/* ==================== 清爽简洁页脚 ==================== */
.footer {
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
    margin-top: 3rem;
    padding: 1.5rem 0 1rem;
}

.footer .footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.5fr;
    gap: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e0e0;
}

.footer .footer-col h4 {
    color: var(--primary-color);
    font-size: 0.9375rem;
    margin-bottom: 0.625rem;
    font-weight: 600;
}

.footer .footer-col p {
    color: #666;
    font-size: 0.8125rem;
    line-height: 1.5;
    margin: 0.25rem 0;
}

.footer-nav .nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25rem;
}

.footer-nav a {
    color: #666;
    text-decoration: none;
    font-size: 0.8125rem;
    padding: 0.15rem 0;
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    padding-top: 0.75rem;
    text-align: center;
    color: #999;
    font-size: 0.75rem;
}

.footer-bottom span {
    margin: 0 0.375rem;
}

.footer-bottom a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .footer {
        padding: 1.25rem 0 0.75rem;
    }
    
    .footer .footer-content {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .footer-nav .nav-links {
        grid-template-columns: 1fr 1fr 1fr;
    }
}