body {
    color: #e91e63;
    background-image: url('img/bg.png');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-position: center center;
    display: flex;
    margin: 0;
    padding: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
}
.content {
    margin-top: 60px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}
.download-buttons {
    margin-bottom: 50px; /* 控制距底部的距離 */
}
.download-buttons img {
    width: 200px;
    margin: 20px;
    cursor: pointer;
}
.navbar {
    width: 100%;
    display: flex;
    justify-content: left;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 10px 0;
    position: fixed;
    top: 0;
}
.navbar a {
    margin: 0 15px;
    text-decoration: none;
    color: #fff;
    font-size: 18px;
}
.center-image {
    display: block;
    /* margin-left: auto;
    margin-right: auto; */
    position: fixed;
    top: 50px;
    right: 20px;
    width: 20%;
    height: auto;  
}