.main_title h2 {display: flex;font-size: 2.3rem;padding: 2rem 1.4rem 1rem;font-weight: bold;align-items: center;}
.main_title h2 img {width: 1rem;margin-right: 0.5rem;}

.content_wrap div h3 { position:relative;display: flex;align-items: center;justify-content: space-between;}
.content_wrap div h3 span{font-size:2rem; font-weight: 800; color:#222; line-height: 1.5;}
.content_wrap div h3 span img {width:1rem; margin-right:.5rem}

 .content_wrap div {border: 1px solid #eee;margin: 1rem 1.4rem;padding:1.4rem; border-radius: 0.5rem;}
 .content_wrap div:nth-child(2n) {background:#e4eef7} 
 .content_wrap div.on h3 > img {display:none;}

 .content_wrap div pre {display: none; height:0;opacity:0;font-size: 1.8rem;line-height: 1.3;}
 .content_wrap div.on pre {display: block; height:100%; transition:.5s;opacity:1;margin-top: 1rem;}