/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #fff;
  color: #1a1a1a;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; cursor: pointer; font-family: inherit; background: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
:root {
  --amber: #f59e0b;
  --amber-dark: #d97706;
  --amber-light: #fbbf24;
  --dark: #0a0a0a;
  --dark-2: #171717;
  --dark-3: #262626;
  --gray: #525252;
  --gray-light: #a3a3a3;
  --gray-lighter: #e5e5e5;
  --gray-bg: #f5f5f5;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: #888; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ===== Animations ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes ping { 0% { transform: scale(1); opacity: 1; } 75%, 100% { transform: scale(2); opacity: 0; } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.fade-in { animation: fadeIn 0.6s ease-out forwards; }
.fade-up { animation: fadeUp 0.6s ease-out forwards; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all 0.3s ease;
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.header.scrolled .header-inner { height: 72px; }

.logo { display: flex; align-items: center; gap: 8px; }
.logo-icon {
  width: 40px; height: 40px;
  background: #0a0a0a;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--amber);
}
.logo-icon svg { width: 24px; height: 24px; }
.logo-text { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; color: #fff; transition: color 0.3s; display: inline-flex; flex-direction: column; line-height: 1.1; gap: 2px; }
.logo-text b { font-weight: 800; }
.logo-text small { font-size: 11px; font-weight: 500; color: #a3a3a3; letter-spacing: 0.05em; }
.logo-accent { color: var(--amber); }
.header.scrolled .logo-text { color: #0a0a0a; }

.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  color: rgba(255,255,255,0.8);
  transition: all 0.2s;
}
.header.scrolled .nav-link { color: #404040; }
.nav-link:hover { background: rgba(255,255,255,0.1); color: #fff; }
.header.scrolled .nav-link:hover { background: #f5f5f5; color: #0a0a0a; }
.nav-link.active { color: var(--amber); background: rgba(255,255,255,0.1); }
.header.scrolled .nav-link.active { background: #fef3c7; }
.nav-cta {
  margin-left: 8px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  background: var(--amber);
  color: #fff !important;
  border-radius: 8px;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--amber-dark); }

/* Nav dropdown (mega menu) */
.nav-has-dropdown { position: relative; }
.nav-caret { font-size: 10px; opacity: 0.7; margin-left: 2px; }
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  margin-top: 8px;
  background: #161616;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 22px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 24px 60px rgba(0,0,0,0.55);
  z-index: 200;
}
.nav-has-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 28px;
}
.nav-col-title {
  display: block;
  color: var(--amber);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
  cursor: pointer;
}
.nav-col-title:hover { color: #fff; }
.nav-col-link {
  display: block;
  color: #d4d4d4;
  font-size: 13px;
  line-height: 1.5;
  padding: 5px 0;
  text-decoration: none;
  transition: color 0.15s;
  white-space: nowrap;
}
.nav-col-link:hover { color: #fff; }

/* Mobile nav sub-links */
.nav-sub-head {
  display: block;
  padding: 10px 16px 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--amber);
  text-decoration: none;
  cursor: pointer;
}
.nav-sub-head:hover { color: #0a0a0a; }
.nav-sub-link {
  display: block;
  padding: 7px 16px 7px 32px;
  font-size: 13px;
  color: #525252;
  text-decoration: none;
}
.nav-sub-link:hover { color: #0a0a0a; }

/* Smooth anchor scroll with fixed header offset */
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 84px; }

.mobile-toggle { display: none; color: #fff; }
.header.scrolled .mobile-toggle { color: #0a0a0a; }
.nav-mobile {
  display: none;
  flex-direction: column;
  background: #fff;
  border-top: 1px solid #f0f0f0;
  padding: 16px;
  gap: 4px;
}
.nav-mobile.open { display: flex; }
.nav-link-mobile {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  color: #404040;
}
.nav-link-mobile.active { color: var(--amber); background: #fef3c7; }

