/* 全局设计令牌 */
:root {
  /* 主色调 */
  --primary-ivory: #FFFFF0;
  --primary-oatmeal: #E8E0D5;
  --primary-beige: #F5F5DC;
  
  /* 辅助色 */
  --secondary-charcoal: #36454F;
  --secondary-warm-gray: #D3D3D3;
  
  /* 文字颜色 */
  --text-primary: #36454F;
  --text-secondary: #6C757D;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* 圆角 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* 阴影 */
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.16);
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Source Han Sans CN', 'Microsoft YaHei', sans-serif;
  background-color: var(--primary-ivory);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航栏样式 */
nav {
  background-color: rgba(255, 255, 240, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--secondary-warm-gray);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md) 0;
  gap: var(--spacing-xl);
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
  position: relative;
}

nav a:hover,
nav a.active {
  color: var(--text-secondary);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--text-secondary);
  transition: width var(--transition-normal);
}

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

/* 主容器 */
.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  margin-top: 80px;
}

/* 图片容器样式 */
.image-card {
  background-color: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

/* 瀑布流布局 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
}

/* 标签筛选 */
.filter-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
}

.tag {
  background-color: var(--primary-beige);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.tag:hover,
.tag.active {
  background-color: var(--primary-oatmeal);
  border-color: var(--secondary-charcoal);
}

/* 灯箱样式 */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
  justify-content: center;
  align-items: center;
}

.lightbox img {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  animation: fadeIn var(--transition-normal);
}

/* 杂志式布局 */
.magazine-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.content-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.content-section:nth-child(even) {
  direction: rtl;
}

.content-section:nth-child(even) > * {
  direction: ltr;
}

/* 文字样式 */
.heading-primary {
  font-size: 3rem;
  font-weight: 200;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.heading-secondary {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.paragraph {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.caption {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: var(--spacing-xs);
  font-style: italic;
}

/* 页脚 */
footer {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .main-container {
    padding: var(--spacing-md);
  }
  
  .content-section {
    grid-template-columns: 1fr;
  }
  
  nav ul {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-sm);
  }
  
  .heading-primary {
    font-size: 2rem;
  }
  
  .heading-secondary {
    font-size: 1.5rem;
  }
  
  nav ul {
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
  }
  
  nav a {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .main-container {
    padding: var(--spacing-sm);
  }
  
  nav ul {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }
  
  nav a {
    font-size: 0.8rem;
  }
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-normal);
}

/* 加载状态 */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--secondary-warm-gray);
  border-top-color: var(--secondary-charcoal);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 按钮样式 */
.btn-primary {
  background-color: var(--primary-oatmeal);
  color: var(--text-primary);
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.btn-primary:hover {
  background-color: var(--primary-beige);
  transform: translateY(-2px);
  box-shadow: var(--shadow-light);
}

/* 轮播图样式 */
.carousel {
  position: relative;
  width: 100%;
  height: 70vh;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-slide {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

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

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

.carousel-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--primary-beige);
}

::-webkit-scrollbar-thumb {
  background: var(--secondary-charcoal);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}