/* ============================================================
   LUB ROYAL CONTROL — V001 PREMIUM INDUSTRIAL PRODUCT PAGE
   Version 3.0 — Revolutionary Visual System
   Theme: Deep Industrial Navy + Liquid Gold Accents
   Glassmorphism • Micro-interactions • Full RTL + LTR
   Bilingual (FA default / EN) • Fully Responsive
   Font: B Nazanin (FA) | Inter / System (EN)
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS & CSS VARIABLES
   ============================================================ */
:root {
  /* Core Palette */
  --navy-950: #030712;
  --navy-900: #060d18;
  --navy-850: #0a1422;
  --navy-800: #0c1a2e;
  --navy-700: #132337;
  --navy-600: #1a3a5c;
  --navy-500: #234b73;

  --gold-400: #ffc933;
  --gold-500: #f0a500;
  --gold-600: #d99400;
  --gold-700: #c27d00;
  --gold-glow: rgba(240, 165, 0, 0.35);
  --gold-soft: rgba(240, 165, 0, 0.12);
  --gold-border: rgba(240, 165, 0, 0.28);

  --white: #ffffff;
  --off-white: #f8fafc;
  --slate-50: #f1f5f9;
  --slate-100: #e2e8f0;
  --slate-200: #cbd5e1;
  --slate-300: #94a3b8;
  --slate-400: #64748b;
  --slate-500: #475569;
  --slate-600: #334155;
  --slate-700: #1e293b;
  --slate-800: #0f172a;
  --slate-900: #020617;

  --success: #10b981;
  --danger: #ef4444;
  --blue: #3b82f6;
  --blue-soft: rgba(59, 130, 246, 0.12);

  /* Semantic */
  --primary: var(--navy-900);
  --primary-light: var(--navy-800);
  --secondary: var(--navy-600);
  --accent: var(--gold-500);
  --accent-hover: var(--gold-400);
  --text: var(--slate-800);
  --text-light: var(--slate-700);
  --text-muted: var(--slate-500);
  --border: var(--slate-100);

  /* Shadows */
  --shadow-xs: 0 1px 3px rgba(3, 7, 18, 0.06);
  --shadow-sm: 0 4px 12px rgba(3, 7, 18, 0.07);
  --shadow: 0 8px 30px rgba(3, 7, 18, 0.09);
  --shadow-md: 0 12px 40px rgba(3, 7, 18, 0.12);
  --shadow-lg: 0 24px 60px rgba(3, 7, 18, 0.16);
  --shadow-xl: 0 32px 80px rgba(3, 7, 18, 0.22);
  --shadow-gold: 0 8px 32px var(--gold-glow);
  --shadow-gold-lg: 0 16px 48px rgba(240, 165, 0, 0.4);

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition: 0.35s var(--ease);
  --transition-fast: 0.2s var(--ease);
  --transition-slow: 0.55s var(--ease);

  /* Layout */
  --header-h: 78px;
  --container: 1240px;
  --section-pad: 110px;

  /* Typography */
  --font-fa: "B Nazanin", "BNazanin", "IRANSans", "Vazirmatn", "Tahoma", sans-serif;
  --font-en: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font: var(--font-fa);

  /* Backgrounds */
  --bg-body: linear-gradient(168deg, #e6edf6 0%, #d8e2ef 32%, #cdd8e8 58%, #e2eaf4 100%);
  --bg-section-alt: linear-gradient(180deg, #d2dce9 0%, #dde6f1 48%, #e8eff7 100%);
  --bg-dark: linear-gradient(155deg, #030712 0%, #0a1422 42%, #0f1f35 100%);
  --bg-hero: linear-gradient(148deg, #030712 0%, #0a1422 35%, #0f1f35 65%, #132337 100%);
  --glass: rgba(255, 255, 255, 0.68);
  --glass-dark: rgba(6, 13, 24, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
}

/* English mode */
html[lang="en"] {
  --font: var(--font-en);
  direction: ltr;
}
html[lang="en"] body {
  font-family: var(--font-en);
  letter-spacing: -0.01em;
}
html[lang="fa"] body {
  font-family: var(--font-fa);
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  color: var(--text);
  background: var(--bg-body);
  background-attachment: fixed;
  line-height: 1.8;
  font-size: 17px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  user-select: none;
}

