.back_btn_sec{font-family:Noto Sans JP,serif;padding:64px 0}.back_btn{margin:auto;max-width:260px;text-align:center;width:100%}.back_btn_link{background-color:#fff;border:3px solid #152246;border-radius:10px;color:#152246;display:block;font-size:20px;font-weight:700;padding:15px 0;text-decoration:none}.back_btn_link:hover{background-color:#152246;color:#fff}@media only screen and (max-width:980px){.back_btn_sec{padding:40px 0}.back_btn_link{font-size:18px;padding:10px 0}}@media only screen and (max-width:680px){.back_btn_sec{padding:30px 0}.back_btn_link{font-size:16px;padding:8px 0}}