/* ============================================
   TRX闪租 - Mobile-First Responsive Styles
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-card-hover: #1f2847;
  --accent-cyan: #00d4ff;
  --accent-blue: #0066ff;
  --accent-purple: #7c3aed;
  --accent-green: #10b981;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(0, 212, 255, 0.12);
  --border-glow: rgba(0, 212, 255, 0.3);
  --gradient-main: linear-gradient(135deg, #00d4ff, #0066ff);
  --gradient-purple: linear-gradient(135deg, #7c3aed, #0066ff);
  --gradient-card: linear-gradient(145deg, rgba(26, 32, 53, 0.8), rgba(17, 24, 39, 0.9));
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --container-padding: 20px;
  --section-padding: 60px 0;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--accent-blue);
}

ul, ol {
  list-style: none;
}

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

/* --- Utility --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  padding: 6px 16px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 100px;
}

.section-label .icon-label {
  width: 16px;
  height: 16px;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

/* --- SVG Icon System --- */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon svg {
  width: 100%;
  height: 100%;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

.icon-label {
  width: 16px;
  height: 16px;
  color: var(--accent-cyan);
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.2); }
  50% { box-shadow: 0 0 40px rgba(0, 212, 255, 0.4); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  z-index: 1001;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
}

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

.nav-links {
  display: none;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: var(--transition);
}

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

.nav-cta {
  display: none;
}

.nav-cta-btn {
  padding: 10px 24px;
  background: var(--gradient-main);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  border-radius: 100px;
  transition: var(--transition);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-cta-btn .icon-sm {
  color: #fff;
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* Hamburger Menu */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

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

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

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

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 26, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.mobile-menu a:hover {
  color: var(--accent-cyan);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 60px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

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

.hero-bg canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.3) 0%, rgba(10, 14, 26, 0.8) 70%, var(--bg-primary) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease forwards;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: 32px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease 0.1s forwards;
  opacity: 0;
}

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

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.6s ease 0.2s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  animation: fadeInUp 0.6s ease 0.3s forwards;
  opacity: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 36px;
  background: var(--gradient-main);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  border-radius: 100px;
  transition: var(--transition);
  min-height: 52px;
  width: 100%;
  max-width: 320px;
  position: relative;
  overflow: hidden;
}

.btn-primary .icon-sm {
  color: #fff;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0, 212, 255, 0.35);
  color: #fff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 36px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 16px;
  border-radius: 100px;
  border: 1px solid var(--border-glow);
  transition: var(--transition);
  min-height: 52px;
  width: 100%;
  max-width: 320px;
}

.btn-secondary .icon-sm {
  color: var(--accent-cyan);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  animation: fadeInUp 0.6s ease 0.4s forwards;
  opacity: 0;
}

.hero-stat-value {
  font-size: 24px;
  font-weight: 800;
  font-family: var(--font-mono);
}

.hero-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================
   STATS BAR
   ============================================ */
.stats-bar {
  padding: 40px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 16px 8px;
}

.stat-number {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.stat-text {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
  padding: var(--section-padding);
}

.how-it-works .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.how-it-works .section-desc {
  margin: 0 auto;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
}

.step-card {
  position: relative;
  padding: 28px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
}

.step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  opacity: 0;
  transition: var(--transition);
}

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

.step-card:hover::before {
  opacity: 1;
}

.step-icon-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.step-number {
  width: 44px;
  height: 44px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.step-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-cyan);
  opacity: 0.7;
}

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

.step-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   FEATURES
   ============================================ */
.features {
  padding: var(--section-padding);
  background: var(--bg-secondary);
}

.features .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.features .section-desc {
  margin: 0 auto;
}

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

.feature-card {
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  text-align: center;
}

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

.feature-icon-badge {
  width: 48px;
  height: 48px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: -36px auto 16px;
  position: relative;
  z-index: 1;
  color: var(--accent-cyan);
  backdrop-filter: blur(8px);
}

