#main_content {}
#main_content ul {}
#main_content ul li {margin: 0rem 1.5rem 1rem; border:1px solid #ddd; border-top: none;}
#main_content ul li .qa_q {background: #fff; color:#124746; padding: 1rem; font-size:2.2rem; line-height: 1.3; font-weight: bold; border-top: 2px solid #158561;}
#main_content ul li .qa_q::before {content: "Q. "; color: #5d9201;}
#main_content ul li .qa_a {padding: 1rem; font-size:1.8rem; line-height: 1.3; display: none; border-top: 1px solid #ddd;}
#main_content ul li .qa_a.on {display: block;}