/* ============================================
   DESIGN SYSTEM — Dark Industrial Cinematic
   ============================================ */
:root {
  --bg: #08080C;
  --bg-surface: #0F1014;
  --bg-card: #151619;
  --bg-elevated: #1C1D22;
  --text: #E4E4E8;
  --text-muted: #7A7C8A;
  --text-dim: #404150;
  --accent: #EF4444;
  --accent-hover: #F87171;
  --accent-glow: rgba(239, 68, 68, 0.12);
  --accent-glow-strong: rgba(239, 68, 68, 0.25);
  --accent-warm: #F59E0B;
  --border: rgba(255,255,255,0.06);
  --border-accent: rgba(239, 68, 68, 0.2);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --text-hero: clamp(44px, 7vw, 88px);
  --text-h2: clamp(32px, 5vw, 60px);
  --text-h3: clamp(20px, 2.5vw, 28px);
  --text-body: 16px;
  --text-small: 14px;
  --text-caption: 12px;
  --text-label: 11px;
  --space-section: clamp(100px, 14vw, 180px);
  --space-group: clamp(48px, 7vw, 80px);
  --space-element: clamp(16px, 2vw, 24px);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'IBM Plex Sans', 'Noto Sans JP', sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 80px);
}

/* Grain Overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px;
}

/* ============================================
   Scroll Animation
   ============================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
.stagger-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.animate-on-scroll.visible .stagger-item { opacity: 1; transform: translateY(0); }
.animate-on-scroll.visible .stagger-item:nth-child(1) { transition-delay: 0.05s; }
.animate-on-scroll.visible .stagger-item:nth-child(2) { transition-delay: 0.12s; }
.animate-on-scroll.visible .stagger-item:nth-child(3) { transition-delay: 0.19s; }
.animate-on-scroll.visible .stagger-item:nth-child(4) { transition-delay: 0.26s; }
.animate-on-scroll.visible .stagger-item:nth-child(5) { transition-delay: 0.33s; }
.animate-on-scroll.visible .stagger-item:nth-child(6) { transition-delay: 0.40s; }

/* ============================================
   Section Header
   ============================================ */
.section-header { margin-bottom: var(--space-group); }
.section-header.center { text-align: center; }
.section-label {
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}
.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text);
  letter-spacing: -0.03em;
}
.section-subtitle {
  font-size: var(--text-body);
  color: var(--text-muted);
  margin-top: 20px;
  max-width: 520px;
  line-height: 1.8;
}
.section-header.center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: 0.02em;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow-strong);
  filter: brightness(1.1);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-secondary:hover {
  border-color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  transform: translateY(-2px);
}

/* ============================================
   Header
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 20px 0;
}
header.scrolled {
  background: rgba(8, 8, 12, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.01em;
}
.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.desktop-nav a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
  transition: color 0.2s;
}
.desktop-nav a:hover { color: var(--text); }
.desktop-nav .nav-cta {
  padding: 10px 24px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.3s;
}
.desktop-nav .nav-cta:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1002;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: all 0.3s;
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background: var(--bg);
  z-index: 1001;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 100px 32px 40px;
  display: flex;
  flex-direction: column;
}
.mobile-menu.open { right: 0; }
.mobile-menu a {
  display: block;
  padding: 18px 0;
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.02em;
}
.mobile-menu .mobile-cta {
  margin-top: 32px;
  padding: 18px 0;
  background: var(--accent);
  color: #fff;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  border-radius: 4px;
  border-bottom: none;
}
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 1000;
}
.overlay.open { opacity: 1; pointer-events: auto; }

/* ============================================
   HERO
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  filter: saturate(0.5);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(8,8,12,0.3) 0%,
    rgba(8,8,12,0.6) 50%,
    var(--bg) 100%
  );
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  border-radius: 4px;
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--accent-hover);
  margin-bottom: 32px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: var(--text-hero);
  font-weight: 700;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
}
.hero-title span { color: var(--accent); }
.hero-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 520px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.hero-stats {
  display: flex;
  gap: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.hero-stat-value {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.hero-stat-value span {
  font-size: 20px;
  color: var(--accent);
}
.hero-stat-label {
  font-size: var(--text-label);
  color: var(--text-dim);
  margin-top: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ============================================
   SERVICE
   ============================================ */
.service-section {
  padding: var(--space-section) 0;
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.service-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.service-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}
.service-name {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.service-desc {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================
   STRENGTH
   ============================================ */
.strength-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.strength-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.strength-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.strength-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.strength-label {
  font-size: var(--text-small);
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}
.strength-desc {
  font-size: var(--text-caption);
  color: var(--text-dim);
  line-height: 1.7;
}

