/* ============================================
   DAWA.AI - Layout Styles
   Premium Layout System
   ============================================ */

/* ========== Preloader ========== */

.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-preloader);
  transition: opacity 0.5s ease, visibility 0.5s ease;
  /* Fallback: auto-hide after 3 seconds if JS fails (important for WeChat browser) */
  animation: preloaderAutoHide 0.5s ease forwards 3s;
}

/* Fallback animation to hide preloader if JS doesn't execute */
@keyframes preloaderAutoHide {
  to {
    opacity: 0;
    visibility: hidden;
  }
}

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

.preloader-inner {
  text-align: center;
}

.preloader-logo {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 32px;
}

.preloader-logo .logo-text {
  font-size: 3rem;
  font-weight: var(--font-black);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.preloader-logo .logo-dot {
  font-size: 2rem;
  font-weight: var(--font-bold);
  color: var(--color-primary-400);
}

.preloader-bar {
  width: 200px;
  height: 4px;
  background: var(--glass-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 16px;
}

.preloader-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  animation: preloaderProgress 2s ease forwards;
}

.preloader-text {
  font-size: var(--font-sm);
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* ========== Navigation - Refined & Compact ========== */

.glass-nav {
  background: transparent;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: 10px 0;
  transition: all var(--transition-normal);
}

.glass-nav.scrolled {
  background: rgba(5, 8, 16, 0.92);
  border-bottom-color: var(--glass-border-light);
  padding: 6px 0;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 212, 255, 0.05);
}

.navbar-brand {
  display: flex;
  align-items: center;
}

.brand-logo-wrapper {
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 55px;
  width: auto;
  object-fit: contain;
}

.brand-icon {
  width: 36px;
  height: 36px;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.brand-name {
  font-size: var(--font-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-suffix {
  font-size: 0.6875rem;
  font-weight: var(--font-semibold);
  color: var(--color-accent-400);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: var(--font-medium);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  position: relative;
  letter-spacing: 0.01em;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
  transition: width var(--transition-normal);
  border-radius: var(--radius-full);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--glass-bg-light);
}

.nav-link:hover::before {
  width: 70%;
}

.nav-link.active {
  color: var(--color-accent-400) !important;
  background: var(--glass-bg-strong);
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
  font-weight: var(--font-semibold);
}

.nav-link.active::before {
  width: 70%;
}

.nav-cta {
  margin-left: 12px;
}

.toggler-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: all var(--transition-normal);
}

.toggler-icon::before,
.toggler-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--text-primary);
  left: 0;
  transition: all var(--transition-normal);
}

.toggler-icon::before {
  top: -8px;
}

.toggler-icon::after {
  top: 8px;
}

.navbar-toggler:focus {
  box-shadow: none;
}

/* ========== Hero Section - Future Tech ========== */

.hero-section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 90px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-hero);
}

.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.5;
  animation: gridPulse 8s ease-in-out infinite;
}

@keyframes gridPulse {

  0%,
  100% {
    opacity: 0.5;
    transform: translateY(0);
  }

  50% {
    opacity: 0.3;
    transform: translateY(10px);
  }
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.3;
}

.hero-line {
  position: absolute;
  width: 100%;
  height: 100%;
}

.hero-line-2 {
  opacity: 0.2;
}

.line-path {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: lineDraw 3s ease forwards;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--glass-bg-strong);
  border: 1px solid var(--color-accent-400);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.25), inset 0 0 15px rgba(0, 212, 255, 0.05);
  backdrop-filter: var(--glass-blur);
}

.badge-icon {
  color: var(--color-accent-400);
  animation: badgePulse 2s ease-in-out infinite;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

@keyframes badgePulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.7;
    transform: scale(0.95);
  }
}

.badge-text {
  font-size: var(--font-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.hero-title {
  margin-bottom: 24px;
}

.title-line {
  font-size: clamp(42px, 5vw, var(--font-7xl));
  font-weight: var(--font-black);
  line-height: var(--line-tight);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  letter-spacing: -0.04em;
  filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
}

.title-sub {
  font-size: var(--font-sm);
  font-weight: var(--font-medium);
  color: var(--color-accent-400);
  display: block;
  margin-top: 16px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.9;
}

.hero-description {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  line-height: var(--line-relaxed);
  margin-bottom: 36px;
  max-width: 650px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-bottom: 48px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: var(--font-4xl);
  font-weight: var(--font-bold);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.3));
}

