/* 全局重置与基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 设计令牌 */
:root {
  /* 主色调 */
  --color-primary: #ffffff;
  --color-primary-light: #fafafa;
  --color-primary-medium: #f5f5f5;
  
  /* 辅助色 */
  --color-secondary: #333333;
  --color-secondary-light: #666666;
  --color-sand: #f4e8d0;
  --color-oat: #e8dcc0;
  
  /* 点缀色 */
  --color-accent: #b85c38;
  --color-accent-light: #d4a574;
  --color-sage: #7a8c7a;
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* 排版 */
  --font-size-xs: 0.875rem;
  --font-size-sm: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --font-size-xxl: 3rem;
  
  /* 圆角 */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* 基础样式 */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "思源黑体 CN Regular", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--color-secondary);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-primary-medium);
  z-index: 1000;
  transition: var(--transition-normal);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-symbol {
  width: 30px;
  height: 2px;
  background-color: var(--color-secondary);
  position: relative;
}

.logo-symbol::before,
.logo-symbol::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background-color: var(--color-secondary);
}

.logo-symbol::before {
  top: -8px;
  right: -5px;
}

.logo-symbol::after {
  bottom: -8px;
  left: -5px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent);
}

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

.nav-link.active {
  color: var(--color-accent);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
  font-family: "思源宋体 CN Light", "Noto Serif SC", serif;
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  color: var(--color-secondary);
}

h1 {
  font-size: var(--font-size-xxl);
  line-height: 1.2;
}

h2 {
  font-size: var(--font-size-xl);
  line-height: 1.3;
}

h3 {
  font-size: var(--font-size-lg);
  line-height: 1.4;
}

/* 段落 */
p {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-secondary-light);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  text-decoration: none;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  background-color: var(--color-secondary);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn:hover {
  background-color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-secondary);
  color: var(--color-secondary);
}

.btn-outline:hover {
  background-color: var(--color-secondary);
  color: var(--color-primary);
}

/* 卡片样式 */
.card {
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.card-image {
  width: 100%;
  height: 100%;
  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: var(--font-size-md);
  margin-bottom: var(--spacing-xs);
}

/* 英雄区域 */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.4));
  z-index: -1;
}

.hero-content {
  text-align: center;
  color: var(--color-primary);
  z-index: 1;
}

.hero-title {
  font-size: var(--font-size-xxl);
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeInUp 1s ease forwards;
}

.hero-subtitle {
  font-size: var(--font-size-md);
  font-weight: 300;
  opacity: 0;
  animation: fadeInUp 1s ease 0.3s forwards;
}

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

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

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

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

/* 瀑布流布局 */
.masonry {
  column-count: 3;
  column-gap: var(--spacing-md);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
}

/* 标签筛选 */
.tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.tag {
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-medium);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.tag:hover,
.tag.active {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

/* 横向滚动画廊 */
.gallery {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding: var(--spacing-md) 0;
  scroll-snap-type: x mandatory;
}

.gallery::-webkit-scrollbar {
  height: 4px;
}

.gallery::-webkit-scrollbar-track {
  background: var(--color-primary-light);
}

.gallery::-webkit-scrollbar-thumb {
  background: var(--color-secondary);
  border-radius: 2px;
}

.gallery-item {
  flex: 0 0 auto;
  width: 300px;
  scroll-snap-align: center;
}

/* 页脚 */
.footer {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--color-secondary-light);
  font-size: var(--font-size-xs);
}

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

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .masonry {
    column-count: 2;
  }
}

@media (max-width: 768px) {
  .nav-links {
    gap: var(--spacing-md);
  }
  
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-title {
    font-size: var(--font-size-xl);
  }
  
  .masonry {
    column-count: 1;
  }
}

@media (max-width: 480px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .nav-links {
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
  }
  
  .hero-title {
    font-size: var(--font-size-lg);
  }
  
  .gallery-item {
    width: 250px;
  }
}