/* 侧边菜单 */
.side-btns {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    transition: right 0.3s ease;
}

.side-btns.collapsed {
    right: -30px;
    /* 菜单宽度，根据实际图片调整 */
}

.side-btns .open {
    width: 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px 0 0 8px;
    cursor: pointer;
    box-shadow: -2px 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.side-btns .open img {
    width: 10px;
    height: 10px;
    transition: transform 0.3s ease;
}

.side-btns.collapsed .open img {
    transform: rotate(180deg);
}

.side-btns .btns {
    display: flex;
    flex-direction: column;
    /* gap: 10px; */
    /* padding: 10px; */
    /* background: rgba(255, 255, 255, 0.9); */
    border-radius: 8px 0 0 8px;
    box-shadow: -2px 2px 8px rgba(0, 0, 0, 0.1);
}

.side-btns .btn-item {
    display: block;
    width: 30px;
    transition: transform 0.2s ease;
}

.side-btns .btn-item:hover {
    transform: scale(1.05);
}

.side-btns .btn-item img {
    width: 100%;
    height: auto;
    display: block;
}