.stat-label {
  font-size: var(--font-xs);
  color: var(--text-muted);
  margin-top: 6px;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent 0%, var(--color-accent-400) 50%, transparent 100%);
  opacity: 0.3;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Hero Visual Card - Enhanced */
.hero-visual {
  position: relative;
}

.visual-card {
  background: var(--glass-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius-2xl);
  padding: 28px;
  box-shadow: var(--glow-card), inset 0 0 30px rgba(0, 212, 255, 0.03);
  position: relative;
  overflow: hidden;
}

.visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-400) 50%, transparent 100%);
  opacity: 0.5;
}

.visual-card:hover {
  box-shadow: var(--glow-card-hover), inset 0 0 50px rgba(0, 212, 255, 0.05);
  border-color: var(--color-accent-400);
}

.visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.visual-title {
  font-size: var(--font-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.visual-badge {
  background: var(--gradient-neon);
  color: #050810;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.05em;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.visual-content {
  margin-bottom: 24px;
}

.workflow-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 8px;
  font-size: var(--font-xs);
  color: var(--text-muted);
  transition: all var(--transition-normal);
  border-radius: var(--radius-md);
}

.flow-node i {
  font-size: var(--font-lg);
  color: var(--color-primary-400);
  transition: all var(--transition-normal);
}

.flow-node.active {
  color: var(--text-primary);
  background: var(--glass-bg-light);
}

.flow-node.active i {
  color: var(--color-accent-400);
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

.flow-line {
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
  opacity: 0.5;
  border-radius: var(--radius-full);
}

.visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.progress-mini {
  width: 60%;
  height: 4px;
  background: var(--glass-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.progress-mini-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.visual-status {
  font-size: var(--font-xs);
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* Scroll Indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-text {
  font-size: var(--font-xs);
  color: var(--text-muted);
  margin-bottom: 8px;
}

.scroll-icon {
  color: var(--color-primary-400);
  font-size: var(--font-lg);
}

/* ========== Section Layout - Enhanced ========== */

section {
  position: relative;
  padding: var(--section-padding) 0;
}

.section-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.bg-gradient-radial {
  background: radial-gradient(ellipse at 50% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
}

.bg-mesh {
  background: var(--gradient-mesh);
  opacity: 0.4;
}

.bg-timeline {
  background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.03) 50%, transparent 100%);
}

.bg-noise {
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.bg-gradient-contact {
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 255, 0.08) 0%, transparent 50%);
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
  position: relative;
}

.section-tag {
  display: inline-block;
  background: var(--glass-bg-strong);
  border: 1px solid var(--color-accent-400);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: var(--font-semibold);
  color: var(--color-accent-400);
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
  text-transform: uppercase;
}

.section-title {
  font-size: var(--font-5xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: var(--font-lg);
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
  line-height: var(--line-relaxed);
}

/* ========== Grid Layouts ========== */

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

/* ========== FilmOS Comparison - Enhanced ========== */

.filmos-comparison {
  margin-bottom: 48px;
}

.comparison-wrapper {
  display: grid;
  /* grid-template-columns: 1fr auto 1fr; */
  grid-template-columns: 2fr 1fr 2fr;
  gap: 32px;
  align-items: center;
  /* max-width: calc(100% - 200px); */
  margin: 0 auto;
}

.comparison-side {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  max-width: 500px;
}

.comparison-side::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-400) 50%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.comparison-side:hover {
  border-color: var(--color-accent-400);
  box-shadow: var(--glow-card-hover);
  transform: translateY(-4px);

}

.comparison-side:hover::before {
  opacity: 0.5;
}

.comparison-side.filmos {
  border-color: var(--color-accent-400);
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.08) 0%, var(--glass-bg-card) 100%);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
}

.comparison-side.filmos::before {
  opacity: 1;
}

.side-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.side-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: #050810;
  font-size: var(--font-xl);
  margin-bottom: 20px;
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.4);
}

.comparison-side.filmos .side-icon {
  background: var(--gradient-primary);
  color: #050810;
  border: none;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.side-title {
  font-size: var(--font-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.process-line {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.process-step {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-normal);
}

.process-step:last-child {
  border-bottom: none;
}

.process-step:hover {
  padding-left: 8px;
  background: var(--glass-bg-light);
  margin: 0 -8px;
  padding: 10px 8px;
  border-radius: var(--radius-md);
}

.step-name {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  transition: color var(--transition-normal);
}

