* {
    box-sizing: border-box;
}
div{
    margin: 0;
    padding: 0;
}
.about,.contact{
    padding-top: 0px!important;
    background-image: none;
    background: #fff;
}
.declare,.terms{
    background: #f8fafc;
}
.content {
    display: flow-root;
    box-sizing: content-box;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 15px;
    padding-right: 15px;
}
#about {
    margin-bottom: 100px;
    height: 600px;
    color: #fff;
    background: #fff url(/static/images/115/about_bg.jpg) center top no-repeat;
    padding-top: 1px;
    background-size: cover;
}
#about .top-ad {
    height: 516px;
    width: 100%;
}
#about .summary {
    padding: 67px 30px 0 120px;
    color: #fff;
    font-family: PingFangSC-Regular;
    display: block;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
#about .summary h2 {
    margin-bottom: 15px;
    font-size: 32px;
    font-weight: 400;
    line-height: 50px;
}
#about .summary p {
    font-size: 15px;
    font-weight: 400;
    line-height: 36px;
    letter-spacing: 1px;
    max-width: 771px;
}
@media screen and (max-width: 1920px) {
    #about {
        margin-bottom: 100px;
        background-size: auto 520px;
    }
}
@media screen and (max-width: 1024px) {
    #about {
        background: #fff url(/static/images/115/about_bg2.png) center top no-repeat;
        background-size: 100% 78%;
    }
}
@media (max-width: 899px) {
    .header{
        height: auto;
        display: inherit;
    }
}
@media screen and (max-width: 768px) {
    #about {
        height: auto;
        background: #fff url(/static/images/115/about_bg3.png) top center no-repeat;
        background-size: 100% 100%;
    }
    #about .top-ad {
        height: auto;
    }
    #about .summary {
        padding: 40px 30px 80px;
    }
    #about .summary h2 {
        font-size: 24px;
        margin-bottom: 10px;
    }
    #about .summary p {
        font-size: 14px;
        line-height: 22px;
    }
}