.yd_title h3{
        text-align: center;
    font-size: .6rem;
    font-weight: bold;
    color: #102955;
    margin-bottom: .25rem;
    display: inline-block;
}
.yd {
    background: #f5f7fa;
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    overflow-x: hidden
}

.yd .yd_tops {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
    background: #fff;
    z-index: 99;
    -webkit-box-shadow: .01rem .01rem .08rem #d2d2d2;
    box-shadow: .01rem .01rem .08rem #d2d2d2
}

.yd .yd_tops .yd_tops_box {
    background: #fff;
    padding: .25rem 0px;
    position: relative;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: distribute;
    justify-content: space-around;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    align-items: center
}
.yd .yd_tops .yd_tops_box a{
    font-size: .5rem;
    font-weight: bold;
    color: #102955;
    position: absolute;
    right: 5%;
}

.yd .yd_tops .yd_tops_box .yd_learn1_menu {
    position: absolute;
    left: 5%;
    top: 33%;
    width: .55rem
}

.yd .yd_tops .yd_tops_box .yd_learn1_logo {
    width: 1.3rem;
    display: block
}

.yd .yd_tops .yd_tops_list {
    position: absolute;
    top: 99%;
    left: 0;
    right: 0;
    margin-right: auto;
    margin-left: auto;
    background: #fff;
    border-bottom-left-radius: .5rem;
    border-bottom-right-radius: .5rem;
    padding-bottom: .2rem;
    display: none;
    padding-top: .2rem
}

.yd .yd_tops .yd_tops_list a {
    text-align: center;
    width: 95%;
    margin: 0 auto;
    font-size: .45rem;
    border-radius: .1rem;
    color: #163864;
    padding: .2rem 0px
}

.yd .yd_tops .yd_tops_list .active {
    color: #fff;
    background: #92bdf8
}

.yd .yd_tops_click {
    height: 100%;
    background: rgba(0, 0, 0, .5)
}

.yd .yd_tops_click .yd_tops_list {
    top: 5%
}

.yd .yd_tops_click .yd_tops_list {
    display: block
}

.yd_serve {
    padding: .2rem 0 .45rem;
    background: #deebfd
}

.yd_serve .yd_serve_box {
    background: #fff;
    width: 90%;
    margin: 0 auto;
    -webkit-box-shadow: .01rem .01rem .08rem #d2d2d2;
    box-shadow: .01rem .01rem .08rem #d2d2d2;
    border-radius: .2rem;
    position: relative
}

.yd_serve .yd_serve_box .yd_serve_box_all {
    display: none;
    position: absolute;
    bottom: 88%;
    left: 0;
    width: 100%;
    background: #fff;
    padding-top: .3rem;
    border-top-left-radius: .2rem;
    border-top-right-radius: .2rem
}

.yd_serve .yd_serve_box .yd_serve_box_all .yd_serve_box_top {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: distribute;
    justify-content: space-around;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    width: 90%;
    margin: 0 auto;
    background: #fff
}

.yd_serve .yd_serve_box .yd_serve_box_all .yd_serve_box_top .yd_serve_box_top_container {
    width: 45%;
    margin-bottom: .3rem
}

.yd_serve .yd_serve_box .yd_serve_box_all .yd_serve_box_top .yd_serve_box_top_container .yd_serve_box_top_container_imgs {
    -webkit-box-shadow: .01rem .01rem .08rem #d2d2d2;
    box-shadow: .01rem .01rem .08rem #d2d2d2;
    padding: .15rem 0;
    border-radius: .2rem;
    margin-bottom: .1rem
}

.yd_serve .yd_serve_box .yd_serve_box_all .yd_serve_box_top .yd_serve_box_top_container .yd_serve_box_top_container_imgs img {
    width: 90%;
    margin: 0 auto;
    display: block
}

.yd_serve .yd_serve_box .yd_serve_box_all .yd_serve_box_top .yd_serve_box_top_container .yd_serve_box_top_container_fonts {
    text-align: center;
    font-size: .4rem
}

.yd_serve .yd_serve_box .yd_serve_box_bottom {
    padding: .3rem 0px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: distribute;
    justify-content: space-around;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    width: 90%;
    margin: 0 auto
}

.yd_serve .yd_serve_box .yd_serve_box_bottom .yd_serve_box_left {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: distribute;
    justify-content: space-around;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: start;
    -ms-flex-pack: start;
    justify-content: flex-start
}

.yd_serve .yd_serve_box .yd_serve_box_bottom .yd_serve_box_left img {
    width: .55rem;
    margin-right: .2rem;
    display: block
}

.yd_serve .yd_serve_box .yd_serve_box_bottom .yd_serve_box_left div {
    color: #999;
    font-size: .4rem
}

.yd_serve .yd_serve_box .yd_serve_box_bottom .yd_serve_box_right {
    width: 7%
}

.yd_serve .yd_serve_box .yd_serve_box_bottom .yd_serve_box_right img {
    display: block;
    width: 100%
}

.yd_footer {
    padding: .2rem 0px .5rem
}

.yd_footer div {
    color: #999;
    font-size: .35rem;
    text-align: center;
    padding: .1rem 0px
}