:root {
  --bg: #090b12;
  --bg-soft: #0f1420;
  --surface: #121a2a;
  --ink: #eef4ff;
  --muted: #9ab0cb;
  --line: #24324d;
  --accent: #5f9dff;
  --accent-2: #47e6c4;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1000px 500px at 10% -5%, rgba(71, 230, 196, 0.16), transparent 55%),
    radial-gradient(900px 520px at 90% 0%, rgba(95, 157, 255, 0.18), transparent 58%),
    var(--bg);
  line-height: 1.7;
}

.container {
  width: min(var(--max), 92%);
  margin: 0 auto;
}

.section {
  padding: 92px 0;
}

.dark {
  background: linear-gradient(180deg, #0c111d, #0a101b);
  border-top: 1px solid #1a253c;
  border-bottom: 1px solid #1a253c;
}

.header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
  background: rgba(8, 10, 17, 0.74);
  border-bottom: 1px solid #1b2740;
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  font-size: clamp(14px, 2.2vw, 16px);
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 18px;
}

.nav a {
  color: #b8c8de;
  text-decoration: none;
  font-size: 14px;
}

.nav a:hover {
  color: #fff;
}

.kicker,
.eyebrow,
.biz-kicker {
  margin: 0 0 8px;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
}

h1 {
  font-family: "Manrope", "Noto Sans JP", sans-serif;
  font-size: clamp(40px, 6vw, 74px);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

h2 {
  font-family: "Manrope", "Noto Sans JP", sans-serif;
  font-size: clamp(30px, 4vw, 52px);
  margin-bottom: 18px;
  letter-spacing: -0.015em;
}

h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.hero {
  padding-top: 110px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.hero-copy,
.hero-sub,
.about-copy p,
.biz-card p,
.strength-card p,
.mvv-card p,
.contact p,
.footer p,
.footer li {
  color: var(--muted);
  margin-top: 0;
}

.hero-copy {
  font-size: clamp(17px, 2vw, 21px);
  margin-bottom: 10px;
}

.hero-sub {
  margin-bottom: 24px;
}

.hero-panel {
  background: linear-gradient(180deg, rgba(19, 31, 52, 0.9), rgba(13, 21, 37, 0.86));
  border: 1px solid #2c3b5b;
  border-radius: 18px;
  padding: 20px;
}

.panel-title {
  margin: 0 0 12px;
  color: #fff;
  font-weight: 700;
}

.hero-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 9px;
}

.hero-panel li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  border-bottom: 1px solid rgba(154, 176, 203, 0.2);
  padding-bottom: 8px;
}

.hero-panel span {
  color: #9bb3cf;
  font-size: 13px;
}

.hero-panel strong {
  color: #f2f7ff;
  font-size: 14px;
  text-align: right;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}

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

.btn-mini {
  padding: 8px 12px;
  background: #152644;
  color: #f0f5ff;
  font-size: 13px;
}

.btn-primary {
  padding: 12px 16px;
  color: #05101f;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.btn-outline {
  padding: 12px 16px;
  color: #dbe9ff;
  border-color: #4b658f;
  background: rgba(16, 25, 41, 0.6);
}

.btn-ghost {
  padding: 12px 16px;
  color: #b9cff0;
  border-color: #2a3956;
  background: transparent;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
}

.about-copy {
  max-width: 760px;
}

.mvv-grid,
.business-grid,
.strength-grid {
  display: grid;
  gap: 14px;
}

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

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

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

.mvv-card,
.biz-card,
.strength-card,
.contact-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}

.mvv-card ul,
.biz-card ul,
.footer ul {
  margin: 0;
  padding-left: 18px;
}

.biz-card a {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent-2);
  font-weight: 700;
  text-decoration: none;
}

.structure-wrap {
  padding: 24px;
  background: linear-gradient(180deg, #111a2a, #0d1523);
  border: 1px solid #263657;
  border-radius: 16px;
}

.node {
  text-align: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #344c77;
  background: #16233a;
  color: #ebf3ff;
  font-weight: 700;
}

.node.root {
  width: min(420px, 100%);
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(95, 157, 255, 0.25), rgba(71, 230, 196, 0.22));
}

.line {
  width: 2px;
  height: 36px;
  background: #3a5789;
  margin: 10px auto;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.contact {
  background: linear-gradient(180deg, rgba(15, 24, 39, 0.9), rgba(10, 15, 25, 0.95));
}

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

.footer {
  padding: 36px 0 28px;
  border-top: 1px solid #1f2d46;
  background: #070a11;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
}

.foot-logo {
  color: #fff;
  font-weight: 800;
  margin-bottom: 8px;
}

.foot-title {
  color: #fff;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer a {
  color: #c8d9f3;
  text-decoration: none;
}

.copy {
  text-align: center;
  margin: 20px 0 0;
  color: #93a8c8;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-grid,
  .split {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 760px) {
  .section {
    padding: 70px 0;
  }

  .header {
    position: static;
  }

  .nav {
    display: none;
  }

  .business-grid,
  .strength-grid,
  .mvv-grid,
  .footer-grid,
  .node-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(34px, 11vw, 48px);
  }

  h2 {
    font-size: clamp(27px, 8vw, 38px);
  }
}