:root {
  --color-text: #1f2933;
  --color-muted: #5c6670;
  --color-border: #d9dee4;
  --color-soft: #f5f7f8;
  --color-accent: #28666e;
  --color-accent-dark: #17484e;
  --color-warm: #8a5a2b;
  --color-white: #ffffff;
  --shadow-subtle: 0 18px 45px rgba(31, 41, 51, 0.08);
  --container: 1120px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-warm);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(40, 102, 110, 0.35);
  outline-offset: 4px;
}

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

h1,
h2,
h3 {
  line-height: 1.35;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.75rem, 7vw, 5.75rem);
  font-weight: 700;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.7rem, 4vw, 2.45rem);
  font-weight: 650;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.08rem;
  font-weight: 650;
}

p {
  margin-bottom: 1rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
}

li + li {
  margin-top: 0.4rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 0.75rem;
  z-index: 20;
  transform: translateY(-150%);
  background: var(--color-text);
  color: var(--color-white);
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.narrow {
  width: min(100% - 2rem, 820px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 76px;
  padding-block: 0.8rem;
}

.site-name {
  display: inline-flex;
  flex-direction: column;
  min-width: max-content;
  color: var(--color-text);
  text-decoration: none;
}

.site-name-en {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}

.site-name-ja {
  color: var(--color-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem 1.05rem;
}

.site-nav a {
  color: var(--color-text);
  font-size: 0.92rem;
  line-height: 1.4;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent-dark);
  text-decoration: underline;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.28em;
}

.hero {
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, rgba(40, 102, 110, 0.08), rgba(138, 90, 43, 0.06)),
    var(--color-white);
}

.hero-inner {
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(5rem, 12vw, 8rem);
}

.eyebrow,
.section-label {
  margin-bottom: 0.8rem;
  color: var(--color-accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.4;
  text-transform: uppercase;
}

.hero-lead {
  max-width: 820px;
  color: var(--color-text);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.section {
  padding-block: clamp(4rem, 8vw, 6.5rem);
}

.section-muted {
  background: var(--color-soft);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(180px, 0.85fr) minmax(0, 2fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.section-body {
  max-width: 760px;
  color: var(--color-muted);
}

.section-body p:last-child {
  margin-bottom: 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section-heading p:last-child {
  color: var(--color-muted);
}

.business-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.business-item {
  min-height: 100%;
  padding: 1.4rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-subtle);
}

.business-item p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.company-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.company-list {
  margin: 0;
}

.company-list div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  border-bottom: 1px solid var(--color-border);
}

.company-list div:last-child {
  border-bottom: 0;
}

.company-list dt,
.company-list dd {
  margin: 0;
  padding: 1rem 1.15rem;
}

.company-list dt {
  background: var(--color-soft);
  color: var(--color-muted);
  font-weight: 650;
}

.company-list dd {
  overflow-wrap: anywhere;
}

.section-contact {
  background: #fbfaf8;
  border-top: 1px solid var(--color-border);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(180px, 0.85fr) minmax(0, 2fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.mail-link {
  display: inline-block;
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  font-weight: 650;
}

.page-hero {
  padding-block: clamp(4.5rem, 9vw, 7rem);
  background:
    linear-gradient(135deg, rgba(40, 102, 110, 0.08), rgba(138, 90, 43, 0.05)),
    var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.page-hero p {
  color: var(--color-muted);
}

.updated-date {
  margin-top: 1.5rem;
  margin-bottom: 0;
  color: var(--color-text);
  font-weight: 650;
}

.policy-section {
  padding-top: clamp(3rem, 6vw, 4.5rem);
}

.policy-item {
  padding-block: 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

.policy-item:first-child {
  padding-top: 0;
}

.policy-item:last-child {
  border-bottom: 0;
}

.policy-item h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.25rem, 3vw, 1.55rem);
}

.policy-item p,
.policy-item li {
  color: var(--color-muted);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.78);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.35rem;
  font-size: 0.9rem;
}

.footer-inner p {
  margin: 0;
}

.footer-company {
  margin-right: 0.6rem;
  color: var(--color-white);
  font-weight: 700;
}

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

@media (max-width: 900px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero-inner {
    min-height: 440px;
  }

  .content-grid,
  .contact-inner {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .container,
  .narrow {
    width: min(100% - 1.25rem, var(--container));
  }

  .site-header {
    position: static;
  }

  .header-inner {
    min-height: auto;
  }

  .site-nav {
    gap: 0.45rem 0.85rem;
  }

  .site-nav a {
    font-size: 0.9rem;
  }

  .hero-inner {
    min-height: 380px;
    padding-block: 4rem;
  }

  .business-list {
    grid-template-columns: 1fr;
  }

  .company-list div {
    grid-template-columns: 1fr;
  }

  .company-list dt {
    padding-bottom: 0.2rem;
  }

  .company-list dd {
    padding-top: 0.35rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}