/* 基础重置与全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg-primary: #FAF9F6;
  --color-bg-secondary: #E8E5DF;
  --color-accent: #C0B9A8;
  --color-text-primary: rgba(44, 44, 44, 0.9);
  --color-text-secondary: rgba(90, 90, 90, 0.8);
  --color-overlay: rgba(255, 255, 255, 0.05);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --transition-base: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

/* 导航栏 */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(250, 249, 246, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(192, 185, 168, 0.2);
}

nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  position: relative;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: 1px;
  transition: color var(--transition-base);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition-base), left var(--transition-base);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-links a:hover::after {
  width: 100%;
  left: 0;
}

/* 主内容区 */
main {
  margin-top: 80px;
  min-height: calc(100vh - 160px);
}

/* 轮播图区域 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 90vh;
  overflow: hidden;
}

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

.slide.active {
  opacity: 1;
}

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

.slide-caption {
  position: absolute;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  max-width: 500px;
  padding: var(--spacing-md);
  background-color: rgba(250, 249, 246, 0.9);
  backdrop-filter: blur(10px);
}

.slide-caption h2 {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 1px;
}

.slide-caption p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 内容容器 */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.section {
  margin-bottom: var(--spacing-xl);
}

/* 标题样式 */
h1, h2, h3 {
  font-family: 'Playfair Display', serif;
  color: var(--color-text-primary);
  font-weight: 500;
  letter-spacing: 1px;
}

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

/* 网格布局 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* 卡片样式 */
.card {
  position: relative;
  overflow: hidden;
  background-color: var(--color-bg-secondary);
  transition: transform var(--transition-base);
}

.card:hover {
  transform: scale(1.03);
}

.card-image {
  position: relative;
  width: 100%;
  padding-bottom: 133%;
  overflow: hidden;
}

.card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

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

.card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover .card-overlay {
  opacity: 1;
}

.card-content {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

.card-description {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 交替布局 */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  align-items: center;
}

.feature:nth-child(even) .feature-image {
  order: 2;
}

.feature-image {
  position: relative;
  overflow: hidden;
  padding-bottom: 120%;
}

.feature-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-content {
  padding: var(--spacing-md);
}

/* 引用样式 */
.quote {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.quote-text {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: 1.6;
  font-style: italic;
  max-width: 800px;
  margin: 0 auto;
}

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

.category-tag {
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 1px;
}

.category-tag:hover,
.category-tag.active {
  background-color: var(--color-accent);
  color: var(--color-bg-primary);
}

/* 页脚 */
footer {
  text-align: center;
  padding: var(--spacing-md);
  border-top: 1px solid rgba(192, 185, 168, 0.2);
  background-color: var(--color-bg-secondary);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* 渐入动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  nav {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature {
    grid-template-columns: 1fr;
  }

  .feature:nth-child(even) .feature-image {
    order: 1;
  }

  h1 {
    font-size: 2.5rem;
  }

  .quote-text {
    font-size: 1.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }

  nav {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

  .grid,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .slide-caption {
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .quote-text {
    font-size: 1.3rem;
  }

  .container {
    padding: var(--spacing-md) var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .grid,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .nav-links {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .logo {
    font-size: 1.2rem;
  }
}

/* 图片响应式处理 */
.img-responsive {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--color-bg-secondary);
  border-radius: 50%;
  border-top-color: var(--color-accent);
  animation: spin 1s ease-in-out infinite;
}

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