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

ul, ol { list-style: none; }

button, input, textarea, select {
  font-family: inherit;
  border: none;
  outline: none;
  background: transparent;
}

button { cursor: pointer; }

::selection {
  background: rgba(240, 165, 0, 0.25);
  color: var(--navy-900);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--navy-900);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--gold-500), var(--gold-600));
  border-radius: 10px;
  border: 2px solid var(--navy-900);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gold-400);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================================
   3. UTILITY & ANIMATION CLASSES
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.08s; }
.fade-up-delay-2 { transition-delay: 0.16s; }
.fade-up-delay-3 { transition-delay: 0.24s; }
.fade-up-delay-4 { transition-delay: 0.32s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes pulse-gold {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240, 165, 0, 0.35); }
  50% { box-shadow: 0 0 0 14px rgba(240, 165, 0, 0); }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes loadBar {
  to { width: 100%; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.22; }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes border-glow {
  0%, 100% { border-color: rgba(240, 165, 0, 0.25); }
  50% { border-color: rgba(240, 165, 0, 0.55); }
}

/* ============================================================
   4. PRELOADER
   ============================================================ */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.65s var(--ease), visibility 0.65s var(--ease);
}
#preloader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-inner {
  text-align: center;
  position: relative;
}
.loader-logo {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 5px;
  margin-bottom: 28px;
  text-shadow: 0 0 40px var(--gold-glow);
  position: relative;
}
.loader-logo::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.loader-bar {
  width: 220px;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin: 0 auto;
  position: relative;
}
.loader-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold-600), var(--gold-400), var(--gold-500));
  background-size: 200% 100%;
  animation: loadBar 1.4s var(--ease-out) forwards, shimmer 1.8s linear infinite;
  border-radius: 4px;
}
.loader-sub {
  margin-top: 18px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 3px;
  font-weight: 600;
  text-transform: uppercase;
}