/* ===== Hero (Home) ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: #0a0a0a;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a0a0a, #171717, #0a0a0a);
}
.hero-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  filter: blur(120px);
}
.hero-waves {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.1;
}
.hero-waves svg { width: 100%; height: 100%; }
.hero-content {
  position: relative;
  z-index: 10;
  max-width: 768px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 999px;
  margin-bottom: 32px;
  animation: fadeIn 0.6s ease-out forwards;
}
.hero-badge-dot {
  width: 8px; height: 8px;
  background: var(--amber);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero-badge-text { color: var(--amber-light); font-size: 14px; font-weight: 500; }
.hero h1 {
  font-size: clamp(48px, 7vw, 72px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 24px;
  animation: fadeUp 0.6s ease-out 0.1s forwards;
  opacity: 0;
}
.hero h1 .accent { color: var(--amber); display: block; }
.hero p {
  font-size: clamp(16px, 2vw, 20px);
  color: #a3a3a3;
  max-width: 640px;
  margin-bottom: 40px;
  animation: fadeUp 0.6s ease-out 0.2s forwards;
  opacity: 0;
}
.hero p .highlight { color: var(--amber-light); }
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.6s ease-out 0.3s forwards;
  opacity: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  transition: all 0.2s;
  cursor: pointer;
}
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { background: var(--amber-dark); transform: translateY(-1px); }
.btn-outline { background: rgba(255,255,255,0.05); color: #fff; border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(4px); }
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.btn-dark { background: #0a0a0a; color: #fff; }
.btn-dark:hover { background: #262626; }
.btn svg { transition: transform 0.2s; }
.btn:hover svg { transform: translateX(4px); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
  animation: fadeUp 0.6s ease-out 0.4s forwards;
  opacity: 0;
}
.hero-stat-num { font-size: clamp(28px, 4vw, 36px); font-weight: 800; color: #fff; }
.hero-stat-label { font-size: 14px; color: #737373; margin-top: 4px; }

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: bounce 2s infinite;
}
.scroll-indicator span { font-size: 12px; color: #525252; }
.scroll-line { width: 1px; height: 32px; background: linear-gradient(to bottom, #525252, transparent); }

/* ===== Sections ===== */
.section { padding: 96px 0; }
.section-dark { background: #0a0a0a; color: #fff; }
.section-gray { background: #f5f5f5; }
.section-center { text-align: center; }
.section-eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--amber);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-desc { font-size: 16px; color: #737373; max-width: 640px; }
.section-dark .section-desc { color: #a3a3a3; }
.section-center .section-desc { margin: 0 auto; }
.section-center .section-title { margin-left: auto; margin-right: auto; }

/* ===== Brief Intro ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.intro-text h2 { font-size: 36px; font-weight: 800; line-height: 1.3; margin-bottom: 24px; }
.intro-text p { color: #525252; margin-bottom: 16px; line-height: 1.8; }
.intro-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: #0a0a0a;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 4px;
  margin-top: 16px;
  transition: gap 0.2s;
}
.intro-link:hover { gap: 12px; }
.intro-visual { position: relative; }
.intro-card {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #f5f5f5, #e5e5e5);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.intro-card svg { width: 75%; height: 75%; }
.intro-badge {
  position: absolute;
  bottom: -24px; left: -24px;
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  border: 1px solid #f0f0f0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.intro-badge-icon {
  width: 48px; height: 48px;
  background: #fef3c7;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.intro-badge-num { font-size: 24px; font-weight: 800; }
.intro-badge-label { font-size: 12px; color: #737373; }

/* ===== Product Cards ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: 24px;
  padding: 32px;
  border: 1px solid #f0f0f0;
  transition: all 0.3s;
  cursor: pointer;
}
.product-card:hover {
  border-color: #fde68a;
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}
.product-icon-box {
  width: 80px; height: 80px;
  background: #0a0a0a;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--amber);
  transition: all 0.3s;
}
.product-card:hover .product-icon-box { background: var(--amber); color: #fff; }
.product-icon-box svg { width: 48px; height: 48px; }
.product-icon-box.product-icon-img {
  width: 100%;
  height: 160px;
  border-radius: 16px;
  overflow: hidden;
  background: #f5f5f5;
}
.product-icon-box.product-icon-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.product-card:hover .product-icon-box.product-icon-img img { transform: scale(1.05); }
.product-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.product-card .en-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.product-card p { font-size: 14px; color: #525252; line-height: 1.7; margin-bottom: 16px; }
.product-card .more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s;
}
.product-card:hover .more { color: var(--amber); }

