@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary-blue: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --secondary-teal: #0891b2;
  --accent-orange: #f59e0b;
  --accent-green: #10b981;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  --gradient-primary: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #0891b2 100%);
  --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #10b981 100%);
  --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--neutral-700);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
}

.san-serif {
  font-family: system-ui, sans-serif;
}

/* Enhanced Navigation Styles */
#hem-menu-btn:checked + label .bar-1 {
  transform: rotate(45deg);
  background: var(--primary-blue);
}
#hem-menu-btn:checked + label .bar-2 {
  background: transparent;
}
#hem-menu-btn:checked + label .bar-3 {
  transform: rotate(-45deg);
  background: var(--primary-blue);
}

.question-active:checked + label .question-arrow {
  transform: rotate(180deg);
}

nav {
  overflow-x: hidden;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--neutral-200);
}

.logo img {
  max-width: 200px;
  transition: transform 0.3s ease;
}

.logo img:hover {
  transform: scale(1.05);
}

.product-imgs img {
  max-height: 280px;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.product-imgs:hover img {
  transform: translateY(-5px);
}

/* Modern Button Styles */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

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

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

.btn-secondary {
  background: white;
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
  border-radius: 12px;
  padding: 10px 22px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Enhanced Card Styles */
.card {
  background: white;
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--neutral-200);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-large);
}

.card:hover::before {
  transform: scaleX(1);
}

/* Modern Typography */
.heading-xl {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--neutral-900);
  margin-bottom: 1.5rem;
}

.heading-lg {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-800);
  margin-bottom: 1rem;
}

.heading-md {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--neutral-800);
}

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

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.8s ease-out;
}

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

/* Utility Classes */
.gradient-bg {
  background: var(--gradient-primary);
}

.glass-effect {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.shadow-soft {
  box-shadow: var(--shadow-soft);
}

.shadow-medium {
  box-shadow: var(--shadow-medium);
}

.shadow-large {
  box-shadow: var(--shadow-large);
}

/* Responsive Design */
@media (max-width: 768px) {
  .card {
    padding: 24px;
    margin-bottom: 20px;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-100);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* Focus Styles for Accessibility */
*:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

/* Loading Animation */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}