#page {
    flex: 1;
}

/* PC 端：主内容 + 侧边栏 flex 纵排 */
#content.site-content {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
}

#primary {
    float: none;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    flex: 1 1 100%;
    transition-duration: .5s;
}

#primary.primary {
    width: 100%;
    max-width: 100%;
    flex: 1 1 100%;
}

.sidebar {
    display: none;
}