/* ═══════════════════════════════════════════════
   MASS FLOW METER — Industrial B2B Website
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

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

html { scroll-behavior: smooth; font-size: 16px; }

/* ── Variables ── */
:root {
  --navy-950: #070F1C;
  --navy-900: #0B1A30;
  --navy-800: #0F2440;
  --navy-700: #132E50;
  --navy-600: #1A3F6A;
  --navy-500: #25548A;
  --accent: #D4942F;
  --accent-light: #E8B14A;
  --accent-dark: #B87A20;
  --gray-50: #F8F9FB;
  --gray-100: #F0F2F5;
  --gray-200: #DDE1E8;
  --gray-300: #C4CBD9;
  --gray-400: #9BA6B8;
  --gray-500: #78849E;
  --gray-600: #5C6A82;
  --gray-700: #4A5568;
  --gray-800: #2D3748;
  --gray-900: #1A202C;
  --white: #FFFFFF;
  --black: #03070C;
  --font-heading: 'Barlow Condensed', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --container: 1200px;
  --header-h: 76px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(7,15,28,0.08);
  --shadow-md: 0 8px 30px rgba(7,15,28,0.12);
  --shadow-lg: 0 20px 60px rgba(7,15,28,0.18);
  --shadow-accent: 0 4px 20px rgba(212,148,47,0.35);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: var(--font-body);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Utility ── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-dark { background: var(--navy-900); color: var(--gray-100); }
.section-light { background: var(--gray-50); }
.section-border { border-bottom: 1px solid var(--gray-200); }

.section-label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--navy-900);
}
.section-dark .section-title { color: var(--white); }

.section-desc {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 640px;
  line-height: 1.8;
}
.section-dark .section-desc { color: var(--gray-300); }

.text-center { text-align: center; }
.text-center .section-desc { margin: 0 auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  line-height: 1;
}
.btn-primary {
  background: var(--accent);
  color: var(--navy-950);
}
.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-dark {
  background: var(--navy-900);
  color: var(--white);
}
.btn-dark:hover {
  background: var(--navy-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-lg { padding: 18px 40px; font-size: 1.05rem; }

/* ── Header / Navigation ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11,26,48,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
  height: var(--header-h);
}
.header.scrolled {
  background: rgba(11,26,48,0.98);
  box-shadow: 0 4px 30px rgba(0,0,0,0.2);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--navy-950);
}
.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--white);
  letter-spacing: 0.5px;
}
.logo-text span { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  color: var(--gray-300);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}
.nav a:hover,
.nav a.active {
  color: var(--white);
  background: rgba(255,255,255,0.06);
}
.nav .btn {
  margin-left: 12px;
  padding: 10px 24px;
  font-size: 0.85rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--navy-950);
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212,148,47,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,148,47,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
}
.hero-bg-glow {
  position: absolute;
  top: -30%; right: -10%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(212,148,47,0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}
.hero-bg-glow-2 {
  position: absolute;
  bottom: -20%; left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(26,63,106,0.15) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 80px 24px 60px;
  width: 100%;
}

.hero-text { min-width: 0; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(212,148,47,0.12);
  border: 1px solid rgba(212,148,47,0.25);
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 28px;
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.8rem, 5.5vw, 4.2rem);
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 24px;
}
.hero-title span { color: var(--accent); }

.hero-desc {
  font-size: 1.1rem;
  color: var(--gray-400);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 540px;
}

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

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}
.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--gray-300);
}
.hero-feature svg {
  width: 16px; height: 16px;
  flex-shrink: 0;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-product-frame {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  background: radial-gradient(ellipse at 30% 40%, rgba(26,63,106,0.2), transparent 70%);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
  position: relative;
}
.hero-product-frame svg { width: 100%; height: 100%; }
.hero-float-badge {
  position: absolute;
  padding: 12px 20px;
  background: rgba(11,26,48,0.9);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(212,148,47,0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--accent-light);
  text-align: center;
  line-height: 1.3;
}
.hero-float-badge small { display: block; font-weight: 400; color: var(--gray-400); font-size: 0.7rem; letter-spacing: 1px; text-transform: uppercase; margin-top: 2px; }
.float-badge-1 { top: 10%; right: -5%; }
.float-badge-2 { bottom: 15%; left: -8%; }

/* ── Stats ── */
.stats { padding: 60px 0; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.8rem;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--gray-400);
  margin-top: 8px;
  font-weight: 500;
}