/* ===== Advantages (Dark) ===== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  padding: 32px;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.05);
  transition: all 0.3s;
}
.adv-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(245, 158, 11, 0.2);
}
.adv-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: rgba(245, 158, 11, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--amber);
  font-size: 24px;
  transition: all 0.3s;
}
.adv-card:hover .adv-icon { background: var(--amber); color: #fff; }
.adv-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.adv-card p { font-size: 14px; color: #a3a3a3; line-height: 1.7; }

/* ===== Application Scenes ===== */
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.scene-card {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background: #0a0a0a;
  padding: 32px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform 0.3s;
}
.scene-card:hover { transform: translateY(-4px); }
.scene-card.scene-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: var(--scene-bg, url('images/grille-texture.jpg'));
  background-size: cover;
  background-position: center;
  opacity: 0.9;
}
.scene-card.scene-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(10,10,10,0.20) 0%, rgba(10,10,10,0.50) 55%, rgba(10,10,10,0.78) 100%);
}
.scene-glow {
  position: absolute;
  top: 0; right: 0;
  width: 128px; height: 128px;
  background: rgba(245, 158, 11, 0.05);
  border-radius: 50%;
  filter: blur(40px);
  transition: background 0.3s;
  z-index: 2;
}
.scene-card:hover .scene-glow { background: rgba(245, 158, 11, 0.1); }
.scene-card h3 { position: relative; z-index: 2; font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.scene-card p { position: relative; z-index: 2; font-size: 14px; color: #a3a3a3; }

/* ===== Model Cards (category sub-pages) ===== */
.model-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.model-card {
  position: relative; overflow: hidden; border-radius: 20px;
  background: #0a0a0a; display: flex; flex-direction: column; justify-content: flex-end;
  min-height: 220px; padding: 28px; text-decoration: none;
  transition: transform 0.3s;
}
.model-card:hover { transform: translateY(-4px); }
.model-card .model-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center; opacity: 0.35;
  transition: opacity 0.3s, transform 0.5s;
}
.model-card:hover .model-bg { opacity: 0.5; transform: scale(1.04); }
.model-card::after {
  content: ''; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(10,10,10,0.15) 0%, rgba(10,10,10,0.35) 55%, rgba(10,10,10,0.85) 100%);
}
.model-card .model-badge {
  position: absolute; top: 16px; left: 16px; z-index: 3;
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  background: rgba(245, 158, 11, 0.92); color: #111; padding: 4px 10px; border-radius: 999px;
}
.model-card .model-arrow {
  position: absolute; top: 16px; right: 16px; z-index: 3;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.1); color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 15px; transition: background 0.3s, transform 0.3s;
}
.model-card:hover .model-arrow { background: rgba(245, 158, 11, 0.9); color: #111; transform: translateX(2px); }
.model-card h3 { position: relative; z-index: 2; font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.model-card p { position: relative; z-index: 2; font-size: 13px; color: #a3a3a3; }

/* ===== Breadcrumb ===== */
.breadcrumb { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: #a3a3a3; margin-bottom: 20px; }
.breadcrumb a { color: #a3a3a3; text-decoration: none; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--amber); }
.breadcrumb .sep { color: #525252; }
.breadcrumb .current { color: var(--amber); font-weight: 600; }

/* ===== Model Detail ===== */
.model-detail-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.model-detail-head .model-detail-id {
  font-size: 13px; font-weight: 700; letter-spacing: 0.05em;
  background: rgba(245, 158, 11, 0.15); color: var(--amber);
  padding: 6px 14px; border-radius: 999px;
}
.model-detail-desc { font-size: 16px; color: #737373; line-height: 1.8; max-width: 640px; margin-bottom: 32px; }
.model-nav { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }

