*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --cobalt: #1E7A4D;
  --cobalt-d: #0F3F2D;
  --sky: #3FA46B;
  --cyan: #8FE3B0;
  --frost: #F1F8F3;
  --white: #FFFFFF;
  --text: #163326;
  --muted: #536F60;
  --border: #CFE5D6;
  --light: #F8FCF9;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.9;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 32px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cobalt-d);
  font-weight: 800;
  white-space: nowrap;
}
.logo img { width: auto; height: 34px; }
.header-nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}
.header-nav a:hover { color: var(--cobalt); }
.hero {
  background:
    linear-gradient(90deg, rgba(4, 58, 43, 0.95) 0%, rgba(4, 58, 43, 0.82) 52%, rgba(4, 58, 43, 0.36) 100%),
    url('../assets/hero-bg.jpg') center / cover no-repeat;
  color: var(--white);
  padding: 116px 0 92px;
}
.breadcrumb {
  color: rgba(255,255,255,0.74);
  font-size: 0.82rem;
  margin-bottom: 28px;
}
.breadcrumb a { text-decoration: underline; text-underline-offset: 3px; }
.hero-label {
  display: block;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  margin-bottom: 18px;
}
h1 {
  max-width: 820px;
  font-size: clamp(2.1rem, 5vw, 4rem);
  line-height: 1.25;
  letter-spacing: 0;
  margin-bottom: 22px;
}
.hero-lead {
  max-width: 760px;
  color: rgba(255,255,255,0.86);
  font-size: 1rem;
}
.section { padding: 76px 0; }
.section.alt { background: var(--frost); }
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.block {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
  background: var(--white);
}
.block h2 {
  color: var(--cobalt-d);
  font-size: 1.35rem;
  line-height: 1.45;
  margin-bottom: 16px;
}
.block p,
.block li {
  color: var(--muted);
  font-size: 0.94rem;
}
.block ul {
  padding-left: 1.2em;
  display: grid;
  gap: 8px;
}
.price-box {
  margin-top: 24px;
  border-left: 4px solid var(--cobalt);
  background: var(--frost);
  padding: 22px 26px;
  border-radius: 4px;
}
.price-box strong {
  color: var(--cobalt-d);
  font-size: 1.2rem;
}
.cta {
  background: var(--cobalt-d);
  color: var(--white);
  padding: 68px 0;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.cta h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.45;
}
.cta p {
  color: rgba(255,255,255,0.78);
  margin-top: 10px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: 3px;
  background: var(--cyan);
  color: var(--cobalt-d);
  font-weight: 900;
  white-space: nowrap;
}
.related {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.related a {
  display: inline-flex;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--cobalt);
  font-size: 0.84rem;
  font-weight: 700;
}
.footer {
  background: #08291f;
  color: rgba(255,255,255,0.76);
  padding: 30px 0;
  font-size: 0.82rem;
}
.footer a { color: rgba(255,255,255,0.86); }
@media (max-width: 780px) {
  .container { padding: 0 22px; }
  .header-inner,
  .cta-inner { align-items: flex-start; flex-direction: column; }
  .header-nav { flex-wrap: wrap; gap: 12px; }
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 92px 0 76px; }
}