:root {
  --navy: #14213d;
  --navy-soft: #24345c;
  --accent: #3d6fd9;
  --text: #1c2333;
  --muted: #5b6475;
  --line: #e3e6ec;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --radius: 14px;
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Meiryo", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: var(--accent); }

.container { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 24px; }

.sp { display: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); }
.brand-name { font-weight: 700; font-size: 1.25rem; letter-spacing: 0.06em; color: var(--navy); }
.nav { display: flex; gap: 28px; }
.nav a { color: var(--text); text-decoration: none; font-size: 0.9rem; white-space: nowrap; }
.nav a:hover { color: var(--accent); }

/* Hero */
.hero {
  padding: 120px 0 112px;
  background:
    radial-gradient(1000px 420px at 85% -10%, rgba(61, 111, 217, 0.10), transparent 60%),
    linear-gradient(180deg, #f7f9fc 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 12px;
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent);
}
.hero h1 {
  margin: 0 0 24px;
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  line-height: 1.5; font-weight: 700; color: var(--navy);
  letter-spacing: 0.04em;
  word-break: auto-phrase;
}
.lead { margin: 0 0 40px; color: var(--muted); font-size: 1.05rem; }
.button {
  display: inline-block;
  padding: 14px 32px;
  background: var(--navy); color: #fff;
  border-radius: 999px; text-decoration: none;
  font-weight: 600; font-size: 0.95rem;
  transition: background 0.2s;
}
.button:hover { background: var(--navy-soft); }

/* Sections */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 48px; }
.section-head h2 { margin: 0; font-size: 1.75rem; color: var(--navy); letter-spacing: 0.06em; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card {
  padding: 36px 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.card-icon {
  display: grid; place-items: center;
  width: 52px; height: 52px; margin-bottom: 20px;
  border-radius: 12px;
  background: rgba(61, 111, 217, 0.08); color: var(--accent);
}
.card h3 { margin: 0 0 12px; font-size: 1.1rem; color: var(--navy); line-height: 1.6; word-break: auto-phrase; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Company profile */
.profile { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.profile .row { display: grid; grid-template-columns: 200px 1fr; border-bottom: 1px solid var(--line); }
.profile .row:last-child { border-bottom: 0; }
.profile dt { padding: 22px 28px; font-weight: 600; color: var(--navy); background: #fafbfd; }
.profile dd { margin: 0; padding: 22px 28px; overflow-wrap: anywhere; }
.profile ul { margin: 0; padding-left: 1.2em; }

/* Contact */
.contact-box {
  padding: 48px 40px;
  border: 1px solid var(--line); border-radius: var(--radius);
  text-align: center;
}
.contact-box p { margin: 0 0 28px; color: var(--muted); }
.mail {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.35rem; font-weight: 600;
  color: var(--navy); text-decoration: none;
  border-bottom: 2px solid var(--accent); padding-bottom: 4px;
}
.mail:hover { color: var(--accent); }

/* Footer */
.site-footer { padding: 40px 0; background: var(--navy); color: rgba(255, 255, 255, 0.75); }
.site-footer .brand-name { color: #fff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* 404 */
.notfound { padding: 140px 0; text-align: center; }
.notfound h1 { margin: 0 0 16px; font-size: 1.6rem; color: var(--navy); }
.notfound p { margin: 0 0 32px; color: var(--muted); }

@media (max-width: 720px) {
  .sp { display: inline; }
  .pc { display: none; }
  .container { padding: 0 20px; }
  .nav { gap: 16px; }
  .nav a { font-size: 0.8rem; }
  .hero { padding: 72px 0 64px; }
  .hero h1 { font-size: 1.6rem; letter-spacing: 0.02em; }
  .lead { font-size: 0.98rem; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 1.5rem; }
  .cards { grid-template-columns: 1fr; gap: 16px; }
  .card { padding: 28px 24px; }
  .profile .row { grid-template-columns: 1fr; }
  .profile dt { padding: 14px 20px 6px; background: transparent; font-size: 0.85rem; color: var(--muted); }
  .profile dd { padding: 0 20px 16px; }
  .contact-box { padding: 36px 20px; }
  .mail { font-size: 1.1rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 374px) {
  .nav { display: none; }
  .hero h1 { font-size: 1.45rem; }
}