/* 侧边栏手风琴 - 增强分组标题的可点击视觉 */
aside h2.select-none {
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.15s;
}
aside h2.select-none:hover {
  background-color: rgba(0, 0, 0, 0.04);
}
.dark aside h2.select-none:hover {
  background-color: rgba(255, 255, 255, 0.06);
}
.sslx-arrow {
  display: inline-block;
  font-size: 10px;
  opacity: 0.4;
  transition: transform 0.2s ease, opacity 0.15s;
}
aside h2.select-none:hover .sslx-arrow {
  opacity: 0.9;
}