/* ====== Reset & Base ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-ink: #0f1419;
  --color-ink-soft: #2a3038;
  --color-accent: #1a3a5c;       /* 深い藍 */
  --color-accent-soft: #2d5582;
  --color-paper: #f7f5f0;        /* 生成り */
  --color-paper-warm: #efeae0;
  --color-line: #d8d3c7;
  --color-mute: #6b6660;
  --font-display: 'Shippori Mincho', 'Yu Mincho', serif;
  --font-en: 'Cormorant Garamond', serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --max-w: 1200px;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.02em;
}

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

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }

/* ====== Header ====== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; flex-direction: column; line-height: 1; }
.logo-mark {
  font-family: var(--font-en);
  font-size: 26px; font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--color-ink-soft);
}
.logo-sub {
  font-family: var(--font-display);
  font-size: 10px; letter-spacing: 0.4em;
  color: var(--color-mute); margin-top: 4px;
}

.nav { display: flex; gap: 36px; }
.nav a {
  font-size: 14px; letter-spacing: 0.15em;
  position: relative; padding: 4px 0;
  transition: color 0.3s ease;
}
.nav a::after {
  content: ''; position: absolute;
  bottom: -2px; left: 0; width: 0; height: 1px;
  background: var(--color-accent);
  transition: width 0.4s ease;
}
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a.active { color: var(--color-accent); }

.nav-toggle {
  display: none; background: none; border: none;
  width: 28px; height: 22px; cursor: pointer;
  flex-direction: column; justify-content: space-between; padding: 0;
}
.nav-toggle span { display: block; height: 1.5px; background: var(--color-ink); transition: 0.3s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

/* ====== Hero ====== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 32px 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(26, 58, 92, 0.06), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(26, 58, 92, 0.04), transparent 50%),
    linear-gradient(180deg, var(--color-paper) 0%, var(--color-paper-warm) 100%);
  z-index: -2;
}
.hero-grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.08; z-index: -1; pointer-events: none;
}
.hero-content {
  max-width: var(--max-w); margin: 0 auto;
  width: 100%; position: relative; z-index: 2;
}
.eyebrow {
  font-family: var(--font-en);
  font-size: 14px; letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 32px;
  opacity: 0; animation: fadeUp 0.8s ease forwards 0.2s;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.05em;
  margin-bottom: 40px;
  color: var(--color-ink);
}
.hero-title .line {
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s ease forwards;
}
.hero-title .line:nth-child(1) { animation-delay: 0.4s; }
.hero-title .line:nth-child(2) { animation-delay: 0.7s; }
.hero-lead {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 2;
  color: var(--color-ink-soft);
  margin-bottom: 48px;
  opacity: 0; animation: fadeUp 1s ease forwards 1s;
}
.hero-actions {
  display: flex; gap: 16px; flex-wrap: wrap;
  opacity: 0; animation: fadeUp 1s ease forwards 1.2s;
}
.hero-mark {
  position: absolute; right: -40px; bottom: 60px;
  font-family: var(--font-en);
  text-align: right; line-height: 1;
  opacity: 0.06; pointer-events: none;
}
.hero-mark span { display: block; font-size: 18px; letter-spacing: 0.3em; color: var(--color-ink-soft); }
.hero-mark .big { font-size: clamp(120px, 18vw, 240px); font-weight: 400; letter-spacing: 0.1em; margin-top: 8px; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 16px 36px;
  font-family: var(--font-body);
  font-size: 14px; letter-spacing: 0.15em;
  border: 1px solid transparent;
  cursor: pointer; transition: all 0.3s ease;
}
.btn-primary { background: var(--color-accent); color: var(--color-paper); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-ink); border-color: var(--color-ink); }
.btn-ghost { background: transparent; color: var(--color-ink); border-color: var(--color-ink-soft); }
.btn-ghost:hover { background: var(--color-ink); color: var(--color-paper); }
.btn-block { width: 100%; padding: 18px; }

/* ====== Sections ====== */
.section-num {
  font-family: var(--font-en);
  font-size: 14px; letter-spacing: 0.25em;
  color: var(--color-accent); margin-bottom: 8px;
}
.section-tag {
  font-family: var(--font-en);
  font-size: 11px; letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-mute); margin-bottom: 24px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 500; line-height: 1.5;
  letter-spacing: 0.05em;
  margin-bottom: 32px;
}

