:root {
  --ink: #172126;
  --muted: #65737b;
  --line: #dde6e8;
  --surface: #ffffff;
  --surface-soft: #f3f8f8;
  --surface-tint: #eef6f3;
  --accent: #118a7e;
  --accent-deep: #0a5e58;
  --coral: #d96c56;
  --shadow: 0 24px 70px rgba(18, 42, 46, 0.14);
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fbfcfb;
  font-family: Inter, "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 0 56px;
  border-bottom: 1px solid rgba(221, 230, 232, 0.9);
  background: rgba(251, 252, 251, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(17, 138, 126, 0.2);
  border-radius: 8px;
  background: #e8f4f1;
  color: var(--accent-deep);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-nav a {
  transition: color 180ms ease;
}

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

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}

.menu-button-line {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px 0;
  background: currentColor;
}

.section-shell {
  width: min(100% - 48px, var(--max-width));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  align-items: center;
  gap: 72px;
  min-height: calc(100vh - 76px);
  padding: 82px 0 64px;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: 4.4rem;
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 3rem;
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.08rem;
  line-height: 1.35;
}

.hero-text {
  max-width: 650px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 1.12rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(17, 138, 126, 0.24);
  border-radius: 8px;
  background: var(--surface-tint);
  color: var(--accent-deep);
  font-size: 0.86rem;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.94rem;
  font-weight: 800;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  border-color: var(--accent-deep);
  background: var(--accent-deep);
  color: #ffffff;
}

.button.secondary {
  background: var(--surface);
  color: var(--ink);
}

.hero-visual {
  justify-self: end;
  width: min(100%, 520px);
  padding: 14px;
  border: 1px solid rgba(221, 230, 232, 0.96);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 5;
  height: auto;
  border-radius: 6px;
  object-fit: cover;
  object-position: center;
}

.company {
  padding: 86px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: 38px;
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.profile-grid div {
  min-height: 140px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.profile-grid dt {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.profile-grid dd {
  margin: 0;
  font-size: 1.03rem;
  font-weight: 700;
}

.service-band {
  background: #172126;
  color: #ffffff;
}

.service-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 80px;
  padding: 88px 0;
}

.service-layout .eyebrow {
  color: #8fded1;
}

.service-copy {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.08rem;
}

.service-copy p {
  margin-bottom: 18px;
}

.service-copy p:last-child {
  margin-bottom: 0;
}

.service-subtitle {
  color: #ffffff;
  font-size: 1.42rem;
  font-weight: 800;
}

.features {
  padding: 90px 0 100px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  min-height: 190px;
  padding: 24px 24px 24px 82px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-number {
  position: absolute;
  top: 24px;
  left: 24px;
  color: rgba(17, 138, 126, 0.34);
  font-size: 1.28rem;
  font-weight: 800;
  line-height: 1;
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-top: 30px;
  border-radius: 8px;
  background: var(--surface-tint);
  color: var(--accent-deep);
}

.feature-icon svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.contact-band {
  background: var(--surface-soft);
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  align-items: center;
  gap: 72px;
  padding: 70px 0;
}

.contact-layout p {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.contact-emails {
  display: grid;
  gap: 8px;
}

.contact-layout a {
  color: var(--accent-deep);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer {
  padding: 28px 20px;
  border-top: 1px solid var(--line);
  background: #fbfcfb;
  color: var(--muted);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 28px;
  }

  .hero,
  .service-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero {
    min-height: auto;
    padding: 66px 0;
  }

  h1 {
    font-size: 3.3rem;
  }

  h2 {
    font-size: 2.35rem;
  }

  .hero-visual {
    justify-self: stretch;
    max-width: 560px;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 66px;
    padding: 0 20px;
  }

  .brand span:last-child {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .menu-button {
    display: grid;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 16px 38px rgba(25, 32, 37, 0.14);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 10px;
  }

  .section-shell {
    width: min(100% - 32px, var(--max-width));
  }

  h1 {
    font-size: 2.55rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .profile-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .profile-grid div {
    min-height: auto;
  }

  .feature-card {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 64px 22px 24px;
  }

  .feature-icon {
    margin-top: 0;
  }
}