.section.introduce {
    background: #1C1C1C;
    color: #fff;
    overflow: hidden;
    padding: 70px 0;
}
.overview {
    width: 80%;
    margin: 340px auto;
    text-align: center;
    font-size: 19px;
    line-height: 40px;
    position: relative;
}
.overview::after,
.overview::before{
    content: "";
    background: #fff;
    position: absolute;
    top: -5%;
    left: 0;
    right: 0;
    height: 2px;
    width: 80%;
    margin: 0 auto;
}
.overview::after {
    top: unset;
    bottom: -5%;
}
.section.introduce .description {
    position: relative;
    width: 90%;
    margin: 0 auto;
    margin-bottom: 280px;
    display: flex;
}
.section.introduce .description.end {
    margin-bottom: 120px;
}
.section.introduce .description li {
    width: 55%;
    opacity: 0;
    transition: 1s all;
}
.section.introduce .description li:first-child {
    transform: translate3d(-30px,0,0);
}
.section.introduce .description li:last-child {
    transform: translate3d(30px,0,0);
}
.section.introduce .description.show li {
    opacity: 1;
    transform: translate3d(0,0,0);
}
.section.introduce .description li.img {
    width: 45%;
}
.section.introduce .description li img {
    width: 100%;
}
.section.introduce .description li h2 {
    font-size: 27px;
    font-weight: bold;
    text-align: center;
}
.section.introduce .description li p {
    padding: 30px;
    padding-left: 13%;
    font-size: 16px;
}
.section.introduce .description li p span {
    font-size: 17px;
    font-weight: bold;
}


@media screen and (min-width: 1300px) {
    .overview  {
        font-size: 1.5vw;
    }
    .section.introduce .description li h2 {
        font-size: 2.5vw;
    }
    .section.introduce .description li p {
        font-size: 1.3vw;
    }
    .section.introduce .description li p span {
        font-size: 1.4vw;
    }
}

@media screen and (max-width: 768px) {
    .section.introduce {
        padding: 30px 0;
    }
    .overview  {
        width: 90%;
        font-size: 15px;
        line-height: 26px;
        text-align: unset;
        margin: 200px auto;
    }
    .overview p {
        padding: 0 2%;
    }
    .overview::after,
    .overview::before {
        width: 100%;
    }
    .section.introduce .description {
        flex-direction: column;
        margin-bottom: 150px;
        position: relative;
    }
    .section.introduce .description::after {
        content: "";
        height: 2px;
        width: 100%;
        position: absolute;
        bottom: -10%;
        left: 0;
        right: 0;
        background: #fff;
    }
    .section.introduce .description.end::after {
        content: unset;
    }
    .section.introduce .description li {
        width: 100%;
        order: 2;
    }
    .section.introduce .description li.img {
        width: 100%;
        order: 1;
    }
    .section.introduce .description li h2 {
        margin: 20px 0;
        margin-bottom: 30px;
        font-size: 24px;
    }
    section.introduce .description li p {
        padding: 0!important;
        font-size: 15px;
    }
}