html,
body {
    margin: 0;
    padding: 0;
    background-color: #1a1a1a;
    /* 淡黑背景 */
    color: white;
    font-family: Arial, sans-serif;
    height: 100%;
    overflow-x: hidden;
    /* 允许垂直滚动 */
}

/* 背景图容器 */
.background {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #1a1a1a;
}

/* 背景图本身 */
.background img {
    display: block;
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

/* 内容覆盖层 */
.content {
    position: absolute;
    top: 24%;
    left: 49%;
    transform: translateX(-35%);
    text-align: center;
    width: 100%;
    max-width: 800px;
    /* padding-top: 60vh; */
    /* 调整按钮垂直位置 */
}

/* 按钮容器 */
.buttons {
    /* display: flex;
    justify-content: center; */
    align-items: center;
    gap: 20px;
    /* 按钮间距 */
    flex-wrap: nowrap;
    /* 强制左右排列，不换行 */
}

/* 按钮图片 */
.button img {
    width: 200px;
    margin: 20px;
    cursor: pointer;
}

/* 手机端适配（保持左右排列） */
@media (max-width: 768px) {
    .background img {
        width: 100%;
        height: auto;
    }

    /* .content {
        padding-top: 42vh;
    } */

    .buttons {
        flex-wrap: nowrap;
        justify-content: center;
        gap: 12px;
    }

    .button img {
        width: 140px;
    }

    /* 内容覆盖层 */
    .content {
        position: absolute;
        top: 24%;
        left: 40%;
        transform: translateX(-35%);
        text-align: center;
        width: 100%;
        max-width: 800px;
        /* padding-top: 60vh; */
        /* 调整按钮垂直位置 */
    }
}

.footer a{ 
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    text-align: center;
    line-height: 50px;
    font-size: 18px;
    z-index: 9999;
}