/* ============================================
   CSS RESET & BASE
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  color: #2D2D2D;
  background: #FDFBF7;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 120px 0; }
.section-padding-dark { padding: 120px 0; background: #1B1B3A; color: #FFFFFF; }

.section-header { text-align: center; margin-bottom: 64px; }
.section-header .en-subtitle {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  color: #C9A96E;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-header .cn-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 600;
  font-size: 36px;
  color: #2D2D2D;
  margin-bottom: 24px;
}
.section-header-dark .cn-title { color: #FFFFFF; }
.gold-divider {
  width: 60px;
  height: 2px;
  background: #C9A96E;
  margin: 0 auto;
}

.gold-divider-wide {
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, #C9A96E, transparent);
  margin: 60px auto;
}

.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
   1. NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 72px;
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
}
.navbar.scrolled {
  background: rgba(27, 27, 58, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  cursor: pointer;
}
.nav-logo .logo-main {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 24px;
  color: #C9A96E;
  letter-spacing: 2px;
  transition: transform 0.3s ease;
}
.nav-logo:hover .logo-main {
  transform: scale(1.05);
}
.nav-logo .logo-sub {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  letter-spacing: 3px;
  color: rgba(201,169,110,0.8);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  transition: color 0.3s;
  letter-spacing: 1px;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 1px;
  background: #C9A96E;
  transition: transform 0.3s ease;
}
.nav-links a:hover { color: #C9A96E; }
.nav-links a:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}
.lang-toggle {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 1px;
  cursor: pointer;
  transition: color 0.3s;
}
.lang-toggle:hover { color: #C9A96E; }
.lang-toggle span { color: #C9A96E; }
.nav-cta {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  padding: 8px 24px;
  background: #C9A96E;
  color: #1B1B3A;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
}
.nav-cta:hover { background: #D4B87A; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(201,169,110,0.3); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: #C9A96E;
  transition: all 0.3s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.mobile-nav {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(27,27,58,0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.mobile-nav.active { display: flex; opacity: 1; }
.mobile-nav a {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 20px;
  color: #FFFFFF;
  letter-spacing: 2px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
}
.mobile-nav.active a {
  opacity: 1;
  transform: translateY(0);
}
.mobile-nav.active a:nth-child(1) { transition-delay: 0.1s; }
.mobile-nav.active a:nth-child(2) { transition-delay: 0.15s; }
.mobile-nav.active a:nth-child(3) { transition-delay: 0.2s; }
.mobile-nav.active a:nth-child(4) { transition-delay: 0.25s; }
.mobile-nav.active a:nth-child(5) { transition-delay: 0.3s; }
.mobile-nav.active a:nth-child(6) { transition-delay: 0.35s; }
.mobile-nav a:hover { color: #C9A96E; }

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

/* ============================================
   2. HERO SECTION
   ============================================ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url('../assets/hero-background.jpg') center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27,27,58,0.5) 0%, rgba(27,27,58,0.7) 100%);
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, rgba(27,27,58,0.4) 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}
.hero-brand {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 56px;
  color: #C9A96E;
  letter-spacing: 6px;
  margin-bottom: 8px;
  animation: heroFadeInDown 1.2s ease forwards;
  opacity: 0;
}
.hero-since {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  letter-spacing: 6px;
  color: rgba(201,169,110,0.7);
  text-transform: uppercase;
  margin-bottom: 32px;
  animation: heroFadeInDown 1.2s ease 0.2s forwards;
  opacity: 0;
}
.hero-slogan {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 28px;
  color: #C9A96E;
  margin-bottom: 16px;
  line-height: 1.4;
  animation: heroFadeInUp 1.2s ease 0.4s forwards;
  opacity: 0;
}
.hero-cn-slogan {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 24px;
  color: rgba(255,255,255,0.9);
  font-weight: 300;
  margin-bottom: 48px;
  letter-spacing: 4px;
  animation: heroFadeInUp 1.2s ease 0.6s forwards;
  opacity: 0;
}
.hero-cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: heroFadeInUp 1.2s ease 0.8s forwards;
  opacity: 0;
}
.btn-gold {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  padding: 14px 36px;
  background: #C9A96E;
  color: #1B1B3A;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  display: inline-block;
}
.btn-gold:hover { background: #D4B87A; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,169,110,0.3); }
.btn-outline {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  padding: 14px 36px;
  background: transparent;
  color: #FFFFFF;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 4px;
  cursor: pointer;
  font-weight: 400;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  display: inline-block;
}
.btn-outline:hover { border-color: #C9A96E; color: #C9A96E; transform: translateY(-2px); }
.hero-cities {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 4px;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  animation: heroFadeIn 1.2s ease 1s forwards;
  opacity: 0;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: heroFadeIn 1.2s ease 1.2s forwards;
  opacity: 0;
}
.hero-scroll-indicator span {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
}
.scroll-mouse {
  width: 24px;
  height: 40px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  position: relative;
}
.scroll-mouse::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: #C9A96E;
  border-radius: 2px;
  animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes heroFadeInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroFadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scrollWheel {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

