How to get option values without requiring wp-load?

You could use Hooks ,
If you wish to print some styles in head just try

add_action('wp_head', 'test_123');

function test_123(){
    $options = get_option('option');
    //Output it however you want :)
    ob_start();
    ?>
    <style type="text/css" id="someStyleInHead">
        body.home{
            font-size: <?php echo $options['fs_h']; ?>;
        }
    </style>
    <?php
    $code = ob_get_clean();
    echo $code;
}

I hope it help 🙂