/* ── Applications ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.app-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: var(--transition);
  text-align: center;
}
.app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.app-icon {
  width: 60px; height: 60px;
  margin: 0 auto 20px;
  background: var(--navy-900);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.app-icon svg { width: 28px; height: 28px; }
.app-card h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--navy-900);
  margin-bottom: 10px;
}
.app-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ── Tech Advantages ── */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 60px;
  align-items: center;
  margin-top: 48px;
}
.tech-list { display: flex; flex-direction: column; gap: 24px; }
.tech-item {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.tech-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(212,148,47,0.2);
  transform: translateX(6px);
}
.tech-item-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  background: rgba(212,148,47,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.tech-item-icon svg { width: 22px; height: 22px; }
.tech-item h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 4px;
}
.tech-item p {
  font-size: 0.85rem;
  color: var(--gray-400);
  line-height: 1.5;
}

.tech-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.tech-visual-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.tech-visual-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(212,148,47,0.15);
}
.tech-visual-card .big-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.2rem;
  color: var(--accent);
  line-height: 1;
}
.tech-visual-card .label {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-top: 8px;
  font-weight: 500;
}

/* ── Certifications ── */
.cert-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
}
.cert-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 28px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy-800);
}
.cert-item svg { width: 28px; height: 28px; flex-shrink: 0; }

/* ── CTA ── */
.cta-section {
  background: var(--navy-900);
  text-align: center;
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 70% 50%, rgba(212,148,47,0.06) 0%, transparent 60%);
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--white);
  margin-bottom: 16px;
}
.cta-section p {
  color: var(--gray-400);
  margin-bottom: 36px;
  font-size: 1.05rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ── Footer ── */
.footer {
  background: var(--navy-950);
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-top: 16px;
  max-width: 320px;
  line-height: 1.7;
}
.footer h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.footer a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.9rem;
  display: block;
  padding: 4px 0;
  transition: var(--transition);
}
.footer a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.footer-contact-item svg { width: 16px; height: 16px; flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--gray-600);
}

/* ── Image Placeholder (Product Gallery) ── */
.gallery-grid {
  display: grid;
  gap: 24px;
  margin-top: 48px;
}
.gallery-grid-3 {
  grid-template-columns: 1.2fr 1fr 1fr;
  grid-template-rows: auto auto;
}
.gallery-grid-2 {
  grid-template-columns: 1fr 1fr;
}

.img-placeholder {
  position: relative;
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  padding: 24px;
  min-height: 260px;
  transition: var(--transition);
  overflow: hidden;
  cursor: pointer;
}
.img-placeholder:hover {
  border-color: var(--accent);
  background: rgba(212,148,47,0.04);
  box-shadow: var(--shadow-sm);
}
.img-placeholder .pl-icon {
  width: 52px; height: 52px;
  color: var(--gray-300);
  opacity: 0.6;
}
.img-placeholder:hover .pl-icon {
  color: var(--accent);
  opacity: 0.8;
}
.img-placeholder .pl-label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  text-align: center;
}
.img-placeholder .pl-hint {
  font-size: 0.8rem;
  color: var(--gray-400);
  text-align: center;
  line-height: 1.5;
}
.img-placeholder-main {
  grid-row: span 2;
  min-height: 420px;
}
.img-placeholder .pl-corner {
  position: absolute;
  top: 8px; right: 10px;
  font-size: 0.65rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--gray-300);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Dark variant for dark sections */
.img-placeholder-dark {
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.02);
}
.img-placeholder-dark .pl-icon { color: rgba(255,255,255,0.15); }
.img-placeholder-dark .pl-label { color: rgba(255,255,255,0.3); }
.img-placeholder-dark .pl-hint { color: rgba(255,255,255,0.2); }
.img-placeholder-dark .pl-corner { color: rgba(255,255,255,0.15); }
.img-placeholder-dark:hover {
  border-color: rgba(212,148,47,0.3);
  background: rgba(212,148,47,0.05);
}

/* ── Configuration Grid (dark variant) ── */
.config-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.config-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  transition: var(--transition);
}
.config-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(212,148,47,0.2);
  transform: translateY(-3px);
}
.config-card h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.config-card h4 svg { width: 20px; height: 20px; flex-shrink: 0; }
.config-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.config-card ul li {
  font-size: 0.85rem;
  color: var(--gray-400);
  padding: 5px 0;
  line-height: 1.5;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.config-card ul li:last-child { border-bottom: none; }
.config-card ul li strong { color: var(--accent-light); font-family: var(--font-heading); font-weight: 500; }

