.m-hd, .header_demo {
    background: transparent;
}
.main_conter {
    /* padding-top: 0 !important; */
    background: #eee;
}
.about-banner img{
    width: 100%;
}
.introduce img{
    width: 100%;
}
.about-js {
    margin-bottom: 80px;
}
.a-bottom {
    position: relative;
}
.a-bottom .arraw-box {
    position: relative;
    width: 35%;
    border-top: 2px solid #717272;
    border-right: 2px solid #717272;
}

.a-bottom img{
    width: 60px;
}
.a-bottom .arraw-box .arraw {
    position: absolute;
    right: -2px;
    bottom: 0;
}
.bottom-txt {
    width: 65%;
    padding: 40px 7% 40px 4%;
    border-top: 2px solid #717272;
    font-family: 'GTAmericaRegular';
    font-size: 20px;
    line-height: 44px;
    text-indent: 2em;
    color: #221815;
}
.bottom-txt.cn {
    padding: 40px 7% 40px 4%;
    font-family: 'OPPOSansR';
    font-size: 18px;
    line-height: 44px;
    text-indent: 2em;
    color: #221815;
}
.mr-b {
    margin-bottom: 20px;
}
.a1 img{
    width: 100%;
}
.development {
    position: relative;
}
.fz-l {
    position: absolute;
    width: 270px;
    color: #747272;
    font-size: 17px;
}
.fz-l.en {
    width: 100%;
}
.fz-l-1 {
    top: 20%;
    left: 27.5%;
}
.fz-l-2 {
    top: 35%;
    left: 27.5%;
}
.fz-l-3 {
    top: 50%;
    left: 27.5%;
}
.fz-l-4 {
    top: 64.5%;
    left: 27.5%;
}
.fz-l-5 {
    top: 81.5%;
    left: 27.5%;
}
.fz-l-6 {
    top: 94%;
    left: 27.5%;
}
.fz-r {
    left: 68.6%;
}
.fz-r-7 {
    top: 20.5%;
}
.fz-r-8 {
    top: 35.5%;
}
.fz-r-9 {
    top: 50%;
}
.fz-r-10 {
    top: 65.2%;
}
.fz-r-11 {
    top: 81.5%;
}
.development img {
    width: 100%;
}
.model-box {
    flex-wrap: wrap;
    padding: 0 10%;
}
.model-box .model {
    position: relative;
    width: 33.3%;
}
.model-box .model img {
    width: 100%;
}
.model-box .model .model-txt {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    text-align: center;
}
.model-box .model .model-txt i {
    font-family: 'OPPOSansR';
    font-size: 68px;
    letter-spacing: 1px;
}
.model-box .model .model-txt span {
    font-size: 30px;
    font-weight: bold;
}
.model-box .model .model-txt .model-tip {
    padding-top: 12px;
    font-family: 'OPPOSansR';
    font-size: 17px;
    line-height: 38px;
    letter-spacing: 2px;
}
.cn-lang .en{
    display: none;
}
.en-lang .cn{
    display: none;
}
.model-box.en-lang .en{
    width: 80%;
}
.model-box.en-lang .en i{
    line-height: 36px;
}
.model-box.en-lang .en span{
    line-height: 34px;
    font-family: 'GTAmericaMedium';
    font-size: 27px;
    letter-spacing: 0;
}
.model-box.en-lang .en .model-tip{
    line-height: 34px;
    font-family: 'GTAmericaRegular';
    font-size: 16px;
    letter-spacing: 0;
}
@media (max-width: 1500px) {
    .layout-img.en-layout-img .layout-txt {
        font-size: 22px;
    }
    .model-box.en-lang .en span {
        line-height: 30px;
        font-size: 18px;
    }
    .model-box .model .model-txt i {
        font-size: 46px;
    }
    .model-box.en-lang .en .model-tip {
        line-height: 20px;
        font-size: 13px;
    }
    .model-box.en-lang .model-txt.en {
        width: 90%;
    }
    .model-box .model .model-txt span {
        font-size: 22px;
    }
    .model-box .model .model-txt .model-tip {
        font-size: 13px;
        line-height: 20px;
    }
    .model-box .model .model-txt i, .model-box .model .model-txt span {
        line-height: 30px;
    }
    .model-box .model .model-txt {
        width: 82%;
    }
    .fz-l {
        width: 204px;
        font-size: 12px;
    }
}