:root {
  color-scheme: light dark;
  --background: #f7f3ea;
  --surface: #fffdf8;
  --text: #28241f;
  --secondary: #6f675d;
  --accent: #94703d;
  --line: #ded5c7;
  --notice: #f2e7d5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

.document {
  width: min(100% - 32px, 760px);
  margin: 24px auto 56px;
  padding: 28px clamp(20px, 5vw, 48px) 40px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 7vw, 40px);
  line-height: 1.25;
  letter-spacing: .02em;
}

h2 {
  margin: 32px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 20px;
  line-height: 1.45;
}

h3 { margin: 22px 0 8px; font-size: 17px; }
p, ul, ol { margin: 10px 0; }
ul, ol { padding-left: 1.45em; }
li + li { margin-top: 6px; }
a { color: var(--accent); font-weight: 600; text-underline-offset: 3px; }
.meta { margin: 0 0 28px; color: var(--secondary); font-size: 14px; }
.lead { font-size: 17px; }
.notice {
  margin: 20px 0;
  padding: 14px 16px;
  background: var(--notice);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
}
.footer { margin-top: 36px; color: var(--secondary); font-size: 14px; }

@media (max-width: 520px) {
  .document { width: 100%; margin: 0; border: 0; border-radius: 0; padding-top: 26px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #171511;
    --surface: #211e19;
    --text: #f1eadf;
    --secondary: #bbb1a3;
    --accent: #dfba7d;
    --line: #443d34;
    --notice: #342b20;
  }
}