::-webkit-scrollbar {
    display: none;
}

body,
html {
    padding: 0;
    margin: 0;
    background: #fff;
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
}

.scroll-snap {
    scroll-snap-align: start;
}

ul,
li {
    list-style: none;

}

a {
    text-decoration: none;
}

.pointer {
    cursor: pointer;
}

.title_wrap {
    position: relative;
    color: #1A1A1A;
    font-size: 1.875vw;
    font-weight: 500;
    padding-left: 1.7708vw;
    margin-left: 18.5938vw;
}

.title_wrap::after {
    content: '';
    position: absolute;
    width: .5208vw;
    height: 100%;
    background: #1890FF;

    top: 0;
    left: 0;
}

.contactus_title {
    width: 100%;
    background: url(../image/aboutus_bg.png) no-repeat;
    background-size: 100% 100%;
    padding-left: 22.6563vw;
    padding-top: 14.1458vw;
    padding-bottom: 11.3542vw;
}

.big_title {
    font-size: 3.3333vw;
    color: #767676;
    font-weight: 500;
}

.big_desc {
    font-size: 1.5vw;
    margin-top: .5208vw;
    color: #767676;
}

.back_top {
    display: none;
    position: fixed;
    background: #1890FF;
    z-index: 999;
    right: 5%;
    bottom: 10%;
    border-radius: .5208vw;
    padding: .5208vw;
}

.back_top img {
    width: 2.3438vw;
}