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

:root {
  --steel-900: #0F1A26;
  --steel-800: #1A2B3C;
  --steel-700: #243447;
  --steel-600: #334E68;
  --steel-500: #486581;
  --steel-400: #627D98;
  --steel-300: #829AB1;
  --steel-200: #BCCCDC;
  --steel-100: #D9E2EC;
  --steel-50: #F0F4F8;
  --orange-600: #C25A0A;
  --orange-500: #E87722;
  --orange-400: #F0904A;
  --orange-100: #FDEBD8;
  --bg: #F7F8FA;
  --white: #FFFFFF;
  --text: #1A2B3C;
  --text-secondary: #486581;
  --text-muted: #829AB1;
  --border: #E2E8F0;
  --shadow-sm: 0 1px 3px rgba(15,26,38,0.08);
  --shadow-md: 0 4px 12px rgba(15,26,38,0.1);
  --shadow-lg: 0 12px 32px rgba(15,26,38,0.12);
  --radius: 6px;
  --radius-lg: 12px;
  --nav-height: 72px;
  --font-display: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== Blueprint Grid Background ===== */
.blueprint-grid {
  background-image:
    linear-gradient(rgba(26,43,60,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,43,60,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--steel-800);
  letter-spacing: -0.02em;
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.nav-links a:hover {
  color: var(--steel-800);
  background: var(--steel-50);
}

.nav-links a.active {
  color: var(--orange-500);
  background: var(--orange-100);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--orange-500);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--orange-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(232,119,34,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--steel-800);
  border: 1.5px solid var(--steel-300);
}

.btn-outline:hover {
  border-color: var(--steel-600);
  background: var(--steel-50);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 15px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--steel-800);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== Page Container ===== */
.page {
  display: none;
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.page.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--steel-900);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.4;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,26,38,0.92) 0%, rgba(26,43,60,0.72) 50%, rgba(15,26,38,0.55) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 32px;
  width: 100%;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--orange-400);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 24px;
  padding: 6px 14px;
  border: 1px solid rgba(232,119,34,0.3);
  border-radius: 100px;
  background: rgba(232,119,34,0.08);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 720px;
  margin-bottom: 24px;
}

.hero h1 span {
  color: var(--orange-400);
}

.hero p {
  font-size: 18px;
  color: var(--steel-200);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-actions .btn-outline {
  color: var(--white);
  border-color: rgba(255,255,255,0.3);
}

.hero-actions .btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

.hero-stats {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.hero-stat {
  border-top: 2px solid rgba(255,255,255,0.15);
  padding-top: 16px;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--white);
}

.hero-stat-label {
  font-size: 13px;
  color: var(--steel-300);
  margin-top: 4px;
}

/* ===== Section Common ===== */
.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--orange-500);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  color: var(--steel-800);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Service Cards ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  cursor: pointer;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-400);
}

.service-card-image {
  height: 220px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.service-card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(15,26,38,0.5) 100%);
}

.service-card-body {
  padding: 28px;
}

.service-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--orange-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.service-card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--orange-500);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--orange-500);
}

.service-card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.service-card:hover .service-card-link svg {
  transform: translateX(4px);
}

/* ===== Why Choose Us ===== */
.why-section {
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.why-item {
  text-align: center;
  padding: 32px 20px;
}

.why-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--steel-50);
  border: 2px solid var(--steel-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--orange-500);
}

.why-item h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 8px;
}

.why-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Process Section ===== */
.process-section {
  background: var(--steel-900);
  color: var(--white);
}

.process-section .section-title { color: var(--white); }
.process-section .section-desc { color: var(--steel-300); }

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}

.process-step {
  text-align: center;
  padding: 0 16px;
  position: relative;
}

.process-step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--orange-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  position: relative;
  z-index: 2;
}

.process-step h4 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 13px;
  color: var(--steel-300);
  line-height: 1.6;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px;
  right: -50%;
  width: 100%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--steel-600) 0, var(--steel-600) 6px, transparent 6px, transparent 12px);
  z-index: 1;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--steel-800) 0%, var(--steel-900) 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 17px;
  color: var(--steel-300);
  margin-bottom: 32px;
}

