*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Nunito Sans", "Avenir", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  color: #3a3f4b;
  background: #f6f8fb;
  -webkit-font-smoothing: antialiased;
}
a { color: #2ea3f2; text-decoration: none; transition: color .2s ease; }
a:hover { color: #0b5f99; text-decoration: underline; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #ffffff;
  border-bottom: 1px solid #e3e9f1;
  box-shadow: 0 2px 14px rgba(20, 40, 80, .06);
}
.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.brand {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #1c6fb0;
}
.main-nav { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.main-nav span {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #4b5563;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0e4f80 0%, #2ea3f2 100%);
  color: #ffffff;
  text-align: center;
  padding: 90px 24px 100px;
}
.hero h1 {
  max-width: 900px;
  margin: 0 auto;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.hero::after {
  content: "";
  display: block;
  width: 70px;
  height: 4px;
  margin: 28px auto 0;
  background: #ffffff;
  border-radius: 2px;
  opacity: .85;
}

/* Layout */
main { padding: 0 20px; }
.wrap { max-width: 920px; margin: 0 auto; }

article {
  position: relative;
  margin: -48px auto 40px;
  background: #ffffff;
  border-radius: 14px;
  padding: 48px 52px;
  box-shadow: 0 12px 40px rgba(20, 40, 80, .1);
  max-width: 920px;
}
article h2, article h3, article h4 {
  color: #14486f;
  line-height: 1.3;
  margin: 1.8em 0 .6em;
  font-weight: 800;
}
article h2 { font-size: 1.8rem; }
article h3 { font-size: 1.4rem; }
article h4 { font-size: 1.15rem; }
article > :first-child { margin-top: 0; }
article p { margin: 0 0 1.2em; }
article ul, article ol { padding-left: 1.4em; margin: 0 0 1.2em; }
article li { margin-bottom: .4em; }
article blockquote {
  margin: 1.5em 0;
  padding: 14px 22px;
  border-left: 4px solid #2ea3f2;
  background: #eef6fd;
  border-radius: 0 8px 8px 0;
}

.transition {
  max-width: 920px;
  margin: 0 auto 40px;
  padding: 32px 40px;
  background: #eaf4fc;
  border: 1px solid #cfe5f6;
  border-radius: 14px;
}
.transition p { margin: 0 0 1em; }
.transition p:last-child { margin-bottom: 0; }

.links-block {
  max-width: 920px;
  margin: 0 auto 70px;
  background: #ffffff;
  border: 1px solid #d9e4f0;
  border-top: 5px solid #2ea3f2;
  border-radius: 14px;
  padding: 36px 44px;
  box-shadow: 0 8px 28px rgba(20, 40, 80, .06);
  overflow: hidden;
}
.links-block h3 {
  margin: 1.6em 0 .6em;
  font-size: 1.25rem;
  font-weight: 800;
  color: #14486f;
  padding-bottom: 8px;
  border-bottom: 2px solid #e3edf7;
}
.links-block h3:first-child { margin-top: 0; }
.links-block ul {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  column-count: 2;
  column-gap: 40px;
}
.links-block li {
  break-inside: avoid;
  padding: 7px 0;
  border-bottom: 1px dashed #e1e8f0;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}
.links-block li a { font-weight: 600; }

/* Footer */
.site-footer {
  background: #0e2f4a;
  color: #b9cadb;
  text-align: center;
  padding: 36px 24px;
}
.site-footer .brand { color: #ffffff; font-size: 1.05rem; }
.site-footer p { margin: 8px 0 0; font-size: .9rem; }

/* Responsive */
@media (max-width: 768px) {
  body { font-size: 16px; }
  .header-inner { justify-content: center; text-align: center; }
  .main-nav { justify-content: center; }
  .hero { padding: 60px 20px 80px; }
  article { padding: 30px 24px; margin-top: -36px; }
  .transition { padding: 24px 22px; }
  .links-block { padding: 26px 22px; }
}
@media (max-width: 560px) {
  .links-block ul { column-count: 1; }
  article { padding: 24px 18px; }
}