/* ============================================================
   5. HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-h);
  /* background: rgba(3, 7, 18, 0.78); */
  background: linear-gradient(135deg, #2c5f7c 0%, #143e53cc 50%, #7ed30e 100%);
  backdrop-filter: blur(22px) saturate(1.5);
  -webkit-backdrop-filter: blur(22px) saturate(1.5);
  z-index: 1000;
  transition: height 0.35s var(--ease), background 0.35s var(--ease), box-shadow 0.35s var(--ease);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.site-header.scrolled {
  background: linear-gradient(135deg, #1b597e 0%, #143e53cc 50%, #79d402 100%);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
  height: 68px;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  height: 50px;
}
.logo-icon img {
  height: 50px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 10px rgba(240, 165, 0, 0.3));
  transition: var(--transition);
}
.logo:hover .logo-icon img {
  filter: drop-shadow(0 4px 16px rgba(240, 165, 0, 0.5));
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}
.logo-text strong {
  font-size: 1.18rem;
  letter-spacing: 1.8px;
  font-weight: 800;
}
.logo-text small {
  font-size: 0.66rem;
  opacity: 0.6;
  letter-spacing: 2.8px;
  font-weight: 600;
  margin-top: 1px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Language Switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-full);
  padding: 3px;
  margin-inline-end: 8px;
}
.lang-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.65);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.6px;
  min-width: 42px;
  text-align: center;
}
.lang-btn.active {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  box-shadow: 0 2px 12px var(--gold-glow);
}
.lang-btn:hover:not(.active) {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 1px;
}
.main-nav a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  white-space: nowrap;
}
.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  right: 12px;
  left: 12px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}
html[lang="en"] .main-nav a::after {
  right: 12px;
  left: 12px;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--accent);
  background: var(--gold-soft);
}
.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1);
}
.main-nav .btn-nav {
  background: linear-gradient(135deg, var(--gold-500) 0%, var(--gold-600) 100%);
  color: var(--navy-900) !important;
  font-weight: 800;
  margin-inline-start: 6px;
  box-shadow: 0 4px 18px var(--gold-glow);
  border: none;
}
.main-nav .btn-nav::after { display: none; }
.main-nav .btn-nav:hover {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(240, 165, 0, 0.5);
  color: var(--navy-900) !important;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  cursor: pointer;
  padding: 10px;
  border-radius: 8px;
  transition: var(--transition);
}
.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}
.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ============================================================
   6. HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 52px) 0 80px;
  /* background: var(--bg-hero); */
  background: linear-gradient(135deg, #2c5f7c 0%, #143e53cc 50%, #020c44 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 70% at 12% 45%, rgba(240, 165, 0, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse 70% 55% at 88% 18%, rgba(59, 130, 246, 0.08) 0%, transparent 48%),
    radial-gradient(ellipse 55% 45% at 55% 92%, rgba(240, 165, 0, 0.06) 0%, transparent 50%);
  pointer-events: none;
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at center, black 15%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at center, black 15%, transparent 72%);
  pointer-events: none;
  opacity: 0.7;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.5;
}
.hero-orb-1 {
  width: 420px;
  height: 420px;
  background: rgba(240, 165, 0, 0.12);
  top: -10%;
  right: -5%;
  animation: float 9s ease-in-out infinite;
}
.hero-orb-2 {
  width: 320px;
  height: 320px;
  background: rgba(59, 130, 246, 0.1);
  bottom: 5%;
  left: -8%;
  animation: float 11s ease-in-out infinite reverse;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-text .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(240, 165, 0, 0.13);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--gold-border);
  margin-bottom: 24px;
  letter-spacing: 0.4px;
  backdrop-filter: blur(8px);
  animation: border-glow 3s ease-in-out infinite;
}
.hero-text .badge::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  animation: pulse-gold 2s infinite;
}
.hero h1 {
  font-size: clamp(1.95rem, 3.9vw, 3.15rem);
  color: var(--white);
  line-height: 1.26;
  margin-bottom: 18px;
  font-weight: 800;
  letter-spacing: -0.4px;
}
.hero h1 .highlight {
  color: var(--accent);
  text-shadow: 0 0 48px rgba(240, 165, 0, 0.4);
  position: relative;
}
.hero-subtitle {
  margin-bottom: 20px;
  font-weight: 600;
  font-size: 1.14rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.65;
}
.hero-desc {
  color: rgba(255, 255, 255, 0.65);
  font-size: 1.05rem;
  margin-bottom: 34px;
  max-width: 540px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 15px 32px;
  border-radius: 11px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  letter-spacing: 0.2px;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--gold-500) 0%, var(--gold-600) 100%);
  color: var(--navy-900);
  box-shadow: 0 6px 28px var(--gold-glow);
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 30%, rgba(255, 255, 255, 0.25) 50%, transparent 70%);
  background-size: 200% 100%;
  opacity: 0;
  transition: opacity 0.4s;
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(240, 165, 0, 0.5);
}
.btn-primary:hover::before {
  opacity: 1;
  animation: shimmer 1.2s linear;
}
.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(240, 165, 0, 0.08);
  transform: translateY(-2px);
}
.btn-block { width: 100%; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.hero-stats .stat {
  text-align: center;
  padding: 18px 10px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: var(--transition);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}
.hero-stats .stat::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.hero-stats .stat:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(240, 165, 0, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
}
.hero-stats .stat:hover::before { opacity: 1; }
.hero-stats .stat strong {
  display: block;
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 3px;
  letter-spacing: -0.5px;
}
.hero-stats .stat span {
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 600;
}

/* Hero Slider */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 560px;
}
.hero-slider {
  position: relative;
  width: 100%;
  max-width: 640px;
  height: 560px;
  overflow: hidden;
  border-radius: 20px;
  box-shadow:
    0 40px 90px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.06);
}
.hero-slides {
  position: relative;
  width: 100%;
  height: 100%;
}
.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.75s var(--ease), visibility 0.75s var(--ease);
  z-index: 0;
  background: radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.04), transparent 65%);
}
.hero-slide.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}
.hero-slide img {
  max-height: 530px;
  max-width: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 24px 55px rgba(0, 0, 0, 0.55));
  border-radius: 14px;
  transition: transform 0.6s var(--ease);
}
.hero-slide.active img {
  animation: float 6s ease-in-out infinite;
}
.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 9px;
  z-index: 12;
}
.hero-dots button {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: 0.3s var(--ease);
}
.hero-dots button.active {
  background: var(--accent);
  transform: scale(1.4);
  box-shadow: 0 0 14px rgba(240, 165, 0, 0.65);
}
.hero-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(3, 7, 18, 0.78);
  color: #fff;
  font-size: 1.55rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  cursor: pointer;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.82;
  transition: 0.3s var(--ease);
  backdrop-filter: blur(10px);
}
.hero-nav:hover {
  background: var(--accent);
  color: var(--navy-900);
  opacity: 1;
  box-shadow: 0 0 24px rgba(240, 165, 0, 0.45);
  transform: translateY(-50%) scale(1.08);
}
.hero-prev { right: 14px; }
.hero-next { left: 14px; }
html[lang="en"] .hero-prev { right: auto; left: 14px; }
html[lang="en"] .hero-next { left: auto; right: 14px; }

