space: nowrap;
}
article tbody td {
  padding: 11px 16px;
  border-top: 1px solid #eef0f3;
  vertical-align: top;
  color: #2b3641;
}
article tbody tr:first-child td { border-top: 0; }
article tbody tr:nth-child(even) { background: #fafbfc; }
article tbody tr:hover { background: var(--accent-soft); }
article tbody td:first-child { color: #111827; font-weight: 600; }
article th.ta-r, article td.ta-r { text-align: right; font-variant-numeric: tabular-nums; }
article th.ta-c, article td.ta-c { text-align: center; }

footer { border-top: 1px solid var(--line); padding: 18px 0 30px; color: var(--muted); font-size: 13px; }
.empty { background: #fff; border: 1px dashed var(--line); border-radius: 12px; padding: 30px; color: var(--muted); text-align: center; }