body {
    overflow-y: scroll;
}

#nav-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    column-gap: 10px;
    row-gap: 10px;
    margin: 5px;
    /* padding: 5px; */
    overflow: hidden;
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.5s cubic-bezier(0.68, 0, 0.32, 1.8);
}

#nav-container.loaded {
    display: grid;
    transform: scaleY(1);
}

.animation-container {
    max-height: 0;
    transition: max-height 0.6s ease;
    overflow: hidden;
}

.animation-container.loaded {
    max-height: 250px;
}

.nav-item {
    display: block;
    margin: 0;
    padding: 0;
    background-color: #333;
    color: wheat;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    font-size: 14px;
    overflow: hidden;
}

/* .nav-item:hover {
    background-color: #555;
} */

@media (min-width: 768px) {
    .responsive-container {
        display: grid;
        gap: 20px;
        grid-template-columns: 220px 1fr;
        /* 左侧按钮列 + 右侧内容 */
        align-items: start;
    }

    .responsive-button-list {
        display: flex;
        flex-direction: column;
        /* 按钮纵向排列 */
        gap: 8px;
        overflow-y: auto;
        /* 允许按钮列表滚动 */
        max-height: 40vh;
        position: sticky;
        top: 20px;
        /* 固定位置 */
    }
}