.feature-icon-badge .icon {
  width: 24px;
  height: 24px;
}

.feature-icon {
  width: 100%;
  max-width: 200px;
  margin: 0 auto 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.feature-icon img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.feature-emoji-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   PRICING
   ============================================ */
.pricing {
  padding: var(--section-padding);
}

.pricing .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.pricing .section-desc {
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  padding: 32px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.pricing-card.popular {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.pricing-card.popular::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
}

.pricing-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 14px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
}

.pricing-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.pricing-price {
  font-size: 36px;
  font-weight: 800;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.pricing-price .unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.pricing-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-feature .check {
  width: 20px;
  height: 20px;
  background: rgba(16, 185, 129, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-green);
  flex-shrink: 0;
}

.pricing-feature .check .icon {
  width: 12px;
  height: 12px;
}

.pricing-btn {
  display: block;
  width: 100%;
  padding: 14px;
  text-align: center;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
  min-height: 48px;
}

.pricing-btn-primary {
  background: var(--gradient-main);
  color: #fff;
}

.pricing-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
  color: #fff;
}

.pricing-btn-secondary {
  background: transparent;
  border: 1px solid var(--border-glow);
  color: var(--text-primary);
}

.pricing-btn-secondary:hover {
  background: rgba(0, 212, 255, 0.08);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

/* Pricing wrapper for config panel */
.pricing-wrapper {
  display: flex;
  flex-direction: column;
}

/* Config Panel */
.pricing-config-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}

.pricing-config-panel.active {
  max-height: 500px;
  opacity: 1;
}

.pricing-config-content {
  margin-top: 16px;
  padding: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
}

.config-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.config-header h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.config-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.config-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.config-body {
  margin-bottom: 20px;
}

.config-field {
  margin-bottom: 20px;
}

.config-field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.config-slider-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}

.config-slider {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-tertiary);
  border-radius: 3px;
  outline: none;
}

.config-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--gradient-main);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 212, 255, 0.4);
}

.config-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--gradient-main);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 212, 255, 0.4);
}

.config-value {
  min-width: 60px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-align: right;
}

.config-summary {
  padding: 16px;
  background: rgba(0, 212, 255, 0.05);
  border-radius: 12px;
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.summary-row:first-child {
  padding-top: 0;
}

.summary-row:last-child {
  padding-bottom: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 8px;
  padding-top: 12px;
}

.summary-row span:first-child {
  font-size: 14px;
  color: var(--text-secondary);
}

.summary-total {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.summary-saving {
  font-size: 16px;
  font-weight: 700;
}

.config-submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  background: var(--gradient-main);
  color: #fff;
  border: none;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.config-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

/* ============================================
   SAVINGS CALCULATOR
   ============================================ */
.calculator {
  padding: var(--section-padding);
  background: var(--bg-secondary);
}

.calculator .section-header {
  text-align: center;
  margin-bottom: 40px;
}

.calculator .section-desc {
  margin: 0 auto;
}

.calc-box {
  max-width: 500px;
  margin: 0 auto;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.calc-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.calc-row:last-child {
  border-bottom: none;
  padding-top: 20px;
  margin-top: 4px;
  border-top: 2px solid var(--border-glow);
}

.calc-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.calc-value {
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.calc-value.savings {
  color: var(--accent-green);
  font-size: 22px;
}

/* ============================================
   FAQ
   ============================================ */
.faq {
  padding: var(--section-padding);
}

.faq .section-header {
  text-align: center;
  margin-bottom: 48px;
}

.faq .section-desc {
  margin: 0 auto;
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--border-glow);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  min-height: 56px;
  transition: var(--transition);
  gap: 16px;
}

.faq-question:hover {
  color: var(--accent-cyan);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-icon .icon {
  width: 16px;
  height: 16px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(0, 212, 255, 0.15);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
  max-height: 400px;
}