/* ============================================
   AREA
   ============================================ */
.area-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.area-content {
  display: flex;
  gap: 80px;
  align-items: center;
}
.area-map {
  flex-shrink: 0;
  width: 240px;
}
.area-map svg {
  width: 100%;
  height: auto;
}
.area-map svg path { fill: rgba(239, 68, 68, 0.08); stroke: var(--accent); stroke-width: 1; }
.area-map svg circle { fill: var(--accent); }
.area-map svg text { fill: var(--accent); font-family: 'IBM Plex Sans', sans-serif; }
.area-info {
  flex: 1;
}
.area-info h3 {
  font-size: var(--text-h3);
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.area-info p {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}
.area-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
}
.area-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-small);
  color: var(--text-muted);
  font-weight: 400;
}
.area-item svg { color: var(--accent); flex-shrink: 0; }

/* ============================================
   FLEET
   ============================================ */
.fleet-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.fleet-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.fleet-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.fleet-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.fleet-icon {
  color: var(--text-dim);
  margin-bottom: 16px;
}
.fleet-type {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.fleet-count {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

/* ============================================
   WORKS (Clients)
   ============================================ */
.works-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.works-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.works-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.works-icon {
  color: var(--text-dim);
  margin-bottom: 14px;
}
.works-name {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--text-muted);
}

/* ============================================
   ENTRY (Recruitment)
   ============================================ */
.entry-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.entry-content {
  display: flex;
  gap: 64px;
  align-items: center;
}
.entry-text {
  flex: 1;
}
.entry-text h2 {
  font-size: var(--text-h2);
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.entry-text p {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}
.entry-buttons { display: flex; gap: 12px; }
.entry-img {
  flex: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
}
.entry-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================
   CTA
   ============================================ */
.cta-section {
  padding: var(--space-section) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}
.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  background: rgba(239, 68, 68, 0.06);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.cta-title {
  font-size: var(--text-h2);
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  line-height: 1.1;
  position: relative;
}
.cta-text {
  font-size: var(--text-body);
  color: var(--text-muted);
  margin-bottom: 44px;
  line-height: 1.8;
  position: relative;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ============================================
   Footer
   ============================================ */
footer {
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  padding: 72px 0 0;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
.footer-brand .logo-icon { background: var(--accent); }
.footer-desc {
  font-size: var(--text-small);
  line-height: 1.8;
  margin-bottom: 16px;
  color: var(--text-dim);
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-caption);
  color: var(--text-dim);
  margin-bottom: 8px;
}
.footer-contact-item svg { color: var(--text-dim); flex-shrink: 0; }
.footer-nav-title {
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.footer-nav-list a {
  display: block;
  font-size: var(--text-small);
  color: var(--text-dim);
  padding: 5px 0;
  transition: color 0.2s;
}
.footer-nav-list a:hover { color: var(--text-muted); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: var(--text-caption);
  color: var(--text-dim);
}
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { color: var(--text-dim); transition: color 0.2s; }
.footer-bottom-links a:hover { color: var(--text-muted); }

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.back-to-top.show { opacity: 1; transform: translateY(0); }
.back-to-top:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================
   Phase 3 — Shared Subpage Styles
   ============================================ */
.nav-link.active { color: var(--text) !important; }

.page-hero {
  padding: 160px 0 60px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-caption);
  color: var(--text-dim);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-dim); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--text-muted); }
.breadcrumb-sep { color: var(--text-dim); }
.page-title {
  font-size: var(--text-h2);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.page-subtitle {
  font-size: var(--text-small);
  color: var(--text-dim);
  margin-top: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
}

.cta-band {
  padding: 80px 0;
  text-align: center;
  background: rgba(255,255,255,0.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-band h2 {
  font-size: var(--text-h3);
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.cta-band p {
  font-size: var(--text-body);
  color: var(--text-muted);
  margin-bottom: 32px;
}

.section-more {
  text-align: center;
  margin-top: var(--space-group);
}
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--accent);
  transition: gap 0.2s;
}
.more-link:hover { gap: 12px; }
.more-link span { transition: transform 0.2s; }

/* ============================================
   Phase 3 — About Page
   ============================================ */
.about-message-section {
  padding: var(--space-section) 0;
}
.about-message-grid {
  display: flex;
  gap: 64px;
  align-items: flex-start;
}
.about-message-img {
  flex-shrink: 0;
  width: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about-message-img img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3/4;
}
.about-message-text {
  flex: 1;
}
.about-message-text p {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 2;
  margin-bottom: 20px;
}
.about-message-name {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--text);
  margin-top: 32px;
}

