/* 底部导航 */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    background: var(--dark-light);
    padding: 8px 0;
    z-index: 100;
    border-top: 1px solid var(--gray);
    max-width: 1000px;
    margin: 0 auto;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--light-gray);
    font-size: 12px;
    transition: var(--transition);
    padding: 6px 12px;
    border-radius: 8px;
}

.nav-item.active, .nav-item:hover {
    color: var(--primary);
    background: rgba(229, 9, 20, 0.15);
}

.nav-item i {
    font-size: 18px;
    margin-bottom: 4px;
}