/* 自定义CSS变量 - 设计令牌 */
:root {
  --color-primary: #f5f5f5;
  --color-secondary: #e8e8e8;
  --color-accent: #d4d4d4;
  --color-text: #333333;
  --color-text-light: #666666;
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
}

/* 全局基础样式 */
* {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: #ffffff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 悬停动画效果 */
.hover-scale {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-scale:hover {
  transform: scale(1.03);
}

/* 导航栏磨砂玻璃效果 */
.nav-blur {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.8);
}

/* 英雄区全屏高度 */
.hero-fullscreen {
  min-height: 100vh;
}

/* 瀑布流布局 */
.masonry-grid {
  column-count: 3;
  column-gap: 1.5rem;
}

@media (max-width: 1024px) {
  .masonry-grid {
    column-count: 2;
  }
}

@media (max-width: 640px) {
  .masonry-grid {
    column-count: 1;
  }
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1.5rem;
}

/* 向下箭头动画 */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

.bounce-animation {
  animation: bounce 2s infinite;
}

/* 文章卡片阴影 */
.card-shadow {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  transition: var(--transition-smooth);
}

.card-shadow:hover {
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 图片容器响应式 */
.img-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-md);
}

.img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

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

/* 加载动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 页面切换过渡 */
.page-transition {
  transition: opacity 0.3s ease-in-out;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

/* 移动端优化 */
@media (max-width: 768px) {
  .hero-fullscreen {
    min-height: 100vh;
  }
  
  .mobile-full {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
  }
}

/* 打印样式 */
@media print {
  .no-print {
    display: none !important;
  }
}