/* ===================================================
   HBH GLOBEST HOLDINGS — PREMIUM HEALTH BRAND
   Design System & Styles
   =================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600;700&family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --bg-primary: #0A0A0A;
  --bg-secondary: #111111;
  --bg-tertiary: #1A1A1A;
  --bg-card: #151515;
  --bg-card-hover: #1E1E1E;

  --accent-primary: #E8820C;
  --accent-secondary: #D4740A;
  --accent-glow: rgba(232, 130, 12, 0.15);
  --accent-glow-strong: rgba(232, 130, 12, 0.35);

  --gold: #C4A87C;
  --gold-light: #D4BC96;
  --champagne: #F0E6D3;

  --text-primary: #F5F0E8;
  --text-secondary: #B8B0A4;
  --text-muted: #7A7468;
  --text-dark: #0A0A0A;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(232, 130, 12, 0.25);

  --gradient-hero: linear-gradient(135deg, #0A0A0A 0%, #1A1410 50%, #0A0A0A 100%);
  --gradient-accent: linear-gradient(135deg, #E8820C, #D4740A, #C4A87C);
  --gradient-card: linear-gradient(145deg, #151515 0%, #1A1612 100%);

  /* Typography */
  --font-heading: 'Playfair Display', 'Noto Serif SC', serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --font-chinese-heading: 'Noto Serif SC', serif;
  --font-chinese-body: 'Noto Sans SC', sans-serif;

  /* Spacing */
  --section-padding: clamp(60px, 10vw, 120px);
  --container-max: 1280px;
  --container-wide: 1440px;

  /* Effects */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: all 0.25s ease;
  --shadow-glow: 0 0 40px rgba(232, 130, 12, 0.12);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.6);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-pill: 100px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 60px);
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 60px);
}

/* --- Language Toggle Visibility --- */
[data-lang="zh"] { display: none; }
body.lang-zh [data-lang="zh"] { display: initial; }
body.lang-zh [data-lang="en"] { display: none; }

/* Block-level lang elements */
div[data-lang="zh"],
p[data-lang="zh"],
h1[data-lang="zh"],
h2[data-lang="zh"],
h3[data-lang="zh"],
h4[data-lang="zh"],
span[data-lang="zh"],
li[data-lang="zh"],
label[data-lang="zh"],
a[data-lang="zh"] { display: none; }

body.lang-zh div[data-lang="zh"],
body.lang-zh p[data-lang="zh"],
body.lang-zh h1[data-lang="zh"],
body.lang-zh h2[data-lang="zh"],
body.lang-zh h3[data-lang="zh"],
body.lang-zh h4[data-lang="zh"],
body.lang-zh span[data-lang="zh"],
body.lang-zh li[data-lang="zh"],
body.lang-zh label[data-lang="zh"],
body.lang-zh a[data-lang="zh"] { display: block; }

body.lang-zh div[data-lang="en"],
body.lang-zh p[data-lang="en"],
body.lang-zh h1[data-lang="en"],
body.lang-zh h2[data-lang="en"],
body.lang-zh h3[data-lang="en"],
body.lang-zh h4[data-lang="en"],
body.lang-zh span[data-lang="en"],
body.lang-zh li[data-lang="en"],
body.lang-zh label[data-lang="en"],
body.lang-zh a[data-lang="en"] { display: none; }

/* Inline lang elements */
body.lang-zh span[data-lang="zh"] { display: inline; }
body.lang-zh span[data-lang="en"] { display: none; }
span[data-lang="zh"] { display: none; }
span[data-lang="en"] { display: inline; }

/* ===================================================
   NAVIGATION
   =================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 clamp(20px, 4vw, 60px);
  transition: var(--transition-smooth);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

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

.nav-logo-icon {
  width: 42px;
  height: 42px;
  position: relative;
}

.nav-logo-icon svg {
  width: 100%;
  height: 100%;
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.nav-logo-text .sub {
  display: block;
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 3px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: -2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gradient-accent);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-pill);
  padding: 3px;
  border: 1px solid var(--border-subtle);
}

