.md-footer {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
}

.md-footer--in-content {
    opacity: 1;
    visibility: visible;
    margin: 0 0.8rem;
}

.md-main .md-footer {
    margin-top: 3rem;
    background-color: transparent;
}

.md-footer-meta {
    display: none;
    background-color: transparent;
}

.md-main .md-footer__inner {
    display: grid;
    /* 1 * 2 */
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 0 0 2rem 0;
    margin: 0 auto;
}

.md-main .md-footer__link {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    border: 1px solid var(--color-gray-300);
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px var(--color-gray-100);
    margin: 0;
}

.md-main .md-footer__link:hover {
    border-color: var(--color-blue-300);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
    text-decoration: none;
}

.md-main .md-footer__link--prev {
    justify-content: flex-start;
    text-align: right;
}

.md-main .md-footer__link--next {
    justify-content: flex-end;
    text-align: left;
}

.md-main .md-footer__title {
    display: flex;
    flex-direction: column;
    padding: 0;
    margin: 0;
}

.md-main .md-footer__direction {
    font-size: var(--text-xs);
    color: var(--color-gray-800);
    transform: scale(0.9);
}

.md-main .md-footer__link--prev .md-footer__direction {
    transform-origin: right;
}

.md-main .md-footer__link--next .md-footer__direction {
    transform-origin: left;
}

/* 页面标题 */
.md-main .md-footer__title .md-ellipsis {
    font-size: var(--text-sm);
    color: var(--color-black);
}

.md-main .md-footer__button {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
}

.md-main .md-footer__button svg {
    width: 1rem;
    height: 1rem;
    fill: var(--color-gray-500);
}

.md-main .md-footer__link:hover .md-footer__button svg {
    fill: var(--color-blue-500);
}

@media (min-width: 76.25rem) {
    .md-footer {
        margin-left: 2.8rem;
        margin-right: 2.8rem;
    }
}

@media (max-width: 76.25rem) {
    .md-main .md-footer__inner {
        grid-template-columns: repeat(1, 1fr);
    }
}