/* 页脚 */
footer {
    background-color: #0a0a0a;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 0, 255, 0.2);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #ff00ff, #00ffff, #ff00ff, transparent);
    animation: gradientShift 3s ease infinite;
}

footer p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 16px;
    letter-spacing: 2px;
}