/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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: #343A40;
  background-color: #FFFFFF;
  overflow-x: hidden;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 4rem;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all 0.3s ease;
}

.logo {
  font-size: 1.25rem;
  font-weight: 300;
  letter-spacing: 2px;
  color: #343A40;
}

.nav-links {
  display: flex;
  gap: 3rem;
}

.nav-links a {
  position: relative;
  text-decoration: none;
  color: #343A40;
  font-size: 0.875rem;
  font-weight: 300;
  letter-spacing: 1px;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: #343A40;
  transition: width 0.3s ease;
}

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

/* 全屏区块 */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform 0.3s ease;
}

.hero-text {
  position: relative;
  z-index: 10;
  font-size: 2.5rem;
  font-weight: 100;
  letter-spacing: 4px;
  text-align: center;
  color: #343A40;
  padding: 2rem;
  background-color: rgba(255, 255, 255, 0.9);
}

/* 网格布局 */
.grid-section {
  padding: 5rem 4rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-item {
  aspect-ratio: 3/4;
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.grid-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: #FFFFFF;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

/* 单品特写区 */
.showcase-section {
  padding: 5rem 4rem;
  background-color: #F8F9FA;
}

.showcase-title {
  font-size: 1.75rem;
  font-weight: 300;
  letter-spacing: 3px;
  text-align: center;
  margin-bottom: 3rem;
  color: #343A40;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.showcase-item {
  aspect-ratio: 1;
  overflow: hidden;
  background-color: #FFFFFF;
  transition: transform 0.3s ease;
}

.showcase-item:hover {
  transform: translateY(-10px);
}

.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 观点短文区 */
.article-section {
  max-width: 800px;
  margin: 5rem auto;
  padding: 0 2rem;
  line-height: 2;
}

.article-title {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: 2px;
  margin-bottom: 2rem;
  color: #343A40;
}

.article-content {
  font-size: 0.875rem;
  color: #6C757D;
  letter-spacing: 1px;
}

/* 瀑布流布局 */
.waterfall-section {
  padding: 8rem 4rem 5rem;
  display: grid;
  grid-template-columns: 70% 30%;
  gap: 2rem;
}

.waterfall-main {
  display: grid;
  gap: 2rem;
}

.waterfall-item {
  overflow: hidden;
  background-color: #F8F9FA;
}

.waterfall-item img {
  width: 100%;
  display: block;
  transition: transform 0.6s ease;
}

.waterfall-item:hover img {
  transform: scale(1.03);
}

.waterfall-sidebar {
  display: grid;
  gap: 2rem;
}

.sidebar-item {
  padding: 1.5rem;
  background-color: #F8F9FA;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 1rem;
  color: #343A40;
}

.sidebar-text {
  font-size: 0.75rem;
  color: #6C757D;
  line-height: 1.8;
}

/* 模块网格 */
.module-grid {
  padding: 8rem 4rem 5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.module-item {
  aspect-ratio: 3/4;
  overflow: hidden;
  position: relative;
  background-color: #F8F9FA;
  cursor: pointer;
}

.module-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.module-item:hover img {
  transform: scale(1.08);
}

.module-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(255, 255, 255, 0.95);
  padding: 2rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

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

.overlay-title {
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 1rem;
  color: #343A40;
}

.overlay-text {
  font-size: 0.75rem;
  color: #6C757D;
  line-height: 1.8;
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 3rem 2rem;
  background-color: #F8F9FA;
  font-size: 0.75rem;
  color: #6C757D;
  letter-spacing: 2px;
}

/* 响应式设计 */
@media (max-width: 1199px) {
  .navbar {
    padding: 1.5rem 2rem;
  }

  .grid-section,
  .showcase-section,
  .waterfall-section,
  .module-grid {
    padding-left: 2rem;
    padding-right: 2rem;
  }

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

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

@media (max-width: 767px) {
  .navbar {
    padding: 1rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .hero-text {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }

  .grid-section {
    grid-template-columns: 1fr;
    padding: 3rem 1rem;
  }

  .showcase-section {
    padding: 3rem 1rem;
  }

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

  .waterfall-section {
    grid-template-columns: 1fr;
    padding: 6rem 1rem 3rem;
  }

  .module-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 6rem 1rem 3rem;
    gap: 1rem;
  }

  .article-section {
    margin: 3rem auto;
    padding: 0 1rem;
  }
}

/* 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;
}

/* 图片懒加载占位 */
img[data-src] {
  background-color: #E9ECEF;
}