:root {
  --canvas: #f6f4ef;
  --paper: #fffefa;
  --ink: #1c252c;
  --muted: #66737c;
  --line: #dfe4e6;
  --accent: #174d62;
  --accent-soft: #e7f0f3;
  --warm: #f5ebd8;
  --risk: #8f3f37;
  --risk-soft: #f8e9e6;
  --good: #2f6753;
  --good-soft: #e8f1ec;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.78;
}

body::before {
  content: "INTERNAL · REVIEW COPY";
  position: fixed;
  top: 22px;
  right: 26px;
  z-index: 3;
  color: #7b6a50;
  font: 600 11px/1.2 "SF Mono", "Menlo", monospace;
  letter-spacing: .12em;
}

main, body > header, body > section, body > h1, body > h2, body > h3,
body > p, body > blockquote, body > table, body > ul, body > ol, body > hr {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

body > h1 {
  margin-top: 76px;
  margin-bottom: 12px;
  padding: 56px 64px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  color: #113846;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: -.035em;
}

body > blockquote:first-of-type {
  margin-top: -12px;
  margin-bottom: 0;
  padding: 0 64px 50px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 12px 12px;
  color: var(--muted);
}

body > blockquote:first-of-type p {
  margin: 0;
  padding-top: 2px;
  font-size: 17px;
}

body > h2,
body > h3,
body > h4,
body > p,
body > ul,
body > ol,
body > table,
body > blockquote:not(:first-of-type),
body > hr {
  max-width: 1120px;
}

h2 {
  margin-top: 28px;
  margin-bottom: 0;
  padding: 40px 56px 18px;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: var(--accent);
  font-size: 27px;
  line-height: 1.28;
}

h3 {
  margin-top: 0;
  margin-bottom: 0;
  padding: 28px 56px 12px;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-size: 21px;
  line-height: 1.35;
}

h4 {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 56px 8px;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-size: 17px;
}

body > p,
body > ul,
body > ol,
body > table,
body > blockquote:not(:first-of-type),
body > hr {
  margin-top: 0;
  margin-bottom: 0;
  padding: 10px 56px 18px;
  background: var(--paper);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

body > ul,
body > ol { padding-left: 86px; }

li { margin: 7px 0; }

strong { color: #0f4356; }

table {
  display: table;
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}

thead th {
  padding: 12px 14px;
  color: #173d4a;
  background: var(--accent-soft);
  border-top: 1px solid #cad8dd;
  border-bottom: 1px solid #cad8dd;
  text-align: left;
  font-size: 14px;
}

tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  font-size: 14px;
}

tbody tr:nth-child(even) td { background: #fbfbf8; }

blockquote:not(:first-of-type) {
  color: #634d2e;
}

blockquote:not(:first-of-type) p {
  margin: 0;
  padding: 18px 22px;
  background: var(--warm);
  border-left: 4px solid #b48a4d;
}

hr {
  border-top: 0;
  border-bottom: 1px solid var(--line);
  padding-top: 24px;
}

body > p:last-child {
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
  border-radius: 0 0 12px 12px;
  margin-bottom: 80px;
}

code {
  padding: 2px 5px;
  border-radius: 4px;
  color: #264d5b;
  background: var(--accent-soft);
  font-family: "SF Mono", "Menlo", monospace;
  font-size: .9em;
}

@media (max-width: 760px) {
  body { font-size: 15px; }
  body::before { position: absolute; top: 16px; right: 16px; }
  body > h1 { margin-top: 52px; padding: 36px 22px 14px; }
  body > blockquote:first-of-type { padding: 0 22px 32px; }
  h2 { padding: 32px 22px 14px; font-size: 23px; }
  h3 { padding: 24px 22px 10px; }
  h4 { padding: 20px 22px 8px; }
  body > p, body > ul, body > ol, body > table,
  body > blockquote:not(:first-of-type), body > hr { padding-left: 22px; padding-right: 22px; }
  body > ul, body > ol { padding-left: 48px; }
  table { display: block; overflow-x: auto; }
}

@media print {
  body { background: #fff; font-size: 11pt; }
  body::before { display: none; }
  body > h1, body > blockquote:first-of-type, h2, h3, h4,
  body > p, body > ul, body > ol, body > table,
  body > blockquote:not(:first-of-type), body > hr { border-left: 0; border-right: 0; }
  h2 { break-before: auto; }
  table, blockquote { break-inside: avoid; }
}