:root {
  color-scheme: light;
  --ink: #14213d;
  --muted: #5b6475;
  --line: #dfe5ee;
  --panel: #f6f8fb;
  --brand: #3b5ccc;
  --brand-soft: #edf1ff;
  --warn: #8a4b00;
  --warn-bg: #fff7e6;
  --danger: #a32121;
  --danger-bg: #fff0f0;
  --ok: #176b4d;
  --ok-bg: #ecf8f2;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #eef2f7;
  font: 16px/1.8 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); overflow-wrap: anywhere; }
.page {
  width: min(960px, calc(100% - 28px));
  margin: 28px auto;
  padding: clamp(24px, 5vw, 64px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 18px 60px rgba(35, 55, 90, .10);
}
.eyebrow { color: var(--brand); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
h1 { margin: 8px 0 10px; font-size: clamp(30px, 5vw, 48px); line-height: 1.2; letter-spacing: -.03em; }
h2 { margin: 42px 0 12px; padding-top: 6px; font-size: 25px; line-height: 1.35; }
h3 { margin: 26px 0 8px; font-size: 19px; }
p, li { color: #26334a; }
ul, ol { padding-left: 1.45em; }
li + li { margin-top: 7px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 12px 0 22px; color: var(--muted); font-size: 14px; }
.notice, .warning, .danger, .success {
  margin: 20px 0;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-left-width: 5px;
  border-radius: 12px;
  background: var(--panel);
}
.notice { border-left-color: var(--brand); background: var(--brand-soft); }
.warning { border-left-color: #d98700; color: var(--warn); background: var(--warn-bg); }
.danger { border-left-color: #d63a3a; color: var(--danger); background: var(--danger-bg); }
.success { border-left-color: #1e9b6c; color: var(--ok); background: var(--ok-bg); }
.important { font-weight: 700; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
table { width: 100%; margin: 18px 0 28px; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 13px; border: 1px solid var(--line); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
th { background: var(--panel); color: #283652; }
.toc { columns: 2; column-gap: 28px; padding: 18px 24px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.toc li { break-inside: avoid; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.card { min-width: 0; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.card h3 { margin-top: 0; }
.source { color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
footer { margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
@media (max-width: 700px) {
  .page { width: 100%; margin: 0; border: 0; border-radius: 0; box-shadow: none; }
  .toc { columns: 1; }
  .cards { grid-template-columns: 1fr; }
  table { display: block; overflow-x: auto; white-space: normal; }
}
@media print {
  body { background: #fff; }
  .page { width: 100%; margin: 0; padding: 0; border: 0; box-shadow: none; }
  a { color: inherit; text-decoration: none; }
  h2, h3 { break-after: avoid; }
  table, .notice, .warning, .danger, .success { break-inside: avoid; }
}