.hero-badge {
  position: absolute;
  bottom: 30px;
  left: 16px;
  background: linear-gradient(145deg, rgba(26, 58, 92, 0.92), rgba(3, 7, 18, 0.95));
  color: #fff;
  padding: 13px 18px;
  border-radius: 12px;
  border: 1px solid rgba(240, 165, 0, 0.38);
  text-align: center;
  z-index: 13;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
}
html[lang="en"] .hero-badge {
  left: auto;
  right: 16px;
}
.hero-badge span {
  display: block;
  font-size: 0.66rem;
  opacity: 0.68;
  letter-spacing: 1.6px;
  font-weight: 600;
}
.hero-badge strong {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
}

/* ============================================================
   7. TRUST BAR
   ============================================================ */
.trust-bar {
  background: linear-gradient(90deg, #030712 0%, #0a1422 50%, #030712 100%);
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  position: relative;
  overflow: hidden;
}
.trust-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(240, 165, 0, 0.04), transparent);
  animation: shimmer 8s linear infinite;
}
.trust-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 36px;
  position: relative;
  z-index: 1;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
  padding: 6px 0;
}
.trust-item:hover {
  color: var(--accent);
  transform: translateY(-2px);
}
.trust-item .icon {
  font-size: 1.28rem;
  filter: drop-shadow(0 0 8px rgba(240, 165, 0, 0.3));
}

/* ============================================================
   8. SECTIONS COMMON
   ============================================================ */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 64px;
}
.section-tag {
  display: inline-block;
  background: var(--gold-soft);
  color: var(--gold-600);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
  border: 1px solid rgba(240, 165, 0, 0.15);
}
.section-header h2 {
  font-size: clamp(1.7rem, 3.3vw, 2.55rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 18px;
  line-height: 1.32;
  letter-spacing: -0.4px;
}
.section-header h2 .highlight {
  color: var(--accent);
}
.section-desc {
  color: var(--text-muted);
  font-size: 1.08rem;
  line-height: 1.85;
}

/* ============================================================
   9. ABOUT
   ============================================================ */
.about {
  background: var(--bg-section-alt);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  position: relative;
}
.about-image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  background: var(--navy-800);
  position: relative;
  z-index: 1;
}
.about-image::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: calc(var(--radius-md) + 10px);
  border: 1px solid rgba(240, 165, 0, 0.22);
  z-index: 0;
  pointer-events: none;
}
.about-image::after {
  content: "";
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(240, 165, 0, 0.15), transparent 70%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}
html[lang="en"] .about-image::after {
  right: auto;
  left: -20px;
}
.about-content h3 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 800;
}
.about-content .lead {
  font-size: 1.14rem;
  color: var(--gold-600);
  font-weight: 700;
  margin-bottom: 20px;
}
.about-content p {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.85;
}
.highlight-card {
  background: var(--white);
  border-inline-start: 4px solid var(--accent);
  padding: 26px 30px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  margin-top: 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.highlight-card::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline-end: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(240, 165, 0, 0.08), transparent 70%);
  pointer-events: none;
}
.highlight-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.highlight-card strong {
  display: block;
  color: var(--primary);
  margin-bottom: 10px;
  font-size: 1.1rem;
  font-weight: 800;
}
.highlight-card p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================================
   10. CHALLENGES
   ============================================================ */
.challenges {
  background: var(--bg-dark);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.challenges::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(240, 165, 0, 0.06), transparent 70%);
  pointer-events: none;
}
.challenges .section-header h2,
.challenges .section-desc {
  color: var(--white);
}
.challenges .section-desc {
  opacity: 0.7;
}
.challenges .section-tag {
  background: rgba(240, 165, 0, 0.16);
  color: var(--accent);
  border-color: rgba(240, 165, 0, 0.25);
}
.challenges-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  position: relative;
  z-index: 1;
}
.challenge-card {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 34px 26px;
  transition: var(--transition);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}
.challenge-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.challenge-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(240, 165, 0, 0.35);
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.challenge-card:hover::before { opacity: 1; }
.challenge-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.9;
  letter-spacing: 1px;
  line-height: 1;
}
.challenge-card h4 {
  font-size: 1.14rem;
  margin-bottom: 12px;
  font-weight: 700;
}
.challenge-card p {
  font-size: 0.94rem;
  opacity: 0.7;
  line-height: 1.75;
}
.challenges-solution {
  text-align: center;
  margin-top: 52px;
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
  line-height: 1.75;
}
.challenges-solution strong {
  color: var(--accent);
}

