:root { color-scheme: light; font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; color: #20251f; background: #fff; letter-spacing: 0; }
* { box-sizing: border-box; }
body { margin: 0; }
.shell { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.topbar { background: #121811; color: #fff; }
.brand { min-height: 68px; display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 600; }
.brand img { object-fit: contain; }
.channel { margin-left: auto; color: #c4ccc1; font-size: 13px; font-weight: 400; }
.intro { padding: 52px 0 24px; }
.eyebrow { font-size: 12px; color: #64705f; margin: 0 0 10px; }
h1 { font-size: 40px; line-height: 1.35; margin: 0 0 14px; font-weight: 650; overflow-wrap: anywhere; }
.lead { font-size: 17px; line-height: 1.8; margin: 0; color: #515b4e; }
.download-row { margin-top: 24px; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.download { min-height: 48px; min-width: 208px; padding: 12px 24px; border: 1px solid #9ca695; border-radius: 4px; background: #e9eee6; color: #5b6655; font: inherit; font-size: 16px; text-align: center; }
.download:disabled { cursor: default; opacity: 1; }
.download.ready { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; color: #fff; background: #2b512b; border-color: #2b512b; }
.download.ready:hover { background: #1c3f1d; }
.download.ready:focus-visible { outline: 3px solid #be9442; outline-offset: 3px; }
.platform { color: #65705e; font-size: 13px; line-height: 1.6; }
.notice { margin: 12px 0 0; color: #66705f; font-size: 13px; line-height: 1.7; }
.product { margin: 8px 0 0; }
.product img { display: block; width: 100%; height: auto; aspect-ratio: 1360 / 860; object-fit: contain; background: #101410; }
figcaption { padding-top: 9px; color: #71806a; font-size: 12px; }
.details { margin-top: 36px; padding: 28px 0 36px; border-top: 1px solid #e0e5dc; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
h2 { margin: 0 0 10px; font-size: 16px; font-weight: 600; }
.details p { margin: 0; color: #5b6655; font-size: 14px; line-height: 1.9; overflow-wrap: anywhere; }
.footer { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid #e0e5dc; padding: 20px 0 28px; color: #71806a; font-size: 12px; }
@media (max-width: 640px) {
  .shell { width: calc(100% - 32px); }
  .brand { font-size: 15px; gap: 9px; min-height: 60px; }
  .channel { font-size: 12px; }
  .intro { padding-top: 32px; }
  h1 { font-size: 30px; }
  .lead { font-size: 15px; }
  .download-row { gap: 12px; margin-top: 20px; }
  .download { min-width: 200px; }
  .details { grid-template-columns: 1fr; gap: 24px; padding-top: 24px; margin-top: 28px; }
}