:root {
  --bg: #0b0d10;
  --panel: #12151a;
  --line: rgba(255,255,255,.09);
  --text: #f4f4f5;
  --muted: #9ca0a8;
  --orange: #ff7a45;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.9;
}
a { color: var(--orange); text-decoration: none; }
header {
  max-width: 780px;
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand { font-size: 11px; font-weight: 800; letter-spacing: .2em; color: #d4d4d8; }
header a { font-size: 12px; }
main { max-width: 780px; margin: 0 auto; padding: 18px 20px 70px; }
h1 { font-size: 30px; letter-spacing: -.02em; margin: 20px 0 4px; }
.date { color: #62666e; font-size: 11px; margin-bottom: 28px; }
h2 { font-size: 16px; margin: 30px 0 8px; }
p, li { color: var(--muted); font-size: 13px; }
ul { padding-left: 20px; }
.note {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 24px 0;
  color: #b6bac2;
  font-size: 12px;
}
footer {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px;
  border-top: 1px solid var(--line);
  color: #5c6068;
  font-size: 11px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}