/* 色彩系统 */
:root {
  --primary-dark: #2C2C2C;
  --primary-light: #F5F5F5;
  --secondary-beige: #E8E1D5;
  --secondary-blue: #4A6572;
  --accent-gold: #B8860B;
  --transition-slow: 0.5s;
  --transition-fast: 0.3s;
}

/* 字体规范 */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300&display=swap');

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--primary-dark);
  background: var(--primary-light);
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4 {
  font-family: 'Montserrat', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* 响应式布局容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* 导航样式 */
nav {
  background: var(--primary-light);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

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

.nav-link {
  color: var(--primary-dark);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast);
  font-weight: 300;
}

.nav-link:hover,
.nav-link.active {
  color: var(--secondary-blue);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gold);
}

/* 主页轮播 */
.hero-carousel {
  height: 100vh;
  position: relative;
  overflow: hidden;
}

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

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

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

/* 四宫格导航 */
.grid-nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.grid-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border-radius: 8px;
  aspect-ratio: 1;
}

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

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

.grid-item-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: white;
}

/* 季节展示 */
.season-showcase {
  padding: 4rem 2rem;
  background: var(--secondary-beige);
}

.season-scroll {
  display: flex;
  gap: 2rem;
  overflow-x: auto;
  padding: 2rem 0;
  scroll-behavior: smooth;
}

.season-card {
  flex: 0 0 300px;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
}

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

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

/* 标签筛选器 */
.tag-filter {
  display: flex;
  gap: 1rem;
  padding: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.tag {
  padding: 0.5rem 1.5rem;
  background: var(--primary-light);
  border: 1px solid var(--secondary-blue);
  border-radius: 25px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* 瀑布流 */
.masonry {
  columns: 4 320px;
  column-gap: 1rem;
  padding: 2rem;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1rem;
}

.masonry-item img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  transition: transform var(--transition-fast);
}

.masonry-item:hover img {
  transform: scale(1.02);
}

/* 杂志布局 */
.magazine-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.article-card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
}

.article-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.article-content {
  padding: 1.5rem;
}

.instant-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.instant-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform var(--transition-fast);
}

.instant-grid img:hover {
  transform: scale(1.1);
  z-index: 10;
}

/* 视觉档案 */
.panorama-scroll {
  overflow-x: auto;
  white-space: nowrap;
  padding: 2rem;
}

.panorama-item {
  display: inline-block;
  height: 600px;
  margin-right: 2rem;
}

.panorama-item img {
  height: 100%;
  width: auto;
  border-radius: 8px;
}

/* 页脚 */
footer {
  border-top: 1px solid var(--primary-dark);
  padding: 40px 0;
  text-align: center;
  background: var(--primary-light);
  margin-top: 4rem;
}

.footer-text {
  color: var(--primary-dark);
  font-size: 0.9rem;
  line-height: 1.8;
  opacity: 0.8;
}

/* 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-out;
}

/* 图片说明悬浮 */
.image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 1rem;
  transform: translateY(100%);
  transition: transform var(--transition-fast);
}

.image-container:hover .image-caption {
  transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    flex-direction: column;
    gap: 1rem;
  }

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

  .magazine-layout {
    grid-template-columns: 1fr;
  }

  .masonry {
    columns: 2;
  }

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

@media (max-width: 480px) {
  .masonry {
    columns: 1;
  }

  .season-card {
    flex: 0 0 250px;
  }
}

/* 加载动画 */
.loading {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.loading.loaded {
  opacity: 1;
  transform: translateY(0);
}

/* 全屏图片查看器 */
.fullscreen-viewer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  z-index: 2000;
  display: none;
  justify-content: center;
  align-items: center;
}

.fullscreen-viewer.active {
  display: flex;
}

.fullscreen-image {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}