/* 移动端底部导航 */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 8px 0 5px;
}

.bottom-nav .nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #666;
    text-decoration: none;
    font-size: 12px;
    padding: 5px 0;
}

.bottom-nav .nav-item i {
    font-size: 20px;
    margin-bottom: 3px;
}

.bottom-nav .nav-item.active {
    color: var(--primary-color);
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
    .bottom-nav {
        display: flex;
        justify-content: space-around;
    }

    /* 为底部导航腾出空间 */
    main {
        padding-bottom: 60px;
    }
}