:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --light-color: #f9f9f9;
    --border-color: #eaeaea;
    --text-color: #333;
    --text-light: #7f8c8d;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    background-color: #f5f2e9;
    color: var(--text-color);
    line-height: 1.6;
    padding: 10px;
}

.bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #0a0a0a url('/mb/reps/img/pawel-czerwinski-ISgDx2aOAB8-unsplash.jpg') no-repeat center center;
    background-size: cover;
    z-index: -1;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.glass-effect {
    /* 必须配合半透明背景色 */
    background-color: rgba(138, 136, 136, 0.13); 
    
    /* 模糊 20px，饱和度提升到 180% */
    backdrop-filter: blur(2px) saturate(180%);
    
    /* 兼容 Safari */
    -webkit-backdrop-filter: blur(20px) saturate(180%); 
}