<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
*{
margin: 0;
padding: 0;
}
.a {
height: 20px;
background-color: #4f7197;
}
@media screen and (max-aspect-ratio: 16/10){
.a {
height: 50px;
}
}
@media screen and (max-aspect-ratio: 4/3){
.a {
height: 100px;
}
}
</style>
</head>
<body>
<div class="a"></div>
</body>
</html>
