:root {
  --color-bg: #fafaf7;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-primary: #0f3d5c;
  --color-primary-dark: #082a42;
  --color-accent: #e8a03c;
  --color-line: #e5e3dd;
  --color-soft: #f3f1ec;
  --color-dark: #0f1a26;
  --font-jp: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-en: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --container: 1180px;
  --radius: 4px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-jp);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0 0 1rem; line-height: 1.4; font-weight: 700; }
p { margin: 0 0 1rem; }

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

.section-eyebrow {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.section-eyebrow.center { text-align: center; }
.section-eyebrow.light { color: var(--color-accent); }

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}
.section-title.center { text-align: center; }
.section-title.light { color: #fff; }

.section-desc {
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 3rem;
}
.section-desc.center { text-align: center; }

.lead {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.9rem 2rem;
  font-family: var(--font-jp);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.25s;
  border: 1.5px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15, 61, 92, 0.25);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}
.btn-large {
  padding: 1.1rem 3rem;
  font-size: 1rem;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.logo { display: flex; align-items: baseline; gap: 0.6rem; }
.logo-mark {
  font-family: var(--font-en);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}
.logo-sub {
  font-family: var(--font-en);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--color-muted);
}
.site-nav ul {
  list-style: none; display: flex; gap: 2rem;
  margin: 0; padding: 0; align-items: center;
}
.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--color-primary); }
.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
}
.nav-cta:hover { background: var(--color-primary-dark); color: #fff !important; }

/* Hero */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex; align-items: center;
  overflow: hidden;
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(8, 30, 50, 0.85), rgba(15, 61, 92, 0.7));
}
.hero-content {
  position: relative; z-index: 2;
  padding: 6rem 24px;
}
.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 2rem;
}
.hero-title span { display: block; }
.hero-lead {
  font-size: 1.1rem;
  line-height: 1.9;
  margin-bottom: 2.5rem;
  opacity: 0.95;
}
.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
}

/* About */
.about { padding: 7rem 0; }
.about-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about-text p { color: var(--color-muted); line-height: 1.9; }
.about-text .lead { color: var(--color-text); }
.about-image img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

/* Service */
.service {
  padding: 7rem 0;
  background: var(--color-soft);
}
.service-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.step-card {
  background: var(--color-surface);
  padding: 2.25rem;
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
  transition: transform 0.25s, box-shadow 0.25s;
}
.step-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}
.step-num {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.75rem;
}
.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}
.step-card p {
  font-size: 0.92rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.8;
}

/* Features */
.features {
  padding: 7rem 0;
  background: var(--color-dark);
  color: #fff;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}
.feature-card {
  padding: 2.5rem 2rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  transition: background 0.25s, border-color 0.25s;
}
.feature-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(232, 160, 60, 0.5);
}
.feature-icon {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: 1rem;
}
.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  color: #fff;
}
.feature-card p {
  color: rgba(255,255,255,0.7);
  font-size: 0.92rem;
  line-height: 1.9;
  margin: 0;
}

/* Company */
.company { padding: 7rem 0; }
.company-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}
.company-image img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: var(--radius);
}
.company-table {
  width: 100%;
  border-collapse: collapse;
}
.company-table th,
.company-table td {
  padding: 1.25rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.95rem;
  vertical-align: top;
  line-height: 1.7;
}
.company-table th {
  width: 38%;
  font-weight: 500;
  color: var(--color-primary);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* Contact */
.contact { padding: 7rem 0; background: var(--color-soft); }
.contact-form {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}
.contact-form label em {
  font-style: normal;
  color: var(--color-accent);
  margin-left: 0.25rem;
}
.contact-form input,
.contact-form textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 61, 92, 0.1);
}
.contact-form textarea { resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.contact-form button { align-self: center; margin-top: 1rem; }

/* Footer */
.site-footer { background: var(--color-dark); color: rgba(255,255,255,0.85); }
.footer-inner {
  padding: 4rem 0 2.5rem;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
}
.footer-brand .footer-logo {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.25rem;
}
.footer-brand .footer-tagline {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin: 0;
}
.footer-info p {
  font-size: 0.88rem;
  line-height: 1.9;
  margin: 0 0 0.25rem;
  color: rgba(255,255,255,0.75);
}
.footer-info p:first-child { color: #fff; font-weight: 500; }
.footer-copy {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.5rem 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}
.footer-copy p { margin: 0; text-align: center; }

/* Responsive */
@media (max-width: 900px) {
  .site-nav ul { gap: 1.25rem; }
  .site-nav a { font-size: 0.82rem; }
  .nav-cta { padding: 0.4rem 0.9rem; }
  .hero { min-height: 75vh; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .about, .service, .features, .company, .contact { padding: 4.5rem 0; }
  .about-inner, .company-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-image, .company-image { order: -1; }
  .service-steps, .features-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .header-inner { height: 64px; }
  .site-nav ul li:nth-child(-n+3) { display: none; }
  .container { padding: 0 20px; }
}