:root {
  color-scheme: light dark;
  --bg: #f6f9ff;
  --panel: #ffffff;
  --panel-soft: #f8fbff;
  --text: #111827;
  --muted: #5f6f86;
  --line: #dce8f7;
  --accent: #1677ff;
  --accent-2: #15a37d;
  --shadow: 0 22px 60px rgba(33, 85, 145, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151f;
    --panel: #171f2d;
    --panel-soft: #121a26;
    --text: #eef4ff;
    --muted: #a9b7cc;
    --line: #2a3a51;
    --accent: #75b7ff;
    --accent-2: #5eead4;
    --shadow: none;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 88% 8%, rgba(21, 163, 125, 0.14), transparent 280px),
    radial-gradient(circle at 8% 0%, rgba(22, 119, 255, 0.16), transparent 320px),
    var(--bg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

main {
  width: min(100% - 40px, 880px);
  margin: 0 auto;
  padding: 44px 0;
}

.hero,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
}

.hero {
  padding: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.1;
}

h2 {
  margin-top: 32px;
  font-size: 24px;
  line-height: 1.25;
}

h3 {
  margin-top: 22px;
  font-size: 18px;
  line-height: 1.35;
}

p,
li {
  color: var(--muted);
}

.lead {
  max-width: 680px;
  margin-top: 16px;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel-soft);
  font-weight: 800;
}

.button.primary {
  color: #ffffff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card,
.panel {
  padding: 26px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.card h2 {
  margin-top: 0;
  font-size: 22px;
}

.muted {
  color: var(--muted);
}

.email {
  display: inline-flex;
  margin: 10px 0;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  font-size: 18px;
  font-weight: 800;
}

.top-nav,
footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 18px;
  color: var(--muted);
}

.top-nav {
  margin-bottom: 18px;
  font-weight: 800;
}

.top-nav div,
footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.panel {
  margin-top: 18px;
}

.panel p,
.panel ul,
.panel ol {
  margin: 8px 0 0;
}

.panel ul,
.panel ol {
  padding-left: 22px;
}

footer {
  margin-top: 24px;
  font-size: 14px;
}

@media (max-width: 640px) {
  main {
    width: min(100% - 28px, 880px);
    padding: 28px 0;
  }

  .hero,
  .card,
  .panel {
    padding: 22px;
  }

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

  .top-nav,
  footer {
    flex-direction: column;
  }
}