/* ============================================
   XGW Digital Technology - Professional Website
   Modern European/American Corporate Style
   ============================================ */

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

:root {
  /* Brand Colors - Professional Tech Navy & Electric Blue */
  --color-primary: #0A2540;
  --color-primary-light: #1a3a5c;
  --color-primary-dark: #061a2e;
  --color-accent: #0066FF;
  --color-accent-light: #3b82f6;
  --color-accent-dark: #0052cc;
  --color-secondary: #00B4D8;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0A2540;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-text-inverse: #f8fafc;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0A2540 0%, #0f3460 50%, #1a3a5c 100%);
  --gradient-accent: linear-gradient(135deg, #0066FF 0%, #00B4D8 100%);
  --gradient-card: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  --gradient-dark: linear-gradient(180deg, #0A2540 0%, #061a2e 100%);

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Poppins', 'Inter', -apple-system, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-accent: 0 8px 24px rgba(0, 102, 255, 0.2);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Layout */
  --container-max: 1280px;
  --header-height: 72px;
  --header-height-scrolled: 64px;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h3 { font-size: clamp(1.4rem, 3vw, 1.8rem); }
h4 { font-size: 1.25rem; }

p { color: var(--color-text-secondary); }

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

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

/* ===== Layout Utilities ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--gradient-dark);
  color: var(--color-text-inverse);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: #fff;
}

.section-dark p {
  color: rgba(248, 250, 252, 0.7);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 102, 255, 0.08);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-sans);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 102, 255, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(0, 102, 255, 0.04);
}

.btn-white {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-ghost-light {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow-md);
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  flex-shrink: 0;
}

.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-text {
  letter-spacing: -0.03em;
}

.logo-text span {
  color: var(--color-accent);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

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

.nav-menu > li {
  position: relative;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 4px;
  position: relative;
  cursor: pointer;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Dropdown */
.has-dropdown > .nav-link::before {
  content: '\25BC';
  font-size: 0.6rem;
  margin-left: 4px;
  margin-right: -4px;
  opacity: 0.5;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 260px;
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  list-style: none;
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.dropdown li a:hover {
  background: var(--color-bg-alt);
  color: var(--color-accent);
}

.dropdown-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
}

.lang-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-flag {
  font-size: 1.1rem;
  line-height: 1;
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  min-width: 160px;
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: 100;
  list-style: none;
}

.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-dropdown li {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-fast);
}

.lang-dropdown li:hover {
  background: var(--color-bg-alt);
}

.lang-dropdown li.active {
  background: rgba(0, 102, 255, 0.08);
  color: var(--color-accent);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(0, 180, 216, 0.1) 0%, transparent 50%);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to top, rgba(255,255,255,0.05), transparent);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  margin-bottom: var(--space-xl);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-secondary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero h1 {
  color: #fff;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.03em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, #00B4D8 0%, #0066FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Hero visual */
.hero-visual {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  max-width: 600px;
  opacity: 0.9;
  z-index: 1;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  top: 10%;
  right: 5%;
  animation: float 6s ease-in-out infinite;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: var(--color-secondary);
  bottom: 10%;
  left: 20%;
  animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

/* ===== Stats Bar ===== */
.stats-bar {
  background: var(--color-primary);
  padding: var(--space-2xl) 0;
  position: relative;
  overflow: hidden;
}

.stats-bar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-number .suffix {
  color: var(--color-secondary);
  font-size: 2rem;
}

.stat-label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  font-weight: 500;
}

/* ===== Product Cards ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--color-accent-light);
}

.product-card-header {
  padding: var(--space-2xl) var(--space-xl) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.product-card-header.led {
  background: linear-gradient(135deg, #0A2540 0%, #1a3a5c 100%);
}

.product-card-header.ps {
  background: linear-gradient(135deg, #1a3a5c 0%, #0d5e8a 100%);
}

.product-card-header.ess {
  background: linear-gradient(135deg, #0d5e8a 0%, #0A2540 100%);
}

.product-card-header::after {
  content: '';
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}

.product-icon {
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: var(--space-md);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-card-header h3 {
  color: #fff;
  margin-bottom: var(--space-sm);
}

.product-card-header .card-desc {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.6;
}

.product-card-body {
  padding: var(--space-lg) var(--space-xl) var(--space-xl);
  flex: 1;
}

.product-card-img {
  width: 100%;
  height: 240px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-md);
  transition: transform 0.4s ease;
}

.product-card:hover .product-card-img img {
  transform: scale(1.03);
}

.tree-leaf {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.tree-leaf:last-child {
  border-bottom: none;
}

.tree-leaf-img {
  width: 120px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tree-leaf-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 4px;
  transition: transform 0.3s ease;
}

.tree-leaf:hover .tree-leaf-img img {
  transform: scale(1.05);
}

.tree-leaf-content {
  flex: 1;
}

.tree-leaf-content h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.tree-leaf-content p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 9999;
  transition: all 0.3s ease;
  cursor: pointer;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.6);
}

