/* Sticky 搜索框 */
.sticky-search-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: white;
  border-bottom: 1px solid #e5e7eb;
  padding: 1rem;
  transition: all 0.3s ease;
}

.sticky-search-bar.scrolled {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 0.5rem 1rem;
}

/* 搜索框容器 */
.sticky-search-container {
  display: flex;
  gap: 1rem;
  max-width: 100%;
}

/* 搜索输入 */
.sticky-search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  font-size: 1rem;
}

/* 底部导航 (移动端) */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid #e5e7eb;
  z-index: 40;
}

.bottom-nav-items {
  display: flex;
  justify-content: space-around;
  gap: 1rem;
}

.bottom-nav-item {
  flex: 1;
  padding: 1rem 0;
  text-align: center;
  cursor: pointer;
  border-top: 3px solid transparent;
  transition: all 0.3s;
}

.bottom-nav-item.active {
  border-top-color: #3b82f6;
  color: #3b82f6;
}

.bottom-nav-item:hover {
  background: #f9fafb;
}

/* 移动端显示底部导航 */
@media (max-width: 768px) {
  .bottom-nav {
    display: block;
  }
  
  .sticky-search-bar {
    top: auto;
    bottom: auto;
  }
  
  body {
    padding-bottom: 70px;
  }
}