/* ===== CTA Section ===== */
.cta-section {
  padding: 96px 0;
  background: linear-gradient(to right, #0a0a0a, #171717);
  text-align: center;
}
.cta-section h2 { font-size: clamp(32px, 5vw, 48px); font-weight: 800; color: #fff; margin-bottom: 24px; }
.cta-section h2 .accent { color: var(--amber); }
.cta-section p { font-size: 18px; color: #a3a3a3; max-width: 640px; margin: 0 auto 40px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 128px 0 80px;
  background: #0a0a0a;
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a0a0a, #171717, #0a0a0a);
}
.page-hero-glow {
  position: absolute;
  width: 500px; height: 500px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  filter: blur(120px);
}
.page-hero-content { position: relative; z-index: 1; max-width: 768px; }
.page-hero h1 {
  font-size: clamp(40px, 6vw, 60px);
  font-weight: 800;
  line-height: 1.15;
  margin: 16px 0 24px;
}
.page-hero h1 .accent { color: var(--amber); }
.page-hero p { font-size: 18px; color: #a3a3a3; line-height: 1.7; max-width: 640px; }
.page-hero-year {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin: -8px 0 28px;
  font-family: 'Inter', sans-serif;
}
.page-hero-year .label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: #ef4444;
  text-transform: uppercase;
}
.page-hero-year .num {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ef4444;
  line-height: 1;
}
.page-hero-year .line {
  flex: 0 0 48px;
  height: 2px;
  background: #ef4444;
  margin-left: 4px;
  align-self: center;
  opacity: 0.6;
}

/* ===== About Page ===== */
.about-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-story-text h2 { font-size: 36px; font-weight: 800; line-height: 1.3; margin-bottom: 24px; }
.about-story-text p { color: #525252; margin-bottom: 16px; line-height: 1.8; }
.about-story-text .emphasis { color: var(--amber); font-weight: 600; }

.about-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-stat-card {
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.about-stat-card.dark { background: linear-gradient(135deg, #0a0a0a, #404040); aspect-ratio: 3/4; }
.about-stat-card.amber { background: linear-gradient(135deg, var(--amber), var(--amber-dark)); aspect-ratio: 3/4; color: #fff; }
.about-stat-card.light { background: #f5f5f5; aspect-ratio: 3/2; }
.about-stat-card.amber-light { background: #fef3c7; aspect-ratio: 3/2; }
.about-stat-num { font-size: 36px; font-weight: 800; }
.about-stat-label { font-size: 14px; color: #737373; margin-top: 4px; }
.about-stat-card.dark .about-stat-label { color: #a3a3a3; }
.about-stat-card.amber .about-stat-label { color: rgba(255,255,255,0.8); }
.about-stat-card.dark svg { width: 60%; height: auto; margin: auto; }
.about-stat-card.about-stat-photo { padding: 0; overflow: hidden; }
.about-stat-card.about-stat-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Mission/Vision/Values */
.mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.mvv-card {
  background: #fff;
  border-radius: 20px;
  padding: 32px;
  border: 1px solid #f0f0f0;
  transition: box-shadow 0.3s;
}
.mvv-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); }
.mvv-icon {
  width: 56px; height: 56px;
  background: #fef3c7;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
}
.mvv-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 4px; }
.mvv-subtitle { font-size: 12px; color: var(--amber); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }
.mvv-card p { color: #525252; line-height: 1.8; }

/* Timeline */
.timeline { position: relative; }
.timeline-line {
  position: absolute;
  left: 16px;
  top: 0; bottom: 0;
  width: 1px;
  background: #e5e5e5;
}
.timeline-item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 48px;
}
.timeline-dot {
  position: absolute;
  left: 10px;
  top: 8px;
  width: 16px; height: 16px;
  background: var(--amber);
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.timeline-card {
  display: inline-block;
  background: #fff;
  padding: 24px;
  border-radius: 16px;
  border: 1px solid #f0f0f0;
  transition: box-shadow 0.3s;
}
.timeline-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); }
.timeline-year { font-size: 28px; font-weight: 800; color: var(--amber); margin-bottom: 8px; }
.timeline-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.timeline-desc { font-size: 14px; color: #525252; }