.lang-toggle button {
  padding: 5px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: var(--radius-pill);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.lang-toggle button.active {
  background: var(--accent-primary);
  color: var(--text-dark);
}

.lang-toggle button:hover:not(.active) {
  color: var(--text-primary);
}

/* Mobile Menu */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
  border-radius: 2px;
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================================================
   HERO SECTION
   =================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, var(--bg-primary) 75%);
}

/* Floating particles */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 24px;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease both;
  background: rgba(232, 130, 12, 0.05);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: 12px;
  letter-spacing: -1px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

body.lang-zh .hero-title {
  font-family: var(--font-chinese-heading);
  letter-spacing: 2px;
}

.hero-title .accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-brand {
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  font-weight: 300;
  letter-spacing: 12px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.8;
  font-weight: 300;
  animation: fadeInUp 0.8s ease 0.4s both;
}

body.lang-zh .hero-subtitle {
  font-family: var(--font-chinese-body);
  letter-spacing: 1px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 40px;
  background: var(--gradient-accent);
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  animation: fadeInUp 0.8s ease 0.5s both;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 24px rgba(232, 130, 12, 0.3);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(232, 130, 12, 0.45);
}

.hero-cta .arrow {
  transition: transform 0.3s ease;
}

.hero-cta:hover .arrow {
  transform: translateX(4px);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-scroll-indicator span {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.5; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===================================================
   SECTION COMMON
   =================================================== */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-divider {
  width: 60px;
  height: 2px;
  background: var(--gradient-accent);
  margin: 0 auto 20px;
  border-radius: 2px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent-primary);
  text-align: center;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 600;
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.2;
}

body.lang-zh .section-title {
  font-family: var(--font-chinese-heading);
  letter-spacing: 2px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
  line-height: 1.8;
  font-weight: 300;
}

body.lang-zh .section-subtitle {
  font-family: var(--font-chinese-body);
}

/* Scroll-triggered animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===================================================
   BRAND STORY / PHILOSOPHY
   =================================================== */
.brand-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.brand-quote {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-style: italic;
  color: var(--champagne);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
  line-height: 1.8;
  position: relative;
  padding: 0 20px;
}

body.lang-zh .brand-quote {
  font-family: var(--font-chinese-heading);
  font-style: normal;
}

.brand-quote::before {
  content: '"';
  font-family: var(--font-heading);
  font-size: 5rem;
  color: var(--accent-primary);
  opacity: 0.3;
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
}

.brand-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 60px;
}

.pillar {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.pillar:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.pillar-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 130, 12, 0.08);
  border: 1px solid var(--border-accent);
}

.pillar-icon svg {
  width: 32px;
  height: 32px;
  color: var(--accent-primary);
}

.pillar-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--gold-light);
}

.pillar-title-zh {
  font-family: var(--font-chinese-heading);
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.pillar-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===================================================
   PRODUCTS
   =================================================== */
.products-section {
  background: var(--bg-primary);
}

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

.product-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-smooth);
  position: relative;
}

.product-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-card-hover), var(--shadow-glow);
  transform: translateY(-8px);
}

.product-card-image {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: #0D0D0D;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-glow {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg-card), transparent);
  z-index: 1;
}

.product-card-content {
  padding: 28px 28px 32px;
}

.product-card-label {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-pill);
  color: var(--accent-primary);
  margin-bottom: 14px;
  background: rgba(232, 130, 12, 0.06);
}

.product-card-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

body.lang-zh .product-card-name {
  font-family: var(--font-chinese-heading);
}

.product-card-name-sub {
  font-size: 0.85rem;
  color: var(--gold);
  margin-bottom: 14px;
  font-weight: 500;
}

.product-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.product-card-features {
  list-style: none;
  margin-bottom: 24px;
}

.product-card-features li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-card-features li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  flex-shrink: 0;
}

.product-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--gold);
  color: var(--gold);
  border-radius: var(--radius-pill);
  transition: var(--transition-smooth);
}

.product-card-btn:hover {
  background: var(--gold);
  color: var(--text-dark);
}

/* ===================================================
   SHOWROOM GALLERY
   =================================================== */
.showroom-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.gallery-item:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  z-index: 2;
  transform: scale(1.03);
}

