/* ===================================
   GPT Image 1.5 Landing Page Styles
   Modern Dark Theme with Glassmorphism
   =================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Colors */
  --color-bg-primary: #0a0a1a;
  --color-bg-secondary: #0f0f2a;
  --color-bg-card: rgba(25, 25, 50, 0.6);
  --color-bg-card-hover: rgba(35, 35, 70, 0.8);

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0c0;
  --color-text-muted: #6a6a8a;

  --color-accent-primary: #818cf8;
  --color-accent-secondary: #a78bfa;
  --color-accent-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);

  --color-border: rgba(129, 140, 248, 0.2);
  --color-border-hover: rgba(129, 140, 248, 0.5);
  --color-glow: rgba(129, 140, 248, 0.5);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --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;

  /* Spacing */
  --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;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

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

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

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

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  background: rgba(10, 10, 26, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: var(--spacing-xl);
}

.nav a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.lang-switch {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.lang-switch a {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.lang-switch a.active {
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--color-text-primary);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
  padding-top: calc(var(--spacing-4xl) + 60px);
}

.hero-content {
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.6s ease;
}

.hero-badge::before {
  content: '✨';
}

.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.6s ease 0.1s backwards;
}

.hero h1 .gradient-text {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s backwards;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.5);
  color: var(--color-text-primary);
}

.btn-secondary {
  background: var(--color-bg-card);
  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);
  color: var(--color-text-primary);
}

/* Sections */
.section {
  padding: var(--spacing-4xl) 0;
}

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

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

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

/* About Section 卡片网格 */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.about-card {
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

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

.about-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.about-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.about-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

.about-card code {
  background: rgba(129, 140, 248, 0.2);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

/* Why Section */
.why-section {
  background: var(--color-bg-secondary);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.why-card {
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
}

.why-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.why-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.why-card ul li {
  padding: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
  position: relative;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.why-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.why-card--problem {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.why-card--problem h3 {
  color: #ef4444;
}

.why-card--problem ul li::before {
  background: #ef4444;
}

.why-card--solution {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.why-card--solution h3 {
  color: #10b981;
}

.why-card--solution ul li::before {
  background: #10b981;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.feature-list {
  list-style: none;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.feature-list li::before {
  content: '✓';
  color: var(--color-accent-primary);
  font-weight: bold;
}

/* Use Cases Grid */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.usecase-card {
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.usecase-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

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

.usecase-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.usecase-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Specs Section */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.spec-card {
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.spec-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.spec-label {
  font-size: var(--font-size-sm);
  color: var(--color-accent-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.spec-value {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* How It Works */
.howto-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.howto-card {
  padding: var(--spacing-2xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.howto-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.howto-card h3::before {
  content: attr(data-step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
}

.howto-steps {
  list-style: none;
  counter-reset: step;
}

.howto-steps li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  color: var(--color-text-secondary);
}

.howto-steps li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.howto-note {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-accent-primary);
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg) 0;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition-fast);
}

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

.faq-question::after {
  content: '+';
  font-size: var(--font-size-xl);
  color: var(--color-accent-primary);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
}

/* Resource Cards */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.resource-card {
  position: relative;
  display: block;
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  text-decoration: none;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.resource-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.resource-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-lg);
  transition: color var(--transition-fast);
}

.resource-card:hover h3 {
  color: var(--color-accent-primary);
}

.resource-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.resource-card--primary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.resource-card--primary:hover {
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.3);
}

.resource-card--success {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.resource-card--success:hover {
  border-color: rgba(16, 185, 129, 0.6);
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.25);
}

.resource-card--warning {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.resource-card--warning:hover {
  border-color: rgba(245, 158, 11, 0.6);
  box-shadow: 0 8px 32px rgba(245, 158, 11, 0.25);
}

.resource-card .card-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-accent-gradient);
  color: white;
  font-size: var(--font-size-xs);
  padding: 4px 12px;
  border-radius: 0 var(--radius-xl) 0 var(--radius-md);
}

.resource-card .card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.resource-card .card-arrow {
  display: flex;
  align-items: center;
  font-weight: 500;
  color: var(--color-accent-primary);
  transition: transform var(--transition-fast);
}

.resource-card:hover .card-arrow {
  transform: translateX(4px);
}

.resource-card .card-arrow span:last-child {
  margin-left: 8px;
}

/* Tips Box */
.tips-box {
  max-width: 900px;
  margin: var(--spacing-2xl) auto 0;
  background: rgba(99, 102, 241, 0.05);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

.tips-box h3 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.tips-grid h4 {
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-base);
}

.tips-grid p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.tips-link {
  display: block;
  text-align: center;
  margin-top: var(--spacing-lg);
  color: var(--color-accent-primary);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.tips-link:hover {
  color: var(--color-accent-secondary);
}

/* Final CTA Section */
.cta-section {
  text-align: center;
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.cta-section h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  padding: var(--spacing-3xl) 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-links {
  display: flex;
  gap: var(--spacing-xl);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

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

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

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right 0.3s ease;
    z-index: 999;
  }

  .nav.active {
    right: 0;
    display: flex;
  }

  .nav a {
    font-size: var(--font-size-xl);
    margin: var(--spacing-md) 0;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero {
    padding-top: calc(var(--spacing-3xl) + 60px);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

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

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

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

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

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

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

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }
}