body, html {  
    height: 100%;  
    margin: 0;  
    font-family: Arial, sans-serif;  
}  
  
.background-image {  
     
    background-image: url('https://amairodownload.sorasakihina.love/ev201a.png');  
    height: 100%;  
    background-position: center;  
    background-repeat: no-repeat;  
    background-size: cover;  
    position: fixed;  
    width: 100%;  
    z-index: -1;  
}  
  
.container {  
    position: relative;  
    top: 50%;  
    transform: translateY(-50%);  
    text-align: center;  
}  
  
.download-box {  
    background-color: rgba(255, 255, 255, 0.5); /* 半透明背景 */  
    padding: 20px;  
    border-radius: 10px;  
    max-width: 400px;  
    margin: 0 auto;  
}  
  
.download-box ul {  
    list-style-type: none;  
    padding: 0;  
}  
  
.download-box li {  
    margin: 10px 0;  
}  
  
.download-box a {  
    color: black;  
    text-decoration: none;  
    font-weight: bold;  
}  
  
.download-box a:hover {  
    text-decoration: underline;  
}