:root {
  --primary: #2f7aa8;
  --primary-dark: #123f67;
  --teal: #58b8b2;
  --teal-light: #dff4f2;
  --light-bg: #f4f9fb;
  --text: #17242f;
  --text2: #526573;
  --border: #dbe9ef;
  --accent: #caa86a;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { overflow-x: hidden; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.9;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.topbar {
  background: var(--primary-dark);
  color: #fff;
  font-size: .78rem;
  padding: 6px 40px;
  display: flex;
  justify-content: flex-end;
  gap: 22px;
}
.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 72px;
  background: rgba(255,255,255,.96);
  box-shadow: 0 2px 16px rgba(15,63,103,.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo img {
  width: 56px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--primary-dark);
}
.logo small {
  display: block;
  color: var(--text2);
  font-size: .64rem;
  letter-spacing: .12em;
  line-height: 1.3;
}
.logo strong {
  display: block;
  font-family: 'Noto Serif JP', serif;
  color: var(--primary-dark);
  font-size: 1.12rem;
  line-height: 1.3;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  font-size: .84rem;
  color: var(--text2);
}
.nav-links a:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary-dark);
  color: #fff;
  border-radius: 999px;
  padding: 10px 20px;
  font-size: .82rem;
  font-weight: 700;
}
.page-hero {
  background:
    linear-gradient(100deg, rgba(18,63,103,.9), rgba(47,122,168,.68)),
    url('images/cha2_ph_space1.jpg') center/cover;
  color: #fff;
  padding: 84px 40px 96px;
}
.hero-inner,
.content,
.feature-nav,
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
}
.kicker {
  display: inline-block;
  color: var(--teal-light);
  font-weight: 700;
  letter-spacing: .22em;
  font-size: .78rem;
  margin-bottom: 16px;
}
h1 {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(2.1rem, 4vw, 4.2rem);
  line-height: 1.25;
  margin-bottom: 18px;
}
.hero-lead {
  max-width: 760px;
  font-size: 1rem;
  color: rgba(255,255,255,.9);
}
.content {
  padding: 72px 40px 86px;
}
.lead-panel {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 44px;
  align-items: center;
  margin-bottom: 56px;
}
.lead-text {
  background: var(--light-bg);
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  padding: 30px;
  color: var(--text2);
}
.lead-text strong { color: var(--primary-dark); }
.lead-image {
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(18,63,103,.14);
  background: var(--light-bg);
}
.lead-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}
.section-label {
  color: var(--teal);
  letter-spacing: .18em;
  font-weight: 700;
  font-size: .76rem;
  margin-bottom: 10px;
}
.section-title {
  font-family: 'Noto Serif JP', serif;
  color: var(--primary-dark);
  font-size: clamp(1.55rem, 2.7vw, 2.5rem);
  line-height: 1.45;
  margin-bottom: 28px;
}
.point-grid,
.equipment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.point-card,
.equipment-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 26px;
  box-shadow: 0 8px 28px rgba(18,63,103,.06);
}
.equipment-card {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  align-items: center;
}
.equipment-card img {
  width: 150px;
  height: 150px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--light-bg);
}
.point-card h3,
.equipment-card h3 {
  font-family: 'Noto Serif JP', serif;
  color: var(--primary-dark);
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.55;
}
.point-card p,
.equipment-card p {
  color: var(--text2);
  font-size: .9rem;
}
.image-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}
.image-row img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
}
.feature-nav {
  padding: 0 40px 80px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.feature-nav a {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 13px 16px;
  text-align: center;
  color: var(--primary-dark);
  font-weight: 700;
  font-size: .84rem;
  background: #fff;
}
.feature-nav a:hover {
  background: var(--primary-dark);
  color: #fff;
}
.back-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
  background: #fff;
  color: var(--primary-dark);
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(18,63,103,.18);
}
footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.78);
  padding: 42px 40px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  font-size: .82rem;
}
.footer-name {
  font-family: 'Noto Serif JP', serif;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
}
@media (max-width: 900px) {
  .topbar { display: none; }
  .site-nav { height: auto; padding: 14px 20px; align-items: flex-start; gap: 14px; flex-wrap: wrap; }
  .nav-links { display: none; }
  .nav-cta { white-space: nowrap; padding: 9px 14px; font-size: .76rem; }
  .page-hero { padding: 56px 22px 64px; }
  .content { padding: 50px 20px 64px; }
  .lead-panel,
  .point-grid,
  .equipment-grid,
  .feature-nav,
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .lead-image img { height: 260px; }
  .equipment-card { grid-template-columns: 110px 1fr; padding: 20px; }
  .equipment-card img { width: 110px; height: 110px; }
  .image-row { grid-template-columns: 1fr; }
  .image-row img { height: 230px; }
  .feature-nav { padding: 0 20px 60px; }
}
@media (max-width: 520px) {
  .site-nav { flex-direction: column; align-items: flex-start; }
  .logo strong { font-size: 1rem; }
  .logo small { font-size: .58rem; }
  .nav-cta { align-self: flex-start; }
}