/* 基础样式 */
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  scroll-behavior: smooth;
}

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

::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #a1a1a1;
}

/* 导航栏滚动效果 */
#navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* 资源卡片悬停效果 */
.resource-card {
  transition: all 0.3s ease;
}

.resource-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 模态框动画 */
#resource-modal.active {
  opacity: 1;
  pointer-events: auto;
}

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

/* 数字计数动画 */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.count-animation {
  animation: countUp 0.6s ease-out forwards;
}

/* 骨架屏加载动画 */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
}

/* 按钮悬停效果 */
.btn-hover {
  transition: all 0.2s ease;
}

.btn-hover:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* 标签切换动画 */
.tag-active {
  background-color: #3b82f6 !important;
  color: white !important;
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}