Adjusted the global CSS code to include below snippet to load CSS file from JSDelivr CDN.
@font-face {
font-family: 'Roboto Slab';
font-display: swap;
font-style: normal;
font-weight: 400;
src: local('Roboto Slab Regular'), local('RobotoSlab-Regular'), url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/robotoslab/RobotoSlab-Regular.ttf');
}
@font-face {
font-family: 'Roboto Slab';
font-display: swap;
font-style: normal;
font-weight: 700;
src: local('Roboto Slab Bold'), local('RobotoSlab-Bold'), url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/robotoslab/RobotoSlab-Bold.ttf');
}
@font-face {
font-family: 'PT Serif';
font-display: swap;
font-style: normal;
font-weight: 400;
src: local('PT Serif'), local('PTSerif-Regular'), url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/ptserif/PT_Serif-Web-Regular.ttf');
}
@font-face {
font-family: 'PT Serif';
font-display: swap;
font-style: normal;
font-weight: 700;
src: local('PT Serif Bold'), local('PTSerif-Bold'), url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/ptserif/PT_Serif-Web-Bold.ttf');
}
@font-face {
font-family: 'icomoon';
font-display: swap;
src: url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/icomoon.eot');
src: url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/icomoon.eot') format('embedded-opentype'),
url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/icomoon.ttf') format('truetype'),
url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/icomoon.woff') format('woff'),
url('https://cdn.jsdelivr.net/wp/plugins/accelerated-mobile-pages/tags/0.9.97.9/templates/design-manager/design-3/fonts/icomoon.svg') format('svg');
font-weight: normal;
font-style: normal;
}