.gallery-item.large {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

.gallery-item-overlay span {
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* Video card */
.gallery-video-card {
  grid-column: span 2;
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-accent);
  cursor: pointer;
}

.gallery-video-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  transition: background 0.3s ease;
}

.gallery-video-card:hover .video-play-overlay {
  background: rgba(0,0,0,0.15);
}

.play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(232, 130, 12, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 30px rgba(232, 130, 12, 0.4);
}

.play-btn svg {
  width: 24px;
  height: 24px;
  color: var(--text-dark);
  margin-left: 3px;
}

.gallery-video-card:hover .play-btn {
  transform: scale(1.1);
  box-shadow: 0 8px 40px rgba(232, 130, 12, 0.6);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid var(--border-subtle);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition-fast);
  border: 1px solid var(--border-subtle);
}

.lightbox-nav:hover {
  background: var(--accent-primary);
  color: var(--text-dark);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* ===================================================
   ABOUT / COMPANY
   =================================================== */
.about-section {
  background: var(--bg-primary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  aspect-ratio: 4/3;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(232, 130, 12, 0.1);
}

.about-text h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--gold-light);
}

body.lang-zh .about-text h3 {
  font-family: var(--font-chinese-heading);
}

.about-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.company-details {
  margin-top: 32px;
  padding: 28px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.company-details-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 16px;
}

.company-detail-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.company-detail-row:last-child {
  border-bottom: none;
}

.company-detail-label {
  color: var(--text-muted);
  min-width: 160px;
  flex-shrink: 0;
}

.company-detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* ===================================================
   CONTACT
   =================================================== */
.contact-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(232, 130, 12, 0.08);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
}

.contact-info-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.contact-info-value {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-map {
  margin-top: 32px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  height: 220px;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: none;
  filter: grayscale(0.8) brightness(0.5) contrast(1.2);
  transition: filter 0.5s ease;
}

.contact-map:hover iframe {
  filter: grayscale(0.3) brightness(0.7) contrast(1.1);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  padding: 14px 18px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(232, 130, 12, 0.1);
}

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

.form-submit {
  padding: 14px 36px;
  background: var(--gradient-accent);
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  transition: var(--transition-smooth);
  align-self: flex-start;
  box-shadow: 0 4px 20px rgba(232, 130, 12, 0.25);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232, 130, 12, 0.4);
}

/* ===================================================
   FOOTER
   =================================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 4px;
}

.footer-brand-sub {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-brand-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-links-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links-list a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--accent-primary);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-uen {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    gap: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 40px;
    transition: right 0.4s ease;
    border-left: 1px solid var(--border-subtle);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-hamburger {
    display: flex;
  }

  .brand-pillars {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .products-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-item.large {
    grid-column: span 2;
    grid-row: span 1;
  }

  .gallery-video-card {
    grid-column: span 2;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-title {
    font-size: clamp(2.2rem, 8vw, 3.5rem);
  }

  .company-detail-row {
    flex-direction: column;
    gap: 4px;
  }

  .company-detail-label {
    min-width: unset;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item.large {
    grid-column: span 1;
  }

  .gallery-video-card {
    grid-column: span 1;
  }

  .nav-inner {
    height: 64px;
  }

  .hero-badge {
    font-size: 0.65rem;
    padding: 6px 16px;
  }

  .hero-brand {
    letter-spacing: 6px;
    font-size: 0.8rem;
  }
}

/* ===================================================
   CUSTOM SCROLLBAR
   =================================================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* ===================================================
   LOADING SCREEN
   =================================================== */
.loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 24px;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-logo {
  width: 60px;
  height: 60px;
  animation: loaderPulse 1.5s ease infinite;
}

@keyframes loaderPulse {
  0%, 100% { opacity: 0.4; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.05); }
}

.loader-bar {
  width: 120px;
  height: 2px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
}

.loader-bar-inner {
  width: 0%;
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 2px;
  animation: loaderProgress 1.5s ease forwards;
}

@keyframes loaderProgress {
  0% { width: 0%; }
  100% { width: 100%; }
}