:root {
  --bg: #08111f;
  --panel: #101b2d;
  --panel-light: #15233a;
  --text: #f4f8ff;
  --muted: #aab7cf;
  --blue: #0aa8ff;
  --blue-dark: #0959d9;
  --line: rgba(255,255,255,0.1);
  --shadow: 0 24px 70px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(10,168,255,0.22), transparent 34rem),
    linear-gradient(180deg, #07101e 0%, #0b1424 48%, #070c15 100%);
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  backdrop-filter: blur(16px);
  background: rgba(8, 17, 31, 0.78);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: 0.03em; }
.brand img { width: 46px; height: 46px; border-radius: 50%; }
.nav { display: flex; gap: 26px; color: var(--muted); font-size: 14px; }
.nav a:hover { color: var(--text); }

.hero {
  min-height: 78vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 44px;
  padding: 80px clamp(20px, 7vw, 96px) 96px;
}

.eyebrow, .section-label {
  margin: 0 0 10px;
  color: var(--blue);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 13px;
}

h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(48px, 8vw, 92px); line-height: 1.05; margin-bottom: 24px; letter-spacing: -0.05em; }
h2 { font-size: clamp(30px, 4vw, 48px); line-height: 1.25; margin-bottom: 24px; }
h3 { font-size: 21px; margin-bottom: 10px; }
.lead { max-width: 680px; color: var(--muted); font-size: clamp(17px, 2vw, 21px); margin-bottom: 34px; }
.body-text { color: var(--muted); font-size: 17px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
}
.primary { background: linear-gradient(135deg, var(--blue), var(--blue-dark)); box-shadow: 0 14px 34px rgba(10,168,255,0.3); }
.ghost { border: 1px solid var(--line); color: var(--muted); background: rgba(255,255,255,0.04); }

.hero-card {
  max-width: 390px;
  justify-self: center;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: rgba(255,255,255,0.06);
  box-shadow: var(--shadow);
  text-align: center;
}
.hero-card img { width: 100%; border-radius: 28px; background: white; }
.hero-card p { margin: 20px 0 0; color: var(--muted); font-weight: 700; }

.section { padding: 82px clamp(20px, 7vw, 96px); }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card, .flow div {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, var(--panel-light), var(--panel));
}
.card p, .flow p { color: var(--muted); margin-bottom: 0; }

.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 46px; align-items: center; }
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.check-list li {
  padding: 17px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.055);
  border: 1px solid var(--line);
}
.check-list li::before { content: "✓"; color: var(--blue); font-weight: 900; margin-right: 10px; }

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.flow span { color: var(--blue); font-weight: 900; font-size: 14px; }

.contact {
  margin: 70px clamp(20px, 7vw, 96px) 92px;
  padding: 54px 28px;
  text-align: center;
  border-radius: 34px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(10,168,255,0.18), rgba(255,255,255,0.06));
  box-shadow: var(--shadow);
}
.contact p { color: var(--muted); }
.note { font-size: 13px; margin-top: 18px; margin-bottom: 0; }
.footer { padding: 28px; text-align: center; color: var(--muted); border-top: 1px solid var(--line); }

@media (max-width: 900px) {
  .nav { display: none; }
  .hero, .split { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
  .hero-card { max-width: 320px; }
  .cards, .flow { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .site-header { padding: 14px 18px; }
  .cards, .flow { grid-template-columns: 1fr; }
  .hero { padding-bottom: 58px; }
  .section { padding-top: 58px; padding-bottom: 58px; }
  h1 { font-size: 48px; }
}