/* 设置HTML和BODY的高度以使其占满整个视口 */
html, body {
    height: 100%;
    margin: 0;
  }
   
/* 设置背景图，确保它铺满整个页面 */
body {
    background-image: url('./bg.jpg'); /* 替换为你的图片路径 */
    background-size: cover; /* 背景图片覆盖整个容器 */
    background-position: center; /* 背景图片居中 */
    background-repeat: no-repeat; /* 背景图片不重复 */
    background-attachment: fixed;

}

.download_btn_first{
    position: absolute;
    /* max-width:640px;  */
    width:100%; 
    text-align:center;
    margin: 0 auto;
    margin-top: 50px;
}

.download_btn1{
    position: absolute;
    /* max-width:640px;  */
    width:100%; 
    text-align:center;
    margin: 0 auto;
    margin-top: 130px;
}

.download_btn2{
    position: absolute;
    /* max-width:640px;  */
    width:100%; 
    text-align:center;
    margin: 0 auto;
    margin-top: 210px;
}

.download_btn_win{
    position: absolute;
    /* max-width:640px;  */
    width:100%; 
    text-align:center;
    margin: 0 auto;
    margin-top: 290px;
}

.logo{
    position: absolute;
    /* max-width:640px;  */
    width:100%; 
    text-align:center;
    margin: 0 auto;
    margin-top: 400px;
}

@media only screen and (min-width: 1025px) {
    body {
        background-image: url('./desktop-bg.jpg');
        background-size: cover; /* 背景图片覆盖整个容器 */
        background-position: center; /* 背景图片居中 */
        background-repeat: no-repeat; /* 背景图片不重复 */
        background-attachment: fixed;
    }

    .logo{
        position: absolute;
        /* max-width:640px;  */
        width:100%; 
        text-align:center;
        margin: 0 auto;
        margin-top: 150px;
    }
    
    .download_btn_first{
        position: fixed;
        bottom: 290px;
        /* max-width:640px;  */
        width:100%; 
        text-align:center;
        margin: 0 auto;
    }
    
    .download_btn1{
        position: fixed;
        bottom: 210px;
        /* max-width:640px;  */
        width:100%; 
        text-align:center;
        margin: 0 auto;
    }
    
    .download_btn2{
        position: fixed;
        bottom: 130px;
        /* max-width:640px;  */
        width:100%; 
        text-align:center;
        margin: 0 auto;
    }

    .download_btn_win{
        position: fixed;
        bottom: 50px;
        /* max-width:640px;  */
        width:100%; 
        text-align:center;
        margin: 0 auto;
    }
}



.my-btn:active{
    opacity: 0.5; /*按下去的颜色*/
}

.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    margin-bottom: 0;
    background-color: #351C60;
    color: white;
    text-align: center;
    font-size:15px; 
    line-height:30px; 
    border-top:#FFCA3C 2px solid;
  }