/* ── Version Comparison Table ── */
.version-table { font-size: 0.85rem; }
.version-table th {
  background: var(--navy-800);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 14px 16px;
  text-align: left;
}
.version-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.version-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.version-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
  font-size: 0.83rem;
}
.version-table tr:nth-child(even) td { background: var(--gray-50); }
.version-table tr:hover td { background: rgba(212,148,47,0.04); }
.version-table .feature-label {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--navy-900);
  font-size: 0.85rem;
  white-space: nowrap;
}
.version-table .check { color: var(--accent); font-weight: bold; }
.version-table .dash { color: var(--gray-300); }
.version-table .series-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.series-badge-std { background: rgba(26,63,106,0.12); color: var(--navy-600); }
.series-badge-ht  { background: rgba(212,148,47,0.12); color: var(--accent-dark); }
.series-badge-sn  { background: rgba(45,138,78,0.12); color: #1a6b3a; }
.series-badge-ep  { background: rgba(200,50,50,0.10); color: #b03030; }

/* ═══════════════════════════════════════════════
   PRODUCT PAGE SPECIFIC
   ═══════════════════════════════════════════════ */

/* ── Product Hero ── */
.product-hero {
  background: var(--navy-950);
  padding: calc(var(--header-h) + 60px) 0 60px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.product-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

/* Carousel */
.carousel {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
}
.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.carousel-slide {
  min-width: 100%;
  aspect-ratio: 1 / 0.85;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
}
.carousel-slide svg { width: 80%; height: 80%; }
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px; height: 40px;
  background: rgba(11,26,48,0.8);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 2;
}
.carousel-btn:hover { background: var(--accent); border-color: var(--accent); }
.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 12px;
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  z-index: 2;
}
.carousel-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.carousel-dot.active { background: var(--accent); width: 24px; border-radius: 4px; }

.product-info h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--white);
  margin-bottom: 8px;
}
.product-info .subtitle {
  color: var(--accent);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.product-info .desc {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}
.product-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.product-highlights .tag {
  padding: 6px 14px;
  background: rgba(212,148,47,0.1);
  border: 1px solid rgba(212,148,47,0.2);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--accent-light);
  font-weight: 500;
}
.product-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ── Product Content Sections ── */
.prod-section { padding: 80px 0; }
.prod-section h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--navy-900);
  margin-bottom: 12px;
}
.prod-section .lead {
  color: var(--gray-500);
  margin-bottom: 40px;
  max-width: 700px;
}

/* Technical Specs Table */
.specs-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.specs-table th {
  background: var(--navy-800);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 14px 20px;
  text-align: left;
}
.specs-table td {
  padding: 12px 20px;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}
.specs-table tr:nth-child(even) td { background: var(--gray-50); }
.specs-table tr:hover td { background: rgba(212,148,47,0.04); }

/* Advantage cards - product page */
.prod-adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.prod-adv-card {
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.prod-adv-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.prod-adv-card .icon { margin-bottom: 16px; }
.prod-adv-card h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--navy-900);
  margin-bottom: 8px;
}
.prod-adv-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Working Principle */
.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.principle-visual {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 0.7;
}
.principle-steps { display: flex; flex-direction: column; gap: 16px; }
.principle-step {
  display: flex;
  gap: 16px;
  padding: 16px 20px;
  border-left: 3px solid var(--gray-200);
  transition: var(--transition);
}
.principle-step:hover { border-left-color: var(--accent); background: var(--gray-50); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.principle-step .num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
  min-width: 32px;
}
.principle-step h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy-900);
  margin-bottom: 4px;
}
.principle-step p { font-size: 0.88rem; color: var(--gray-500); line-height: 1.5; }

/* Model Specs Table */
.model-table { font-size: 0.85rem; }
.model-table th { background: var(--navy-900); }