@media (max-width: 768px) {
  .hero-brand { font-size: 32px; letter-spacing: 3px; }
  .hero-slogan { font-size: 20px; }
  .hero-cn-slogan { font-size: 18px; letter-spacing: 2px; }
  .hero-cta-group { flex-direction: column; align-items: center; }
  .hero-scroll-indicator { bottom: 60px; }
}

/* ============================================
   3. ABOUT SECTION
   ============================================ */
.about-section { background: #FDFBF7; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-left .en-subtitle {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  color: #C9A96E;
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.about-left .cn-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 600;
  font-size: 36px;
  color: #2D2D2D;
  margin-bottom: 24px;
}
.about-left .gold-line {
  width: 60px;
  height: 2px;
  background: #C9A96E;
}
.about-right p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  line-height: 1.9;
  color: #2D2D2D;
  margin-bottom: 20px;
}
.about-right p span.highlight {
  color: #C9A96E;
  font-weight: 500;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-left .cn-title { font-size: 28px; }
}

/* ============================================
   4. BUSINESS PORTFOLIO
   ============================================ */
.portfolio-section { background: #FDFBF7; }
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.portfolio-card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: 0 4px 24px rgba(27,27,58,0.04);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  border: 1px solid rgba(27,27,58,0.04);
  cursor: default;
}
.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(27,27,58,0.08);
  border-color: rgba(201,169,110,0.2);
}
.portfolio-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #C9A96E22, #C9A96E11);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
  transition: transform 0.3s ease;
}
.portfolio-card:hover .card-icon {
  transform: scale(1.1);
}
.portfolio-card h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 8px;
}
.portfolio-card .card-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: #C9A96E;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.portfolio-card p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  color: #8B8B8B;
  line-height: 1.7;
}
.data-badges {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.data-badge {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 20px 32px;
  box-shadow: 0 2px 16px rgba(27,27,58,0.04);
  text-align: center;
  border: 1px solid rgba(201,169,110,0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.data-badge:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(27,27,58,0.06);
}
.data-badge .number {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 700;
  color: #C9A96E;
  display: inline-block;
}
.data-badge .label {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  margin-top: 4px;
}

@media (max-width: 1024px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .portfolio-grid { grid-template-columns: 1fr; }
  .data-badges { flex-direction: column; align-items: center; }
}

/* ============================================
   5. TIMELINE
   ============================================ */
.timeline-section { background: #FDFBF7; }
.timeline-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}
.timeline-track {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.timeline-track::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 0; right: 0;
  height: 2px;
  background: rgba(201,169,110,0.2);
}
.timeline-progress {
  position: absolute;
  top: 24px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, #C9A96E, #D4B87A);
  width: 0;
  transition: width 1.5s ease;
}
.timeline-node {
  position: relative;
  z-index: 2;
  flex: 1;
  text-align: center;
  padding: 0 12px;
}
.timeline-node .dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #C9A96E;
  margin: 16px auto;
  box-shadow: 0 0 0 6px rgba(201,169,110,0.15);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.timeline-node:hover .dot {
  box-shadow: 0 0 0 10px rgba(201,169,110,0.15);
  transform: scale(1.2);
}
.timeline-node .year {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 700;
  color: #C9A96E;
}
.timeline-node .node-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #2D2D2D;
  margin-top: 8px;
}
.timeline-node .node-desc {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  margin-top: 4px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .timeline-track { flex-direction: column; gap: 24px; }
  .timeline-track::before {
    top: 0; bottom: 0;
    left: 24px;
    width: 2px;
    height: 100%;
  }
  .timeline-progress {
    top: 0; left: 24px;
    width: 2px;
    height: 0;
    background: linear-gradient(180deg, #C9A96E, #D4B87A);
    transition: height 1.5s ease;
  }
  .timeline-node { text-align: left; padding-left: 56px; }
  .timeline-node .dot { position: absolute; left: 16px; top: 4px; margin: 0; }
}

