/* 全局变量 */
:root {
  --color-primary: #1a1a1a;
  --color-secondary: #666666;
  --color-accent-pink: #e8d5d2;
  --color-accent-blue: #a8b2c1;
  --color-accent-beige: #e6e2dd;
  --color-white: #ffffff;
  --color-gray-light: #f5f5f5;
  --color-gray-medium: #cccccc;
  
  --font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-primary);
  background: var(--color-white);
}

/* 导航栏样式 */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-light);
}

nav h1 {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: 2px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

nav a {
  text-decoration: none;
  color: var(--color-secondary);
  transition: var(--transition);
  padding: var(--spacing-xs) var(--spacing-sm);
}

nav a:hover,
nav a.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

/* 轮播图样式 */
.slider {
  position: relative;
  height: 70vh;
  overflow: hidden;
  background: var(--color-gray-light);
}

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

.slide.active {
  opacity: 1;
}

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

.slide-caption {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-white);
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.slide-caption h2 {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: var(--spacing-xs);
}

/* 网格布局 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.grid-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
}

.grid-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.grid-item img {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.grid-item-caption {
  padding: var(--spacing-sm);
  background: var(--color-white);
  font-size: 0.9rem;
  color: var(--color-secondary);
}

/* 分类标签 */
.category-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.tab {
  padding: var(--spacing-xs) var(--spacing-md);
  background: transparent;
  border: 1px solid var(--color-gray-medium);
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.tab:hover,
.tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* CTA按钮 */
.cta {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  margin: var(--spacing-md) auto;
}

.cta:hover {
  background: var(--color-secondary);
  transform: translateY(-2px);
}

/* 内容区块 */
.content-section {
  padding: var(--spacing-lg) var(--spacing-md);
}

.content-section h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 1px;
}

/* 瀑布流布局 */
.masonry {
  column-count: 3;
  column-gap: var(--spacing-sm);
}

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

.masonry-item img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

/* 页脚 */
footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  margin-top: var(--spacing-xl);
}

footer hr {
  border: none;
  border-top: 1px solid var(--color-gray-light);
  margin-bottom: var(--spacing-md);
}

footer p {
  color: var(--color-secondary);
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .slider {
    height: 50vh;
  }
  
  .slide-caption h2 {
    font-size: 1.5rem;
  }
  
  .masonry {
    column-count: 2;
  }
  
  .category-tabs {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .masonry {
    column-count: 1;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  nav h1 {
    font-size: 1.2rem;
  }
  
  .content-section h2 {
    font-size: 1.5rem;
  }
}

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

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

/* 图片悬停效果 */
.image-overlay {
  position: relative;
  overflow: hidden;
}

.image-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
  opacity: 0;
  transition: var(--transition);
}

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

/* 隐藏元素 */
.hidden {
  display: none;
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-light);
  border-top: 2px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}