/* ============================================================
   11. BENEFITS
   ============================================================ */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.benefit-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 30px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.benefit-card::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.benefit-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(240, 165, 0, 0.28);
}
.benefit-card:hover::before { opacity: 1; }
.benefit-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  display: inline-block;
  filter: drop-shadow(0 4px 12px rgba(240, 165, 0, 0.2));
  transition: var(--transition);
}
.benefit-card:hover .benefit-icon {
  transform: scale(1.1) translateY(-3px);
}
.benefit-card h4 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 800;
}
.benefit-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

/* ============================================================
   12. FEATURES
   ============================================================ */
.features {
  background: linear-gradient(168deg, #c8d4e6 0%, #d5e0ee 40%, #e4edf6 100%);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 68px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  inset-inline: 0;
  height: 0;
  background: linear-gradient(0deg, rgba(240, 165, 0, 0.06), transparent);
  transition: height 0.4s var(--ease);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.feature-card:hover::after {
  height: 60%;
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: inline-block;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  transform: scale(1.12);
}
.feature-card h4 {
  font-size: 1.14rem;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 800;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}
.feature-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 52px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(240, 165, 0, 0.12);
  position: relative;
  overflow: hidden;
}
.feature-showcase::before {
  content: "";
  position: absolute;
  top: -50%;
  inset-inline-end: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(240, 165, 0, 0.06), transparent 70%);
  pointer-events: none;
}
.showcase-text h3 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 30px;
  font-weight: 800;
}
.showcase-list li {
  margin-bottom: 22px;
  padding-inline-start: 18px;
  border-inline-start: 3px solid var(--accent);
  transition: var(--transition);
}
.showcase-list li:hover {
  transform: translateX(-4px);
}
html[lang="en"] .showcase-list li:hover {
  transform: translateX(4px);
}
.showcase-list strong {
  display: block;
  color: var(--primary);
  margin-bottom: 5px;
  font-size: 1.06rem;
  font-weight: 700;
}
.showcase-list span {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}
.showcase-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

/* ============================================================
   13. LED STATUS
   ============================================================ */
.led-status {
  background: linear-gradient(180deg, #c0cddf 0%, #d2deec 50%, #e4eef7 100%);
}
.led-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
}
.led-image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 560px;
  margin: 0 auto;
}
.led-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.led-table th {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-600) 100%);
  color: var(--white);
  padding: 17px 22px;
  text-align: start;
  font-size: 0.95rem;
  font-weight: 700;
}
.led-table td {
  padding: 15px 22px;
  border-bottom: 1px solid var(--border);
  font-size: 0.96rem;
  transition: background 0.2s;
}
.led-table tr:last-child td { border-bottom: none; }
.led-table tr:hover td {
  background: rgba(240, 165, 0, 0.05);
}
.led {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  margin-inline-end: 10px;
  vertical-align: middle;
  box-shadow: 0 0 10px currentColor;
}
.led.blue { background: #3b82f6; color: #3b82f6; }
.led.green { background: #10b981; color: #10b981; }
.led.red { background: #ef4444; color: #ef4444; }
.led.solid { box-shadow: 0 0 10px currentColor; }
.led.flash,
.led.flash-slow,
.led.flash-fast {
  animation: blink 1s infinite;
}
.led.flash-fast { animation-duration: 0.4s; }

/* ============================================================
   14. SPECS
   ============================================================ */
.specs {
  background: var(--bg-section-alt);
}
.specs-table-wrap {
  max-width: 840px;
  margin: 0 auto 60px;
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.specs-table td {
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  font-size: 1.02rem;
  transition: background 0.2s;
}
.specs-table td:first-child {
  font-weight: 700;
  color: var(--primary);
  width: 42%;
  background: rgba(3, 7, 18, 0.025);
}
.specs-table tr:last-child td { border-bottom: none; }
.specs-table tr:hover td {
  background: rgba(240, 165, 0, 0.04);
}
.specs-table tr:hover td:first-child {
  background: rgba(240, 165, 0, 0.07);
}

