:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-muted: #eef3f8;
  --text: #151922;
  --muted: #667085;
  --border: #d7dee8;
  --brand: #1168d8;
  --brand-strong: #0c4fa8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--brand);
}

.page-shell {
  width: min(100% - 32px, 720px);
  margin: 0 auto;
  padding: 32px 0 16px;
}

.hero {
  min-height: 42vh;
  display: grid;
  align-content: center;
  gap: 10px;
  padding: 16px 0 28px;
}

.logo {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.eyebrow {
  margin: 8px 0 0;
  color: var(--brand);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 42px;
  line-height: 1.08;
}

h2 {
  font-size: 20px;
  line-height: 1.3;
}

.lead {
  margin: 0;
  max-width: 520px;
  color: var(--muted);
  font-size: 18px;
}

.section {
  padding: 18px 0;
  border-top: 1px solid var(--border);
}

.download-grid {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.download-item {
  min-height: 56px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  text-decoration: none;
}

.download-item span {
  color: var(--text);
  font-weight: 700;
}

.download-item strong {
  color: var(--muted);
  font-size: 14px;
}

.download-item.primary {
  border-color: #7fb0ec;
}

.download-item.primary strong {
  color: var(--brand-strong);
}

.download-item.disabled {
  background: var(--surface-muted);
}

.meta {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.link-section {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.link-section a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  text-decoration: none;
}

.site-footer {
  width: min(100% - 32px, 720px);
  margin: 0 auto;
  padding: 14px 0 28px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 430px) {
  .page-shell {
    width: min(100% - 24px, 720px);
    padding-top: 22px;
  }

  .hero {
    min-height: 38vh;
    padding-bottom: 22px;
  }

  h1 {
    font-size: 36px;
  }

  .lead {
    font-size: 16px;
  }

  .download-item {
    align-items: flex-start;
    flex-direction: column;
  }
}