/* ============================================
   6. VISION & STRATEGY
   ============================================ */
.vision-section { background: #1B1B3A; color: #FFFFFF; position: relative; overflow: hidden; }
.vision-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(201,169,110,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.vision-main-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 36px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.vision-en-title {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 18px;
  color: #C9A96E;
  text-align: center;
  margin-bottom: 64px;
  position: relative;
  z-index: 1;
}
.vision-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}
.vision-col {
  text-align: center;
  padding: 32px 16px;
  border-radius: 12px;
  transition: background 0.3s ease, transform 0.3s ease;
}
.vision-col:hover {
  background: rgba(255,255,255,0.03);
  transform: translateY(-4px);
}
.vision-col .col-number {
  font-family: 'Playfair Display', serif;
  font-size: 40px;
  font-weight: 700;
  color: #C9A96E;
}
.vision-col .col-label {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  margin-top: 8px;
}
.vision-col .col-desc {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .vision-columns { grid-template-columns: repeat(2, 1fr); }
  .vision-main-title { font-size: 28px; }
}

/* ============================================
   7. SHEVY LARNE BRAND
   ============================================ */
.brand-section {
  position: relative;
  overflow: hidden;
  background: #FDFBF7;
}
.brand-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.brand-image {
  width: 100%;
  aspect-ratio: 3/4;
  background: url('../assets/brand-shevy-larne.jpg') center/cover no-repeat;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(27,27,58,0.15);
  transition: transform 0.6s ease;
}
.brand-image:hover {
  transform: scale(1.02);
}
.brand-name {
  font-family: 'Playfair Display', serif;
  font-size: 48px;
  font-weight: 700;
  color: #1B1B3A;
  margin-bottom: 4px;
}
.brand-name-cn {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 28px;
  font-weight: 300;
  color: #2D2D2D;
  margin-bottom: 24px;
  letter-spacing: 4px;
}
.brand-tagline {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 16px;
  color: #8B8B8B;
  line-height: 2;
  margin-bottom: 40px;
  letter-spacing: 1px;
}
.brand-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.breakdown-item {
  padding: 20px;
  border-left: 2px solid #C9A96E;
  background: #FFFFFF;
  border-radius: 0 8px 8px 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.breakdown-item:hover {
  transform: translateX(4px);
  box-shadow: -4px 0 20px rgba(201,169,110,0.1);
}
.breakdown-item .char {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: #C9A96E;
}
.breakdown-item .char-en {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 12px;
  color: #C9A96E;
  margin-bottom: 4px;
  letter-spacing: 1px;
}
.breakdown-item .char-meaning {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .brand-grid { grid-template-columns: 1fr; gap: 40px; }
  .brand-image { aspect-ratio: 4/3; }
  .brand-name { font-size: 32px; }
  .brand-name-cn { font-size: 22px; }
  .brand-breakdown { grid-template-columns: 1fr; }
}

/* ============================================
   8. CORE TECHNOLOGY & PRODUCTS
   ============================================ */
.tech-section { background: #FDFBF7; }

.pdrn-section {
  padding: 120px 0;
}
.pdrn-header { text-align: center; margin-bottom: 48px; }
.pdrn-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 32px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 8px;
}
.pdrn-subtitle {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 16px;
  color: #C9A96E;
  margin-bottom: 24px;
}
.pdrn-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.pdrn-tag {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 3px;
  color: #C9A96E;
  padding: 8px 20px;
  border: 1px solid rgba(201,169,110,0.3);
  border-radius: 4px;
  text-transform: uppercase;
  transition: all 0.3s ease;
}
.pdrn-tag:hover {
  background: rgba(201,169,110,0.1);
  border-color: #C9A96E;
}
.pdrn-text {
  max-width: 800px;
  margin: 0 auto;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  color: #8B8B8B;
  text-align: center;
  line-height: 1.9;
}

