:root {
  --bg: #07111f;
  --bg-2: #0f1c2e;
  --ink: #e8eef7;
  --muted: #93a4bb;
  --line: rgba(212, 163, 115, 0.28);
  --gold: #d4a373;
  --sky: #7dd3fc;
  --card: rgba(15, 28, 46, 0.88);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(125, 211, 252, 0.16), transparent 55%),
    radial-gradient(900px 420px at 90% 0%, rgba(212, 163, 115, 0.14), transparent 50%),
    linear-gradient(180deg, var(--bg), #050a14 70%);
}

.page { max-width: 1080px; margin: 0 auto; padding: 28px 24px 64px; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 56px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand strong { display: block; font-size: 16px; letter-spacing: 0.02em; }
.brand small { color: var(--gold); font-size: 11px; }
.nav nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav nav a:hover { color: var(--ink); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 36px;
  align-items: start;
}
.eyebrow { color: var(--sky); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; margin: 0 0 12px; }
h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.25; margin: 0 0 16px; font-weight: 650; }
.lead { color: var(--muted); font-size: 16px; line-height: 1.7; max-width: 38em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  border: 1px solid transparent;
}
.btn.primary { background: var(--gold); color: #1a1208; font-weight: 650; }
.btn.primary.is-disabled { opacity: 0.45; pointer-events: none; }
.btn.ghost { border-color: var(--line); color: var(--ink); }
.btn.mac { background: #16324f; color: var(--ink); border-color: var(--line); font-weight: 650; }
.btn.mac.is-disabled { opacity: 0.45; pointer-events: none; }
.meta { color: var(--muted); font-size: 13px; min-height: 1.4em; }

.hero-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 22px 18px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}
.card-title { font-size: 13px; color: var(--gold); margin-bottom: 14px; }
.hero-card dl { margin: 0; display: grid; gap: 12px; }
.hero-card div { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; }
.hero-card dt { color: var(--muted); }
.hero-card dd { margin: 0; font-family: ui-monospace, Consolas, monospace; }
.hint { margin: 16px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }

.section-link { grid-column: 1 / -1; margin: 8px 0 0; }
.section-link a { color: var(--gold); text-decoration: none; font-size: 14px; }
.section-link a:hover { color: var(--ink); }

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 64px 0 48px;
}

.guide { margin-top: 12px; }
.guide h1 { font-size: clamp(28px, 4vw, 40px); }
.guide-lead { color: var(--muted); max-width: 42em; line-height: 1.7; }
.guide-group { margin: 36px 0; }
.guide-group h2 {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 650;
}
.guide-list { display: grid; gap: 12px; }
.guide-list article {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 18px 20px;
}
.guide-list h3 { margin: 0 0 6px; font-size: 16px; font-weight: 650; }
.guide-list p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.guide-note { color: var(--muted); font-size: 13px; line-height: 1.7; }
.features article {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
}
.features h2 { margin: 0 0 8px; font-size: 16px; }
.features p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.download {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 36px;
}
.download h2 { margin: 0 0 8px; }
.download p { color: var(--muted); }

.archive {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.archive h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; }
.archive h4 { margin: 0 0 10px; font-size: 13px; color: var(--muted); font-weight: 600; }
.archive-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 14px;
}
.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.archive-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 13px;
}
.archive-list a {
  color: var(--sky);
  text-decoration: none;
}
.archive-list a:hover { text-decoration: underline; }
.archive-list span { color: var(--muted); font-size: 12px; }
.archive-empty { color: var(--muted); }

.changelog {
  margin: 0 0 48px;
  padding: 28px 28px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(125, 211, 252, 0.08), transparent 42%),
    rgba(15, 28, 46, 0.72);
}
.changelog-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #07111f;
  background: var(--gold);
  font-weight: 700;
}
.changelog h2 {
  margin: 0 0 10px;
  font-size: 26px;
  line-height: 1.25;
  font-weight: 700;
}
.changelog-lead {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 46rem;
}
.changelog ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink);
  line-height: 1.75;
}
.changelog li + li { margin-top: 6px; }

footer {
  margin-top: 56px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 840px) {
  .hero, .features { grid-template-columns: 1fr; }
  .archive-cols { grid-template-columns: 1fr; }
  .nav { flex-direction: column; align-items: flex-start; }
}