header {
    height: 6.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    padding: 1.5rem 1.5rem 3rem;
    z-index: 7777;
    background: #fff;
}
header h1 {
    width: 8rem;
}
header h1 a {
    width: 100%;
}
header h1 a img {
    width: 100%;
}
#menuBtn {
    position: absolute;
    right: 1.5rem;
}
#menuBtn img {
    width: 2rem;
}

.navBg {
    background: rgba(0, 0, 0, 0.3);
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    z-index: 8888;
}
nav {
    background-color: #fff;
    display: flex;
    flex-direction: column;
    width: 65%;
    height: 100%;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 9999;
    border-top: 1px solid #e1e1e1;
}
nav a {
    width: 100%;
    display: flex;
    flex-flow: column nowrap;
    justify-content: flex-start;
    align-items: flex-start;
    font-size: 2.5rem;
    font-weight: 700;
    padding: 2rem;
}
#closeBtn {
    height: 6.6rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1.5rem 1.5rem 3rem;
}
#closeBtn img {
    width: 1.5rem;
}


main {
    padding: 0 1.5rem 10rem;
}

footer {
    background-color: #f9f9fb;
    width: 100%;
    padding: 4rem 0;
}
footer p {
    font-size: 1.5rem;
    font-weight: 500;
    color: #5d5d5d;
    text-align: center;
    margin-bottom: 1rem;
}
footer pre {
    font-size: 1.4rem;
    font-weight: 400;
    color: #939393;
    text-align: center;
}



/* common */
h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}
h3 {
    font-size: 2.3rem;
    font-weight: 600;
    color: #fff;
    background-color: #3494f4;
    width: 100%;
    height: 7rem;
    display: flex;
    justify-content: center;
    align-items: center;
    /* margin-bottom: 4rem; */
}
h4 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}
.section.A h4:first-of-type,
.section.F h4:first-of-type,
.section.F1 h4:first-of-type,
.section.F2 h4:first-of-type {
    margin-top: 0;
}
h5 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
}
b {
    display: block;
    font-size: 1.6rem;
    font-weight: 600;
    color: #f25b39;
    margin-bottom: 1rem;
    line-height: 1.4;
}
.section.F b {
    margin-bottom: 2.5rem;
}
pre {
    font-size: 1.6rem;
    font-weight: 500;
    color: #595959;
    line-height: 1.4;
    margin-bottom: 2.5rem;
}
pre span {
    font-size: 1.6rem;
    font-weight: 500;
    color: #a5a5a5;
    line-height: 1.3;
}
.section {
    display: flex;
    flex-direction: column;
}





/* home */
.section.home {
    padding: 3rem 1.5rem;
    background-color: #fff;
    margin-bottom: 1rem;
}
.section.home h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}
.section.home h2 img {
    width: 2rem;
    margin-right: 0.5rem;
}
.section.home .blue {
    background-color: #3494f4;
    border-radius: 1rem;
    padding: 2rem 1.5rem;
    margin-top: 1.5rem;
    /* margin-bottom: 5rem; */
}
.section.home .blue h6 {
    font-size: 2.5rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1.5rem;
}
.section.home .blue p {
    font-size: 1.8rem;
    font-weight: 500;
    color: #fff;
    margin-bottom: 1.5rem;
}
.section.home .blue a {
    background-color: #fff;
    font-size: 1.6rem;
    font-weight: 700;
    color: #3494f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 6rem;
}
.section.home .blue a img {
    width: 2rem;
    margin-left: 0.5rem;
}
.section.home p {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.4;
}
.section.home p span {
    font-size: 2rem;
    font-weight: 700;
    color: #ff582b;
    line-height: 1.4;
    padding: 0 0.5rem;
}
.section.home pre {
    font-size: 1.6rem;
    font-weight: 500;
    color: #747474;
    line-height: 1.4;
    margin-bottom: 1rem;
}
.section a {
    background-color: #f25b38;
    border-radius: 1rem;
    height: 7rem;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 600;
    color: #fff;
}
.section a div {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}
.section a div span {
    font-size: 1.6rem;
    font-weight: 400;
    color: #fff;
    margin-right: 0.5rem;
}
.section a div img {
    width: 1.8rem;
}
.section.home.last a {
    margin-bottom: 1rem;
}


/* sub.php */
.section.F a.top-link,
.section.F1 a.top-link,
.section.F2 a.top-link {
    background-color: #f25b38;
    border-radius: 1rem;
    height: 7rem;
    padding: 0 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1rem;
}
/* .section.F a.top-link:nth-last-of-type(2),
.section.F1 a.top-link:nth-last-of-type(2),
.section.F2 a.top-link:nth-last-of-type(2) {
    margin-bottom: 4rem;
} */
.section.F a.top-link div,
.section.F1 a.top-link div,
.section.F2 a.top-link div {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}
.section.F a.top-link div img,
.section.F1 a.top-link div img,
.section.F2 a.top-link div img {
    width: 1.8rem;
    margin-left: 0.5rem;
}