.flagship-section {
  padding: 120px 0;
  background: #FFFFFF;
}
.flagship-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.flagship-image {
  width: 100%;
  aspect-ratio: 3/4;
  background: url('../assets/product-pdrn-patch.jpg') center/cover no-repeat;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(27,27,58,0.12);
  transition: transform 0.6s ease;
}
.flagship-image:hover {
  transform: scale(1.02);
}
.flagship-label {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 3px;
  color: #C9A96E;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.flagship-name {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 32px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 12px;
}
.flagship-tech {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: #A8D4E6;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.flagship-keywords {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.flagship-keyword {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  letter-spacing: 2px;
  color: #C9A96E;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(201,169,110,0.3);
}
.flagship-desc {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  color: #8B8B8B;
  line-height: 1.8;
}

@media (max-width: 768px) {
  .flagship-grid { grid-template-columns: 1fr; gap: 40px; }
  .flagship-image { aspect-ratio: 4/3; }
}

.mask-section { padding: 120px 0; background: #FDFBF7; }
.mask-collection-img {
  width: 100%;
  height: 320px;
  background: url('../assets/product-face-masks.jpg') center/cover no-repeat;
  border-radius: 16px;
  margin-bottom: 48px;
  box-shadow: 0 8px 32px rgba(27,27,58,0.08);
}
.mask-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.mask-card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(27,27,58,0.04);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  border: 1px solid rgba(27,27,58,0.04);
}
.mask-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(27,27,58,0.08);
  border-color: rgba(201,169,110,0.2);
}
.mask-card .mask-flower {
  font-size: 32px;
  margin-bottom: 16px;
  transition: transform 0.3s ease;
}
.mask-card:hover .mask-flower {
  transform: scale(1.15);
}
.mask-card .mask-cn-name {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 4px;
}
.mask-card .mask-en-name {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: #C9A96E;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.mask-card .mask-effect {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
}

@media (max-width: 768px) {
  .mask-grid { grid-template-columns: 1fr; }
  .mask-collection-img { height: 200px; }
}

/* ============================================
   9. R&D NETWORK
   ============================================ */
.rd-section {
  position: relative;
  overflow: hidden;
  background: #1B1B3A;
  color: #FFFFFF;
}
.rd-bg {
  position: absolute;
  inset: 0;
  background: url('../assets/rd-network.jpg') center/cover no-repeat;
  opacity: 0.12;
}
.rd-content { position: relative; z-index: 2; }
.rd-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
}
.rd-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(201,169,110,0.15);
  border-radius: 12px;
  padding: 40px 32px;
  transition: transform 0.4s, border-color 0.4s, background 0.4s;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.rd-card:hover {
  transform: translateY(-6px);
  border-color: rgba(201,169,110,0.4);
  background: rgba(255,255,255,0.08);
}
.rd-card .rd-icon {
  font-size: 28px;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}
.rd-card:hover .rd-icon {
  transform: scale(1.1);
}
.rd-card h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}
.rd-card .rd-en {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: #C9A96E;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.rd-card p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}
.rd-data {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}
.rd-data-item {
  text-align: center;
  padding: 20px 32px;
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(201,169,110,0.15);
  transition: transform 0.3s ease;
}
.rd-data-item:hover {
  transform: translateY(-3px);
}
.rd-data-item .rd-num {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 700;
  color: #C9A96E;
}
.rd-data-item .rd-label {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}

@media (max-width: 768px) {
  .rd-grid { grid-template-columns: 1fr; }
}

/* ============================================
   10. SCIENTIST TEAM
   ============================================ */
.scientist-section { background: #FDFBF7; }
.scientist-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scientist-card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 40px 24px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(27,27,58,0.04);
  transition: transform 0.4s, box-shadow 0.4s;
  border: 1px solid rgba(27,27,58,0.04);
}
.scientist-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(27,27,58,0.1);
}
.scientist-card .avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #C9A96E, #A8864A);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-family: 'Playfair Display', serif;
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.scientist-card:hover .avatar {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(201,169,110,0.3);
}
.scientist-card .sci-name {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 4px;
}
.scientist-card .sci-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #C9A96E;
  margin-bottom: 12px;
}
.scientist-card .sci-achievement {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 12px;
  color: #8B8B8B;
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .scientist-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .scientist-grid { grid-template-columns: 1fr; }
}

