:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #1f2933;
  --text-muted: #5b6b7c;
  --border: #e3e8ef;
  --brand: #f6821f;
  --brand-dark: #d96f0f;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

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

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

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 600;
  font-size: 18px;
}

.nav-links {
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 72px 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 40px;
  line-height: 1.25;
}

.lead {
  max-width: 680px;
  margin: 0 0 28px;
  color: var(--text-muted);
  font-size: 17px;
}

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

.btn {
  display: inline-block;
  padding: 12px 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

.btn:hover {
  border-color: var(--brand);
  text-decoration: none;
}

.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px;
}

.section-alt {
  max-width: none;
  padding: 56px 24px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-alt > h2 {
  max-width: 1080px;
  margin: 0 auto 28px;
}

.section h2 {
  margin: 0 0 24px;
  font-size: 26px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  padding: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.steps {
  max-width: 1080px;
  margin: 0 auto;
  padding-left: 22px;
  display: grid;
  gap: 16px;
}

.steps h3 {
  margin: 0 0 4px;
  font-size: 17px;
}

.steps p {
  margin: 0;
  color: var(--text-muted);
}

code {
  padding: 2px 6px;
  background: #eef1f5;
  border-radius: 4px;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 13px;
}

.site-footer {
  padding: 28px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 30px;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}