:root {
  --color-white: #ffffff;
  --color-bg: #f7f7f5;
  --color-text: #17181a;
  --color-muted: #676b72;
  --color-line: #dcdeda;
  --color-dark: #17191d;
  --color-accent: #2764d8;
  --container: 1180px;
  --side-padding: clamp(1.25rem, 4vw, 3rem);
  --section-space: clamp(5rem, 10vw, 9rem);
  --radius: 1rem;
  font-family:
    Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo,
    sans-serif;
  color: var(--color-text);
  background: var(--color-white);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible,
summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-accent) 50%, transparent);
  outline-offset: 4px;
  border-radius: 0.25rem;
}

.container {
  width: min(100%, calc(var(--container) + var(--side-padding) * 2));
  margin-inline: auto;
  padding-inline: var(--side-padding);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.6rem 1rem;
  color: var(--color-white);
  background: var(--color-accent);
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(220, 222, 218, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  position: relative;
  display: flex;
  width: min(100%, calc(var(--container) + var(--side-padding) * 2));
  min-height: 4.5rem;
  margin-inline: auto;
  padding-inline: var(--side-padding);
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 1.85rem;
  height: 1.85rem;
  color: var(--color-white);
  background: var(--color-dark);
  border-radius: 0.42rem;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 800;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
}

.desktop-nav a,
.back-link {
  color: #45494f;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.desktop-nav a:hover,
.back-link:hover {
  color: var(--color-accent);
}

.mobile-menu {
  display: none;
}

.hero {
  min-height: calc(100svh - 4.5rem);
  background:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px),
    var(--color-white);
  background-position: center;
  background-size: 80px 80px;
}

.hero-inner {
  display: flex;
  min-height: calc(100svh - 4.5rem);
  padding-block: 7rem;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.eyebrow,
.section-number {
  margin: 0 0 1.5rem;
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3.5rem, 10vw, 8.5rem);
  line-height: 0.94;
  letter-spacing: -0.075em;
}

.hero-copy {
  margin: 2.25rem 0 0;
  font-size: clamp(1.45rem, 3.2vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.hero-description {
  margin: 0.45rem 0 0;
  color: var(--color-muted);
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
}

.text-link {
  display: inline-flex;
  margin-top: 3rem;
  padding-bottom: 0.2rem;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid var(--color-text);
  font-size: 0.82rem;
  font-weight: 700;
}

.section {
  padding-block: var(--section-space);
}

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

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.section h2,
.policy-header h1 {
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.body-copy {
  max-width: 42rem;
  color: var(--color-muted);
}

.body-copy p {
  margin: 0 0 1.5rem;
}

.body-copy .lead {
  color: var(--color-text);
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 600;
  line-height: 1.65;
  letter-spacing: -0.025em;
}

.section-heading {
  display: flex;
  margin-bottom: clamp(3rem, 6vw, 5rem);
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
}

.section-heading > p {
  max-width: 24rem;
  margin: 0 0 0.6rem;
  color: var(--color-muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.service-card {
  min-height: 21rem;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.card-index {
  display: block;
  margin-bottom: 5rem;
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
}

.service-card h3 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.service-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.product-list {
  border-top: 1px solid var(--color-line);
}

.product-row {
  display: grid;
  padding-block: 2rem;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.5rem;
  border-bottom: 1px solid var(--color-line);
}

.product-mark {
  display: grid;
  width: 4rem;
  height: 4rem;
  color: var(--color-accent);
  background: #eef3ff;
  border-radius: 1rem;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.product-content h3 {
  margin: 0 0 0.2rem;
  font-size: 1.2rem;
  letter-spacing: -0.025em;
}

.product-content p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.status {
  padding: 0.45rem 0.8rem;
  color: #5d6268;
  background: var(--color-bg);
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  white-space: nowrap;
}

