/* ============================================
   聊城市誉林工业设计有限公司 - Premium Website
   Design System: Industrial Elegance
   ============================================ */

/* === Design Tokens === */
:root {
  /* Colors - Dark Theme */
  --color-bg-primary: #0a0a0b;
  --color-bg-secondary: #131316;
  --color-bg-tertiary: #1c1c20;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.15);

  /* Rust/Weathering Steel Palette */
  --color-rust: #c66b3d;
  --color-rust-light: #e08855;
  --color-rust-dark: #8b4a2a;
  --color-copper: #b87333;
  --color-gold: #d4a843;

  /* Text */
  --color-text-primary: #f5f5f7;
  --color-text-secondary: #a1a1a6;
  --color-text-tertiary: #6e6e73;

  /* Functional */
  --color-accent: var(--color-rust);
  --color-accent-glow: rgba(198, 107, 61, 0.35);

  /* Typography */
  --font-display: 'SF Pro Display', -apple-system, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'SF Pro Text', -apple-system, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-premium: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.4s;
  --duration-slow: 0.7s;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 60px var(--color-accent-glow);

  /* Layout */
  --max-width: 1280px;
  --nav-height: 64px;
}

/* Light Theme Override */
[data-theme="light"] {
  --color-bg-primary: #f5f5f7;
  --color-bg-secondary: #ffffff;
  --color-bg-tertiary: #e8e8ed;
  --color-surface: rgba(0, 0, 0, 0.03);
  --color-surface-hover: rgba(0, 0, 0, 0.06);
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-strong: rgba(0, 0, 0, 0.15);
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #515154;
  --color-text-tertiary: #86868b;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--duration-normal) var(--ease-smooth),
              color var(--duration-normal) var(--ease-smooth);
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-rust);
}

/* === Selection === */
::selection {
  background: var(--color-rust);
  color: #fff;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--duration-normal) var(--ease-smooth);
}

[data-theme="light"] .nav {
  background: rgba(245, 245, 247, 0.72);
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.92);
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .nav.scrolled {
  background: rgba(245, 245, 247, 0.92);
}

.nav-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-rust), var(--color-copper));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-smooth);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-rust);
  transition: width var(--duration-normal) var(--ease-premium);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.lang-toggle:hover {
  border-color: var(--color-border-strong);
}

.lang-btn {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  color: var(--color-text-tertiary);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.lang-btn.active {
  background: var(--color-rust);
  color: #fff;
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.theme-toggle:hover {
  background: var(--color-surface-hover);
  transform: scale(1.05);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Mobile Menu Button */
.nav-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

.nav-menu-btn span {
  width: 20px;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.nav-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

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

.nav-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg-primary);
}

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

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(198, 107, 61, 0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 60%, rgba(184, 115, 51, 0.08) 0%, transparent 50%);
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, var(--color-bg-primary) 100%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 var(--space-md);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  backdrop-filter: blur(10px);
}

.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-rust);
  box-shadow: 0 0 8px var(--color-rust);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-sm);
  background: linear-gradient(180deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-wrap: balance;
}

.hero-title .accent {
  background: linear-gradient(135deg, var(--color-rust-light), var(--color-rust), var(--color-copper));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.375rem);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  line-height: 1.5;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 14px 32px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-premium);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-rust);
  color: #fff;
  box-shadow: 0 4px 20px rgba(198, 107, 61, 0.3);
}

.btn-primary:hover {
  background: var(--color-rust-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(198, 107, 61, 0.45);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::after {
  width: 300px;
  height: 300px;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.btn-arrow {
  transition: transform var(--duration-fast) var(--ease-smooth);
}

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

/* === Scroll Indicator === */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
}

.scroll-indicator-mouse {
  width: 24px;
  height: 38px;
  border: 1.5px solid var(--color-text-tertiary);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator-mouse::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--color-text-tertiary);
  border-radius: 2px;
  animation: scrollWheel 1.8s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { opacity: 0; transform: translate(-50%, 0); }
  50% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 12px); }
}

/* === Product Showcase (Apple-style Carousel) === */
.showcase {
  position: relative;
}

.showcase-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  scroll-snap-align: start;
}

.showcase-container {
  width: 100%;
  max-width: var(--max-width);
  padding: var(--space-xl) var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.showcase-section:nth-child(even) .showcase-container {
  direction: rtl;
}

.showcase-section:nth-child(even) .showcase-content {
  direction: ltr;
}

.showcase-section:nth-child(even) .showcase-image-wrap {
  direction: ltr;
}

.showcase-content {
  max-width: 520px;
}

.showcase-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-rust);
  margin-bottom: var(--space-sm);
}

.showcase-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
  text-wrap: balance;
}

.showcase-desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  font-weight: 300;
  text-wrap: balance;
}

.showcase-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.showcase-feature {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-smooth);
}