/* ============================================
   11. MANUFACTURING & QUALITY
   ============================================ */
.manufacturing-section { background: #FFFFFF; }
.mfg-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.mfg-card {
  background: #FDFBF7;
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  border: 1px solid rgba(201,169,110,0.1);
  transition: transform 0.4s, box-shadow 0.4s;
}
.mfg-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(27,27,58,0.06);
}
.mfg-card .mfg-icon {
  font-size: 32px;
  margin-bottom: 16px;
  transition: transform 0.3s ease;
}
.mfg-card:hover .mfg-icon {
  transform: scale(1.1);
}
.mfg-card h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 8px;
}
.mfg-card p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  line-height: 1.6;
}
.mfg-data {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}
.mfg-data-item {
  text-align: center;
  padding: 20px 32px;
  background: #FDFBF7;
  border-radius: 12px;
  border: 1px solid rgba(201,169,110,0.15);
  transition: transform 0.3s ease;
}
.mfg-data-item:hover {
  transform: translateY(-3px);
}
.mfg-data-item .mfg-num {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 700;
  color: #C9A96E;
}
.mfg-data-item .mfg-label {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  margin-top: 4px;
}

@media (max-width: 1024px) {
  .mfg-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .mfg-grid { grid-template-columns: 1fr; }
}

/* ============================================
   12. RECOGNITION & HONORS
   ============================================ */
.honors-section { background: #FDFBF7; }
.honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.honor-card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(27,27,58,0.04);
  transition: transform 0.4s, box-shadow 0.4s;
  border: 1px solid rgba(27,27,58,0.04);
  border-top: 3px solid #C9A96E;
}
.honor-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(27,27,58,0.08);
}
.honor-card .honor-icon {
  font-size: 36px;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}
.honor-card:hover .honor-icon {
  transform: scale(1.1);
}
.honor-card h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 8px;
}
.honor-card .honor-desc {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  color: #C9A96E;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .honors-grid { grid-template-columns: 1fr; }
}

/* ============================================
   13. INTERNATIONAL VISION
   ============================================ */
.intl-section { background: #1B1B3A; color: #FFFFFF; position: relative; }
.intl-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
}
.intl-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(201,169,110,0.15);
  border-radius: 12px;
  padding: 40px 24px;
  text-align: center;
  transition: transform 0.4s, border-color 0.4s, background 0.4s;
}
.intl-card:hover {
  transform: translateY(-6px);
  border-color: rgba(201,169,110,0.4);
  background: rgba(255,255,255,0.06);
}
.intl-card .intl-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(201,169,110,0.3), rgba(201,169,110,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 700;
  color: #C9A96E;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.intl-card:hover .intl-avatar {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(201,169,110,0.2);
}
.intl-card .intl-name {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 4px;
}
.intl-card .intl-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}

@media (max-width: 768px) {
  .intl-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   14. FOUNDER SECTION
   ============================================ */
.founder-section { background: #FDFBF7; }
.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}
.founder-image {
  width: 100%;
  aspect-ratio: 3/4;
  background: url('../assets/founder-portrait.jpg') center/cover no-repeat;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(27,27,58,0.15);
  transition: transform 0.6s ease;
}
.founder-image:hover {
  transform: scale(1.02);
}
.founder-name {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 28px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 4px;
}
.founder-role {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: #C9A96E;
  letter-spacing: 1px;
  margin-bottom: 32px;
}
.founder-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.founder-col h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #2D2D2D;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #C9A96E;
  display: inline-block;
}
.founder-col p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: #8B8B8B;
  line-height: 1.8;
}

@media (max-width: 1024px) {
  .founder-grid { grid-template-columns: 1fr; gap: 40px; }
  .founder-image { max-width: 400px; }
  .founder-columns { grid-template-columns: 1fr; }
}

/* ============================================
   15. FUTURE VISION
   ============================================ */
.future-section {
  position: relative;
  padding: 160px 0;
  background: #1B1B3A;
  color: #FFFFFF;
  text-align: center;
  overflow: hidden;
}
.future-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(201,169,110,0.08) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.7; }
}
.future-title {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 48px;
  font-weight: 300;
  letter-spacing: 12px;
  margin-bottom: 16px;
  position: relative;
}
.future-title span {
  color: #C9A96E;
  font-weight: 600;
}
.future-subtitle {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 18px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 4px;
  margin-bottom: 32px;
  position: relative;
}
.future-desc {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  color: rgba(255,255,255,0.45);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
  position: relative;
}

