#main_content {}
#main_content h2 {
    font-size:2.4rem;
    padding-left: 1rem;position: relative;
    margin: 2rem 1.5rem;
    font-weight: bold;
    letter-spacing: -.2rem;
}
#main_content h2::after {position: absolute; content:''; display:block; width: 0.3rem; height: 0.3rem; background: #7d87aa; border-radius:50%; left: 0; top:50%; margin-top: -0.15rem;}
#main_content ul {display:flex; flex-flow:column;}
#main_content ul li {margin: 0 1.5rem .5rem;}
#main_content ul li .qa_q {background: #fff; border: 1px solid #ddd;font-weight:900; color:#333; font-size:2rem; line-height: 1.3; padding: 1.2rem;}
#main_content ul li .qa_q.on {background: #fe8083; color:#fff;border:none}
#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;}
#main_content ul li .qa_a.on {display: block;}