You can try the following code
/*general config for subtitle*/
.index-section .index-item-title:after {
color: #000;
display: block;
font-weight: lighter;
}
/*set content for subtitle item*/
.index-section:nth-child(1) .index-item-title:after {
content: 'Here is the first paragrapth for index title';
}
.index-section:nth-child(2) .index-item-title:after {
content: 'Here is the second paragrapth for index title';
}
Let me know how it goes
