/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 根样式 */
:root {
  --bg-color: #f5f5f5;
  --text-color: #333;
  --accent-color: #8a7f7a;
  --white: #ffffff;
  --border-color: #e5e5e5;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航栏 */
nav {
  background-color: var(--white);
  padding: 1.5rem 2rem;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-light);
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  max-width: 1200px;
  margin: 0 auto;
}

nav li {
  margin: 0 2rem;
}

nav a {
  text-decoration: none;
  color: var(--accent-color);
  font-size: 0.95rem;
  font-weight: 400;
  transition: var(--transition);
  position: relative;
  letter-spacing: 0.05em;
}

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

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--text-color);
  transition: width 0.3s ease;
}

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

/* 主容器 */
main {
  margin-top: 80px;
  min-height: calc(100vh - 140px);
  padding: 2rem;
}

/* Hero区域 */
.hero {
  height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--white) 100%);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
  animation: fadeInUp 1s ease;
}

.hero p {
  font-size: 1.2rem;
  color: var(--accent-color);
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease 0.2s backwards;
}

/* 网格布局 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* 图片卡片 */
.image-card {
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

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

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

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

.image-card .caption {
  padding: 1.5rem;
  font-size: 0.9rem;
  color: var(--accent-color);
  line-height: 1.4;
}

/* 瀑布流布局 */
.masonry {
  column-count: 3;
  column-gap: 2rem;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 2rem;
}

@media (max-width: 1024px) {
  .masonry {
    column-count: 2;
  }
}

@media (max-width: 640px) {
  .masonry {
    column-count: 1;
  }
}

/* 过滤标签 */
.filter-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
  padding: 1rem;
}

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

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

/* 图文交叉布局 */
.content-section {
  display: flex;
  align-items: center;
  margin-bottom: 6rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  gap: 4rem;
}

.content-section.reverse {
  flex-direction: row-reverse;
}

.content-image {
  flex: 1;
}

.content-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-medium);
}

.content-text {
  flex: 1;
  padding: 2rem;
}

.content-text h3 {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: 1rem;
  color: var(--text-color);
  letter-spacing: 0.05em;
}

.content-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--accent-color);
}

/* 故事卡片 */
.story-card {
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

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

.story-header {
  padding: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.story-header h3 {
  font-size: 1.8rem;
  font-weight: 300;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.story-header .meta {
  color: var(--accent-color);
  font-size: 0.9rem;
}

.story-content {
  padding: 2rem;
}

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

.story-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.story-images img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 4px;
}

/* 精选系列 */
.featured {
  padding: 4rem 2rem;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: 3rem;
  letter-spacing: 0.1em;
  color: var(--text-color);
}

/* 页脚 */
footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: var(--accent-color);
  background-color: var(--white);
  margin-top: 4rem;
}

/* 动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 响应式设计 */
@media (max-width: 768px) {
  nav {
    padding: 1rem;
  }
  
  nav li {
    margin: 0 1rem;
  }
  
  nav a {
    font-size: 0.85rem;
  }
  
  main {
    padding: 1rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .content-section,
  .content-section.reverse {
    flex-direction: column;
    gap: 2rem;
  }
  
  .content-text {
    padding: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  nav ul {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  
  nav li {
    margin: 0.5rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero {
    height: calc(100vh - 160px);
  }
}