/* Certifications */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 20px;
  padding: 32px;
  text-align: center;
  transition: background 0.3s;
}
.cert-card:hover { background: rgba(255,255,255,0.1); }
.cert-icon {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.cert-name { font-size: 18px; font-weight: 700; color: #fff; }
.cert-desc { font-size: 14px; color: #a3a3a3; margin-top: 4px; }

/* ===== Products Page ===== */
.product-tabs {
  position: sticky;
  top: 64px;
  z-index: 40;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #f0f0f0;
}
.product-tabs-inner {
  display: flex;
  gap: 4px;
  padding: 12px 0;
  overflow-x: auto;
}
.product-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: #525252;
  white-space: nowrap;
  transition: all 0.2s;
  cursor: pointer;
}
.product-tab:hover { background: #f5f5f5; }
.product-tab.active { background: #0a0a0a; color: #fff; }
.product-tab svg { width: 20px; height: 20px; }

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.product-visual {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #0a0a0a, #262626);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-visual::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 256px; height: 256px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  filter: blur(80px);
}
.product-visual-inner { position: relative; z-index: 1; text-align: center; padding: 48px; }
.product-visual-icon { color: var(--amber); margin-bottom: 32px; display: flex; justify-content: center; }
.product-visual-icon svg { width: 128px; height: 128px; }
.product-visual h2 { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.product-visual .en { font-size: 14px; color: var(--amber); text-transform: uppercase; letter-spacing: 0.05em; }

.product-info-eyebrow { font-size: 14px; font-weight: 600; color: var(--amber); text-transform: uppercase; letter-spacing: 0.05em; }
.product-info h2 { font-size: 36px; font-weight: 800; margin: 12px 0 24px; }
.product-info > p { font-size: 18px; color: #525252; line-height: 1.8; margin-bottom: 32px; }
.product-section-label { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }

.feature-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.feature-item { display: flex; align-items: flex-start; gap: 12px; }
.feature-check {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fef3c7;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 10px;
  color: var(--amber);
}

.specs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 32px; }
.spec-item { background: #f5f5f5; border-radius: 12px; padding: 16px; border: 1px solid #f0f0f0; }
.spec-label { font-size: 12px; color: #737373; margin-bottom: 4px; }
.spec-value { font-size: 14px; font-weight: 700; }

/* Signal Chain */
.signal-chain {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.chain-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 20px;
  padding: 32px;
  text-align: center;
  transition: background 0.3s;
  position: relative;
}
.chain-item:hover { background: rgba(255,255,255,0.1); }
.chain-step { font-size: 12px; color: rgba(245, 158, 11, 0.6); margin-bottom: 8px; }
.chain-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  font-size: 28px;
}
.chain-item h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.chain-item p { font-size: 14px; color: #a3a3a3; }
.chain-arrow {
  position: absolute;
  top: 50%;
  right: -12px;
  transform: translateY(-50%);
  width: 24px; height: 24px;
  background: #262626;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  font-size: 12px;
  z-index: 1;
}

/* ===== Contact Page ===== */
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.contact-card {
  background: #fff;
  border-radius: 20px;
  padding: 32px;
  border: 1px solid #f0f0f0;
  transition: all 0.3s;
}
.contact-card:hover { border-color: #fde68a; box-shadow: 0 8px 32px rgba(0,0,0,0.06); }
.contact-icon {
  width: 48px; height: 48px;
  background: #fef3c7;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 24px;
}
.contact-card h3 { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.contact-card .value { font-weight: 600; word-break: break-word; margin-bottom: 4px; }
.contact-card .desc { font-size: 12px; color: #737373; }

.contact-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.form-card {
  background: #fff;
  border-radius: 24px;
  padding: 40px;
  border: 1px solid #f0f0f0;
}
.form-card h2 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.form-card > p { color: #737373; margin-bottom: 32px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.form-required { color: var(--amber); }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #e5e5e5;
  border-radius: 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}
.form-textarea { resize: none; }
.form-submit {
  width: 100%;
  padding: 16px;
  background: #0a0a0a;
  color: #fff;
  font-weight: 600;
  border-radius: 12px;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s;
}
.form-submit:hover { background: #262626; }
.form-note { font-size: 12px; color: #a3a3a3; text-align: center; margin-top: 12px; }
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 0;
  text-align: center;
}
.form-success-icon {
  width: 64px; height: 64px;
  background: #dcfce7;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 16px;
}
.form-success h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.form-success p { color: #737373; }