/* ===== Service Detail Page ===== */
.service-hero {
  padding: 80px 0 64px;
  background: var(--steel-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.service-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.service-hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.service-hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.service-hero-text p {
  font-size: 17px;
  color: var(--steel-300);
  line-height: 1.7;
  margin-bottom: 32px;
}

.service-hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
}

/* ===== Capability Grid ===== */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.capability-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.2s ease;
}

.capability-card:hover {
  border-color: var(--orange-400);
  box-shadow: var(--shadow-md);
}

.capability-card h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.capability-card h4::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--orange-500);
  border-radius: 2px;
}

.capability-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Spec Table ===== */
.spec-section {
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
}

.spec-block h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--orange-500);
  display: inline-block;
}

.spec-list {
  list-style: none;
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.spec-list li:last-child { border-bottom: none; }

.spec-list .spec-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.spec-list .spec-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--steel-800);
  font-weight: 500;
}

/* ===== Material Tags ===== */
.material-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.material-tag {
  padding: 8px 16px;
  background: var(--steel-50);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--steel-700);
  transition: all 0.2s ease;
}

.material-tag:hover {
  background: var(--orange-100);
  border-color: var(--orange-400);
  color: var(--orange-600);
}

/* ===== About Page ===== */
.about-hero {
  padding: 80px 0 64px;
  background: var(--steel-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.about-hero-content {
  position: relative;
  z-index: 2;
}

.about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.about-hero p {
  font-size: 18px;
  color: var(--steel-300);
  max-width: 720px;
  line-height: 1.7;
}

.about-image {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  aspect-ratio: 21/9;
  background-size: cover;
  background-position: center;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.value-card {
  padding: 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.value-card h4 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 12px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Quality Section ===== */
.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.quality-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-lg);
}

.quality-content h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--steel-800);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.quality-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.quality-list {
  list-style: none;
  display: grid;
  gap: 14px;
}

.quality-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--steel-700);
}

.quality-list li svg {
  width: 20px;
  height: 20px;
  stroke: var(--orange-500);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Equipment Gallery ===== */
.equipment-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.equipment-photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  background: var(--white);
  transition: all 0.3s ease;
}

.equipment-photo:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.equipment-photo-img {
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
}

.equipment-photo-label {
  padding: 16px 20px;
}

.equipment-photo-label h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 4px;
}

.equipment-photo-label p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Cases / Industry Applications Page ===== */
.case-sector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}
.case-sector:last-child { border-bottom: none; }
.case-sector.reverse .case-sector-text { order: 2; }
.case-sector.reverse .case-gallery { order: 1; }
.case-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--orange-500);
  letter-spacing: 0.18em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.case-index::after {
  content: '';
  width: 56px;
  height: 1px;
  background: var(--orange-400);
}
.case-sector-text h3 {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 700;
  color: var(--steel-800);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.case-sector-text > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 22px;
}
.case-points {
  list-style: none;
  margin-bottom: 26px;
  display: grid;
  gap: 11px;
}
.case-points li {
  position: relative;
  padding-left: 30px;
  font-size: 14px;
  color: var(--steel-700);
  line-height: 1.55;
}
.case-points li svg {
  position: absolute;
  left: 0;
  top: 2px;
  width: 18px;
  height: 18px;
  stroke: var(--orange-500);
}
.case-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.case-shot {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.case-shot:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--orange-400);
}
.case-shot-img {
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
  background-color: var(--steel-50);
}
.case-shot-cap { padding: 13px 16px 15px; }
.case-shot-cap h5 {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 3px;
  line-height: 1.4;
}
.case-shot-cap p {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.about-cases-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--orange-500);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
}
.about-cases-entry-text h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--steel-800);
  margin: 10px 0;
}
.about-cases-entry-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 660px;
}
.about-cases-entry .btn { flex-shrink: 0; }

/* ===== Contact Page ===== */
.contact-hero {
  padding: 80px 0 64px;
  background: var(--steel-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.contact-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.contact-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-hero p {
  font-size: 18px;
  color: var(--steel-300);
  line-height: 1.7;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--steel-800);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-info-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(232,119,34,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--orange-400);
}

