/* ==================== 全局重置与基础样式 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 色彩系统 */
  --color-bg-primary: #F8F7F4;
  --color-bg-secondary: #E8E5DE;
  --color-text-primary: #2C2C2C;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-accent-blue: #A3B8D0;
  --color-accent-terra: #E8CABA;
  
  /* 字体系统 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: "Montserrat", var(--font-sans);
  
  /* 字号系统 */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;
  --font-size-4xl: 48px;
  
  /* 间距系统 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 60px;
  --spacing-2xl: 80px;
  
  /* 过渡效果 */
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: opacity var(--transition-base);
}

a:hover {
  opacity: 0.7;
}

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 247, 244, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(232, 229, 222, 0.5);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: var(--font-size-xl);
  font-weight: 300;
  letter-spacing: 2px;
}

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

.navbar-menu a {
  font-size: var(--font-size-base);
  font-weight: 300;
  letter-spacing: 1px;
  position: relative;
  transition: color var(--transition-base);
}

.navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text-primary);
  transition: width var(--transition-base);
}

.navbar-menu a:hover::after,
.navbar-menu a.active::after {
  width: 100%;
}

/* ==================== 主要布局容器 ==================== */
.main-content {
  padding-top: 80px;
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  letter-spacing: 2px;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  font-weight: 300;
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ==================== 全屏轮播区 ==================== */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

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

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

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: white;
  z-index: 10;
  width: 80%;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 300;
  letter-spacing: 3px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  margin-bottom: var(--spacing-md);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
}

/* ==================== 网格布局 ==================== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

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

.grid-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-secondary);
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.grid-item-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);
  color: white;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.grid-item:hover .grid-item-overlay {
  opacity: 1;
}

.grid-item-title {
  font-size: var(--font-size-lg);
  font-weight: 300;
  margin-bottom: var(--spacing-xs);
}

.grid-item-desc {
  font-size: var(--font-size-sm);
  font-weight: 300;
  opacity: 0.9;
}

/* ==================== 卡片组件 ==================== */
.card-container {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.card {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
  background: white;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.card-image {
  width: 100%;
  height: 400px;
  overflow: hidden;
}

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

.card:hover .card-image img {
  transform: scale(1.08);
}

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

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 1px;
}

.card-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

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

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-lg);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.masonry-item img {
  width: 100%;
  transition: transform var(--transition-slow);
}

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

/* ==================== 故事叙事布局 ==================== */
.story-section {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
  margin-bottom: var(--spacing-2xl);
}

.story-section:nth-child(even) {
  flex-direction: row-reverse;
}

.story-image {
  flex: 1;
  overflow: hidden;
}

.story-image img {
  width: 100%;
  height: 600px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.story-section:hover .story-image img {
  transform: scale(1.03);
}

.story-content {
  flex: 1;
  padding: var(--spacing-lg);
}

.story-title {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  letter-spacing: 2px;
}

.story-text {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* ==================== 细节展示 ==================== */
.detail-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.detail-item {
  position: relative;
  overflow: hidden;
}

.detail-item img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.detail-item:hover img {
  transform: scale(1.1);
}

.detail-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: rgba(255,255,255,0.95);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.detail-item:hover .detail-caption {
  transform: translateY(0);
}

.detail-caption-title {
  font-size: var(--font-size-lg);
  font-weight: 400;
  margin-bottom: var(--spacing-xs);
}

.detail-caption-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ==================== 页脚 ==================== */
.footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-2xl);
}

/* ==================== 加载动画 ==================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .masonry {
    column-count: 2;
  }
  
  .story-section {
    flex-direction: column !important;
  }
  
  .detail-showcase {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 32px;
    --font-size-3xl: 28px;
    --spacing-lg: 24px;
    --spacing-xl: 40px;
    --spacing-2xl: 60px;
  }
  
  .navbar {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .navbar-menu {
    gap: var(--spacing-md);
  }
  
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .masonry {
    column-count: 1;
  }
  
  .card-container {
    flex-direction: column;
  }
  
  .card {
    max-width: 100%;
  }
  
  .hero-content {
    width: 90%;
  }
  
  .story-image img {
    height: 400px;
  }
}

@media (max-width: 480px) {
  .navbar-brand {
    font-size: var(--font-size-lg);
  }
  
  .navbar-menu {
    gap: var(--spacing-sm);
  }
  
  .navbar-menu a {
    font-size: var(--font-size-sm);
  }
}