.footer {
    background: var(--bg-card, #f4f6f8);
    border-top: 1px solid var(--border-color, var(--line));
    color: var(--text-secondary, #6f7580);
    font-size: 12px;
    text-align: center;
    padding: 12px 0;
    transition: background 0.3s ease, color 0.3s ease;
}