:root {
  --ocean: #1677b8;
  --lagoon: #26a9a7;
  --sand: #f7f4ee;
  --ink: #173042;
  --muted: #5c7080;
  --line: #e6e0d5;
  --coral: #eb6b4f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.7;
}
header {
  background: var(--ocean);
  color: #fff;
  padding: 20px 16px;
}
header a { color: #fff; text-decoration: none; font-weight: 700; font-size: 18px; }
main { max-width: 680px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 26px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
p, li { font-size: 16px; }
.muted { color: var(--muted); font-size: 14px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin: 16px 0;
}
.btn {
  display: inline-block;
  background: var(--ocean);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 14px;
  margin: 6px 8px 6px 0;
  border: 0;
  font-size: 16px;
  cursor: pointer;
}
.btn.secondary { background: #fff; color: var(--ocean); border: 1.5px solid #b9d6ea; }
.token {
  font-family: Consolas, monospace;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  word-break: break-all;
  font-size: 14px;
}
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 16px; }
footer a { color: var(--muted); }