:root {
  --accent: #1eb9ee;
  --accent-dark: #0f9fd1;
  --ink: #111418;
  --ink-soft: #4a5158;
  --line: #e6e9ed;
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --max: 1080px;
  --font-jp: "Noto Sans JP", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --font-en: "Inter", var(--font-jp);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-jp);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand-logo { height: 26px; width: auto; }
.nav {
  display: flex;
  gap: 32px;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.nav a {
  color: var(--ink-soft);
  position: relative;
  transition: color 0.2s;
}
.nav a:hover { color: var(--accent); }

.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  padding-top: 40px;
  padding-bottom: 40px;
}
.hero-logo {
  width: min(320px, 62vw);
  height: auto;
}
.hero-copy {
  font-size: clamp(1.4rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--ink);
}
.hero-copy .ph { display: inline-block; }
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(circle at 78% 18%, rgba(30, 185, 238, 0.16), transparent 42%),
    radial-gradient(circle at 14% 88%, rgba(30, 185, 238, 0.10), transparent 46%);
}

.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }
.section-label {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 48px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 36px 28px 32px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(17, 20, 24, 0.08);
  border-color: transparent;
}
.card-no {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.card-title {
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 14px;
}
.card-sub {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 4px;
  letter-spacing: 0.04em;
}
.card-text {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-top: 18px;
  line-height: 1.9;
}

.company-table {
  border-top: 1px solid var(--line);
  max-width: 760px;
}
.company-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}
.company-row dt {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.company-row dd { color: var(--ink-soft); }

.contact-inner { text-align: center; }
.contact-inner .section-title { margin-bottom: 24px; }
.contact-text { color: var(--ink-soft); margin-bottom: 32px; }
.btn {
  display: inline-block;
  font-family: var(--font-en);
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--accent);
  color: #fff;
  padding: 16px 44px;
  border-radius: 999px;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 10px 24px rgba(30, 185, 238, 0.3);
}
.btn:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}
.contact-note {
  margin-top: 20px;
  font-size: 0.8rem;
  color: #9aa1a8;
}

.site-footer {
  background: var(--ink);
  color: #c7ccd2;
  padding: 56px 0 40px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.footer-brand {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  color: #fff;
}
.footer-nav a {
  color: #9aa1a8;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--accent); }
.copyright {
  font-family: var(--font-en);
  font-size: 0.78rem;
  color: #7b828a;
  letter-spacing: 0.04em;
}

.page-head {
  padding: 80px 0 40px;
  border-bottom: 1px solid var(--line);
}
.page-head .section-title { margin-bottom: 0; }
.legal { padding: 56px 0 100px; }
.legal h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 40px 0 12px;
  letter-spacing: 0.03em;
}
.legal h2:first-child { margin-top: 0; }
.legal p, .legal li { color: var(--ink-soft); font-size: 0.95rem; }
.legal ul, .legal ol { margin: 10px 0 10px 1.5em; }
.legal li { margin-bottom: 8px; padding-left: 4px; }
.legal li strong { color: var(--ink); font-weight: 700; }
.legal a { color: var(--accent); }
.legal .updated { margin-top: 48px; font-size: 0.85rem; color: #9aa1a8; }
.back-link {
  display: inline-block;
  margin-top: 40px;
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--accent);
}

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav { gap: 16px; font-size: 0.8rem; }
  .brand-logo { height: 20px; }
  .section { padding: 72px 0; }
  .hero { min-height: 70vh; }
  .company-row { grid-template-columns: 92px 1fr; gap: 10px; }
}
@media (max-width: 420px) {
  .header-inner { height: 60px; }
  .nav { gap: 12px; font-size: 0.72rem; }
  .brand-logo { height: 18px; }
}