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

:root {
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F8F8F8;
  --color-bg-tertiary: #F5F5F5;
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-accent: #C0A080;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.nav-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.nav-link {
  position: relative;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

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

.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.slide-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.slide-item.active {
  opacity: 1;
}

.slide-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slide-caption {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-bg-primary);
  background-color: rgba(0, 0, 0, 0.5);
  padding: 1.5rem 3rem;
  backdrop-filter: blur(8px);
  border-radius: 4px;
  font-size: 1.25rem;
  font-weight: 300;
  letter-spacing: 0.05em;
}

.image-card {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-card:hover img {
  transform: scale(1.05);
}

.image-card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: var(--color-bg-primary);
  padding: 2rem 1.5rem;
  opacity: 0;
  transition: var(--transition-smooth);
}

.image-card:hover .image-overlay {
  opacity: 1;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background-color: var(--color-accent);
  margin: 1rem auto 0;
}

.text-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 2;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.lazy-load {
  opacity: 0;
  transition: opacity 0.6s ease-in-out;
}

.lazy-load.loaded {
  opacity: 1;
}

.footer-section {
  border-top: 1px solid var(--color-bg-tertiary);
  padding: 3rem 0;
  text-align: center;
  margin-top: 5rem;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 300;
  letter-spacing: 0.05em;
}

.divider-line {
  width: 80px;
  height: 1px;
  background-color: var(--color-accent);
  margin: 2rem auto;
}

@media (max-width: 768px) {
  .hero-slider {
    height: 70vh;
  }

  .slide-caption {
    font-size: 1rem;
    padding: 1rem 2rem;
    bottom: 5%;
  }

  .section-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
  }

  .text-content {
    font-size: 1rem;
    line-height: 1.8;
  }

  .collection-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .slide-caption {
    font-size: 0.875rem;
    padding: 0.75rem 1.5rem;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

.fade-in {
  animation: fadeIn 0.8s ease-in-out;
}

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

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}