/* 页脚 */
footer {
    background: var(--bg-secondary);
    padding: 40px 20px;
    text-align: center;
}

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

.beian {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.runtime {
    margin: 15px 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

.runtime > span {
    background: rgba(0, 0, 0, 0.1);
    padding: 6px 12px;
    border-radius: 4px;
    display: inline-block;
}