:root {
  color-scheme: light;
  --ink: #152238;
  --muted: #667085;
  --line: #e7eaf0;
  --brand: #1f5eff;
  --surface: rgba(255, 255, 255, 0.94);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #f4f7fb;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 12%, rgba(31, 94, 255, 0.12), transparent 32rem),
    linear-gradient(180deg, #f8faff 0%, #eef3fa 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.page-shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(72px, 12vh, 140px) 0 40px;
}

.card {
  padding: clamp(32px, 6vw, 64px);
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(38, 58, 92, 0.12);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(38px, 8vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.2;
}

.intro {
  max-width: 600px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.85;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.facts div {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fbfcff;
}

.facts span,
.facts strong {
  display: block;
}

.facts span {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.facts strong {
  overflow-wrap: anywhere;
  font-size: 16px;
}

.button {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  border-radius: 12px;
  color: #fff;
  background: var(--brand);
  text-decoration: none;
  font-weight: 700;
}

.button-muted {
  color: #475467;
  background: #eef2f7;
  cursor: default;
}

.download-section {
  margin-top: 46px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}

.section-note {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.download-item {
  display: flex;
  min-height: 196px;
  flex-direction: column;
  align-items: flex-start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fbfcff;
}

.download-item h3 {
  margin: 0;
  font-size: 20px;
}

.download-item p {
  flex: 1;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.download-item .button {
  margin-top: 18px;
  font-size: 14px;
}

.site-actions {
  margin-top: 24px;
}

footer {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 38px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  line-height: 1.7;
}

footer p {
  margin: 4px 0;
}

footer a {
  color: inherit;
  text-underline-offset: 3px;
}

@media (max-width: 560px) {
  .facts {
    grid-template-columns: 1fr;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }

  .card {
    border-radius: 22px;
  }
}