* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1d2430;
  background: #ffffff;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.narrow {
  max-width: 820px;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid rgba(30,40,55,.08);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-ja {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .06em;
}

.brand-en {
  margin-top: 4px;
  font-family: "Inter", sans-serif;
  font-size: 10px;
  letter-spacing: .14em;
  color: #7d8794;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  font-weight: 500;
}

.nav a {
  transition: opacity .2s ease;
}

.nav a:hover {
  opacity: .55;
}


.menu-btn {
  display: none;
  font-size: 24px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(255,255,255,.98) 0%, rgba(247,249,251,.96) 48%, rgba(235,241,245,.94) 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(100,120,140,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100,120,140,.055) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to right, transparent 0%, rgba(0,0,0,.35) 45%, rgba(0,0,0,.9) 100%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  width: 720px;
  height: 720px;
  right: -250px;
  top: 10px;
  background: radial-gradient(circle at center,
    rgba(184,205,220,.32) 0%,
    rgba(205,220,231,.18) 34%,
    rgba(235,242,247,.08) 58%,
    rgba(255,255,255,0) 72%);
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  width: 430px;
  height: 430px;
  right: 6%;
  top: 150px;
  border: 1px solid rgba(120,140,155,.16);
  transform: rotate(8deg);
  background:
    linear-gradient(145deg, rgba(255,255,255,.46), rgba(222,232,239,.18));
  box-shadow:
    0 34px 80px rgba(67,82,96,.07),
    inset 0 0 0 1px rgba(255,255,255,.45);
}

.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(120,140,155,.12);
}

.hero-bg::before {
  inset: 34px -42px -34px 42px;
}

.hero-bg::after {
  inset: -44px 46px 44px -46px;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding-top: 76px;
}

.eyebrow,
.section-kicker,
.business-tag {
  font-family: "Inter", sans-serif;
  letter-spacing: .18em;
}

.eyebrow {
  margin: 0 0 20px;
  font-size: 12px;
  color: #738190;
}

.hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.28;
  letter-spacing: .01em;
  font-weight: 600;
}

.hero-copy {
  margin: 28px 0 34px;
  font-size: 18px;
  color: #586473;
}

.primary-btn,
.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform .2s ease, opacity .2s ease;
}

.primary-btn {
  color: white;
  background: #1d2430;
}

.primary-btn:hover,
.contact-btn:hover {
  transform: translateY(-2px);
  opacity: .9;
}

.section {
  padding: 120px 0;
}

.section-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  color: #7d8794;
}

.section h2 {
  margin: 0 0 34px;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.25;
}

.lead {
  margin: 0 0 26px;
  font-size: 24px;
  line-height: 1.7;
  font-weight: 500;
}

.body-copy {
  margin: 0;
  color: #5e6977;
  font-size: 16px;
}

.business {
  background: #f5f7f9;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: flex-end;
  margin-bottom: 48px;
}

.section-head h2 {
  margin-bottom: 0;
}

.section-note {
  max-width: 420px;
  margin: 0;
  color: #697482;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

.business-card {
  position: relative;
  padding: 46px;
  background: white;
  border-radius: 18px;
  min-height: 440px;
  box-shadow: 0 16px 50px rgba(35,47,60,.06);
}

.business-number {
  position: absolute;
  right: 34px;
  top: 24px;
  font-family: "Inter", sans-serif;
  font-size: 72px;
  line-height: 1;
  font-weight: 700;
  color: #eef1f4;
}

.business-tag {
  position: relative;
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 700;
  color: #8190a0;
}

.business-card h3 {
  position: relative;
  margin: 0 0 24px;
  font-size: 25px;
}

.business-card p {
  position: relative;
  color: #626e7c;
}

.business-card ul {
  margin: 28px 0 0;
  padding-left: 1.2em;
}

.business-card li {
  margin: 6px 0;
}

.company-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 90px;
  align-items: start;
}

.company-intro {
  color: #606c79;
}

.company-table {
  margin: 0;
  border-top: 1px solid #dde2e7;
}

.company-table > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid #dde2e7;
}

.company-table dt {
  font-weight: 600;
}

.company-table dd {
  margin: 0;
  color: #5f6a77;
}

.contact {
  padding-bottom: 70px;
  background: #1d2430;
  color: white;
}

.contact-box {
  display: flex;
  justify-content: space-between;
  gap: 50px;
  align-items: center;
}

.section-kicker.light {
  color: #a9b4c1;
}

.contact h2 {
  margin-bottom: 18px;
}

.contact p {
  color: #c7ced6;
}

.contact-btn {
  flex: 0 0 auto;
  min-width: 240px;
  color: #1d2430;
  background: white;
}

.contact-note {
  width: min(1120px, calc(100% - 48px));
  margin: 36px auto 0;
  font-size: 12px;
  color: #8f9aa7 !important;
}

.footer {
  background: #171d26;
  color: white;
  padding: 30px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
}

.footer-inner > div {
  display: flex;
  flex-direction: column;
}

.footer strong {
  font-size: 14px;
}

.footer span,
.footer p {
  font-size: 11px;
  color: #8f99a5;
}

.sp-only {
  display: none;
}

@media (max-width: 800px) {
  .container {
    width: min(100% - 32px, 1120px);
  }

  .nav-wrap {
    min-height: 68px;
  }

  .menu-btn {
    display: block;
  }

  .nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    background: white;
    border-radius: 14px;
    box-shadow: 0 18px 45px rgba(20,30,40,.12);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px 12px;
  }


  .hero {
    min-height: 650px;
  }

  .hero h1 {
    font-size: clamp(36px, 11vw, 52px);
  }

  .hero-bg {
    width: 300px;
    height: 300px;
    right: -145px;
    top: 165px;
    opacity: .72;
  }

  .section {
    padding: 86px 0;
  }

  .lead {
    font-size: 20px;
  }

  .section-head,
  .contact-box,
  .footer-inner {
    display: block;
  }

  .section-note {
    margin-top: 16px;
  }

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

  .business-card {
    padding: 34px 28px;
    min-height: auto;
  }

  .business-number {
    font-size: 60px;
  }

  .company-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .company-table > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .contact-btn {
    margin-top: 26px;
    min-width: 100%;
  }

  .footer p {
    margin-top: 18px;
  }

  .sp-only {
    display: initial;
  }
}