:root {
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a25;
  --color-bg-card: #16161f;
  --color-bg-card-hover: #1e1e2a;
  --color-bg-glass: rgba(22, 22, 31, 0.85);
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);
  --color-border-accent: rgba(255, 0, 122, 0.3);
  --color-text-primary: #ffffff;
  --color-text-secondary: #b0b0c0;
  --color-text-muted: #6a6a7a;
  --color-accent-primary: #ff007a;
  --color-accent-secondary: #ff4da6;
  --color-accent-gradient: linear-gradient(135deg, #ff007a 0%, #ff4da6 50%, #ff77c7 100%);
  --color-accent-glow: rgba(255, 0, 122, 0.4);
  --color-success: #00d68f;
  --color-warning: #ffaa00;
  --color-error: #ff3d71;
  --color-info: #0095ff;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Exo 2', 'Space Grotesk', var(--font-primary);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px var(--color-accent-glow);
  --shadow-glow-sm: 0 0 20px var(--color-accent-glow);
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  overscroll-behavior: none;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: clip;
  overscroll-behavior: none;
  margin: 0;
  padding: 0;
  border: 0;
}

main {
  display: block;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(255, 0, 122, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(255, 77, 166, 0.08), transparent);
  pointer-events: none;
  z-index: -1;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-2xl { max-width: var(--container-2xl); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-glow-sm);
}

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

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

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

.btn-outline:hover {
  background: rgba(255, 0, 122, 0.1);
  box-shadow: var(--shadow-glow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

.btn-icon {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

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

.card-glow:hover {
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-glow-sm);
}

.card-header {
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.badge-primary {
  background: rgba(255, 0, 122, 0.15);
  color: var(--color-accent-primary);
  border-color: rgba(255, 0, 122, 0.3);
}

.badge-success {
  background: rgba(0, 214, 143, 0.15);
  color: var(--color-success);
  border-color: rgba(0, 214, 143, 0.3);
}

.badge-warning {
  background: rgba(255, 170, 0, 0.15);
  color: var(--color-warning);
  border-color: rgba(255, 170, 0, 0.3);
}

.badge-error {
  background: rgba(255, 61, 113, 0.15);
  color: var(--color-error);
  border-color: rgba(255, 61, 113, 0.3);
}

.input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.input:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(255, 0, 122, 0.15);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.input-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  padding: var(--spacing-md) 0;
  background: transparent;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.02);
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
}

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

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-item {
  position: relative;
}

.nav-item.has-mega-menu .nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}

.mobile-menu-toggle {
  display: none;
}

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

.lang-select {
  position: relative;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  white-space: nowrap;
}

.lang-toggle:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.lang-toggle svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.lang-toggle:hover svg {
  opacity: 1;
}

.lang-toggle .lang-arrow {
  width: 12px;
  height: 12px;
  opacity: 0.5;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.lang-select.open .lang-toggle .lang-arrow {
  transform: rotate(180deg);
  opacity: 0.8;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--color-bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 6px;
  display: none;
  z-index: 100;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.lang-select.open .lang-dropdown {
  display: block;
}

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

.lang-option:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.lang-option.active {
  color: var(--color-accent-primary);
  background: rgba(255, 0, 122, 0.08);
}

.lang-option .lang-flag {
  font-size: 18px;
  line-height: 1;
}

.lang-option .lang-code {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-left: auto;
  text-transform: uppercase;
}

.mobile-menu-btn {
  display: none;
  padding: var(--spacing-sm);
  color: var(--color-text-primary);
}

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

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

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

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

.footer-social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  color: var(--color-accent-primary);
  background: rgba(255, 0, 122, 0.1);
}

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

.text-glow {
  text-shadow: 0 0 40px var(--color-accent-glow);
}

/* Glitch 艺术字效果 */
.glitch-text {
  position: relative;
  display: inline-block;
  isolation: isolate;
}

.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.glitch-text::before {
  color: #0ff;
  -webkit-text-fill-color: #0ff;
  z-index: -1;
  opacity: 0.8;
  animation: glitchTop 2s infinite steps(1);
}

.glitch-text::after {
  color: #f0f;
  -webkit-text-fill-color: #f0f;
  z-index: -2;
  opacity: 0.8;
  animation: glitchBottom 2.3s infinite steps(1);
}

@keyframes glitchTop {
  0%, 84%, 100% { clip-path: inset(0 0 85% 0); transform: translate(0); }
  86% { clip-path: inset(10% 0 60% 0); transform: translate(-2px, -1px); }
  88% { clip-path: inset(40% 0 20% 0); transform: translate(2px, 1px); }
  90% { clip-path: inset(70% 0 5% 0); transform: translate(-1px, 1px); }
  92% { clip-path: inset(5% 0 70% 0); transform: translate(1px, -1px); }
  94% { clip-path: inset(20% 0 50% 0); transform: translate(-3px, 0); }
  96% { clip-path: inset(55% 0 15% 0); transform: translate(1px, 1px); }
  98% { clip-path: inset(0 0 85% 0); transform: translate(0); }
}

@keyframes glitchBottom {
  0%, 82%, 100% { clip-path: inset(85% 0 0 0); transform: translate(0); }
  84% { clip-path: inset(60% 0 10% 0); transform: translate(2px, 1px); }
  86% { clip-path: inset(20% 0 40% 0); transform: translate(-2px, -1px); }
  88% { clip-path: inset(50% 0 30% 0); transform: translate(1px, -1px); }
  90% { clip-path: inset(75% 0 5% 0); transform: translate(-1px, 1px); }
  92% { clip-path: inset(30% 0 40% 0); transform: translate(3px, 0); }
  94% { clip-path: inset(10% 0 60% 0); transform: translate(-1px, 1px); }
  96% { clip-path: inset(85% 0 0 0); transform: translate(0); }
}

.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-2xl) 0;
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-card-hover) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.fade-in {
  animation: fadeIn var(--transition-slow) ease forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-up {
  animation: slideUp var(--transition-slow) ease forwards;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  animation: scaleIn var(--transition-bounce) ease forwards;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.float {
  animation: float 6s ease-in-out infinite;
}

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

.glow {
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    box-shadow: var(--shadow-glow-sm);
  }
  to {
    box-shadow: var(--shadow-glow);
  }
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

::selection {
  background: rgba(255, 0, 122, 0.3);
  color: var(--color-text-primary);
}

@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }
  
  .section {
    padding: var(--spacing-3xl) 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
  }
  
  .footer-brand {
    grid-column: span 2;
    max-width: none;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.25rem;
    --spacing-4xl: 4rem;
    --spacing-3xl: 3rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
  }

  .mobile-menu-toggle:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
  }

  .mobile-menu-toggle.active {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: white;
  }

  .mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
  }

  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    z-index: 100;
  }

  .nav-menu.active .nav-item {
    width: 100%;
  }

  .nav-menu.active .nav-link {
    display: block;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
  }

  .nav-menu.active .has-mega-menu .mega-menu {
    position: relative;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    margin-top: var(--spacing-sm);
  }

  .mobile-menu-btn {
    display: flex;
  }
  
  .header-actions .btn {
    display: none;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer-brand {
    grid-column: span 1;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
  }
  
  .btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
  }
}