#main_content {}
#main_content h2 {font-size:3rem;position: relative; margin: 2rem 1.5rem;display: flex;align-items: center;font-weight:bold;color: #184d5a;}
#main_content h2 >img {margin-right:.8rem; width:1.5rem}
#main_content ul {display:flex; flex-flow:column;}
#main_content ul li {margin: 0 1.5rem 1rem;}
#main_content ul li .qa_q {background: #fff; border: 1px solid #cbcbcb; color:#333; font-size:2rem; line-height: 1.3; padding: 1.2rem; }
#main_content ul li .qa_q.on {background: #e88988; ; border: 1px solid #e88988;color: #fff;font-weight: bold;}
#main_content ul li .qa_a {border:1px solid #ccc; border-top: 0; display: none; font-size:1.8rem; line-height: 1.6; padding: 1.2rem;  color: #595959;}
#main_content ul li .qa_a.on {display: block;}