.showcase-feature:hover {
  border-color: var(--color-rust);
  color: var(--color-rust-light);
}

.showcase-feature-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-rust);
}

/* Showcase Image */
.showcase-image-wrap {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-bg-secondary);
}

.showcase-image-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--color-accent-glow) 0%, transparent 70%);
  z-index: 1;
  opacity: 0.5;
}

.showcase-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-premium);
}

.showcase-section:hover .showcase-image {
  transform: scale(1.05);
}

.showcase-number {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 2;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
}

/* === Products Grid === */
.products-grid-section {
  padding: var(--space-2xl) var(--space-md);
  background: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 900px;
  margin: 0 auto var(--space-xl);
  padding: 0 var(--space-sm);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-rust);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
  text-wrap: balance;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-weight: 300;
}

.products-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.product-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  transition: all var(--duration-normal) var(--ease-premium);
  cursor: pointer;
  aspect-ratio: 3 / 4;
}

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

.product-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-premium),
              opacity var(--duration-normal) var(--ease-smooth);
}

.product-card:hover .product-card-image {
  transform: scale(1.08);
}

/* Hover-swap: alternate angle image */
.product-card-image-alt {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.08);
  transition: opacity var(--duration-normal) var(--ease-premium),
              transform var(--duration-slow) var(--ease-premium);
  pointer-events: none;
}

.product-card:hover .product-card-image-alt {
  opacity: 1;
  transform: scale(1.12);
}

.product-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 10, 11, 0.95) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
}

[data-theme="light"] .product-card-overlay {
  background: linear-gradient(180deg, transparent 50%, rgba(255, 255, 255, 0.95) 100%);
}

.product-card-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.product-card-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* === Materials Section === */
.materials-section {
  padding: var(--space-2xl) var(--space-md);
  position: relative;
  overflow: hidden;
}

.materials-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.15;
}

.materials-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.materials-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.material-card {
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  transition: all var(--duration-normal) var(--ease-premium);
}

.material-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-rust);
  transform: translateY(-4px);
}

.material-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-rust-dark), var(--color-rust));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
  color: #fff;
}

.material-icon svg {
  width: 24px;
  height: 24px;
}

.material-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.material-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* === Stats Section === */
.stats-section {
  padding: var(--space-xl) var(--space-md);
  background: var(--color-bg-secondary);
}

.stats-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-rust-light), var(--color-rust), var(--color-copper));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* === About Section === */
.about-section {
  padding: var(--space-2xl) var(--space-md);
}

.about-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about-content {
  max-width: 600px;
}

.about-title {
  font-size: clamp(1.875rem, 3.5vw, 2.75rem);
  text-wrap: balance;
}

.about-text {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
  text-wrap: balance;
}

.about-text p {
  margin-bottom: var(--space-sm);
}

.about-contact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.about-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  padding: var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: background var(--duration-fast) var(--ease-premium),
              border-color var(--duration-fast) var(--ease-premium),
              transform var(--duration-fast) var(--ease-premium);
}

.about-contact-item:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.about-contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: rgba(217, 119, 68, 0.15);
  border-radius: var(--radius-sm);
  color: var(--color-rust);
}

.about-contact-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.about-contact-label {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about-contact-value {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.about-image-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

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

/* === Contact / CTA Section === */
.cta-section {
  padding: var(--space-2xl) var(--space-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, var(--color-accent-glow) 0%, transparent 60%);
  opacity: 0.5;
}

.cta-container {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.cta-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  font-weight: 300;
}

.cta-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* === Footer === */
.footer {
  padding: var(--space-lg) var(--space-md) var(--space-md);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-smooth);
}

.footer-col a:hover {
  color: var(--color-rust-light);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
}

.footer-bottom a:hover {
  color: var(--color-rust-light);
}

/* === Reveal Animation === */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-premium), transform 0.8s var(--ease-premium);
}

.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; }

/* === Mobile Menu === */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-primary);
  z-index: 999;
  padding: var(--space-md);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-premium);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 500;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

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

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

  .stats-container {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

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

@media (max-width: 768px) {
  :root {
    --space-2xl: 5rem;
    --space-xl: 3rem;
    --space-lg: 2rem;
  }

  .nav-links {
    display: none;
  }

  .nav-menu-btn {
    display: flex;
  }

  .showcase-container {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .showcase-section:nth-child(even) .showcase-container {
    direction: ltr;
  }

  .showcase-image-wrap {
    aspect-ratio: 4 / 3;
  }

  .showcase-section {
    min-height: auto;
  }

  .about-container {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
}

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

  .stats-container {
    grid-template-columns: 1fr;
  }

  .showcase-features {
    gap: 6px;
  }

  .showcase-feature {
    font-size: 0.75rem;
    padding: 4px 10px;
  }
}

/* === Print === */
@media print {
  .nav, .scroll-indicator, .hero-particles, .mobile-menu {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}