:root {
  --bg: #edf4fb;
  --panel: #ffffff;
  --panel-soft: #f7fbff;
  --ink: #0f1722;
  --muted: #4b5a6b;
  --accent: #006fb9;
  --accent-strong: #005691;
  --accent-deep: #003b6f;
  --line: #d7e5f3;
  --shadow: 0 22px 60px rgba(0, 73, 128, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 0% 0%, rgba(0, 111, 185, 0.18) 0, transparent 34%),
    radial-gradient(circle at 100% 20%, rgba(117, 194, 255, 0.18) 0, transparent 24%),
    linear-gradient(180deg, #f7fbff 0%, #edf4fb 100%),
    var(--bg);
  font-family: "Segoe UI", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
}

.container {
  width: min(900px, 92vw);
  margin: 0 auto;
}

.topband {
  height: 8px;
  background: linear-gradient(90deg, var(--accent-deep) 0%, var(--accent) 55%, #34a7e8 100%);
}

.hero {
  border-bottom: 1px solid var(--line);
  background: #ffffff;
  padding: 2.4rem 0 2.6rem;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.8);
  text-align: center;
}

.brand-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.55rem;
}

.brand-logo {
  width: 50%;
  height: auto;
  display: block;
  margin: auto;
  filter: drop-shadow(0 10px 18px rgba(0, 73, 128, 0.16));
}

.brand-logo-shell {
  width: clamp(124px, 16vw, 168px);
  display: block;
}

h1 {
  margin: 0;
  line-height: 1.08;
  font-size: clamp(1.8rem, 3vw, 3rem);
  max-width: 32ch;
  margin-inline: auto;
  text-wrap: balance;
}

.authors,
.affiliations,
.contacts,
.hero-links {
  margin: 0.9rem 0 0;
  color: var(--muted);
}

.authors {
  font-weight: 600;
}

.contacts,
.affiliations,
.authors,
.hero-links {
  text-align: center;
}

.hero-links {
  font-weight: 600;
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.72rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: linear-gradient(180deg, #0082d8 0%, var(--accent) 100%);
  color: #ffffff;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(0, 111, 185, 0.18);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.hero-button:hover {
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(0, 111, 185, 0.24);
  background: linear-gradient(180deg, #0a8ee8 0%, var(--accent-strong) 100%);
}

.hero-button-secondary {
  background: #ffffff;
  color: var(--accent-strong);
  border-color: #b8d5ee;
  box-shadow: 0 10px 24px rgba(0, 73, 128, 0.08);
}

.hero-button-secondary:hover {
  color: var(--accent-deep);
  background: #f6fbff;
  box-shadow: 0 14px 28px rgba(0, 73, 128, 0.12);
}

.content {
  padding: 2rem 0;
}

section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.4rem 1.3rem;
  margin-bottom: 1.2rem;
  box-shadow: var(--shadow);
  animation: rise 500ms ease both;
}

.feature-figure,
.gallery-card {
  margin: 1rem 0 0;
}

.feature-figure img,
.gallery-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
}

.gallery-card img + img {
  margin-top: 0.85rem;
}

.feature-figure {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.gallery {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.gallery-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

section:nth-of-type(2) {
  animation-delay: 90ms;
}

h2 {
  margin: 0 0 0.6rem;
  color: var(--accent);
  letter-spacing: 0.01em;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

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

.footer {
  color: var(--muted);
  font-size: 0.95rem;
  padding: 0.2rem 0 2rem;
  text-align: center;
}

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

.footer a:hover {
  color: #3f4c5c;
}

@keyframes rise {
  from {
    transform: translateY(6px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 2rem;
  }

  .brand-row {
    align-items: center;
  }

  .brand-logo {
    width: 50%;
  }

  .brand-logo-shell {
    width: 144px;
  }

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

  .contacts,
  .affiliations,
  .authors,
  .hero-links {
    font-size: 0.98rem;
  }
}