:root {
  --bg: #070b12;
  --card: #101826;
  --line: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);
  --accent: #2d85e3;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans SC", system-ui, sans-serif;
}
a { color: #9fd0ff; text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 760px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; color: var(--text); }
.brand img {
  width: auto;
  height: 26px;
  max-width: 128px;
}
.nav { display: flex; flex-wrap: wrap; gap: 0.9rem; font-size: 0.875rem; }
.nav a { color: var(--muted); }
.nav a[aria-current="page"] { color: #fff; }
h1 {
  margin: 1.75rem 0 0.85rem;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  line-height: 1.25;
}
.lead { color: var(--muted); line-height: 1.8; margin: 0 0 1.25rem; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.05rem;
}
.card h2 { margin: 0 0 0.35rem; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.65; }
details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin: 0 0 0.65rem;
}
summary { cursor: pointer; font-weight: 650; }
details p { margin: 0.7rem 0 0; color: var(--muted); line-height: 1.7; font-size: 0.95rem; }
.cta {
  display: inline-flex;
  margin-top: 1.25rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #2d85e3, #1d5fa8);
  color: #fff;
  font-weight: 650;
}
.foot {
  margin-top: 2.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } }