body {
    background-color: #f3e3cc;
}
#lower-main {
    opacity: 0;
    transition: opacity 0.8s ease;
    color: #1b2c28;
    font-weight: 500;
}
#lower-main * {
    font-weight: 500;
}
header.is-show,
footer.is-show,
#lower-main.is-show {
    opacity: 1;
}
#lower-header {
    background-color: #17384a;
    text-align: center;
}
#lower-header img {
    max-width: 100%;
    vertical-align: bottom;
}
.sbt-wrap {
    padding: 100px 0 70px;
    text-align: center;
}
.sbt-wrap h2 {
    font-size: clamp(1.75rem, 1.069rem + 1.42vw, 2rem); /* 28-32px 768-1050px */
}
.caution {
    color: #bb0000;
    font-size: clamp(0.75rem, 0.6rem + 0.64vw, 1rem);
}
.sbt-wrap h2 + p,
.content-wrap p {
    font-size: clamp(1rem, 0.8125rem + 0.8vw, 1.25rem); /* 16-20px (375-1050px) */
}
.content-wrap h3 {
    font-size: clamp(1.125rem, 0.9375rem + 0.8vw, 1.375rem); /* 18-22px (375-1050px) */
    margin-bottom: 1.6em;
    border-left: solid 9px #1b2c28;
    border-bottom: solid 1px #1b2c28;
    padding: 0.1em 0 0.4em 0.8em;
}
.content-wrap {
    width: 90%;
    max-width: 1080px;
    margin: 0 auto;    
}
.img-fr {
    float: right;
    margin: 0.5rem 0 2rem 2rem;
}
.img-fl {
    float: left;
    margin: 0.5rem 2rem 2rem 0;
}
#lower-main .content-wrap p {
    line-height: 1.9;
    font-weight: 400;
}
.content-wrap p + p {
    margin-top: 1.1em;
}
.content-wrap .fadein-up {
    margin-bottom: 3.5em;
}
@media (max-width: 767px) {
    .sbt-wrap {
        padding: 70px 0 60px;
    }
    .img-fr,.img-fl {
        float: none;
        margin: 0 0 1rem;
    }
}