/* 全局样式 - 时尚女装展示网站 */

/* 重置默认样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 根元素变量定义 */
:root {
  --color-white: #FFFFFF;
  --color-bg-light: #F8F8F8;
  --color-text-dark: #333333;
  --color-divider: #E5E5E5;
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-smooth: all 0.3s ease;
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* 全局字体和背景 */
body {
  font-family: var(--font-family-sans);
  background-color: var(--color-white);
  color: var(--color-text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 导航栏样式 */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  z-index: 1000;
  padding: 1rem 2rem;
  box-shadow: var(--shadow-subtle);
}

nav a {
  color: var(--color-text-dark);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.5px;
  transition: var(--transition-smooth);
  position: relative;
}

nav a:hover {
  opacity: 0.6;
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-text-dark);
}

/* 首屏全屏图像 */
.hero-section {
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-text {
  color: var(--color-white);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: 2px;
  text-align: center;
  animation: fadeInUp 1s ease-out;
}

/* 预告板块样式 */
.preview-block {
  height: 70vh;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.preview-block:hover .preview-image {
  transform: scale(1.05);
}

.preview-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.5);
  padding: 3rem 2rem;
  color: var(--color-white);
}

.preview-title {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 300;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

/* 分隔线 */
.divider {
  height: 1px;
  background-color: var(--color-divider);
  margin: 0;
}

/* 系列精选页面样式 */
.page-header {
  padding: 8rem 2rem 3rem;
  text-align: center;
  background-color: var(--color-bg-light);
}

.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  letter-spacing: 2px;
  margin-bottom: 2rem;
}

/* 分类标签 */
.category-filters {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 2rem;
  background-color: var(--color-white);
}

.category-tag {
  padding: 0.5rem 1.5rem;
  border: 1px solid var(--color-divider);
  background-color: transparent;
  color: var(--color-text-dark);
  font-size: 14px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

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

/* 瀑布流网格 */
.masonry-grid {
  padding: 2rem;
  column-count: 3;
  column-gap: 20px;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.masonry-item img {
  width: 100%;
  display: block;
  transition: var(--transition-smooth);
}

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

.masonry-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0);
  transition: var(--transition-smooth);
}

.masonry-item:hover::after {
  background: rgba(0, 0, 0, 0.2);
}

/* 风格专题页面 */
.story-section {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.story-caption {
  position: relative;
  z-index: 10;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.4);
  padding: 1.5rem 2rem;
  font-size: clamp(1rem, 2vw, 1.2rem);
  letter-spacing: 1px;
  max-width: 600px;
  text-align: center;
  backdrop-filter: blur(10px);
}

/* 页脚 */
footer {
  background-color: var(--color-white);
  padding: 2rem;
  text-align: center;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--color-text-dark);
  border-top: 1px solid var(--color-divider);
}

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

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

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
  .masonry-grid {
    column-count: 2;
  }
  
  nav {
    padding: 1rem;
  }
  
  .category-filters {
    gap: 1rem;
  }
}

/* 响应式设计 - 移动端 */
@media (max-width: 768px) {
  .masonry-grid {
    column-count: 1;
    padding: 1rem;
  }
  
  .preview-block {
    height: 60vh;
  }
  
  .preview-overlay {
    padding: 2rem 1rem;
  }
  
  .page-header {
    padding: 6rem 1rem 2rem;
  }
  
  .category-filters {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }
  
  .category-tag {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }
  
  nav {
    flex-direction: column;
    gap: 1rem;
  }
}

/* 加载状态 */
.loading {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.loaded {
  opacity: 1;
}

/* 图片懒加载占位 */
img[data-src] {
  background: var(--color-bg-light);
  min-height: 200px;
}