.install-steps {
  max-width: 940px;
  margin: 0 auto;
  text-align: center;
}
.install-steps h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 34px;
  font-weight: 800;
}
.steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.step {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 18px;
  width: 158px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}
.step:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 14px;
  font-size: 1.08rem;
  box-shadow: 0 4px 14px rgba(240, 165, 0, 0.35);
}
.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  font-weight: 600;
}

/* ============================================================
   15. COMPARISON
   ============================================================ */
.comparison-table-wrap {
  overflow-x: auto;
  margin-bottom: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  min-width: 740px;
}
.comparison-table th {
  padding: 18px 22px;
  text-align: start;
  font-size: 0.96rem;
  background: var(--navy-900);
  color: var(--white);
  font-weight: 700;
}
.comparison-table th.our {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
}
.comparison-table td {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  font-size: 0.94rem;
  vertical-align: middle;
  transition: background 0.2s;
}
.comparison-table td.our {
  background: rgba(240, 165, 0, 0.07);
  font-weight: 700;
  color: var(--primary);
}
.comparison-table td.win {
  color: var(--success);
  font-weight: 700;
  font-size: 0.9rem;
}
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:hover td {
  background: rgba(240, 165, 0, 0.03);
}
.comparison-table tr:hover td.our {
  background: rgba(240, 165, 0, 0.1);
}

.comparison-conclusion {
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
  font-size: 1.08rem;
  color: var(--text-light);
  background: var(--off-white);
  padding: 30px 38px;
  border-radius: var(--radius);
  border-inline-start: 4px solid var(--accent);
  line-height: 1.85;
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   16. APPLICATIONS
   ============================================================ */
.applications {
  background: linear-gradient(168deg, #c8d4e6 0%, #d8e3f0 50%, #e6eff7 100%);
}
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.app-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  border-top: 3px solid var(--accent);
  position: relative;
  overflow: hidden;
}
.app-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(240, 165, 0, 0.04));
  opacity: 0;
  transition: var(--transition);
}
.app-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(240, 165, 0, 0.3);
}
.app-card:hover::before { opacity: 1; }
.app-card h4 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 800;
  position: relative;
}
.app-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  position: relative;
}

/* ============================================================
   17. ROI
   ============================================================ */
.roi {
  background: linear-gradient(148deg, #030712 0%, #0a1422 45%, #1a3a5c 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.roi::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -10%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(240, 165, 0, 0.08), transparent 70%);
  pointer-events: none;
}
.roi .section-header h2 {
  color: var(--white);
}
.roi .section-tag {
  background: rgba(240, 165, 0, 0.16);
  color: var(--accent);
  border-color: rgba(240, 165, 0, 0.25);
}
.roi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 52px;
  position: relative;
  z-index: 1;
}
.roi-card {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}
.roi-card::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.roi-card:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(240, 165, 0, 0.42);
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.roi-card:hover::before { opacity: 1; }
.roi-value {
  font-size: 2.7rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 12px;
  line-height: 1.1;
  text-shadow: 0 0 36px rgba(240, 165, 0, 0.35);
  letter-spacing: -1px;
}
.roi-label {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.roi-card p {
  font-size: 0.88rem;
  opacity: 0.65;
}
.roi-benefits {
  max-width: 740px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.roi-benefits ul {
  display: grid;
  gap: 14px;
}
.roi-benefits li {
  background: rgba(255, 255, 255, 0.045);
  padding: 17px 24px;
  border-radius: var(--radius-sm);
  border-inline-start: 3px solid var(--accent);
  font-size: 1.03rem;
  opacity: 0.92;
  transition: var(--transition);
}
.roi-benefits li:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateX(-5px);
}
html[lang="en"] .roi-benefits li:hover {
  transform: translateX(5px);
}

/* ============================================================
   18. FAQ
   ============================================================ */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}
.faq-item::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 3px 0 0 3px;
  opacity: 0;
  transition: var(--transition);
}
html[lang="en"] .faq-item::before {
  border-radius: 0 3px 3px 0;
}
.faq-item:hover {
  border-color: rgba(240, 165, 0, 0.3);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.faq-item:hover::before { opacity: 1; }
.faq-item h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 800;
}
.faq-item p {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0;
  line-height: 1.8;
}

