<style>
/* Media
======================*/
/* Intro*/
@media all and (max-width: 1200px) {
.intro__subtitle {
font-size: 8px;
}
}
</style>
<!-- Intro -->
<div class="intro" id="Intro">
<div class="container">
<div class="intro__inner">
<div class="intro__onas"></div>
<h2 class="intro__subtitle">ТЕКСТ ТЕКСТ</h2><html>
<head></head>
<body>
<head></head>
<div id="container">
...
</div>
</body>@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
/* Ваш css код */
}