/* 底部样式 */
.footer {
    background: #333;
    color: #fff;
    padding: 50px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-nav,
.footer-contact {
    flex: 1;
    min-width: 250px;
}

.footer h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    position: relative;
    padding-bottom: 10px;
}

.footer h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: #f00;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav a {
    color: #ccc;
    text-decoration: none;
    line-height: 2;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: #fff;
}

.footer-contact p {
    color: #ccc;
    line-height: 2;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #888;
}

/* 响应式底部 */
@media screen and (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }

    .footer-nav,
    .footer-contact {
        text-align: center;
    }

    .footer h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
}