:root {
  color-scheme: light dark;
  --paper: #f2f2f7;
  --surface: #ffffff;
  --ink: #000000;
  --muted: #6c6c70;
  --faint: #8e8e93;
  --brand: #007aff;
  --line: rgba(60, 60, 67, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #000000;
    --surface: #1c1c1e;
    --ink: #ffffff;
    --muted: #aeaeb2;
    --faint: #8e8e93;
    --brand: #0a84ff;
    --line: rgba(84, 84, 88, 0.65);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 40px 20px 64px;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", Roboto, sans-serif;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.mark {
  display: flex;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: var(--brand);
  color: #ffffff;
  font-size: 22px;
}

.brand b {
  font-size: 20px;
  font-weight: 600;
}

h1 {
  margin: 20px 0 4px;
  font-size: 26px;
  font-weight: 600;
}

.sub {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
}

.card {
  margin-bottom: 22px;
  padding: 24px 22px;
  border: 0.5px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}

.lead {
  margin: 0 0 20px;
  color: var(--ink);
}

h2 {
  margin: 22px 0 4px;
  font-size: 16px;
  font-weight: 600;
}

h2:first-of-type {
  margin-top: 0;
}

p {
  margin: 0 0 4px;
  color: var(--muted);
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.lang {
  margin: 0 0 10px;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.contact {
  display: inline-block;
  margin-top: 14px;
  font-weight: 600;
}

.links {
  display: grid;
  gap: 12px;
}

footer {
  margin-top: 30px;
  color: var(--faint);
  font-size: 12px;
  text-align: center;
}