:root {
  --bg: #f7f5f0;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --line: #e4e0d6;
  --accent: #0b5f4b;
  --accent-soft: #e6f3ef;
  --warn: #7a4a00;
  --warn-bg: #fff6e8;
  --max: 720px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 17px;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--card);
  position: sticky; top: 0; z-index: 10;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 0.9rem; padding-bottom: 0.9rem; gap: 1rem;
}
.logo { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: 0.02em; }
.nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav a:hover { color: var(--accent); }

.hero { padding: 2.5rem 0 1.5rem; }
.hero h1 { font-size: 1.85rem; line-height: 1.3; margin: 0 0 0.75rem; }
.lede { color: var(--muted); margin: 0 0 1.25rem; font-size: 1.05rem; }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

.disclaimer {
  background: var(--warn-bg);
  border: 1px solid #f0d9a8;
  color: var(--warn);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  margin: 1.25rem 0;
}
.disclaimer strong { display: block; margin-bottom: 0.25rem; }

.card-list { display: grid; gap: 1rem; margin: 1.5rem 0 2.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.15rem 1.25rem;
}
.card h2 { margin: 0 0 0.4rem; font-size: 1.15rem; }
.card h2 a { color: var(--ink); text-decoration: none; }
.card h2 a:hover { color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.98rem; }
.tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

article.prose { padding: 2rem 0 3rem; }
.prose h1 { font-size: 1.7rem; line-height: 1.35; margin: 0 0 0.5rem; }
.prose h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; padding-top: 0.5rem; border-top: 1px solid var(--line); }
.prose h3 { font-size: 1.05rem; margin: 1.4rem 0 0.4rem; }
.prose p, .prose li { color: #2a2a2a; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin: 0.35rem 0; }
.prose .checklist { list-style: none; padding-left: 0; }
.prose .checklist li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  margin: 0.5rem 0;
}
.prose .checklist li::before { content: "☐ "; color: var(--accent); font-weight: 700; }
.prose table {
  width: 100%; border-collapse: collapse; font-size: 0.95rem;
  background: var(--card); margin: 1rem 0;
}
.prose th, .prose td {
  border: 1px solid var(--line); padding: 0.55rem 0.7rem; text-align: left; vertical-align: top;
}
.prose th { background: var(--accent-soft); }
.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer p { margin: 0.35rem 0; }

@media (max-width: 560px) {
  .hero h1, .prose h1 { font-size: 1.45rem; }
  body { font-size: 16px; }
}