:root {
  --color-background: #ffffff;
  --color-text: #111111;
  --color-muted: #666666;
  --color-line: #e5e5e5;
  --color-accent: #1f3a5f;
  --content-width: 1100px;
  --page-padding: clamp(20px, 5vw, 64px);
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--color-text);
  background: var(--color-background);
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 5px;
}

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid rgba(229, 229, 229, 0.75);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner,
.hero-inner,
.section,
.site-footer {
  width: min(100%, calc(var(--content-width) + (var(--page-padding) * 2)));
  margin-inline: auto;
  padding-inline: var(--page-padding);
}

.header-inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-name,
.nav-list,
.hero-role,
h1,
h2,
.section-number,
.card-number,
.contact-label,
.site-footer {
  font-family: "Inter", sans-serif;
}

.site-name {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-list {
  display: flex;
  margin: 0;
  padding: 0;
  gap: clamp(18px, 3vw, 36px);
  list-style: none;
  color: var(--color-muted);
  font-size: 0.76rem;
  font-weight: 500;
}

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

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

.hero {
  min-height: 100svh;
  border-bottom: 1px solid var(--color-line);
}

.hero-inner {
  position: relative;
  display: flex;
  min-height: 100svh;
  align-items: center;
}

.hero-copy {
  width: 100%;
  padding-block: calc(var(--header-height) + 64px) 96px;
}

.hero-role {
  margin: 0 0 18px;
  color: var(--color-accent);
  font-size: clamp(0.72rem, 1vw, 0.88rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3.5rem, 14.2vw, 10rem);
  font-weight: 700;
  letter-spacing: -0.075em;
  line-height: 0.88;
}

.hero-name {
  display: flex;
  margin: clamp(28px, 5vw, 56px) 0 0;
  align-items: center;
  gap: 16px;
  font-size: clamp(0.82rem, 1.2vw, 0.98rem);
  font-weight: 500;
}

.hero-name-en {
  padding-left: 16px;
  border-left: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: "Inter", sans-serif;
}

.scroll-cue {
  position: absolute;
  right: var(--page-padding);
  bottom: 26px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-muted);
  font-family: "Inter", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.scroll-cue span:last-child {
  color: var(--color-accent);
  transition: transform 180ms ease;
}

.scroll-cue:hover span:last-child {
  transform: translateY(4px);
}

.section {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(0, 2.2fr);
  gap: clamp(48px, 8vw, 112px);
  padding-block: clamp(96px, 13vw, 168px);
  border-bottom: 1px solid var(--color-line);
}

.section-heading {
  align-self: start;
}

.section-number {
  margin: 0 0 14px;
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

h2 {
  margin: 0;
  font-size: clamp(2.35rem, 5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1;
}

.section-content {
  min-width: 0;
}

.about-content p {
  max-width: 740px;
  margin: 0;
  font-size: clamp(1.05rem, 1.75vw, 1.35rem);
  line-height: 2.05;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.service-card {
  min-height: 240px;
  padding: clamp(24px, 3vw, 34px);
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  transition: background-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}

.service-card:hover {
  z-index: 1;
  background: #f8fafc;
  box-shadow: 0 12px 30px rgba(17, 17, 17, 0.06);
  transform: translateY(-4px);
}

.card-number {
  margin: 0 0 48px;
  color: var(--color-accent);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.service-card h3 {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.service-card > p:last-child {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.83rem;
  line-height: 1.8;
}

.contact-lead {
  margin: 0 0 clamp(42px, 6vw, 72px);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.contact-list {
  border-top: 1px solid var(--color-line);
  font-style: normal;
}

.contact-list a {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) auto;
  padding-block: 24px;
  align-items: center;
  border-bottom: 1px solid var(--color-line);
  gap: 20px;
  transition: color 180ms ease;
}

.contact-label {
  color: var(--color-muted);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-value {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: "Inter", "Noto Sans JP", sans-serif;
  font-size: clamp(1.15rem, 2.7vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.025em;
}

.contact-arrow {
  color: var(--color-accent);
  font-size: 1.35rem;
  transition: transform 180ms ease;
}

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

.contact-list a:hover .contact-arrow {
  transform: translate(4px, -4px);
}

.site-footer {
  padding-block: 30px;
  color: var(--color-muted);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.site-footer p {
  margin: 0;
}

.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .section {
    grid-template-columns: 1fr;
    gap: 56px;
  }

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

@media (max-width: 560px) {
  :root {
    --header-height: 58px;
  }

  .header-inner {
    gap: 14px;
  }

  .nav-list {
    gap: 15px;
    font-size: 0.68rem;
  }

  .hero-copy {
    padding-bottom: 112px;
  }

  .hero-role {
    margin-bottom: 15px;
    letter-spacing: 0.09em;
  }

  h1 {
    font-size: clamp(3.5rem, 20vw, 5rem);
  }

  .hero-name {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .hero-name-en {
    padding-left: 0;
    border-left: 0;
  }

  .section {
    gap: 44px;
    padding-block: 88px;
  }

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

  .service-card {
    min-height: 210px;
  }

  .card-number {
    margin-bottom: 36px;
  }

  .contact-list a {
    grid-template-columns: 1fr auto;
    gap: 5px 12px;
  }

  .contact-label {
    grid-column: 1 / -1;
  }

  .contact-arrow {
    grid-column: 2;
    grid-row: 2;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}