body{margin:0;font-family:Arial;background:#f5f7fa}
header{background:#005baa;color:#fff;padding:10px}
.top{max-width:1200px;margin:auto;display:flex;justify-content:space-between}
.lang button{margin-left:5px}
.slider{height:400px;position:relative}
.slide{position:absolute;inset:0;background-size:cover;opacity:0;transition:.8s}
.slide.active{opacity:1}
.txt{position:absolute;bottom:40px;left:40px;color:#fff;font-size:28px;background:rgba(0,0,0,.5);padding:10px}
footer{text-align:center;padding:15px;background:#003d7a;color:#fff}