/* 全局样式 - 现代时尚男装网站 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* 设计令牌 */
:root {
  /* 色彩系统 */
  --color-primary: #1A1A1A;
  --color-secondary: #FFFFFF;
  --color-accent: #E5E5E5;
  
  /* 字体系统 */
  --font-chinese: 'Noto Sans SC', sans-serif;
  --font-english: 'Inter', sans-serif;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  
  /* 圆角系统 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* 动画系统 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 阴影系统 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-chinese), var(--font-english), sans-serif;
  background-color: var(--color-secondary);
  color: var(--color-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航样式 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.nav-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-normal);
}

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

/* 轮播图样式 */
.carousel {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

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

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

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

.carousel-content {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--color-secondary);
  z-index: 2;
}

.carousel-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp var(--transition-slow);
}

.carousel-subtitle {
  font-size: 1.25rem;
  font-weight: 300;
  animation: fadeInUp var(--transition-slow) 0.2s both;
}

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

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

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

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

/* 卡片样式 */
.card {
  background: var(--color-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-normal);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: var(--transition-normal);
}

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

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

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.card-description {
  color: #666;
  font-size: 0.95rem;
}

/* 分类标签 */
.tabs {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-accent);
  overflow-x: auto;
}

.tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  color: var(--color-primary);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
  border-bottom: 2px solid transparent;
}

.tab:hover {
  color: var(--color-primary);
}

.tab.active {
  border-bottom-color: var(--color-primary);
}

/* 内容区域 */
.content-section {
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

/* 图片展示 */
.image-showcase {
  display: grid;
  gap: var(--spacing-md);
}

.image-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.image-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: var(--transition-normal);
}

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

.image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: var(--color-secondary);
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: var(--transition-normal);
}

.image-item:hover .image-overlay {
  transform: translateY(0);
}

/* 画廊样式 */
.gallery-theme {
  margin-bottom: var(--spacing-xl);
}

.gallery-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.gallery-images {
  display: grid;
  gap: var(--spacing-sm);
}

.gallery-panorama {
  grid-template-columns: repeat(6, 1fr);
}

.gallery-vertical {
  grid-template-columns: repeat(5, 1fr);
}

.gallery-diamond {
  grid-template-columns: repeat(4, 1fr);
}

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

/* 页脚 */
.footer {
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-secondary);
  margin-top: var(--spacing-xl);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-normal);
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-primary);
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-secondary);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: #333;
  transform: translateY(-4px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .carousel-title {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-secondary);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .grid-4,
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .carousel-title {
    font-size: 2rem;
  }
  
  .carousel-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .gallery-panorama {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .gallery-vertical {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .gallery-diamond {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .gallery-large {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .carousel-title {
    font-size: 1.5rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .content-section {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .tabs {
    padding: var(--spacing-sm);
  }
  
  .gallery-panorama,
  .gallery-vertical,
  .gallery-diamond {
    grid-template-columns: 1fr;
  }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #FFFFFF;
    --color-secondary: #1A1A1A;
    --color-accent: #333333;
  }
  
  .navbar {
    background: rgba(26, 26, 26, 0.95);
  }
  
  .card {
    background: #2A2A2A;
  }
  
  .card-description {
    color: #CCCCCC;
  }
}