body {
    background-color: #FAFAFA;
}

.site-container {
    display: flex;
    width: 100%;
    max-width: 85rem;
    margin: 0 auto;
    min-height: 100vh;
    background-color: #FAFAFA;
}

/* 调整flex order以保持视觉布局：sidebar(左) -> middle(中) -> right-panel(右) */
.site-sidebar {
    order: 1;
}

.site-middle {
    order: 2;
}

.site-right-panel {
    order: 3;
}

.site-sidebar {
    flex: 0 0 16rem;
    height: 100vh;
    position: sticky;
    top: 0;
    background: #FAFAFA;
    overflow-y: auto;
    padding: 3rem 2.5rem;
}

.site-middle {
    flex: 1 1 auto;
    min-width: 0;
    margin: 30px 5px 30px 5px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.site-content {
    padding: 0rem;
    border-radius: 16px;
    background: #FFFFFF;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.site-right-panel {
    flex: 0 0 18rem;
    /* 固定宽度 */
    min-width: 18rem;
    /* 最小宽度 */
    height: 100vh;
    position: sticky;
    top: 0;
    background: #FAFAFA;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem 1rem 1rem 0;
}


/* 右侧自然占据剩余的 20% 空间 */

@media (max-width: 990px) {
    .site-container {
        flex-direction: column;
    }

    .site-sidebar {
        width: 100%;
        flex: none;
        height: auto;
        position: static;
        padding: 1rem;
    }

    .site-middle {
        flex: 1;
        margin: 0.5rem;
    }

    .site-right-panel {
        display: none;
        /* 在移动设备上隐藏右侧面板 */
    }
}