:root {
  --bg: #0f1410;
  --card: #1a221c;
  --text: #e8f0ea;
  --muted: #9aaf9e;
  --accent: #3d9a6a;
  --link: #7dcea0;
  --border: #2a3a2e;
  --max: 42rem;
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a { color: var(--link); }
header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
  background: #121a14;
}
header .inner, main, footer .inner {
  max-width: var(--max);
  margin: 0 auto;
}
header a.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}
header nav { margin-top: 0.5rem; display: flex; flex-wrap: wrap; gap: 0.85rem; }
header nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; }
header nav a:hover { color: var(--link); }
main { padding: 1.75rem 1.25rem 3rem; }
h1 { font-size: 1.65rem; margin: 0 0 0.35rem; font-weight: 700; }
.sub { color: var(--muted); margin: 0 0 0.35rem; font-size: 0.95rem; }
.sub.tight { margin-bottom: 1.35rem; }
.promo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  margin: 0 0 1.5rem;
}
.promo-video {
  width: min(100%, 280px);
  border-radius: 18px;
  background: #050805;
  display: block;
}
a.store {
  display: inline-block;
  padding: 0.55rem 1.05rem;
  border-radius: 999px;
  background: #fff;
  color: #111 !important;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.15rem 1.25rem;
  margin-bottom: 1rem;
}
h2 { font-size: 1.1rem; margin: 0 0 0.6rem; color: var(--accent); }
ul { padding-left: 1.2rem; margin: 0.4rem 0 0.8rem; }
.lang-tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.lang-tabs a {
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
.lang-tabs a.active, .lang-tabs a:hover {
  border-color: var(--accent);
  color: var(--text);
  background: #243028;
}
.lang-block { display: none; }
.lang-block.active { display: block; }
.cta {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: #04140c !important;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}
footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9rem; }