/* Inquiry Form (shared) */
.inquiry-form {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 48px;
  max-width: 720px;
  margin: 0 auto;
}
.inquiry-form h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--navy-900);
  margin-bottom: 8px;
}
.inquiry-form .sub { color: var(--gray-500); margin-bottom: 32px; font-size: 0.95rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--gray-700);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--gray-900);
  background: var(--white);
  transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(212,148,47,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ═══════════════════════════════════════════════
   ABOUT PAGE
   ═══════════════════════════════════════════════ */
.page-hero {
  background: var(--navy-950);
  padding: calc(var(--header-h) + 60px) 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212,148,47,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,148,47,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  color: var(--white);
  margin-bottom: 16px;
}
.page-hero p {
  color: var(--gray-400);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.about-company { padding: 80px 0; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-visual {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 40px;
  aspect-ratio: 1 / 0.75;
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.value-card {
  text-align: center;
  padding: 36px 24px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.value-card:hover {
  border-color: rgba(212,148,47,0.2);
  transform: translateY(-4px);
}
.value-card .num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.5rem;
  color: var(--accent);
}
.value-card h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin: 12px 0 8px;
}
.value-card p { font-size: 0.88rem; color: var(--gray-400); line-height: 1.5; }

/* ═══════════════════════════════════════════════
   CONTACT PAGE
   ═══════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  padding: 80px 0;
}
.contact-info-cards { display: flex; flex-direction: column; gap: 20px; }
.contact-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.contact-card-icon {
  width: 48px; height: 48px;
  flex-shrink: 0;
  background: var(--navy-900);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card-icon svg { width: 22px; height: 22px; }
.contact-card h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy-900);
  margin-bottom: 4px;
}
.contact-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.5;
}
.contact-card a {
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 500;
}
.contact-card a:hover { text-decoration: underline; }
.timezone-note {
  padding: 16px 24px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ═══════════════════════════════════════════════
   FAQ PAGE
   ═══════════════════════════════════════════════ */
.faq-section { padding: 80px 0; }
.faq-list { max-width: 800px; margin: 48px auto 0; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--gray-300); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 28px;
  cursor: pointer;
  background: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--navy-900);
  transition: var(--transition);
  user-select: none;
}
.faq-question:hover { background: var(--gray-50); }
.faq-question .arrow {
  width: 20px; height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--gray-400);
}
.faq-item.open .faq-question .arrow { transform: rotate(180deg); color: var(--accent); }
.faq-item.open .faq-question { color: var(--accent-dark); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 28px;
  background: var(--gray-50);
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 20px 28px;
}
.faq-answer p {
  font-size: 0.92rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .hero-product-frame { max-width: 360px; }
  .float-badge-1 { right: 0; top: 5%; }
  .float-badge-2 { left: 0; bottom: 10%; }

  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: 1fr; gap: 40px; }
  .tech-visual { max-width: 500px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .product-hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .prod-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .principle-grid { grid-template-columns: 1fr; gap: 32px; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }

  .gallery-grid-3 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
  }
  .img-placeholder-main { grid-row: auto; min-height: 300px; }
  .config-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .section { padding: 60px 0; }

  .hamburger { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: rgba(11,26,48,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav a { width: 100%; padding: 14px 18px; }
  .nav .btn { margin-left: 0; width: 100%; justify-content: center; margin-top: 8px; }

  .hero { min-height: auto; }
  .hero-content { padding: 40px 24px 60px; }
  .hero-title { font-size: clamp(2rem, 8vw, 2.6rem); }

  .apps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat-num { font-size: 2rem; }

  .tech-visual { grid-template-columns: 1fr; }
  .cert-grid { gap: 20px; }

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

  .prod-adv-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .inquiry-form { padding: 28px 20px; }

  .value-grid { grid-template-columns: 1fr; }
  .product-hero { padding-top: calc(var(--header-h) + 30px); }

  .faq-question { font-size: 0.95rem; padding: 16px 20px; }
  .faq-item.open .faq-answer { padding: 16px 20px; }

  .gallery-grid-3 { grid-template-columns: 1fr; grid-template-rows: auto; }
  .img-placeholder-main { grid-row: auto; min-height: 260px; }
  .config-grid { grid-template-columns: 1fr; }
  .version-table { font-size: 0.78rem; }
  .version-table th, .version-table td { padding: 10px 10px; }
  .version-table .feature-label { white-space: normal; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-features { gap: 8px; }
  .hero-feature { font-size: 0.78rem; padding: 6px 12px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .product-actions { flex-direction: column; }
  .logo-text { font-size: 1.1rem; }
}

/* ── Scroll-triggered Animations ── */
.anim-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.anim-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.anim-delay-1 { transition-delay: 0.1s; }
.anim-delay-2 { transition-delay: 0.2s; }
.anim-delay-3 { transition-delay: 0.3s; }
.anim-delay-4 { transition-delay: 0.4s; }