/* 头部骨架屏样式 - 用于所有页面 */
.header-skeleton {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

.skeleton-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.skeleton-logo {
  width: 150px;
  height: 40px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

.skeleton-nav {
  display: flex;
  gap: 30px;
  align-items: center;
}

.skeleton-nav-item {
  width: 80px;
  height: 20px;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

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

/* 移动端隐藏部分骨架屏元素 */
@media (max-width: 768px) {
  .skeleton-nav-item:nth-child(n + 4) {
    display: none;
  }
}

/* 头部加载完成后隐藏骨架屏 */
.header-loaded .header-skeleton {
  display: none;
}