/* ============================================================
   CSS Variables
   ============================================================ */
:root {
  --color-primary: #0a2463;
  --color-accent: #3e92cc;
  --color-accent-light: #d8ecf7;
  --color-text: #1a1a2e;
  --color-text-light: #555;
  --color-bg: #ffffff;
  --color-bg-gray: #f5f7fa;
  --color-border: #e0e6ef;
  --font-base: 'Noto Sans JP', 'Inter', sans-serif;
  --max-width: 1100px;
  --header-height: 68px;
  --radius: 8px;
  --shadow: 0 2px 16px rgba(10, 36, 99, 0.08);
  --transition: 0.25s ease;
}

/* ============================================================
   Base
   ============================================================ */
body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

section {
  padding: 80px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 560px;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-accent);
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.global-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}

.global-nav a:hover {
  color: var(--color-accent);
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 4px;
  font-size: 0.875rem !important;
  transition: background var(--transition) !important;
}

.nav-cta:hover {
  background: var(--color-accent) !important;
  color: #fff !important;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8f0f8 100%);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 36px;
  line-height: 1.8;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent);
}

.btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-illustration {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(10, 36, 99, 0.2);
}

.hero-illustration::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  top: -40px;
  right: -40px;
}

.hero-illustration::after {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  bottom: -20px;
  left: -20px;
}

.hero-illustration-text {
  color: rgba(255,255,255,0.9);
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  z-index: 1;
}

/* ============================================================
   Stats
   ============================================================ */
.stats {
  padding: 48px 0;
  background: var(--color-primary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.stat-num span {
  font-size: 1.25rem;
  color: var(--color-accent-light);
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-top: 6px;
}

/* ============================================================
   Services
   ============================================================ */
.services {
  background: var(--color-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.service-card {
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ============================================================
   Works
   ============================================================ */
.works {
  background: var(--color-bg-gray);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.work-card {
  display: block;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
  color: inherit;
}

.work-card:hover {
  transform: translateY(-4px);
}

.work-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.work-body {
  padding: 20px;
}

.work-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 2px;
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.work-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
}

/* ============================================================
   News
   ============================================================ */
.news {
  background: var(--color-bg);
}

.news-list {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.news-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 20px 28px;
  background: #fff;
  transition: background var(--transition);
}

.news-item:hover {
  background: var(--color-bg-gray);
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-text-light);
  white-space: nowrap;
  min-width: 90px;
}

.news-cat {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 2px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  white-space: nowrap;
}

.news-title {
  font-size: 0.9rem;
  color: var(--color-text);
  transition: color var(--transition);
}

.news-item:hover .news-title {
  color: var(--color-accent);
}

/* ============================================================
   CTA Banner
   ============================================================ */
.cta-banner {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a3a7a 100%);
  text-align: center;
}

.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 36px;
}

.cta-banner .btn-primary {
  background: var(--color-accent);
  font-size: 1rem;
  padding: 16px 36px;
}

.cta-banner .btn-primary:hover {
  background: #fff;
  color: var(--color-primary);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 32px;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.footer-logo span {
  color: var(--color-accent);
}

.footer-desc {
  font-size: 0.8rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-nav h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
}

.footer-bottom a:hover {
  color: #fff;
}

/* ============================================================
   Page Hero (内部ページ共通)
   ============================================================ */
.page-hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8f0f8 100%);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--color-text-light);
}

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb span {
  color: var(--color-border);
}

/* ============================================================
   About
   ============================================================ */
.mission-block {
  background: var(--color-bg-gray);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  margin-top: 48px;
}

.mission-block blockquote {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 48px;
}

.company-table th, .company-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.company-table th {
  width: 200px;
  color: var(--color-text-light);
  font-weight: 500;
  background: var(--color-bg-gray);
}

.timeline {
  position: relative;
  margin-top: 48px;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-year {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.timeline-content {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ============================================================
   Service (内部ページ)
   ============================================================ */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--color-border);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail.reverse {
  direction: rtl;
}

.service-detail.reverse > * {
  direction: ltr;
}

.service-detail-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.service-detail h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-detail p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-detail ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-detail ul li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.service-detail ul li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

.service-visual {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 12px;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

/* ============================================================
   Works (内部ページ)
   ============================================================ */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 32px 0;
}

.filter-btn {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1.5px solid var(--color-border);
  background: #fff;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn.active, .filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* ============================================================
   Contact
   ============================================================ */
.contact-form-cta {
  background: var(--color-bg-gray);
  border-radius: 12px;
  padding: 48px 40px;
  text-align: center;
  line-height: 1.8;
}

.contact-wrap {
  margin-top: 48px;
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.required-badge {
  font-size: 0.65rem;
  background: #e74c3c;
  color: #fff;
  padding: 1px 5px;
  border-radius: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #e74c3c;
}

.form-error-msg {
  display: none;
  font-size: 0.75rem;
  color: #e74c3c;
  margin-top: 4px;
}

.form-error-msg.show {
  display: block;
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.privacy-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 28px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.privacy-check input {
  width: auto;
  margin-top: 2px;
  accent-color: var(--color-accent);
}

.privacy-check a {
  color: var(--color-accent);
  text-decoration: underline;
}

.form-submit {
  text-align: center;
}

.form-success {
  display: none;
  text-align: center;
  padding: 48px;
  background: var(--color-bg-gray);
  border-radius: var(--radius);
}

.form-success.show {
  display: block;
}

.form-success h3 {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-success p {
  color: var(--color-text-light);
}

/* ============================================================
   Privacy
   ============================================================ */
.privacy-content {
  max-width: 800px;
  margin: 48px auto 0;
  line-height: 1.9;
}

.privacy-content h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 36px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.privacy-content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

/* ============================================================
   Animations
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .hero-illustration {
    max-width: 280px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-grid,
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .service-detail {
    grid-template-columns: 1fr;
  }

  .service-detail.reverse {
    direction: ltr;
  }

  .contact-wrap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  section {
    padding: 60px 0;
  }

  .global-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }

  .global-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .global-nav a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-cta {
    margin: 16px 24px;
    text-align: center;
    border-radius: var(--radius);
  }

  .hamburger {
    display: flex;
  }

  .services-grid,
  .works-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .contact-form .form-row {
    grid-template-columns: 1fr;
  }

  .mission-block {
    padding: 28px 20px;
  }
}