.status-active {
  color: #164caf;
  background: #eaf1ff;
}

.section-dark {
  color: var(--color-white);
  background: var(--color-dark);
}

.section-dark .section-number {
  color: #75a4ff;
}

.business-note {
  max-width: 27rem;
  margin-top: 2rem;
  color: #aeb2b9;
}

.business-list {
  margin: 0;
  border-top: 1px solid #3a3d43;
}

.business-list div {
  display: grid;
  padding-block: 1.25rem;
  grid-template-columns: minmax(8rem, 0.8fr) minmax(0, 1.2fr);
  gap: 1rem;
  border-bottom: 1px solid #3a3d43;
}

.business-list dt {
  color: #9398a1;
  font-size: 0.75rem;
  font-weight: 600;
}

.business-list dd {
  margin: 0;
  font-size: 0.9rem;
}

.business-list a,
.policy-content a {
  color: #75a4ff;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.contact-section {
  text-align: center;
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-inner > p:not(.section-number) {
  margin: 1.5rem 0 2.5rem;
  color: var(--color-muted);
}

.contact-link {
  display: inline-flex;
  padding-bottom: 0.3rem;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 2px solid var(--color-accent);
  font-size: clamp(1rem, 3.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
}

.contact-link:hover {
  color: var(--color-accent);
}

.site-footer {
  padding-block: 3.5rem;
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 2rem;
}

.footer-brand {
  font-size: 0.95rem;
  font-weight: 800;
}

.footer-inner p {
  margin: 0.45rem 0 0;
  color: var(--color-muted);
  font-size: 0.72rem;
}

.footer-inner nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.78rem;
  font-weight: 600;
}

.footer-inner nav a:hover {
  color: var(--color-accent);
}

.copyright {
  grid-column: 1 / -1;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
}

.policy-main {
  min-height: 70vh;
}

.policy-article {
  padding-block: clamp(5rem, 10vw, 8rem);
}

.policy-header {
  padding-bottom: clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--color-line);
}

.policy-header > p:last-child {
  margin: 1.25rem 0 0;
  color: var(--color-muted);
}

.policy-content {
  max-width: 48rem;
  margin: clamp(3rem, 7vw, 5rem) auto 0;
  color: #42464c;
}

.policy-content > p:first-child {
  margin-top: 0;
  color: var(--color-text);
  font-size: 1.05rem;
}

.policy-content section {
  margin-top: 3.5rem;
}

.policy-content h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.policy-content p {
  margin-block: 0.75rem;
}

.policy-date {
  margin-top: 4rem !important;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: right;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (max-width: 800px) {
  .desktop-nav {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .mobile-menu summary {
    display: flex;
    width: 2.75rem;
    height: 2.75rem;
    cursor: pointer;
    list-style: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
  }

  .mobile-menu summary::-webkit-details-marker {
    display: none;
  }

  .menu-line {
    display: block;
    width: 1.25rem;
    height: 1px;
    background: var(--color-text);
  }

  .mobile-menu nav {
    position: absolute;
    top: 4.5rem;
    right: 0;
    left: 0;
    display: flex;
    padding: 1.25rem var(--side-padding) 1.5rem;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    gap: 0;
  }

  .mobile-menu nav a {
    padding-block: 0.8rem;
    border-bottom: 1px solid var(--color-line);
    font-size: 0.9rem;
    font-weight: 600;
  }

  .mobile-menu nav a:last-child {
    border-bottom: 0;
  }

  .hero {
    background-size: 56px 56px;
  }

  .hero-inner {
    min-height: 42rem;
    padding-block: 5rem;
  }

  .split-layout,
  .business-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 1.5rem;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 16rem;
  }

  .card-index {
    margin-bottom: 3.5rem;
  }
}

@media (max-width: 560px) {
  .product-row {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1rem;
  }

  .status {
    grid-column: 2;
    justify-self: start;
  }

  .business-list div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-inner nav {
    flex-direction: column;
    gap: 0.75rem;
  }

  .copyright {
    grid-column: 1;
  }
}