.app-header {
  background: var(--header-bg);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0, 21, 41, 0.08);
  height: 64px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
}

/* 左侧区域 */
.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Logo 区域 */
.header-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 168px;
  transition: width 0.2s;
}

.trigger {
  font-size: 18px;
  cursor: pointer;
  transition: color 0.3s;
  padding: 8px;
  border-radius: 4px;
  color: var(--text-color-secondary);
  display: flex;
  align-items: center;
}

.trigger:hover {
  color: #1677ff;
  background: rgba(22, 119, 255, 0.08);
}

/* 右侧区域 */
.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Icon Buttons */
.header-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-color-secondary);
  transition: all 0.2s;
  background: transparent;
}

.header-icon-btn:hover {
  background-color: var(--item-hover-bg);
  color: var(--text-color);
}

/* 通知面板样式 */
.header-notification-popover .ant-popover-inner-content {
  padding: 0;
}

.notification-popover {
  width: 320px;
}

.popover-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.popover-header .title {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-color);
}

.notification-list {
  max-height: 400px;
  overflow-y: auto;
}

.notification-item {
  padding: 12px 16px !important;
  cursor: pointer;
  transition: background 0.3s;
  background: var(--bg-color);
}

.notification-item:hover {
  background: var(--item-hover-bg);
}

.notification-item.unread {
  background: #e6f7ff;
}

/* Dark mode adjustment for unread */
body.dark .notification-item.unread {
  background: #111d2c;
}

.notification-item.unread:hover {
  background: #bae7ff;
}

body.dark .notification-item.unread:hover {
  background: #112a45;
}

.content-text {
  font-size: 13px;
  color: var(--text-color-secondary);
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.time {
  font-size: 12px;
  color: var(--text-color-secondary);
  opacity: 0.8;
  margin-top: 4px;
}

.popover-footer {
  padding: 8px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}