* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #101828;
  background: #f3f6fb;
}
.download-page {
  width: min(920px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 56px 0;
}
.hero {
  padding: 34px;
  border: 1px solid #dfe7f3;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(16, 24, 40, .08);
}
.brand {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 6px 10px;
  border-radius: 6px;
  color: #175cd3;
  background: #e8f0ff;
  font-weight: 700;
}
h1 {
  margin: 0 0 12px;
  font-size: 34px;
  line-height: 1.2;
}
p {
  margin: 0;
  color: #475467;
  line-height: 1.7;
}
.version {
  margin: 22px 0 16px;
  color: #344054;
  font-weight: 600;
}
.primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  min-height: 46px;
  border-radius: 6px;
  color: #fff;
  background: #2563eb;
  text-decoration: none;
  font-weight: 700;
}
.primary.disabled {
  background: #98a2b3;
  pointer-events: none;
}
.hint {
  margin-top: 14px;
  font-size: 14px;
}
.notes {
  margin-top: 18px;
  padding: 24px;
  border-radius: 8px;
  background: #fff;
}
.notes h2 {
  margin: 0 0 12px;
  font-size: 20px;
}
.notes ul {
  margin: 0;
  padding-left: 20px;
  color: #475467;
  line-height: 1.9;
}
@media (max-width: 640px) {
  .download-page { width: calc(100vw - 24px); padding: 24px 0; }
  .hero { padding: 24px; }
  h1 { font-size: 28px; }
  .primary { width: 100%; }
}