/* 
 * 全局样式文件 - 高质量时尚女装展示网站
 * 风格：现代、简约、优雅、中性色调
 */

:root {
  /* 调色板 - 中性色调 */
  --color-bg: #F9F8F6; /* 米白 */
  --color-surface: #FFFFFF; /* 纯白 */
  --color-text-primary: #2C2C2C; /* 深灰 */
  --color-text-secondary: #5F5F5F; /* 中灰 */
  --color-accent: #B0A190; /* 燕麦色/卡其 */
  --color-border: #E5E5E5; /* 浅灰边框 */
  
  /* 字体系统 */
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif; /* 宋体/衬线体 */
  --font-sans: "Helvetica Neue", Arial, sans-serif; /* 无衬线体 */
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* 布局 */
  --container-width: 1200px;
  --header-height: 80px;
  
  /* 动画 */
  --transition-smooth: all 0.4s ease;
}

/* 基础重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

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

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

/* 布局容器 */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* 顶部导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(249, 248, 246, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  font-weight: bold;
}

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

.nav-link {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  padding: 5px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text-primary);
  transition: var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-primary);
}

/* 首页 - 全屏轮播图 */
.hero-slider {
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide.active {
  opacity: 1;
}

.slide-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: brightness(0.85); /* 略微压暗以突出文字 */
  transform: scale(1.05);
  transition: transform 6s ease;
}

.slide.active .slide-bg {
  transform: scale(1);
}

.slide-content {
  color: #fff;
  text-align: center;
  max-width: 800px;
  padding: var(--spacing-md);
  opacity: 0;
  transform: translateY(20px);
  transition: all 1s ease 0.5s;
}

.slide.active .slide-content {
  opacity: 1;
  transform: translateY(0);
}

.slide-text {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-style: italic;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* 内容区块通用 */
.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 1px;
  background-color: var(--color-accent);
}

/* 精选展示网格 (3x2 or 4x2) */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.grid-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.grid-img-wrapper {
  overflow: hidden;
  aspect-ratio: 3/4;
}

.grid-img-wrapper img {
  width: 100%;
  height: 100%;
  transition: transform 0.6s ease;
}

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

.grid-info {
  margin-top: var(--spacing-xs);
  text-align: center;
}

.grid-desc {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* 短文区 */
.article-section {
  background-color: var(--color-surface);
  text-align: center;
}

.article-content {
  max-width: 700px;
  margin: 0 auto;
}

.article-content p {
  font-size: 1.1rem;
  line-height: 2;
  margin-bottom: var(--spacing-md);
}

/* 页面2：衣橱精选 */
.category-nav {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.cat-btn {
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-serif);
  transition: var(--transition-smooth);
}

.cat-btn:hover, .cat-btn.active {
  border-color: var(--color-text-primary);
  background: var(--color-text-primary);
  color: #fff;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.product-card {
  margin-bottom: var(--spacing-md);
}

.product-gallery {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.product-gallery img:first-child {
  grid-row: span 2;
  height: 100%;
}

.lookbook-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.lookbook-item {
  background: var(--color-surface);
  padding: var(--spacing-sm);
}

.lookbook-imgs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin-bottom: var(--spacing-sm);
}

.lookbook-imgs img:first-child {
  grid-column: span 2;
}

/* 页面3：匠心细节 */
.craft-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0; /* 无间隙网格 */
}

.craft-item {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  group: 'craft';
}

.craft-item img {
  width: 100%;
  height: 100%;
  transition: transform 0.8s ease;
}

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

.craft-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: #fff;
  opacity: 0;
  transition: opacity 0.4s ease;
}

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

.fabric-swatches {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-sm);
}

.fabric-item {
  text-align: center;
}

.fabric-img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
  border: 1px solid var(--color-border);
}

.fabric-name {
  font-size: 0.85rem;
  font-family: var(--font-serif);
}

/* 灯箱效果 */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.98);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  max-width: 90%;
  max-height: 90vh;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 3rem;
  cursor: pointer;
  color: var(--color-text-primary);
  font-weight: 100;
  line-height: 1;
}

/* 页脚 */
.site-footer {
  text-align: center;
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
}

/* 响应式设计 */

/* 平板 (768px - 1199px) */
@media (max-width: 1199px) {
  :root {
    --container-width: 960px;
  }
  
  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .fabric-swatches {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 手机 (< 768px) */
@media (max-width: 767px) {
  :root {
    --header-height: 60px;
    --spacing-xl: 3rem;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    transform: translateY(-150%);
    transition: transform 0.4s ease;
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav-links.active {
    transform: translateY(0);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }
  
  .slide-text {
    font-size: 1.5rem;
  }
  
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  
  .product-list {
    grid-template-columns: 1fr;
  }
  
  .lookbook-grid {
    grid-template-columns: 1fr;
  }
  
  .craft-grid {
    grid-template-columns: 1fr;
  }
  
  .fabric-swatches {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .section-title {
    font-size: 1.5rem;
  }
}