main {
    background: #ededed;
}
main .title_wrap {
    padding: 3.5rem 5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
    background: #fff;
    position: relative;
}
main .title_wrap h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: .5rem;
    color: #2c3134;
}
main .title_wrap .exp {
    font-size: 1.6rem;
    color: #666;
    line-height: 1.4;
}
main .title_wrap button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2rem;
    text-indent: -9999px;
}
main .title_wrap .prev {
    left: 1.2rem;
    background: url("../images/prev2.png") no-repeat center / contain;
}
main .title_wrap .next {
    right: 1.2rem;
    background: url("../images/next.png") no-repeat center / contain;
}
main .idiom_wrap {
    padding: 2.5rem 1.5rem;
    background: #ededed;
    border-top: 1px solid #ddd;
}
main .idiom_wrap ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}
main .idiom_wrap ul li {
    background: #fff;
    text-align: center;
    border-radius: .5rem;
    overflow: hidden;
}
main .idiom_wrap ul li .character {
    font-size: 23vw;
    font-weight: 600;
    padding: 2rem;
}
main .idiom_wrap ul li .exp {
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    background: #f99f62;
    padding: .6rem 0;
}
main .idiom_wrap ul li .exp span {
    color: #fff;
}
main .idiom_wrap ul li .exp .mean {
    font-size: 1.8rem;
}
main .idiom_wrap ul li .exp .sound {
    font-size: 2.5rem;
    font-weight: 600;
}
main .book_wrap {
    padding: 1.5rem;
    padding-top: 0;
}
main .book_wrap .bookmark {
    display: block;
    font-size: 1.7rem;
    color: #f4b060;
    border: 1px solid #f4b060;
    background: #fff8e9 url("../images/book_off.png") no-repeat 92% 50% / 2rem;
    padding: 1rem;
    padding-right: 3.6rem;
    border-radius: .8rem;
    margin-left: auto;
}
main .book_wrap .bookmark.on {
    background: #fff8e9 url("../images/book_on.png") no-repeat 92% 50% / 2rem;
}