/* 语言切换浮动按钮 */
.lang-switch {
    position: fixed;
    right: 20px;
    bottom: 100px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    padding: 6px;
}

.lang-switch a {
    display: block;
    width: 36px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    text-decoration: none;
    color: #666;
    font-size: 13px;
    font-weight: bold;
    border-radius: 4px;
    transition: all 0.2s;
}

.lang-switch a:hover {
    background: #f0f0f0;
}

.lang-switch a.active {
    background: #333;
    color: #fff;
}

@media (max-width: 768px) {
    .lang-switch {
        right: 15px;
        bottom: 80px;
    }
}