.about-info-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.about-info-table-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.about-info-table {
  width: 100%;
  border-collapse: collapse;
}
.about-info-table th,
.about-info-table td {
  padding: 18px 20px;
  font-size: var(--text-small);
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.about-info-table th {
  width: 160px;
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}
.about-info-table td {
  color: var(--text);
}

.about-history-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.about-history-list {
  max-width: 720px;
  margin: 0 auto;
}
.about-history-item {
  display: flex;
  gap: 32px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.about-history-year {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  width: 80px;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.about-history-item p {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.8;
}

.about-iso-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.about-iso-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.about-iso-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.about-iso-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.about-iso-badge {
  display: inline-block;
  padding: 6px 20px;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  border-radius: 4px;
  font-size: var(--text-small);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.about-iso-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}
.about-iso-card p {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================
   Phase 3 — Works Page
   ============================================ */
.works-numbers-section {
  padding: var(--space-section) 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.works-numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}
.works-number-item {
  padding: 32px 16px;
}
.works-number-value {
  font-size: 48px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  display: block;
  margin-bottom: 12px;
}
.works-number-value span {
  font-size: 24px;
  color: var(--accent);
}
.works-number-label {
  font-size: var(--text-small);
  color: var(--text-muted);
  font-weight: 500;
  display: block;
}

.works-voice-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.works-voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.works-voice-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.works-voice-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
}
.works-voice-text {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 24px;
}
.works-voice-name {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--text-dim);
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ============================================
   Phase 3 — Contact / Form / FAQ
   ============================================ */
.contact-form-section {
  padding: var(--space-section) 0;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-form-wrap .section-header {
  margin-bottom: 32px;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-label {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-muted);
}
.form-required {
  font-size: var(--text-caption);
  color: var(--accent);
  font-weight: 600;
}
.form-input {
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--text-small);
  color: var(--text);
  transition: border-color 0.2s;
  outline: none;
  width: 100%;
}
.form-input:focus {
  border-color: var(--accent);
}
.form-input::placeholder {
  color: var(--text-dim);
}
.form-textarea {
  resize: vertical;
  min-height: 120px;
}
.form-radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.form-radio {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-small);
  color: var(--text-muted);
  cursor: pointer;
}
.form-radio input[type="radio"] {
  accent-color: var(--accent);
}
.form-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-small);
  color: var(--text-muted);
  cursor: pointer;
}
.form-checkbox input[type="checkbox"] {
  accent-color: var(--accent);
}

.contact-info-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 100px;
}
.contact-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}
.contact-info-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}
.contact-info-card p {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.7;
}
.contact-phone {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.contact-hours {
  font-size: var(--text-caption);
  color: var(--text-dim);
}

.faq-section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--border);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.faq-question {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.5;
}
.faq-q {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-answer {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.9;
  padding-left: 42px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .strength-grid { grid-template-columns: repeat(2, 1fr); }
  .fleet-grid { grid-template-columns: repeat(2, 1fr); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .entry-content { flex-direction: column; gap: 40px; }
  .area-content { flex-direction: column; gap: 40px; }
  .area-map { width: 180px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .about-message-grid { flex-direction: column; gap: 40px; }
  .about-message-img { width: 100%; max-width: 400px; }
  .about-iso-grid { grid-template-columns: 1fr; }
  .works-numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .works-voice-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-info-side { position: static; }
}

@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .hamburger { display: flex; }

  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero-title { font-size: clamp(32px, 9vw, 48px); }
  .hero-buttons { flex-direction: column; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }

  .service-grid { grid-template-columns: 1fr; }
  .strength-grid { grid-template-columns: 1fr 1fr; }
  .fleet-grid { grid-template-columns: 1fr 1fr; }
  .works-grid { grid-template-columns: 1fr 1fr; }
  .area-list { grid-template-columns: 1fr; }

  .page-hero { padding: 120px 0 48px; }
  .form-row { grid-template-columns: 1fr; }
  .form-radio-group { flex-direction: column; gap: 10px; }
  .about-info-table th { width: 120px; }
  .about-history-item { gap: 20px; }
  .about-history-year { font-size: 20px; width: 60px; }

  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .strength-grid { grid-template-columns: 1fr; }
  .fleet-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: 1fr; }
  .works-numbers-grid { grid-template-columns: 1fr; }
  .about-info-table th,
  .about-info-table td { display: block; width: 100%; padding: 8px 0; }
  .about-info-table th { border-bottom: none; padding-bottom: 0; }
}