:root {
  --sky-50: #f4fbfe;
  --sky-100: #e4f6fc;
  --sky-200: #c4ecf8;
  --sky-300: #8ed9f0;
  --sky-400: #4ec8e8;
  --sky-500: #0ea5d8;
  --sky-600: #0b86b3;
  --ink: #123040;
  --ink-soft: #4a6572;
  --paper: #ffffff;
  --line: rgba(14, 165, 216, 0.16);
  --shadow: 0 24px 60px rgba(14, 133, 176, 0.12);
  --radius: 28px;
  --header-h: 76px;
  --font-sans: "Zen Kaku Gothic New", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  --font-en: "Outfit", sans-serif;
  --font-serif: "Shippori Mincho", "Hiragino Mincho ProN", serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(78, 200, 232, 0.22), transparent 55%),
    linear-gradient(180deg, #f7fcfe 0%, #eef8fc 100%);
  font-family: var(--font-sans);
  line-height: 1.8;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

:focus-visible {
  outline: 2px solid var(--sky-500);
  outline-offset: 3px;
}

button {
  font: inherit;
}

.sr-only,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  top: 12px;
  left: 12px;
  z-index: 80;
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  padding: 10px 14px;
  background: var(--paper);
  border-radius: 999px;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(247, 252, 254, 0.78);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--sky-500);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-family: var(--font-en);
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.brand-text small {
  font-size: 11px;
  color: var(--ink-soft);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 14px;
  color: var(--ink-soft);
}

.nav a:hover,
.mobile-nav a:hover {
  color: var(--sky-600);
}

.nav-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta,
.btn-primary {
  background: var(--sky-500);
  color: #fff !important;
  box-shadow: 0 10px 24px rgba(14, 165, 216, 0.28);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(14, 165, 216, 0.24);
  color: var(--ink);
}

.btn:hover,
.nav-cta:hover {
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 13px;
}

.menu-toggle-bars span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 3px 0;
  background: var(--ink);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px 20px 20px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  padding: 10px 0;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 72px 0 0;
}

.hero-glow,
.hero-orb {
  position: absolute;
  pointer-events: none;
}

.hero-glow {
  inset: 0;
  background:
    radial-gradient(circle at 78% 18%, rgba(78, 200, 232, 0.38), transparent 28%),
    radial-gradient(circle at 18% 72%, rgba(14, 165, 216, 0.16), transparent 26%);
}

.hero-orb {
  border-radius: 50%;
  filter: blur(2px);
}

.hero-orb-a {
  width: 280px;
  height: 280px;
  right: 8%;
  top: 12%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(78, 200, 232, 0.35));
  animation: float 9s ease-in-out infinite;
}

.hero-orb-b {
  width: 160px;
  height: 160px;
  left: 12%;
  bottom: 18%;
  background: linear-gradient(180deg, rgba(14, 165, 216, 0.18), rgba(255, 255, 255, 0.5));
  animation: float 7s ease-in-out infinite reverse;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding-bottom: 72px;
}

.eyebrow,
.section-index {
  margin: 0 0 16px;
  font-family: var(--font-en);
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--sky-600);
}

.hero-title {
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-size: clamp(44px, 8vw, 92px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.04em;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(90deg, #0b86b3, #4ec8e8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead,
.section-copy,
.business-body p,
.value-card p,
.contact-panel p {
  color: var(--ink-soft);
}

.hero-lead {
  max-width: 36em;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.marquee {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
}

.marquee-track {
  display: flex;
  gap: 48px;
  width: max-content;
  padding: 16px 0;
  animation: marquee 32s linear infinite;
}

.marquee-track span {
  font-family: var(--font-serif);
  letter-spacing: 0.12em;
  color: var(--sky-600);
}

.section {
  padding: 112px 0;
}

.section-heading h2,
.contact-panel h2,
.business-body h3,
.value-card h3 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: 0.06em;
}

.section-copy {
  margin: 0;
  max-width: 36em;
}

.philosophy {
  margin: 48px 0 56px;
  padding: 48px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(228, 246, 252, 0.8));
  box-shadow: var(--shadow);
  text-align: center;
}

.philosophy p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 5vw, 52px);
  letter-spacing: 0.08em;
}

.value-grid,
.business-list {
  display: grid;
  gap: 20px;
}

.value-grid {
  grid-template-columns: repeat(3, 1fr);
}

.value-card,
.business-card,
.spec,
.contact-panel {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.value-card {
  padding: 28px;
}

.value-num {
  display: inline-block;
  margin-bottom: 16px;
  font-family: var(--font-en);
  color: var(--sky-500);
}

.value-card h3,
.business-body h3 {
  font-size: 26px;
}

.business-list {
  margin-top: 48px;
}

.business-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  overflow: hidden;
}

.business-visual {
  min-height: 220px;
}

.business-body {
  padding: 36px;
}

.pill {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--sky-100);
  color: var(--sky-600);
  font-size: 12px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 20px 0 24px;
  list-style: none;
}

.chip-list li {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--sky-50);
  border: 1px solid var(--line);
  font-size: 13px;
}

.text-link {
  color: var(--sky-600);
  font-weight: 700;
}

.company-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.company-intro {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.president-photo {
  margin: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.president-photo img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: 18% 20%;
}

.president-photo figcaption {
  padding: 14px 18px 16px;
  color: var(--ink-soft);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.spec {
  margin: 0;
  padding: 12px 28px;
}

.spec div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

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

.spec dt {
  color: var(--ink-soft);
}

.spec a {
  color: var(--sky-600);
}

.contact-panel {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: center;
  padding: 48px;
  background:
    linear-gradient(135deg, rgba(14, 165, 216, 0.12), rgba(255, 255, 255, 0.88) 42%);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-footer {
  padding: 48px 0 28px;
  border-top: 1px solid var(--line);
  background: #0f3a4b;
  color: #d7eef6;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand {
  margin: 0 0 8px;
  font-family: var(--font-en);
  font-size: 20px;
  color: #fff;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-footer a:hover {
  color: #fff;
}

.copyright {
  width: min(1120px, calc(100% - 40px));
  margin: 32px auto 0;
  color: #8fb4c2;
  font-size: 13px;
}

.fade-up {
  animation: rise 0.9s ease both;
}

.fade-up:nth-child(2) { animation-delay: 0.08s; }
.fade-up:nth-child(3) { animation-delay: 0.16s; }
.fade-up:nth-child(4) { animation-delay: 0.24s; }

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (max-width: 900px) {
  .container {
    width: min(1120px, calc(100% - 32px));
  }

  .nav {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mobile-nav.is-open {
    display: flex;
  }

  .value-grid,
  .business-card,
  .company-grid,
  .contact-panel,
  .footer-inner {
    grid-template-columns: 1fr;
    display: grid;
  }

  .contact-panel,
  .footer-inner {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .hide-sp {
    display: none;
  }

  .section,
  .hero {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .contact-panel,
  .business-body,
  .philosophy {
    padding: 28px;
  }
}

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

  .fade-up,
  .reveal,
  .hero-orb,
  .marquee-track {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}