:root {
  --navy-900: #0b1020;
  --navy-800: #111a33;
  --navy-700: #1b2547;
  --ink: #1a1f2e;
  --muted: #5b6478;
  --line: #e6e8ef;
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --gold: #c9a34e;
  --gold-soft: #e7d3a1;
  --radius: 4px;
  --maxw: 1100px;
  --shadow: 0 20px 50px -25px rgba(11, 16, 32, 0.35);
  /* 斜線テクスチャ（濃色セクション用） */
  --diagonal-dark: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0, rgba(255, 255, 255, 0.04) 1px, transparent 1px, transparent 13px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }

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

.narrow { max-width: 780px; }
.center { text-align: center; }
.pc-only { display: inline; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--navy-800), var(--navy-700));
  color: var(--gold);
  font-family: "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: 22px;
  line-height: 1;
}

.brand-name {
  font-size: 18px;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 15px;
  font-weight: 500;
}

.nav a { color: var(--muted); transition: color 0.2s; }
.nav a:hover { color: var(--ink); }

.nav-cta {
  padding: 9px 20px;
  border-radius: 3px;
  background: var(--navy-800);
  color: #fff !important;
}
.nav-cta:hover { background: var(--navy-700); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  overflow: hidden;
  background: var(--navy-900);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 56px));
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(201, 163, 78, 0.22), transparent 60%),
    radial-gradient(700px 600px at 10% 110%, rgba(27, 37, 71, 0.9), transparent 60%),
    var(--diagonal-dark),
    linear-gradient(160deg, #0b1020 0%, #131d3b 100%);
}

/* 右上の斜線アクセント（射線モチーフ） */
.hero-bg::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -60px;
  width: 380px;
  height: 380px;
  background: repeating-linear-gradient(135deg, rgba(201, 163, 78, 0.55) 0, rgba(201, 163, 78, 0.55) 2px, transparent 2px, transparent 20px);
  transform: rotate(0deg);
  -webkit-mask-image: radial-gradient(closest-side, #000 20%, transparent 78%);
  mask-image: radial-gradient(closest-side, #000 20%, transparent 78%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  padding: 120px 24px 150px;
}

.hero-eyebrow {
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold-soft);
  font-size: 15px;
  margin: 0 0 18px;
}

.hero-title {
  font-size: clamp(32px, 6vw, 60px);
  line-height: 1.35;
  font-weight: 900;
  margin: 0 0 24px;
  letter-spacing: 0.01em;
}

.hero-title .accent {
  background: linear-gradient(120deg, var(--gold-soft), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: clamp(15px, 2.2vw, 18px);
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 38px;
  max-width: 640px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 15px;
  transition: transform 0.15s, background 0.2s, border-color 0.2s, color 0.2s;
  border: 1.5px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn-lg { padding: 16px 36px; font-size: 16px; }

.btn-primary {
  background: linear-gradient(120deg, var(--gold), #b78f3c);
  color: #1a1405;
}
.btn-primary:hover { box-shadow: 0 12px 30px -12px rgba(201, 163, 78, 0.7); }

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  font-size: 14px;
  margin: 0 0 12px;
}
.section-eyebrow::before {
  content: "";
  width: 30px;
  height: 12px;
  margin-right: 12px;
  background: repeating-linear-gradient(120deg, var(--gold) 0, var(--gold) 2px, transparent 2px, transparent 6px);
}
.section-eyebrow.light { color: var(--gold-soft); }
.section-eyebrow.light::before { background: repeating-linear-gradient(120deg, var(--gold-soft) 0, var(--gold-soft) 2px, transparent 2px, transparent 6px); }
.center .section-eyebrow { justify-content: center; }

.section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  margin: 0 0 22px;
  line-height: 1.4;
}
.section-title.light { color: #fff; }

.section-text { color: var(--muted); font-size: 16px; margin: 0; }
.section-text.light { color: rgba(255, 255, 255, 0.82); }

.section-head { margin-bottom: 48px; }

/* ---------- Cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
/* 右上の斜線アクセント */
.card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 58px;
  height: 58px;
  background: linear-gradient(-45deg, transparent 42%, var(--gold-soft) 42%, var(--gold-soft) 48%, transparent 48%, transparent 54%, var(--gold-soft) 54%, var(--gold-soft) 60%, transparent 60%);
  opacity: 0.55;
  transition: opacity 0.25s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--gold-soft);
}
.card:hover::after { opacity: 1; }

.card-no {
  font-family: "Cormorant Garamond", serif;
  font-size: 30px;
  color: var(--gold);
  font-weight: 600;
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  margin: 8px 0 12px;
}

.card-text { color: var(--muted); font-size: 15px; margin: 0; }

/* ---------- Company ---------- */
.company-table {
  margin: 36px 0 0;
  border-top: 1px solid var(--line);
}
.company-table .row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}
.company-table dt { font-weight: 700; color: var(--ink); margin: 0; }
.company-table dd { margin: 0; color: var(--muted); }
.company-table a { color: var(--navy-700); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Contact ---------- */
.section-contact {
  background: var(--navy-900);
  position: relative;
  overflow: hidden;
}
.section-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(700px 400px at 50% -20%, rgba(201, 163, 78, 0.2), transparent 60%),
    var(--diagonal-dark);
}
.section-contact .container { position: relative; }
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 34px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #070b16;
  color: rgba(255, 255, 255, 0.7);
  padding: 34px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; }
.footer-logo { height: 34px; width: auto; }
.footer-copy { margin: 0; font-size: 13px; }

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .pc-only { display: none; }

  .nav {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
    transform: translateY(-140%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow);
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 14px 24px; width: 100%; }
  .nav-cta { border-radius: 0; background: transparent; color: var(--ink) !important; }

  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero-inner { padding: 84px 24px 90px; }
  .section { padding: 68px 0; }
  .cards { grid-template-columns: 1fr; }
  .company-table .row { grid-template-columns: 110px 1fr; }
  .hero-actions .btn, .contact-actions .btn { flex: 1 1 auto; }
}