/* 自定义样式补充 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@100;300;400;500;700&display=swap');

:root {
  --color-primary: #1a1a1a;
  --color-secondary: #666666;
  --color-accent: #8b9b7a;
  --color-oatmeal: #d4c8b0;
  --color-fog: #a8b2c1;
  --bg-cream: #fafafa;
  --bg-gray: #f5f5f5;
}

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
  color: var(--color-primary);
  background-color: var(--bg-cream);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 图片悬停效果 */
.image-hover {
  overflow: hidden;
  transition: all 0.3s ease;
}

.image-hover img {
  transition: transform 0.6s ease;
}

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

/* 瀑布流布局 */
.masonry-grid {
  column-count: 4;
  column-gap: 20px;
}

@media (max-width: 1024px) {
  .masonry-grid {
    column-count: 3;
  }
}

@media (max-width: 768px) {
  .masonry-grid {
    column-count: 2;
  }
}

@media (max-width: 480px) {
  .masonry-grid {
    column-count: 1;
  }
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 20px;
}

/* 导航栏透明度变化 */
.nav-transparent {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.nav-solid {
  background-color: rgba(255, 255, 255, 1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* 按钮样式 */
.btn-primary {
  padding: 12px 32px;
  background: var(--color-primary);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 14px;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  text-transform: uppercase;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-2px);
}

/* 标题样式 */
.title-serif {
  font-family: 'Times New Roman', serif;
  font-weight: 300;
  letter-spacing: -1px;
}

/* 文字淡入效果 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.8s ease;
}

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

/* 加载动画 */
.loader {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

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

/* 图片懒加载占位 */
.lazy-image {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}