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

/* 根变量定义 */
:root {
  /* 主色调 - 中性色系 */
  --primary-black: #1a1a1a;
  --primary-white: #ffffff;
  --primary-gray: #808080;
  --light-gray: #f5f5f5;
  --medium-gray: #666666;
  --warm-beige: #f4f1ea;
  --taupe: #483c32;
  
  /* 点缀色 - 低饱和度 */
  --deep-blue: #2c3e50;
  --dark-red: #8b2635;
  --olive-green: #556b2f;
  
  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  
  /* 阴影 */
  --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-medium: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-heavy: 0 8px 24px rgba(0,0,0,0.2);
  
  /* 过渡 */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-quick: all 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--primary-black);
  background-color: var(--primary-white);
  overflow-x: hidden;
}

/* 标题样式 */
h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 300;
  letter-spacing: 0.03em;
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  font-weight: 400;
  margin-bottom: var(--spacing-xs);
}

p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
  color: var(--medium-gray);
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding: var(--spacing-sm) 0;
  transition: var(--transition-smooth);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  width: 40px;
  height: 40px;
  background: var(--primary-black);
  border-radius: 50%;
  transition: var(--transition-quick);
}

.navbar-logo:hover {
  transform: scale(1.1);
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.navbar-link {
  text-decoration: none;
  color: var(--primary-black);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: var(--transition-quick);
  position: relative;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary-black);
  transition: var(--transition-quick);
}

.navbar-link:hover::after {
  width: 100%;
}

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

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

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

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

.hero-content h1 {
  color: var(--primary-white);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
  color: var(--primary-white);
  font-size: 1.2rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 卡片组件 */
.card {
  background: var(--primary-white);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: pointer;
}

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

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

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

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

.card-title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--primary-black);
}

.card-text {
  font-size: 0.9rem;
  color: var(--medium-gray);
}

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

.grid-cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 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);
}

.masonry-item img {
  width: 100%;
  border-radius: 8px;
  transition: var(--transition-quick);
}

.masonry-item img:hover {
  transform: scale(1.02);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-black);
  color: var(--primary-white);
  text-decoration: none;
  border-radius: 4px;
  transition: var(--transition-quick);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

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

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

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

/* 标签样式 */
.tags {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--light-gray);
  border-radius: 20px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-quick);
}

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

/* 模态框样式 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  cursor: pointer;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-quick);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* 文章列表样式 */
.article-list {
  display: grid;
  gap: var(--spacing-lg);
}

.article-item {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: 8px;
  transition: var(--transition-smooth);
}

.article-item:hover {
  background: var(--light-gray);
  transform: translateX(4px);
}

.article-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
}

.article-content h3 {
  margin-bottom: var(--spacing-xs);
}

.article-content a {
  color: var(--primary-black);
  text-decoration: none;
  transition: var(--transition-quick);
}

.article-content a:hover {
  color: var(--deep-blue);
}

/* 页脚 */
.footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--medium-gray);
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar-menu {
    gap: var(--spacing-md);
  }
  
  .navbar-link {
    font-size: 0.85rem;
  }
  
  .masonry {
    column-count: 2;
  }
  
  .grid-cols-3 {
    grid-template-columns: 1fr;
  }
  
  .article-item {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .navbar-menu {
    gap: var(--spacing-sm);
  }
  
  .masonry {
    column-count: 1;
  }
  
  .hero-content {
    padding: var(--spacing-sm);
  }
}

/* 辅助类 */
.text-center {
  text-align: center;
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.hidden {
  display: none;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 视差滚动效果 */
.parallax {
  position: relative;
  overflow: hidden;
}

.parallax-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 120%;
  will-change: transform;
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--light-gray);
  border-top: 2px solid var(--primary-black);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}