.step-time {
  font-size: var(--font-xs);
  color: var(--text-muted);
  font-weight: var(--font-medium);
}

.process-step.active .step-name {
  color: var(--text-primary);
  font-weight: var(--font-semibold);
}

.process-step.active .step-time {
  color: var(--color-accent-400);
  font-weight: var(--font-semibold);
}

.side-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  background: var(--bg-dark-secondary);
  border-radius: var(--radius-lg);
  margin-top: 20px;
  border: 1px solid var(--glass-border);
  position: relative;
  z-index: 1;
}

.summary-label {
  font-size: var(--font-sm);
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.summary-value {
  font-size: var(--font-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.summary-value.highlight {
  color: var(--color-accent-400);
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.4));
}

.filmos-benefits {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
  position: relative;
  z-index: 1;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.4;
}

.benefit-item i {
  color: var(--color-accent-400);
  filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.4));
}

.comparison-divider {
  display: flex;
  align-items: center;
  justify-content: center;
}

.vs-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 50%;
  color: #050810;
  font-size: var(--font-lg);
  font-weight: var(--font-bold);
  box-shadow: var(--glow-primary), 0 0 20px rgba(0, 212, 255, 0.3);
}

.filmos-output {
  margin-top: 48px;
}

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

.output-card {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.output-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-400) 50%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.output-card:hover {
  border-color: var(--color-accent-400);
  box-shadow: var(--glow-card-hover);
  transform: translateY(-4px);
}

.output-card:hover::before {
  opacity: 0.5;
}

.output-card.featured {
  border-color: var(--color-accent-400);
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.08) 0%, var(--glass-bg-card) 100%);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
}

.output-card.featured::before {
  opacity: 0.5;
}

.output-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: #050810;
  font-size: var(--font-xl);
  margin-bottom: 20px;
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.4);
}

.output-title {
  font-size: var(--font-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.output-desc {
  font-size: var(--font-sm);
  color: var(--color-accent-400);
  margin-bottom: 16px;
  line-height: var(--line-relaxed);
}

.output-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.output-list li {
  padding: 10px 0;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--glass-border);
  text-align: center;
  /* display: flex;
  align-items: center;
  gap: 10px; */
}

/* .output-list li::before {
  content: '▸';
  color: var(--color-accent-400);
  font-size: var(--font-sm);
} */

.output-list li:last-child {
  border-bottom: none;
}

.output-card .output-list-item-content::before {
  content: '▸';
  color: var(--color-accent-400);
  font-size: var(--font-sm);
}

.output-card .output-list-item-content {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-align: left;
  width: 116px;
}

/* ========== Key Projects ========== */

.key-projects {
  margin-top: 64px;
  text-align: center;
}

.projects-title {
  font-size: var(--font-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

/* ========== Works Grid ========== */

/* ========== Works Grid - 竖向图片优化布局 ========== */

.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* 移除大卡片特殊布局，所有卡片统一处理 */

/* ========== Contact Grid ========== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-form-wrapper {
  flex: 1;
}

.contact-form {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: 40px;
  border: 1px solid var(--glass-border-light);
  box-shadow: var(--glow-card);
}

.form-title {
  font-size: var(--font-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

/* ========== Footer - Enhanced ========== */

.footer {
  background: var(--bg-dark-secondary);
  border-top: 1px solid var(--glass-border);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-400) 50%, transparent 100%);
  opacity: 0.3;
}

.footer-top {
  padding: 64px 0 32px;
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.footer-brand .brand-name {
  font-size: var(--font-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-desc {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: var(--line-relaxed);
}

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

.footer-title {
  font-size: var(--font-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list li a {
  font-size: var(--font-sm);
  color: var(--text-muted);
  transition: color var(--transition-normal), text-shadow var(--transition-normal);
}

.footer-list li a:hover {
  color: var(--color-accent-400);
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.footer-bottom {
  padding: 24px 0;
  border-top: 1px solid var(--glass-border);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.copyright {
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: var(--font-base);
  transition: all var(--transition-normal);
  position: relative;
}

.social-link:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #050810;
  box-shadow: var(--glow-primary);
  transform: translateY(-3px);
}

/* ========== Back to Top - Enhanced ========== */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  color: #050810;
  font-size: var(--font-lg);
  font-weight: var(--font-bold);
  box-shadow: var(--glow-primary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: var(--z-fixed);
}

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

.back-to-top:hover {
  transform: translateY(-6px);
  box-shadow: var(--glow-primary-strong);
}