.whatsapp-float svg {
  width: 30px;
  height: 30px;
  fill: #fff;
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: #25D366;
  animation: wa-pulse 2s ease-out infinite;
  z-index: -1;
}

@keyframes wa-pulse {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.6); opacity: 0; }
}

.product-sub-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.product-sub-item:last-child {
  border-bottom: none;
}

.product-sub-item-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  color: var(--color-accent);
}

.product-sub-item-content h5 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.product-sub-item-content p {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.product-card-footer {
  padding: 0 var(--space-xl) var(--space-xl);
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.product-card-link:hover {
  gap: 12px;
}

/* ===== Solutions Section ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.solution-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.solution-card-img {
  height: 200px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.solution-card-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 180, 216, 0.2) 0%, transparent 60%);
}

.solution-card-icon {
  font-size: 3rem;
  position: relative;
  z-index: 1;
}

.solution-card-body {
  padding: var(--space-xl);
}

.solution-card-body h4 {
  margin-bottom: var(--space-sm);
}

.solution-card-body p {
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ===== Why Choose Us ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.why-card {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-light);
}

.why-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: rgba(0, 102, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto var(--space-md);
  color: var(--color-accent);
}

.why-card h4 {
  margin-bottom: var(--space-sm);
}

.why-card p {
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ===== Certifications ===== */
.cert-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
}

.cert-badge {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.cert-badge:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.cert-badge-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.cert-badge-text {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-text p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.about-visual {
  position: relative;
}

.about-image-box {
  background: var(--gradient-hero);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-image-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.3) 0%, transparent 70%);
}

.about-image-box h3 {
  color: #fff;
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  position: relative;
}

.about-image-box .subtitle {
  color: rgba(255, 255, 255, 0.7);
  position: relative;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
  position: relative;
}

.about-stat {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.about-stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-secondary);
}

.about-stat-label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== News Section ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-card-img {
  height: 180px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  position: relative;
}

.news-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, transparent 100%);
}

.news-card-body {
  padding: var(--space-lg) var(--space-xl);
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.news-card-body h4 {
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
  line-height: 1.4;
}

.news-card-body p {
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
  background: var(--gradient-hero);
  padding: var(--space-4xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 180, 216, 0.15) 0%, transparent 60%);
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  color: #fff;
  margin-bottom: var(--space-md);
}

.cta-section .subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.15rem;
  margin-bottom: var(--space-2xl);
}

/* ===== Contact Section ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.contact-info-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(0, 102, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-info-content h5 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.contact-info-content p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.contact-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-family: var(--font-sans);
  transition: var(--transition-base);
  background: var(--color-bg-alt);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

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

/* ===== Footer ===== */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h5 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

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

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.88rem;
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 1.1rem;
  transition: var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ===== Scroll to top ===== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-accent);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 102, 255, 0.3);
}

/* ===== Product Detail Page ===== */
.product-detail-hero {
  background: var(--gradient-hero);
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  color: #fff;
}

.product-detail-hero h1 {
  color: #fff;
  margin-bottom: var(--space-md);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb-sep {
  opacity: 0.5;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.product-detail-visual {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: calc(var(--header-height) + var(--space-md));
}

.product-detail-icon {
  font-size: 6rem;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-lg);
}

.spec-table th,
.spec-table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.9rem;
}

.spec-table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  width: 40%;
}

.spec-table td {
  color: var(--color-primary);
  font-weight: 500;
}

/* Product hierarchy tree */
.product-tree {
  margin-top: var(--space-xl);
}

.tree-branch {
  margin-bottom: var(--space-lg);
}

.tree-branch-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
}

.tree-branch-header:hover {
  background: rgba(0, 102, 255, 0.05);
}

.tree-branch-icon {
  font-size: 1.5rem;
}

.tree-branch-title {
  font-weight: 600;
  color: var(--color-primary);
}

.tree-branch-content {
  padding-left: var(--space-2xl);
  margin-top: var(--space-sm);
}

.tree-leaf {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-left: 2px solid var(--color-border);
  margin-left: var(--space-sm);
  transition: var(--transition-base);
}

.tree-leaf:hover {
  border-left-color: var(--color-accent);
  background: var(--color-bg-alt);
}

.tree-leaf-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(0, 102, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.tree-leaf-content h5 {
  font-size: 0.92rem;
  margin-bottom: 2px;
}

.tree-leaf-content p {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }

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

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

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .hero-visual {
    display: none;
  }

  .about-grid,
  .contact-grid,
  .product-detail-grid {
    grid-template-columns: 1fr;
  }
}

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

  .menu-toggle {
    display: flex;
  }

  .nav-menu.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    gap: var(--space-md);
    border-top: 1px solid var(--color-border-light);
  }

  .nav-menu.mobile-open .has-dropdown .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: var(--space-md);
  }

  .products-grid,
  .solutions-grid,
  .why-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

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

  .stat-number {
    font-size: 2.2rem;
  }

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

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .container {
    padding: 0 var(--space-md);
  }

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

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

  .hero-actions {
    flex-direction: column;
  }

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