For the font itself, look to file path –> /templates/ja_onepage/css/themes/modern/template.css
at line 3294:
h1, h2, h3, h4, h5, h6 {
font-family: 'Open Sans',sans-serif;
font-weight: 300;
}
For the “headline” specifically, look to line 2231:
h3 {
font-size: 19.5px;
line-height: 40px;
}
as well as line 2194:
h1, h2, h3, h4, h5, h6 {
color: #eb7e14
font-family: sans-serif;
font-weight: bold;
line-height: 1;
margin: 10px 0;
text-rendering: optimizelegibility;
}
For styling of the subtext description other than the font type, look to file path –>
/modules/mod_jaslideshowlite/assets/css/mod_jaslideshowlite.css
at line 80:
.ja-ss-desc {
background: none repeat scroll 0 0 rgba(255, 255, 255, 0.7);
border-radius: 2px;
box-sizing: border-box;
color: #000
font-size: 12px;
left: 20px;
line-height: 18px;
padding: 10px;
position: absolute;
text-align: left;
top: 48%;
width: 60%
}
Hope That Helps