/* 字体设置 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500&display=swap');

:root {
  --font-chinese: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

body {
  font-family: var(--font-chinese);
  font-weight: 300;
  color: #000;
  background: #fff;
}

/* 图片悬停效果 */
.hover-scale {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hover-scale:hover {
  transform: scale(1.02);
  opacity: 0.95;
}

.hover-overlay {
  position: relative;
  overflow: hidden;
}

.hover-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.05);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.hover-overlay:hover::after {
  opacity: 1;
}

/* 导航悬停效果 */
.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: #000;
  transition: width 0.3s ease;
}

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

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

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
}

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

/* 图片网格布局 */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* 模态框样式 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1000;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  max-width: 90%;
  max-height: 90%;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal.active .modal-content {
  transform: scale(1);
}

/* 文章卡片样式 */
.article-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 筛选按钮样式 */
.filter-btn {
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.filter-btn.active {
  background: #000;
  color: #fff;
}

.filter-btn:hover:not(.active) {
  border-color: #000;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .image-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
  }
  
  .carousel-container {
    height: 70vh;
  }
}

@media (max-width: 480px) {
  .image-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    max-width: 95%;
    max-height: 95%;
  }
}

/* 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 forwards;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f5f5f5;
}

::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #999;
}