:root {
  --color-background: #f1f5f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #475569;
  --color-text-subtle: #64748b;
  --color-text-disabled: #94a3b8;
  --color-accent: #0f172a;
  --max-width: 64rem;
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --radius-sm: 0.75rem;
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.08);
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', 'Hiragino Sans', 'Meiryo', sans-serif;
  color: var(--color-text);
  background: linear-gradient(180deg, #ffffff 0%, var(--color-background) 100%);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent);
}
.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
}

.brand-badge {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

@media (min-width: 640px) {
  .site-nav {
    display: flex;
  }
}
.language-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.language-button {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.375rem 0.75rem;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.language-button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.language-button[aria-pressed="true"] {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.pill-disabled {
  display: inline-block;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-disabled);
  cursor: not-allowed;
  user-select: none;
}

main {
  flex: 1 0 auto;
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1rem;
}

.section--hero {
  padding-top: 4rem;
  padding-bottom: 2.5rem;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 640px) {
  .hero-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.hero-title {
  font-size: clamp(2.25rem, 3vw + 1rem, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.hero-text {
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.button {
  display: inline-block;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: opacity 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.button + .button {
  margin-left: 0.5rem;
}

.button-group {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button--primary {
  background: var(--color-accent);
  color: #fff;
}

.button--primary:hover {
  opacity: 0.9;
}

.button--secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.button--secondary:hover {
  border-color: var(--color-accent);
}

.note {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}
.hero-visual {
  position: relative;
}

.hero-visual-card {
  aspect-ratio: 4 / 3;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--shadow-sm);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1.5rem;
}

.hero-visual-logo {
  display: grid;
  place-items: center;
  width: 4rem;
  height: 4rem;
  margin: 0 auto;
  border-radius: 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
}

.hero-visual-note {
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
}
h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: inherit;
}

p {
  margin: 0;
}

p + p {
  margin-top: 0.75rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-description {
  margin-top: 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.product-card {
  border-radius: calc(var(--radius-lg) + 0.5rem);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .product-card {
    padding: 2.5rem;
  }
}

.product-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
}

.product-summary {
  min-width: 16rem;
  max-width: 22rem;
}

.product-summary p {
  margin-top: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.product-list {
  margin-top: 1rem;
  padding-left: 1.25rem;
  list-style: disc;
  color: var(--color-text);
}

.product-list li {
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text);
}

.product-feature-grid {
  flex: 1 1 20rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .product-feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.surface-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 1.5rem;
}

.surface-card-title {
  font-weight: 600;
}

.surface-card-body {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
}

.action-group {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.services-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.services-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.services-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.services-card-body {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
}

.services-note {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-disabled);
}
.company-card {
  margin-top: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .company-card {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.company-dl {
  margin: 0;
  font-size: 0.875rem;
}

.company-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.company-row:last-child {
  border-bottom: none;
}

.company-dt {
  color: var(--color-text-subtle);
}

.company-dd {
  font-weight: 600;
}

.company-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.contact-card {
  border-radius: calc(var(--radius-lg) + 0.5rem);
  border: 1px solid var(--color-border);
  background: #fff;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
  .contact-card {
    padding: 2.5rem;
  }
}

.contact-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.contact-option {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-disabled);
  user-select: none;
}

.contact-option--dashed {
  border-style: dashed;
  color: var(--color-text-subtle);
  cursor: not-allowed;
}

.contact-note {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  line-height: 1.6;
}
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links a:hover {
  color: var(--color-text-muted);
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.brand-name {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero-content {
  max-width: 32rem;
}

.hero-title-inline {
  white-space: nowrap;
}

.nav-link {
  color: var(--color-text-muted);
}

.nav-link:hover {
  color: var(--color-accent);
}
.surface-card-body .product-list {
  margin-top: 0;
}

.surface-card-body .product-list li {
  margin-bottom: 0.4rem;
}