.faq-answer-content {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-content {
  position: relative;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 48px 0 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.footer-brand-name .nav-logo-icon {
  width: 32px;
  height: 32px;
  padding: 5px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
  min-height: 32px;
  display: flex;
  align-items: center;
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

.footer-copyright {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-social-link {
  width: 40px;
  height: 40px;
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  min-width: 44px;
  min-height: 44px;
}

.footer-social-link .icon {
  width: 18px;
  height: 18px;
}

.footer-social-link:hover {
  background: rgba(0, 212, 255, 0.12);
  border-color: var(--border-glow);
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

/* ============================================
   RESPONSIVE - TABLET (≥640px)
   ============================================ */
@media (min-width: 640px) {
  :root {
    --container-padding: 32px;
    --section-padding: 80px 0;
  }

  .section-title {
    font-size: 34px;
  }

  .hero-title {
    font-size: 40px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .btn-primary, .btn-secondary {
    width: auto;
  }

  .hero-stat-value {
    font-size: 30px;
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .stat-number {
    font-size: 32px;
  }

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

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

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

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

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .cta-title {
    font-size: 34px;
  }
}

/* ============================================
   RESPONSIVE - DESKTOP (≥1024px)
   ============================================ */
@media (min-width: 1024px) {
  :root {
    --container-padding: 48px;
    --section-padding: 100px 0;
  }

  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: block;
  }

  .hamburger {
    display: none;
  }

  .section-title {
    font-size: 40px;
  }

  .hero {
    padding: 120px 0 80px;
  }

  .hero-title {
    font-size: 52px;
  }

  .hero-subtitle {
    font-size: 19px;
  }

  .hero-stat-value {
    font-size: 36px;
  }

  .hero-stat-label {
    font-size: 14px;
  }

  .stat-number {
    font-size: 36px;
  }

  .steps-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 800px;
    margin: 0 auto;
  }

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

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

  .cta-title {
    font-size: 40px;
  }

  .cta-actions {
    flex-direction: row;
    justify-content: center;
  }
}

/* ============================================
   RESPONSIVE - LARGE DESKTOP (≥1280px)
   ============================================ */
@media (min-width: 1280px) {
  .hero-title {
    font-size: 60px;
  }

  .features-grid {
    max-width: 1000px;
  }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ============================================
   SELECTION
   ============================================ */
::selection {
  background: rgba(0, 212, 255, 0.25);
  color: var(--text-primary);
}

/* ============================================
   LEASE MODAL
   ============================================ */
.lease-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.lease-modal.active {
  opacity: 1;
  pointer-events: all;
}

.lease-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.lease-modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  max-width: 360px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lease-modal-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  border: 3px solid rgba(0, 212, 255, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.lease-modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.lease-modal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.lease-modal-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--accent-primary);
}

.lease-modal-separator {
  color: var(--text-muted);
}

.lease-modal-close {
  width: 100%;
  padding: 12px 24px;
  background: transparent;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lease-modal-close:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

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

  .animate-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  #particle-canvas {
    display: none;
  }
}

/* ============================================
   LANGUAGE SWITCHER
   ============================================ */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.lang-btn .lang-flag {
  font-size: 1.1rem;
}

.lang-btn .lang-name {
  font-weight: 500;
}

.lang-btn .lang-arrow {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s;
  z-index: 1001;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

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

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.lang-option:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.lang-option.active {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent-primary);
}

.lang-option .lang-flag {
  font-size: 1.2rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-lang-switcher {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.mobile-lang-switcher .lang-btn {
  width: 100%;
  justify-content: center;
}

.mobile-lang-switcher .lang-dropdown {
  position: static;
  opacity: 1;
  visibility: visible;
  transform: none;
  margin-top: 12px;
  box-shadow: none;
  border: 1px solid var(--border);
}

@media (max-width: 1023px) {
  .nav-right {
    display: none;
  }
  
  .nav-right .lang-switcher {
    display: none;
  }
}