:root {
  --navy: #0d1b2a;
  --navy2: #16283f;
  --gold: #c9a961;
  --ink: #1f2937;
  --muted: #6b7280;
  --bg: #f8f9fb;
  --line: #e5e7eb;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* header */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-size: 18px; font-weight: 700; letter-spacing: .12em; color: var(--navy); }
.brand span { color: var(--gold); }
nav { display: flex; gap: 28px; font-size: 14px; }
nav a { color: var(--muted); transition: color .2s; }
nav a:hover { color: var(--navy); }

/* hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy2) 70%);
  color: #fff; padding: 110px 0 100px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(201,169,97,.22), transparent 65%);
}
.hero h1 { font-size: clamp(28px, 4.6vw, 44px); font-weight: 700; letter-spacing: .04em; line-height: 1.5; }
.hero p.lead { margin-top: 22px; font-size: 16px; color: #cdd6e0; max-width: 560px; }
.hero .en { display: block; margin-top: 34px; font-size: 12px; letter-spacing: .3em; color: var(--gold); }

/* sections */
section { padding: 88px 0; }
section.alt { background: var(--bg); }
.sec-label { font-size: 12px; letter-spacing: .28em; color: var(--gold); font-weight: 700; }
h2 { font-size: 28px; color: var(--navy); margin: 10px 0 40px; letter-spacing: .06em; }

/* services */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cards.four { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 34px 28px; transition: box-shadow .25s, transform .25s;
}
.card:hover { box-shadow: 0 10px 30px rgba(13,27,42,.08); transform: translateY(-3px); }
.card .num { font-size: 12px; letter-spacing: .2em; color: var(--gold); font-weight: 700; }
.card h3 { font-size: 18px; color: var(--navy); margin: 10px 0 12px; line-height: 1.5; }
.card p { font-size: 14px; color: var(--muted); }

/* company table */
table.company { width: 100%; border-collapse: collapse; background: #fff; }
table.company th, table.company td { text-align: left; padding: 18px 20px; border-bottom: 1px solid var(--line); font-size: 15px; vertical-align: top; }
table.company th { width: 180px; color: var(--navy); font-weight: 700; white-space: nowrap; }
table.company td ul { list-style: none; }
table.company td li { padding-left: 1em; text-indent: -1em; }
table.company td li::before { content: "・"; }

/* contact */
.contact-box { background: var(--navy); color: #fff; border-radius: 12px; padding: 56px 40px; text-align: center; }
.contact-box p { color: #cdd6e0; font-size: 15px; }
.btn {
  display: inline-block; margin-top: 26px; padding: 14px 48px;
  background: var(--gold); color: var(--navy); font-weight: 700; font-size: 15px;
  border-radius: 999px; letter-spacing: .08em; transition: opacity .2s;
  white-space: nowrap;
}
.btn:hover { opacity: .85; }

/* legal pages */
.legal h1 { font-size: 26px; color: var(--navy); margin: 64px 0 36px; }
.legal h2 { font-size: 19px; margin: 40px 0 14px; }
.legal p, .legal li { font-size: 15px; color: var(--ink); }
.legal ol, .legal ul { padding-left: 1.4em; }
.legal .updated { color: var(--muted); font-size: 13px; margin-top: 40px; }

/* footer */
footer { background: var(--navy); color: #9fb0c3; padding: 44px 0; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a:hover { color: #fff; }

@media (max-width: 768px) {
  nav { display: none; }
  .cards, .cards.four { grid-template-columns: 1fr; }
  table.company th { width: 110px; }
  .hero { padding: 80px 0 70px; }
  .btn { padding: 14px 32px; }
  .contact-box { padding: 48px 24px; }
}