/* 导航组样式 */
.nav-group {
  margin-bottom: 1rem;
}

.nav-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: #4B5563;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.dark .nav-group-header {
  color: #E5E7EB;
}

.nav-group-header:hover {
  background-color: #F3F4F6;
}

.dark .nav-group-header:hover {
  background-color: #374151;
}

.nav-group-content {
  display: none;
  padding: 0.5rem 0;
}

.nav-group-content.expanded {
  display: block;
}

/* 导航项样式 */
.nav-group-item {
  display: block;
  padding: 0.5rem 1rem;
  margin: 0.25rem 0;
  color: #6B7280;
  text-decoration: none;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.dark .nav-group-item {
  color: #9CA3AF;
}

.nav-group-item:hover {
  color: #4B5563;
  background-color: #F3F4F6;
}

.dark .nav-group-item:hover {
  color: #E5E7EB;
  background-color: #374151;
}

/* 激活状态样式 */
.nav-group-item.active {
  color: #6D28D9;
  background-color: #EDE9FE;
  font-weight: 500;
}

.dark .nav-group-item.active {
  color: #A78BFA;
  background-color: rgba(124, 58, 237, 0.1);
}

/* 导航组激活状态 */
.nav-group.active-group .nav-group-header {
  color: #6D28D9;
  background-color: #EDE9FE;
}

.dark .nav-group.active-group .nav-group-header {
  color: #A78BFA;
  background-color: rgba(124, 58, 237, 0.1);
}

/* 箭头图标动画 */
.nav-group-header svg {
  transition: transform 0.2s ease;
}

.nav-group-header.expanded svg {
  transform: rotate(0deg);
}