:root {
  --ink: #192025;
  --muted: #66727c;
  --line: #dfe5ea;
  --surface: #ffffff;
  --surface-soft: #f5f7f8;
  --accent: #b0243a;
  --accent-deep: #7f1727;
  --gold: #c39a58;
  --shadow: 0 22px 60px rgba(25, 32, 37, 0.12);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  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: 72px;
  padding: 0 clamp(20px, 5vw, 56px);
  border-bottom: 1px solid rgba(223, 229, 234, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(127, 23, 39, 0.18);
  background: #fbf7f2;
  color: var(--accent-deep);
  font-size: 0.8rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.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);
  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% - 40px, var(--max-width));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  gap: clamp(36px, 7vw, 88px);
  min-height: calc(100vh - 72px);
  padding: clamp(64px, 9vw, 108px) 0 clamp(54px, 7vw, 84px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(2.65rem, 6vw, 5.4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 3.2vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.08rem;
  line-height: 1.35;
}

.hero-text {
  max-width: 680px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: clamp(1.04rem, 1.5vw, 1.2rem);
}

.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);
  font-size: 0.94rem;
  font-weight: 700;
  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%, 430px);
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid rgba(223, 229, 234, 0.96);
  background:
    linear-gradient(135deg, rgba(195, 154, 88, 0.14), rgba(176, 36, 58, 0.08)),
    #fbfbfa;
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  height: auto;
}

.company {
  padding: clamp(64px, 9vw, 110px) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: clamp(28px, 4vw, 46px);
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
}

.profile-grid div {
  padding: 28px 28px 28px 0;
  border-bottom: 1px solid var(--line);
}

.profile-grid dt {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
  text-transform: uppercase;
}

.profile-grid dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.service-band {
  background: var(--surface-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(28px, 7vw, 88px);
  padding: clamp(64px, 9vw, 110px) 0;
}

.service-copy {
  color: #3e484f;
  font-size: 1.05rem;
}

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

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

.service-subtitle {
  color: var(--accent-deep);
  font-size: 1.36rem;
  font-weight: 700;
}

.features {
  padding: clamp(64px, 9vw, 112px) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 26px;
  background: #fbf7f2;
  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: 0.96rem;
}

.contact-band {
  background: var(--ink);
  color: #ffffff;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  align-items: center;
  gap: clamp(24px, 5vw, 72px);
  padding: clamp(52px, 8vw, 88px) 0;
}

.contact-layout .eyebrow {
  color: #e8c586;
}

.contact-layout p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.08rem;
}

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

.contact-layout a {
  color: #ffffff;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer {
  padding: 28px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.62);
  text-align: center;
}

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

@media (max-width: 920px) {
  .hero,
  .service-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    justify-self: stretch;
    max-width: 480px;
  }

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

@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);
    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: 2.72rem;
  }

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

  .button {
    width: 100%;
  }

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

  .profile-grid div {
    padding-right: 0;
  }

  .feature-card {
    min-height: auto;
  }
}