:root {
  --bg: #fbf8f2;
  --surface: #ffffff;
  --text: #2b2620;
  --muted: #6f665b;
  --line: #e8e1d5;
  --accent: #a87412;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17140f;
    --surface: #211d17;
    --text: #f1ebe1;
    --muted: #b0a698;
    --line: #3a332a;
    --accent: #e0b24f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17140f;
  --surface: #211d17;
  --text: #f1ebe1;
  --muted: #b0a698;
  --line: #3a332a;
  --accent: #e0b24f;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
header.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 32px; }
.brand { font-weight: 700; font-size: 22px; letter-spacing: -0.01em; color: var(--accent); text-decoration: none; }
.lang { font-size: 15px; color: var(--muted); }
.lang a, .lang span { padding: 2px 4px; }
.lang span { color: var(--text); font-weight: 600; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 36px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 15px; margin-bottom: 24px; }
.summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 24px 0;
}
.summary p:last-child { margin-bottom: 0; }
.cards { display: grid; gap: 12px; margin-top: 24px; }
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--text);
}
.card strong { display: block; color: var(--accent); }
.card span { color: var(--muted); font-size: 15px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer a { margin-right: 12px; }