/* ============================================================
   19. CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.28fr;
  gap: 56px;
  align-items: start;
}
.contact-item {
  display: flex;
  gap: 18px;
  margin-bottom: 34px;
  align-items: flex-start;
  transition: var(--transition);
}
.contact-item:hover {
  transform: translateX(-4px);
}
html[lang="en"] .contact-item:hover {
  transform: translateX(4px);
}
.contact-icon {
  font-size: 1.7rem;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gold-soft);
  border-radius: 14px;
  flex-shrink: 0;
  border: 1px solid rgba(240, 165, 0, 0.2);
  transition: var(--transition);
}
.contact-item:hover .contact-icon {
  background: rgba(240, 165, 0, 0.2);
  box-shadow: 0 4px 16px rgba(240, 165, 0, 0.2);
}
.contact-item strong {
  display: block;
  color: var(--primary);
  margin-bottom: 5px;
  font-size: 0.95rem;
  font-weight: 700;
}
.contact-item a,
.contact-item span {
  display: block;
  color: var(--text-light);
  font-size: 1.08rem;
  font-weight: 600;
}
.contact-item a:hover {
  color: var(--accent);
}

.contact-form {
  background: linear-gradient(152deg, #eef3f9 0%, #dce6f2 100%);
  padding: 44px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(240, 165, 0, 0.1);
  position: relative;
  overflow: hidden;
}
.contact-form::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.form-group {
  margin-bottom: 22px;
}
.form-group label {
  display: block;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  font-size: 0.94rem;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1.02rem;
  background: var(--white);
  transition: var(--transition);
  color: var(--text);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(240, 165, 0, 0.14);
}
.form-group textarea {
  resize: vertical;
  min-height: 110px;
}
.form-note {
  margin-top: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
}

/* ============================================================
   20. FOOTER
   ============================================================ */
.site-footer {
  background: linear-gradient(180deg, #030712 0%, #060d18 100%);
  color: rgba(255, 255, 255, 0.8);
  padding: 75px 0 0;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  inset-inline: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240, 165, 0, 0.3), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr;
  gap: 52px;
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-brand .logo {
  margin-bottom: 20px;
}
.footer-brand p {
  font-size: 0.98rem;
  margin-bottom: 10px;
  opacity: 0.75;
  line-height: 1.7;
}
.footer-tagline {
  color: var(--accent) !important;
  font-weight: 700;
  font-size: 0.92rem !important;
}
.footer-links h5,
.footer-contact h5 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 20px;
  font-weight: 800;
}
.footer-links a {
  display: block;
  padding: 6px 0;
  opacity: 0.7;
  font-size: 0.96rem;
  font-weight: 600;
  transition: var(--transition);
}
.footer-links a:hover {
  opacity: 1;
  color: var(--accent);
  transform: translateX(-5px);
}
html[lang="en"] .footer-links a:hover {
  transform: translateX(5px);
}
.footer-contact p {
  margin-bottom: 9px;
  font-size: 0.96rem;
  opacity: 0.75;
  font-weight: 600;
}
.footer-bottom {
  padding: 26px 0;
  text-align: center;
  font-size: 0.88rem;
  opacity: 0.5;
}
.footer-bottom p {
  margin-bottom: 5px;
}

/* ============================================================
   21. BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  left: 32px;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  border-radius: 50%;
  font-size: 1.4rem;
  font-weight: 800;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(240, 165, 0, 0.45);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
}
html[lang="en"] .back-to-top {
  left: auto;
  right: 32px;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  transform: translateY(-5px);
  box-shadow: 0 14px 36px rgba(240, 165, 0, 0.55);
}

/* ============================================================
   22. RESPONSIVE — TABLET & BELOW
   ============================================================ */
@media (max-width: 1100px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 44px;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
    color: rgba(255, 255, 255, 0.8);
  }
  .hero-actions { justify-content: center; }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    max-width: 440px;
    margin: 0 auto;
  }
  .hero-image { order: -1; }
  .hero-slider {
    height: 440px;
    max-width: 500px;
  }
  .hero-slide img { max-height: 420px; }
  .about-grid,
  .feature-showcase,
  .led-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .challenges-grid,
  .roi-grid,
  .apps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .section {
    --section-pad: 85px;
  }
}

/* ============================================================
   COMPLETE MOBILE HEADER + MENU FIX (Final Perfect Version)
   جایگزین کامل بخش‌های موبایل هدر و منو
   ============================================================ */

@media (max-width: 768px) {

  /* ----- Header Layout ----- */
  .header-inner {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    height: 100% !important;
    gap: 8px !important;
  }

