:root {
  --bg: #f4f7fb;
  --paper: #ffffff;
  --ink: #15202b;
  --muted: #5b6b7a;
  --line: #d7e0ea;
  --accent: #087dc7;
  --accent-soft: #e8f4fc;
  --warn: #8a4b12;
  --warn-bg: #fff6e8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
}

.nav { display: flex; gap: 16px; flex-wrap: wrap; }

.nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
}

.nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 5px; }
a { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 3px; }
.skip-link { position: absolute; left: 16px; top: -100px; padding: 8px 16px; background: var(--paper); }
.skip-link:focus { top: 8px; z-index: 1; }
.eyebrow { color: var(--accent); font-size: 14px; font-weight: 700; margin: 0 0 10px; }

.paper {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px 40px 48px;
  box-shadow: 0 10px 30px rgba(21, 32, 43, 0.04);
}

h1 {
  font-size: 30px;
  line-height: 1.3;
  margin: 0 0 10px;
}

h2 {
  font-size: 20px;
  margin: 36px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h3 {
  font-size: 16px;
  margin: 22px 0 8px;
}

p, li { color: #243140; }
p { overflow-wrap: anywhere; }

.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 22px;
}

.note {
  background: var(--warn-bg);
  color: var(--warn);
  border-left: 4px solid #f0b25b;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
}

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}
.card:hover { border-color: var(--accent); background: var(--accent-soft); }
.card strong span { float: right; }

.card strong {
  display: block;
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--accent);
}

ul { padding-left: 20px; }
li { margin: 6px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th { background: var(--accent-soft); }

.footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.footer p { color: var(--muted); margin: 4px 0; }

@media (max-width: 720px) {
  .paper { padding: 24px 18px 32px; }
  .cards { grid-template-columns: 1fr; }
  .nav { gap: 14px; }
  .wrap { padding: 20px 14px 40px; }
  h1 { font-size: 26px; }
}

@media print {
  html, body { background: white; }
  .wrap { max-width: none; padding: 0; }
  .paper { border: 0; border-radius: 0; box-shadow: none; padding: 0; }
  .topbar, .skip-link { display: none; }
  h2 { break-after: avoid; }
}