How to include full font?

Question

css

Good afternoon, I can’t understand why font-weight only works in two modes:

Although from the same browser I open google fonts (where I got it from) a demonstration of the font and all the values ​​​​work for them: I include

the font in css like this:

@import url('https://fonts.googleapis.com/css?family=Montserrat&display=swap');

in css properties I set it like this:

.el {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
}

Answer 1

<link href="https://fonts.googleapis.com/css?family=Montserrat:100,100i,200,200i,300,300i,400,400i,500,500i,600,600i,700,700i,800,800i,900,900i&display=swap&subset=cyrillic,cyrillic-ext,latin-ext" rel="stylesheet">

CUSTOMIZE tab in the selected fonts window