@media (max-width: 768px) {
  .future-title { font-size: 32px; letter-spacing: 6px; }
}

/* ============================================
   16. FOOTER
   ============================================ */
.footer {
  background: #1B1B3A;
  color: rgba(255,255,255,0.7);
  padding: 80px 0 32px;
  border-top: 1px solid rgba(201,169,110,0.1);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}
.footer-brand .footer-logo {
  font-family: 'Playfair Display', serif;
  font-size: 24px;
  font-weight: 700;
  color: #C9A96E;
  letter-spacing: 2px;
  margin-bottom: 4px;
}
.footer-brand .footer-logo-sub {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  color: rgba(201,169,110,0.6);
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.footer-brand p {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,0.5);
}
.footer-col h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col ul li a {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color 0.3s;
}
.footer-col ul li a:hover { color: #C9A96E; }
.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.footer-social .social-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(201,169,110,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #C9A96E;
  cursor: pointer;
  transition: all 0.3s ease;
}
.footer-social .social-circle:hover {
  background: rgba(201,169,110,0.15);
  border-color: #C9A96E;
  transform: translateY(-2px);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom .copyright {
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom .footer-slogan {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 12px;
  color: rgba(201,169,110,0.5);
}

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #C9A96E;
  color: #1B1B3A;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(201,169,110,0.4);
  font-size: 18px;
  border: none;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: #D4B87A;
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(201,169,110,0.5);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}

/* ============================================
   SECTION DARK HEADER VARIANTS
   ============================================ */
.section-header-dark .en-subtitle { color: #C9A96E; }
.section-header-dark .cn-title { color: #FFFFFF; }

/* ============================================
   RESPONSIVE: TABLET
   ============================================ */
@media (max-width: 1024px) and (min-width: 769px) {
  .container { padding: 0 20px; }
  .section-padding { padding: 80px 0; }
  .section-padding-dark { padding: 80px 0; }
  .section-header .cn-title { font-size: 30px; }
  .about-grid { gap: 60px; }
  .brand-grid { gap: 60px; }
  .flagship-grid { gap: 60px; }
  .founder-grid { gap: 60px; }
}

/* ============================================
   RESPONSIVE: LARGE MOBILE
   ============================================ */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section-padding { padding: 64px 0; }
  .section-padding-dark { padding: 64px 0; }
  .section-header { margin-bottom: 48px; }
  .section-header .cn-title { font-size: 26px; }
  .section-header .en-subtitle { font-size: 13px; }
  .gold-divider-wide { margin: 40px auto; }
  .hero { min-height: 600px; }
  .pdrn-section, .flagship-section, .mask-section { padding: 64px 0; }
  .future-section { padding: 100px 0; }
  .footer { padding: 60px 0 24px; }
  .footer-grid { margin-bottom: 40px; }
}

/* ============================================
   RESPONSIVE: SMALL MOBILE
   ============================================ */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section-padding { padding: 48px 0; }
  .section-padding-dark { padding: 48px 0; }
  .section-header { margin-bottom: 36px; }
  .section-header .cn-title { font-size: 22px; }
  .navbar { height: 60px; }
  .nav-logo .logo-main { font-size: 20px; }
  .hero { min-height: 560px; }
  .hero-brand { font-size: 26px; letter-spacing: 2px; }
  .hero-slogan { font-size: 18px; }
  .hero-cn-slogan { font-size: 16px; letter-spacing: 1px; }
  .btn-gold, .btn-outline { padding: 12px 28px; font-size: 13px; }
  .pdrn-title { font-size: 24px; }
  .flagship-name { font-size: 24px; }
  .brand-name { font-size: 28px; }
  .brand-name-cn { font-size: 18px; }
  .future-title { font-size: 26px; letter-spacing: 4px; }
  .future-subtitle { font-size: 14px; letter-spacing: 2px; }
  .pdrn-section, .flagship-section, .mask-section { padding: 48px 0; }
  .gold-divider-wide { margin: 32px auto; }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}