  .logo {
    flex-shrink: 1;
    min-width: 0;
  }

  .logo-icon img {
    height: 42px !important;
  }

  .logo-text strong {
    font-size: 0.95rem;
  }

  .logo-text small {
    font-size: 0.58rem;
  }

  .header-right {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
  }

  /* ----- Language Switcher (always visible) ----- */
  .lang-switch {
    display: flex !important;
    align-items: center !important;
    gap: 2px !important;
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.18) !important;
    border-radius: 50px !important;
    padding: 2px !important;
    margin: 0 !important;
    flex-shrink: 0 !important;
  }

  .lang-btn {
    padding: 5px 10px !important;
    font-size: 0.72rem !important;
    min-width: 34px !important;
    letter-spacing: 0.3px;
    border-radius: 50px;
  }

  /* ----- Hamburger Button (always visible) ----- */
  .mobile-toggle {
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    gap: 5px !important;
    background: transparent !important;
    border: none !important;
    cursor: pointer !important;
    padding: 8px !important;
    margin: 0 !important;
    flex-shrink: 0 !important;
    z-index: 1001;
  }

  .mobile-toggle span {
    display: block !important;
    width: 22px !important;
    height: 2.5px !important;
    background: #ffffff !important;
    border-radius: 2px !important;
    transition: 0.3s ease !important;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
  }
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .mobile-toggle.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
  }

  /* ----- Mobile Navigation Menu ----- */
  .main-nav {
    position: fixed !important;
    top: var(--header-h) !important;
    right: 0 !important;
    left: 0 !important;
    width: 100% !important;
    max-height: calc(100vh - var(--header-h)) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    background: rgba(3, 7, 18, 0.98) !important;
    backdrop-filter: blur(24px) !important;
    -webkit-backdrop-filter: blur(24px) !important;
    padding: 12px 0 32px !important;
    transform: translateY(-120%) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5) !important;
    z-index: 999 !important;
  }

  .main-nav.open {
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  /* Force vertical list */
  .main-nav ul {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 2px !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 16px !important;
    list-style: none !important;
  }

  .main-nav li {
    width: 100% !important;
    display: block !important;
  }

  .main-nav a {
    display: block !important;
    width: 100% !important;
    padding: 14px 18px !important;
    font-size: 1.08rem !important;
    color: rgba(255, 255, 255, 0.9) !important;
    border-radius: 10px !important;
    text-align: right !important;
    white-space: normal !important;
    line-height: 1.45 !important;
    background: transparent !important;
  }

  html[lang="en"] .main-nav a {
    text-align: left !important;
  }

  .main-nav a:hover,
  .main-nav a.active {
    background: rgba(240, 165, 0, 0.12) !important;
    color: #f0a500 !important;
  }

  .main-nav .btn-nav {
    margin: 14px 0 0 !important;
    text-align: center !important;
    background: linear-gradient(135deg, #f0a500, #d99400) !important;
    color: #030712 !important;
    font-weight: 800 !important;
    border-radius: 10px !important;
  }

  .main-nav .btn-nav:hover {
    background: linear-gradient(135deg, #ffc933, #f0a500) !important;
    color: #030712 !important;
  }
}

/* Very small screens */
@media (max-width: 380px) {
  .logo-text {
    display: none !important;
  }
  .lang-btn {
    padding: 4px 8px !important;
    font-size: 0.68rem !important;
    min-width: 30px !important;
  }
}

/* Extra small phones */
@media (max-width: 380px) {

  .logo-text {
    display: none; /* فقط لوگو تصویری بماند تا جا باز شود */
  }

  .lang-btn {
    padding: 4px 8px;
    font-size: 0.68rem;
    min-width: 30px;
  }

  .mobile-toggle {
    padding: 6px;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-stats .stat strong { font-size: 1.18rem; }
  .roi-value { font-size: 2.1rem; }
  .step { width: 100%; }
  .trust-items { gap: 16px; }
  .trust-item { font-size: 0.84rem; }
  .logo-text strong { font-size: 1.05rem; }
  .btn {
    padding: 13px 24px;
    font-size: 0.95rem;
  }
  .container { padding: 0 18px; }
  .section-header { margin-bottom: 44px; }
}

/* ============================================================
   23. PRINT & ACCESSIBILITY
   ============================================================ */
@media print {
  .site-header,
  .back-to-top,
  #preloader,
  .hero-nav,
  .hero-dots,
  .mobile-toggle {
    display: none !important;
  }
  body {
    background: white;
    color: black;
  }
  .section {
    padding: 30px 0;
    page-break-inside: avoid;
  }
}

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