:root {
  --primary-color: #333333;
  --background-color: #FFFFFF;
  --secondary-bg: #F8F5F2;
  --accent-color: #B7A57A;
  --text-light: #666666;
  --border-color: #E5E5E5;
  --shadow-light: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-medium: 0 4px 16px rgba(0,0,0,0.1);
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--primary-color);
  background-color: var(--background-color);
  margin: 0;
  padding: 0;
  transition: var(--transition-base);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏样式 */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-light);
  z-index: 1000;
  transition: var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-base);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 1rem;
  position: relative;
  transition: var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

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

.nav-link:hover {
  color: var(--accent-color);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

/* 英雄区域 */
.hero-section {
  height: 100vh;
  position: relative;
  overflow: hidden;
  margin-top: 60px;
}

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

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

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

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.hero-title {
  font-size: 3rem;
  font-weight: 300;
  margin: 0;
  letter-spacing: 0.1em;
}

/* 精选区域 */
.featured-section {
  padding: 5rem 0;
  background: var(--secondary-bg);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 300;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--primary-color);
}

.masonry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.masonry-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  transition: var(--transition-base);
  cursor: pointer;
}

.masonry-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-medium);
}

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

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

.masonry-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: white;
  padding: 1.5rem;
  transform: translateY(100%);
  transition: var(--transition-base);
}

.masonry-item:hover .masonry-overlay {
  transform: translateY(0);
}

/* 分类筛选器 */
.filter-container {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.5rem;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 25px;
  cursor: pointer;
  transition: var(--transition-base);
  font-size: 0.9rem;
  color: var(--primary-color);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* 图片墙 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: white;
  box-shadow: var(--shadow-light);
  transition: var(--transition-base);
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.gallery-image {
  width: 100%;
  height: 333px;
  object-fit: cover;
  transition: var(--transition-base);
}

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

.gallery-info {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: var(--transition-base);
}

.gallery-item:hover .gallery-info {
  opacity: 1;
}

/* 故事卡片 */
.story-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition-base);
  margin-bottom: 2rem;
}

.story-card:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-3px);
}

.story-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.story-content {
  padding: 2rem;
}

.story-title {
  font-size: 1.8rem;
  font-weight: 300;
  margin: 0 0 1rem 0;
  color: var(--primary-color);
}

.story-description {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.story-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-base);
}

.story-link:hover {
  text-decoration: underline;
}

/* 博客列表 */
.blog-list {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
}

.blog-articles {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.article-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition-base);
}

.article-card:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-3px);
}

.article-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.article-content {
  padding: 1.5rem;
}

.article-title {
  font-size: 1.5rem;
  font-weight: 400;
  margin: 0 0 1rem 0;
  color: var(--primary-color);
}

.article-excerpt {
  color: var(--text-light);
  line-height: 1.6;
  margin: 0;
}

/* 标签云 */
.tags-widget {
  background: var(--secondary-bg);
  border-radius: 12px;
  padding: 2rem;
}

.widget-title {
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0 0 1.5rem 0;
  color: var(--primary-color);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.tag {
  padding: 0.4rem 1rem;
  background: white;
  border-radius: 20px;
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-base);
  border: 1px solid var(--border-color);
}

.tag:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* 页脚 */
.footer {
  background: var(--background-color);
  text-align: center;
  padding: 2rem 0;
  color: var(--text-light);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

/* 模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.8);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: 12px;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 2rem;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-light);
  transition: var(--transition-base);
}

.modal-close:hover {
  color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1rem;
    box-shadow: var(--shadow-light);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .masonry-grid,
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  
  .blog-list {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  .nav-container {
    padding: 1rem 15px;
  }
  
  .hero-title {
    font-size: 1.5rem;
  }
  
  .masonry-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

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

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* 图片懒加载占位 */
.image-placeholder {
  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;
  }
}