.sub-menu.glass-panel {
    position: fixed;
    left: calc(20px + 128px + 10px);
    top: 80px;
    bottom: unset !important;
    width: 68px;
    height: auto;
    background: rgba(45, 45, 48, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 90;
    overflow: hidden;
}
.sub-menu-list {
    width: 100%;
    display: flex;
    flex-direction: column;
}
.sub-menu-item {
    position: relative; /* 作为右上角图标定位父级 */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 4px;
    cursor: pointer;
    transition: background 0.2s ease;
}
/* 普通项悬浮浅橙 */
.sub-menu-item:hover {
    background: rgba(180, 120, 40, 0.25);
}
/* 选中常态深色 */
.sub-menu-item.active {
    background: rgba(180, 120, 40, 0.6);
}
/* 选中悬浮保持不变 */
.sub-menu-item.active:hover {
    background: rgba(180, 120, 40, 0.6);
}
.sub-menu-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}
.sub-menu-icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
    filter: brightness(0) invert(0.8);
}
.sub-menu-text {
    font-size: 12px;
    font-weight: 500;
    color: #fff;
    text-transform: uppercase;
}
/* 右上角15×15标记图标 */
.sub-mark-icon {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 15px;
    height: 15px;
}
.sub-mark-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}