This should do it:
.sqs-block-content p {
border-bottom: 2px solid #E2E7F5;
}
This will add the same style border to the bottom of the <p>
element.
UPDATE
Add an id
to the <p>
tag and then apply similar CSS to it. Like so:
#your_id {
border-bottom: 2px solid #E2E7F5;
}