:root {
  --deep: #0f2d3d;
  --blue-l: #368ebb;
  --cyan: #6bc1e2;
  --amber: #ffc857;
  --canvas: #f4f8fb;
  --fog: #e7f2f7;
  --ink: #486478;
  --border: #e0ebf1;
  --maxw: 760px;
  --page-pad: clamp(16px, 4vw, 24px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  background: var(--canvas);
  color: var(--deep);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-l); }
a:hover { color: var(--deep); }

:focus-visible {
  outline: 2.5px solid var(--blue-l);
  outline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: #fff;
  padding: 16px var(--page-pad);
}

.site-header-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.03em;
  color: var(--deep);
  text-decoration: none;
}

.logo .accent { color: var(--blue-l); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 15px;
  text-decoration: none;
  background: linear-gradient(135deg, #6bc1e2, #368ebb 55%, #1f6e97);
  color: #fff;
}

.breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px var(--page-pad) 0;
  font-size: 14px;
  color: var(--ink);
}

.breadcrumb a { color: var(--ink); text-decoration: none; }
.breadcrumb a:hover { color: var(--blue-l); }

.article {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px var(--page-pad) 64px;
}

.article h1 {
  font-size: clamp(1.75rem, 3vw + 1rem, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.article .lead {
  font-size: 1.125rem;
  color: var(--ink);
  margin-bottom: 32px;
}

.article h2 {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 36px 0 12px;
  letter-spacing: -0.02em;
}

.article p { margin-bottom: 16px; }

.article ul, .article ol {
  margin: 0 0 16px 1.25rem;
}

.article li { margin-bottom: 8px; }

.cta-box {
  margin-top: 40px;
  padding: 28px;
  border-radius: 16px;
  background: linear-gradient(160deg, #1b4a66, #0f2d3d);
  color: #fff;
}

.cta-box h2 {
  color: #fff;
  margin-top: 0;
  font-size: 1.35rem;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 20px;
}

.cta-box .btn {
  background: #fff;
  color: var(--deep);
}

.related {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.related h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.related ul {
  list-style: none;
  margin: 0;
}

.related li { margin-bottom: 8px; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px var(--page-pad);
  font-size: 14px;
  color: var(--ink);
  text-align: center;
}

.site-footer a { color: var(--ink); }