/* 全局样式 - 极简现代风格 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  --color-primary: #1a1a1a;
  --color-secondary: #6b6b6b;
  --color-accent: #c9a961;
  --color-bg: #fafafa;
  --color-white: #ffffff;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--color-primary);
  background-color: var(--color-bg);
  line-height: 1.8;
  overflow-x: hidden;
}

.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: 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: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-smooth);
}

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

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

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.slide.active {
  opacity: 1;
}

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

.slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
  padding: 4rem 2rem;
  color: var(--color-white);
}

.collection-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition-smooth);
  background: var(--color-white);
}

.collection-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.collection-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: var(--transition-smooth);
}

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

.collection-details {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: var(--color-white);
  padding: 2rem;
  transform: translateY(100%);
  transition: var(--transition-smooth);
}

.collection-card:hover .collection-details {
  transform: translateY(0);
}

.philosophy-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 6rem 2rem;
}

.philosophy-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

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

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

@media (max-width: 768px) {
  .hero-slider {
    height: 70vh;
  }
  
  .collection-image {
    height: 300px;
  }
  
  .philosophy-section {
    padding: 4rem 1.5rem;
  }
  
  .slide-overlay {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .collection-image {
    height: 250px;
  }
}