/* 隐藏滚动条但保留功能 */
.hide-scrollbar::-webkit-scrollbar {
    display: none;
}
.hide-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}
/* 简单的淡入淡出过渡类 */
.fade-transition {
    transition: opacity 0.5s ease-in-out;
}