/* 导航栏基础样式 */

/* 页面过渡效果 */
.page-transition-enter {
  opacity: 0;
}

.page-transition-enter-active {
  opacity: 1;
  transition: opacity 400ms ease-out;
}

.page-transition-out {
  opacity: 0;
  transition: opacity 300ms ease-in;
}

/* 导航栏固定定位样式 - 始终固定在顶部 */
#navbar-outer-container {
  position: fixed !important; /* 强制固定定位 */
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1030;
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

/* 确保页面内容不被导航栏遮挡 */
.navbar-placeholder {
  display: block !important; /* 始终显示占位符 */
}

/* 导航栏隐藏动画 */
#navbar-outer-container.navbar-hiding {
  transform: translateY(-100%);
  box-shadow: none !important;
}

/* 下拉菜单基础样式 */
.dropdown-menu {
  margin-top: 0;
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 0.5rem 0;
  transition: opacity 0.2s ease;
}

/* 基础链接样式 */
.nav-link {
  color: var(--nav-text, #333);
  text-decoration: none;
}

.nav-link.active {
  color: var(--primary-color, #0d6efd);
}

.nav-link:hover {
  color: var(--primary-color, #0d6efd);
}

/* 下拉菜单简单交互 */
@media (min-width: 992px) {
  .nav-item.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    margin-top: 0;
  }
}

/* 移动端优化 */
@media (max-width: 991.98px) {
  .navbar-collapse {
    background-color: var(--nav-bg);
    border-radius: 0 0 10px 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    max-height: 80vh;
    overflow-y: auto;
  }
  
  /* 移动端过渡效果优化 */
  .navbar-collapse.collapsing {
    overflow-y: hidden !important;
    transition: height 0.35s ease;
  }
  
  /* 修复移动端下拉菜单显示问题 */
  .navbar-collapse .dropdown-menu {
    display: block;
    background-color: transparent;
    box-shadow: none;
    padding-left: 1rem;
  }
}

/* 简化页面过渡效果 */
.page-transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  opacity: 0;
  z-index: 9999;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.page-transition-overlay.overlay-visible {
  opacity: 0.95;
}