:root {
  --bg: #08111f;
  --surface: #111c2f;
  --surface-2: #17263f;
  --line: rgba(255,255,255,.1);
  --text: #eef5ff;
  --muted: #9fb0ca;
  --blue: #48a5ff;
  --green: #59d49f;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: radial-gradient(circle at 18% 0%, rgba(72,165,255,.2), transparent 34%), linear-gradient(180deg, #08111f 0%, #0b1526 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
.page-shell { width: min(1160px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 54px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(260px, .8fr); gap: 18px; margin-bottom: 18px; }
.hero-copy, .hero-panel, .download-card, .notes { background: rgba(17,28,47,.92); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,.28); }
.hero-copy { padding: 34px; }
.eyebrow { margin: 0 0 10px; color: var(--green); font-size: 13px; font-weight: 800; }
h1 { margin: 0 0 14px; font-size: clamp(32px, 5vw, 56px); line-height: 1.05; }
.lead { max-width: 680px; margin: 0 0 24px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.primary-btn, .secondary-btn, .download-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 18px; border-radius: 8px; font-weight: 800; }
.primary-btn, .download-btn { background: linear-gradient(135deg, var(--blue), #79d6ff); color: #07111f; }
.secondary-btn { border: 1px solid var(--line); background: rgba(255,255,255,.04); }
.hero-panel { display: grid; gap: 12px; align-content: center; padding: 20px; }
.hero-panel div { display: flex; justify-content: space-between; gap: 12px; padding: 14px 16px; background: rgba(255,255,255,.04); border: 1px solid var(--line); border-radius: 8px; }
.hero-panel span, .file-desc, .card-subtitle, .notes p, .notes li { color: var(--muted); }
.downloads-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.download-card { padding: 20px; }
.card-head { display: flex; justify-content: space-between; gap: 12px; align-items: start; margin-bottom: 14px; }
.card-head h2 { margin: 0 0 4px; font-size: 22px; }
.card-subtitle { margin: 0; }
.badge { flex: 0 0 auto; padding: 6px 10px; border-radius: 999px; background: rgba(72,165,255,.13); color: #a9d7ff; border: 1px solid rgba(72,165,255,.22); font-weight: 800; font-size: 13px; }
.file-list { display: grid; gap: 10px; }
.file-row { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.035); }
.file-name, .file-desc { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-desc { font-size: 14px; }
.download-btn { min-width: 84px; }
.notes { margin-top: 16px; padding: 24px 28px; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(0,.8fr); gap: 18px; }
.notes h2 { margin: 0 0 8px; }
.notes p { margin: 0; }
.notes ul { margin: 0; padding-left: 18px; }
@media (max-width: 860px) { .hero, .downloads-grid, .notes { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .page-shell { width: min(100% - 20px, 1160px); padding-top: 20px; } .hero-copy, .hero-panel, .download-card, .notes { padding: 18px; } .file-row { grid-template-columns: 1fr; } .download-btn { width: 100%; } }