.contact-item-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--steel-400);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 15px;
  color: var(--white);
  font-weight: 500;
  line-height: 1.5;
}

/* ===== Form ===== */
.contact-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

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

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--steel-700);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--orange-500);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(232,119,34,0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-upload {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--bg);
}

.form-upload:hover {
  border-color: var(--orange-400);
  background: var(--orange-100);
}

.form-upload p {
  font-size: 14px;
  color: var(--text-secondary);
}

.form-upload p strong {
  color: var(--orange-500);
}

/* ===== Footer ===== */
.footer {
  background: var(--steel-900);
  color: var(--steel-300);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand h3 img { height: 28px; }

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--steel-400);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--orange-400);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--steel-500);
}

/* ===== Cases / Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.project-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(15,26,38,0.85);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  backdrop-filter: blur(4px);
}

.project-body {
  padding: 24px;
}

.project-body h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--steel-800);
  margin-bottom: 8px;
}

.project-body p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .process-step:not(:last-child)::after { display: none; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .equipment-gallery { grid-template-columns: repeat(2, 1fr); }
  .case-sector { gap: 40px; padding: 48px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav-cta .btn-outline { display: none; }
  .nav-cta .btn-primary { display: none; }
  .lang-btn { padding: 8px 9px; font-size: 12px; }
  .lang-btn svg:first-child { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; gap: 32px; }
  .capability-grid { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; gap: 32px; }
  .projects-grid { grid-template-columns: 1fr; }
  .equipment-gallery { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .quality-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .service-hero-content { grid-template-columns: 1fr; gap: 32px; }
  .case-sector { grid-template-columns: 1fr; gap: 28px; padding: 40px 0; }
  .case-sector.reverse .case-sector-text { order: 1; }
  .case-sector.reverse .case-gallery { order: 2; }
  .case-gallery { gap: 14px; }
  .about-cases-entry { flex-direction: column; align-items: flex-start; gap: 20px; padding: 28px 24px; }
  .section { padding: 64px 0; }
  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.mobile-menu.open { display: block; }

.mobile-menu a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius);
}

.mobile-menu a:hover,
.mobile-menu a.active {
  background: var(--steel-50);
  color: var(--orange-500);
}

/* ===== Language Switcher ===== */
.lang-switcher { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 12px; border: 1.5px solid var(--border);
  border-radius: var(--radius); background: var(--white);
  font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 600;
  color: var(--steel-700); cursor: pointer; transition: all .2s ease;
  white-space: nowrap;
}
.lang-btn svg { width: 16px; height: 16px; }
.lang-btn .lang-caret { transition: transform .2s ease; }
.lang-btn:hover { border-color: var(--steel-400); }
.lang-switcher.open .lang-caret { transform: rotate(180deg); }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  min-width: 172px; padding: 6px; display: none; z-index: 1100;
}
.lang-switcher.open .lang-menu { display: block; }
.lang-menu a {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 10px 12px; border: none; background: none;
  font-family: 'Inter', sans-serif; font-size: 14px; color: var(--text-secondary);
  border-radius: 6px; text-align: left; cursor: pointer; transition: all .15s ease;
}
.lang-menu a:hover { background: var(--steel-50); color: var(--steel-900); }
.lang-menu a.active { color: var(--orange-500); font-weight: 600; }
.lang-menu a .lang-check { opacity: 0; width: 15px; height: 15px; }
.lang-menu a.active .lang-check { opacity: 1; }
.mobile-lang-row {
  display: flex; gap: 6px; padding: 12px 16px 16px;
  border-top: 1px solid var(--border); margin-top: 6px; flex-wrap: wrap;
}
.mobile-lang-row a {
  flex: 1; min-width: 56px; padding: 8px 4px; border: 1.5px solid var(--border);
  background: var(--white); border-radius: var(--radius); font-size: 13px;
  font-weight: 600; color: var(--text-secondary); cursor: pointer;
}
.mobile-lang-row button.active { border-color: var(--orange-500); color: var(--orange-500); }