/* Intro */
.intro { padding: 120px 0; }
.intro-grid {
  display: grid; grid-template-columns: 200px 1fr;
  gap: 80px; align-items: start;
}
.intro-text {
  font-family: var(--font-display);
  font-size: 16px; line-height: 2.2;
  color: var(--color-ink-soft);
  margin-bottom: 32px;
}
.link-arrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 14px; letter-spacing: 0.15em;
  color: var(--color-accent);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--color-accent);
  transition: gap 0.3s ease;
}
.link-arrow:hover { gap: 20px; }
.link-arrow span { font-family: var(--font-en); }

/* Values */
.values { padding: 120px 0; background: var(--color-paper-warm); position: relative; }
.values::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-line), transparent);
}
.values-head { text-align: center; margin-bottom: 80px; }
.values-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px;
}
.value-card {
  background: var(--color-paper);
  padding: 56px 36px;
  border: 1px solid var(--color-line);
  position: relative;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.value-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -20px rgba(26, 58, 92, 0.2);
}
.value-num {
  font-family: var(--font-en);
  font-size: 32px; font-weight: 300;
  font-style: italic;
  color: var(--color-accent);
  margin-bottom: 24px;
}
.value-card h3 {
  font-family: var(--font-display);
  font-size: 26px; font-weight: 500;
  margin-bottom: 20px; letter-spacing: 0.1em;
}
.value-card p {
  font-size: 14px; line-height: 2;
  color: var(--color-ink-soft);
}

/* CTA */
.cta { padding: 100px 0; background: var(--color-ink); color: var(--color-paper); }
.cta-inner { text-align: center; }
.cta h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 500; margin-bottom: 16px;
  letter-spacing: 0.08em;
}
.cta p { margin-bottom: 36px; color: rgba(247, 245, 240, 0.7); }
.cta .btn-primary { background: var(--color-paper); color: var(--color-ink); border-color: var(--color-paper); }
.cta .btn-primary:hover { background: var(--color-accent); color: var(--color-paper); border-color: var(--color-accent); }

/* ====== Page Hero (内ページ用) ====== */
.page-hero {
  padding: 200px 0 100px;
  background: var(--color-paper-warm);
  border-bottom: 1px solid var(--color-line);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute;
  right: -100px; top: 50%; transform: translateY(-50%);
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 58, 92, 0.05), transparent 70%);
}
.page-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 500; letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.page-lead {
  font-family: var(--font-display);
  font-size: 16px; color: var(--color-ink-soft);
}

/* ====== Business ====== */
.business-list { padding: 100px 0; }
.biz-item {
  display: grid; grid-template-columns: 120px 1fr;
  gap: 48px; padding: 60px 0;
  border-bottom: 1px solid var(--color-line);
}
.biz-item:last-child { border-bottom: none; }
.biz-num {
  font-family: var(--font-en);
  font-size: 56px; font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
}
.biz-cat {
  font-family: var(--font-en);
  font-size: 13px; letter-spacing: 0.25em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.biz-body h2 {
  font-family: var(--font-display);
  font-size: 30px; font-weight: 500;
  margin-bottom: 24px; letter-spacing: 0.06em;
}
.biz-desc {
  font-family: var(--font-display);
  font-size: 15px; line-height: 2;
  color: var(--color-ink-soft);
  margin-bottom: 28px;
}
.biz-points {
  list-style: none;
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}
.biz-points li {
  padding: 12px 0 12px 28px;
  position: relative;
  font-size: 14px;
}
.biz-points li::before {
  content: ''; position: absolute;
  left: 0; top: 22px;
  width: 16px; height: 1px;
  background: var(--color-accent);
}

/* ====== Company ====== */
.company-info { padding: 100px 0 80px; }
.info-table { max-width: 800px; margin: 0 auto; }
.info-row {
  display: grid; grid-template-columns: 200px 1fr;
  gap: 32px; padding: 28px 0;
  border-bottom: 1px solid var(--color-line);
}
.info-row:first-child { border-top: 1px solid var(--color-line); }
.info-row dt {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}
.info-row dd {
  font-size: 15px; line-height: 1.9;
  color: var(--color-ink-soft);
}

.access { padding: 60px 0 120px; }
.access-head { text-align: center; margin-bottom: 50px; }
.map-wrap {
  border: 1px solid var(--color-line);
  filter: grayscale(0.3);
}
.map-wrap iframe { display: block; }

