Add this code to the Custom CSS field on the Appearance tab of your FAQ widget’s settings:
.eui-widget-title{margin-bottom: 32px;}
.eapps-faq-content-category-title{margin-top: 32px; margin-bottom: 16px;}
.eapps-faq-content-category{margin-top: 32px;}
.eapps-faq-content-category-item-question{padding:20px;}
.eapps-faq-content-category-item-active .eapps-faq-content-category-item-answer{padding:0 20px 12px 20px;}