/* 页脚样式 */
footer {
    background: #0c1622;
    padding: 50px 0 20px;
    margin-top: 60px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

footer .container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column {
    min-width: 220px;
}

.footer-column h3 {
    color: #4ecca3;
    margin-bottom: 20px;
    font-size: 20px;
}

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

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column ul li a:hover,
.footer-column ul li a:focus {
    color: #4ecca3;
    outline: none;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #777;
    font-size: 13px;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-column h3 {
        font-size: 18px;
    }
}