/* ====== Contact ====== */
.contact-section { padding: 100px 0; }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 80px;
}
.contact-info h2, .contact-form-wrap h2 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 500;
  letter-spacing: 0.1em;
  padding-bottom: 20px; margin-bottom: 32px;
  border-bottom: 2px solid var(--color-accent);
}
.phone-large {
  font-family: var(--font-en);
  font-size: 42px; font-weight: 400;
  color: var(--color-accent);
  letter-spacing: 0.05em; margin-bottom: 8px;
}
.phone-note { font-size: 13px; color: var(--color-mute); margin-bottom: 40px; }
.fax-block { font-size: 14px; line-height: 2; }
.fax-block p { padding: 14px 0; border-top: 1px solid var(--color-line); }
.fax-block .label {
  display: inline-block; width: 80px;
  font-family: var(--font-display);
  font-weight: 500; color: var(--color-accent);
  letter-spacing: 0.1em;
}

.contact-form { display: flex; flex-direction: column; gap: 24px; }
.form-row label {
  display: block;
  font-size: 13px; letter-spacing: 0.1em;
  margin-bottom: 10px;
  font-family: var(--font-display); font-weight: 500;
}
.req {
  display: inline-block;
  background: var(--color-accent); color: var(--color-paper);
  font-size: 10px; padding: 2px 8px;
  margin-left: 8px; letter-spacing: 0.1em;
  font-weight: 400;
}
.form-row input, .form-row textarea {
  width: 100%; padding: 14px 16px;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  font-family: var(--font-body); font-size: 14px;
  color: var(--color-ink);
  transition: border-color 0.3s ease;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none; border-color: var(--color-accent);
}
.form-row textarea { resize: vertical; min-height: 140px; }
.form-actions { margin-top: 8px; }
.form-note {
  font-size: 12px; color: var(--color-mute);
  margin-top: 16px; text-align: center;
}

/* Business Preview (top) */
.biz-preview { padding: 120px 0; background: var(--color-paper-warm); position: relative; }
.biz-preview::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-line), transparent);
}
.preview-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-bottom: 60px;
}
.preview-card {
  background: var(--color-paper);
  padding: 40px 32px;
  border: 1px solid var(--color-line);
  display: flex; flex-direction: column;
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  position: relative;
}
.preview-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 16px 32px -20px rgba(26, 58, 92, 0.25);
}
.preview-num {
  font-family: var(--font-en);
  font-size: 14px; letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 20px;
}
.preview-en {
  font-family: var(--font-en);
  font-size: 12px; letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-mute);
  margin-bottom: 10px;
}
.preview-card h3 {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 500;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  line-height: 1.5;
}
.preview-desc {
  font-size: 13px; line-height: 1.9;
  color: var(--color-ink-soft);
  margin-top: auto;
}
.preview-more { text-align: center; }

/* Footer */
.site-footer {
  background: var(--color-ink); color: var(--color-paper);
  padding: 80px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 1fr auto;
  gap: 60px; padding-bottom: 60px;
  border-bottom: 1px solid rgba(247, 245, 240, 0.15);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 500;
  letter-spacing: 0.15em; margin-bottom: 20px;
}
.footer-address {
  font-size: 13px; line-height: 2;
  color: rgba(247, 245, 240, 0.6);
}
.footer-nav { display: flex; flex-direction: column; gap: 14px; }
.footer-nav a {
  font-size: 13px; letter-spacing: 0.1em;
  color: rgba(247, 245, 240, 0.8);
  transition: color 0.3s ease;
}
.footer-nav a:hover { color: var(--color-paper); }
.copyright {
  margin-top: 32px; text-align: center;
  font-family: var(--font-en);
  font-size: 12px; letter-spacing: 0.2em;
  color: rgba(247, 245, 240, 0.4);
}

/* Tablet中間幅 */
@media (max-width: 1100px) and (min-width: 901px) {
  .preview-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ====== Responsive ====== */
@media (max-width: 900px) {
  .nav { display: none; position: fixed; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--color-paper); padding: 20px 32px 40px; border-bottom: 1px solid var(--color-line); }
  .nav.is-open { display: flex; }
  .nav a { padding: 18px 0; border-bottom: 1px solid var(--color-line); }
  .nav-toggle { display: flex; }

  .intro-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .values-grid, .preview-grid { grid-template-columns: 1fr; gap: 24px; }
  .biz-item { grid-template-columns: 1fr; gap: 16px; }
  .biz-num { font-size: 40px; }
  .info-row { grid-template-columns: 1fr; gap: 8px; padding: 20px 0; }

  .container { padding: 0 24px; }
  .header-inner { padding: 14px 24px; }
  .hero { padding: 100px 24px 60px; min-height: 90vh; }
  .intro, .values, .business-list, .company-info, .contact-section { padding: 80px 0; }
  .page-hero { padding: 140px 0 70px; }
}