.contact-side { display: flex; flex-direction: column; gap: 24px; }
.contact-map {
  flex: 1;
  background: linear-gradient(135deg, #0a0a0a, #262626);
  border-radius: 24px;
  padding: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
  min-height: 300px;
  display: flex;
  flex-direction: column;
}
.contact-map-grid {
  position: absolute;
  inset: 0;
  opacity: 0.1;
}
.contact-map-content { position: relative; z-index: 1; display: flex; flex-direction: column; flex: 1; }
.contact-map-pin {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.contact-map-pin-circle {
  position: relative;
  width: 64px; height: 64px;
}
.contact-map-pin-ping {
  position: absolute;
  inset: 0;
  background: rgba(245, 158, 11, 0.2);
  border-radius: 50%;
  animation: ping 2s infinite;
}
.contact-map-pin-dot {
  position: relative;
  width: 64px; height: 64px;
  background: var(--amber);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.contact-urgent {
  background: var(--amber);
  border-radius: 24px;
  padding: 32px;
  color: #fff;
}
.contact-urgent h3 { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.contact-urgent p { font-size: 14px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 16px; }
.contact-urgent-phone { display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 700; }

/* Cities Grid */
.cities-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.city-item {
  text-align: center;
  padding: 16px 8px;
  background: #f5f5f5;
  border-radius: 12px;
  border: 1px solid #f0f0f0;
  font-size: 14px;
  font-weight: 500;
  color: #404040;
  transition: all 0.2s;
}
.city-item:hover { border-color: #fde68a; background: rgba(254, 243, 199, 0.4); }

/* ===== Footer ===== */
.footer { background: #0a0a0a; color: #a3a3a3; padding: 64px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.footer-logo span { font-size: 18px; font-weight: 800; color: #fff; }
.footer-desc { font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.footer-slogan { font-size: 14px; color: rgba(245, 158, 11, 0.8); font-style: italic; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--amber); }
.footer-col ul li .footer-icon { margin-right: 8px; }
.footer-bottom {
  padding: 24px 0;
  border-top: 1px solid #262626;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom p { font-size: 12px; color: #737373; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 12px; transition: color 0.2s; }
.footer-links a:hover { color: var(--amber); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .products-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .scenes-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .signal-chain { grid-template-columns: repeat(2, 1fr); }
  .chain-arrow { display: none; }
  .cities-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .mobile-toggle { display: flex; align-items: center; justify-content: center; }
  .intro-grid, .about-story-grid, .product-detail-grid, .contact-form-grid { grid-template-columns: 1fr; gap: 32px; }
  .mvv-grid { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .section { padding: 64px 0; }
  .products-grid, .adv-grid, .scenes-grid, .cert-grid, .contact-cards { grid-template-columns: 1fr; }
  .signal-chain { grid-template-columns: 1fr; }
  .cities-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .product-tabs { top: 64px; }
  .about-stats-grid { grid-template-columns: 1fr 1fr; }
  .timeline-item { padding-left: 40px; }
}

/* ===== Language Switch ===== */
.header-lang { display: flex; align-items: center; margin-left: 8px; }
.lang-switch {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 6px 14px; font-size: 13px; font-weight: 700; letter-spacing: 0.02em;
  color: rgba(255,255,255,0.85); border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px; transition: all 0.2s;
}
.lang-switch:hover { color: #fff; border-color: var(--amber); }
.header.scrolled .lang-switch { color: #404040; border-color: #d4d4d4; }
.header.scrolled .lang-switch:hover { color: #0a0a0a; border-color: var(--amber); }
.lang-switch-mobile { text-align: center; font-weight: 700; justify-content: center; }
.lang-switch-mobile:hover { color: var(--amber); }

@media (max-width: 768px) {
  .header-lang { display: none; }
}