.container{
    width: 1200px;
    margin: 0 auto;
    text-align: left;
    letter-spacing: 1px;
    position: relative;
    font-family: PingFangSC-Regular;
}
/*头部css*/
.header{
    height: 48px;
    width: 100%;
    position: relative;
    top: 0;
    background-color: white;
    opacity: 1;
    z-index: 10;
    overflow: hidden;
}
.yd-logo{
    float: left;
    width: 111px;
    height: 48px;
    overflow: hidden;
    background: url(https://oimageb7.ydstatic.com/image?id=240240249810057946&product=xue) no-repeat;
    background-size: contain;
    background-position: 0 10px;
}
.header ul{
    float: right;
    margin-right: 10px;
}
.header li{
    float: right;
    line-height: 48px;
    margin-left: 45px;
    font-family: PingFangSC-Regular;
    font-size: 14px;
    letter-spacing: 0;
    vertical-align: middle;
}
.header li a{
    color: #333333;
}
.header li:hover a{
    color: #f94f4f !important;
}
.header .more-icon{
    display: inline-block;
    margin-top: -1px;
    margin-right: 10px;
    vertical-align: middle;
    width: 15px;
    height: 15px;
    background: url('https://oimageb1.ydstatic.com/image?id=-343423961462284359&product=xue') no-repeat;
    background-size: cover;
}
/*介绍部分css*/
.yd-introduce{
    width: 100%;
    height: 379px;
    color: white;
    padding-top: 150px;
    position: relative;
    overflow: hidden;
    -webkit-backface-visibility: hidden;  
    -moz-backface-visibility: hidden;  
    -ms-backface-visibility: hidden; 
    backface-visibility: hidden;
    -webkit-transform-style: preserve-3d;
    -webkit-transform: translate3d(0,0,0);
}
.leftbac{
    width: 50%;
    position: absolute;
    top: 0;
    left: 0;
    height: 529px;
    background-color: #f1f1f1;
    z-index: -10;
}
.rightbac{
    width: 50%;
    position: absolute;
    top: 0;
    right: 0;
    height: 529px;
    background-color: #f1f1f1;
    z-index: -10;
}
.yd-introduce .intro-back{
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-image: url(https://oimagec3.ydstatic.com/image?id=683369609881598131&product=xue);
    background-size: auto 529px;
    background-position: center -14px;
    background-repeat: no-repeat;
    transform: scale(1.1) translate3d(0,0,0);
    -webkit-transform: scale(1.1) translate3d(0,0,0);
    z-index: -5;
    margin-top: -10px;
  
}
.yd-introduce h1{
    text-align: center;
    margin: 0 auto;
    font-size: 57px;
    line-height: 74px;
    width: 570px;
    letter-spacing: 0;
    font-family: PingFangSC-Semibold;
}
.yd-introduce .intro{
    width: 100%;
    text-align: center;
    margin-top: 16px;
    line-height: 30px;
    font-family: PingFangSC-Light;
}
.intro p{
    font-size: 18px;
    width: 1018px;
    letter-spacing: 0;
    display: inline-block;
}
/*应用部分css*/
.yd-application{
    width: 100%;
    margin-top: 57px;
    overflow: hidden;
}
.yd-application .container{
    position: static;
}
.first{
    margin-top: 0 !important;
    padding-top: 0 !important;
}
.app-nav{
    width: 136px;
    float: left;
}
.app-nav li{
    width: 100%;
    height: 39px;
    padding-top: 15px;
    border-bottom: 1px solid #f1f1f1;
    font-size: 15px;
    line-height: 21px;
    cursor:pointer;
    color: #333333;
    transition: all 0.3s ease;
}
.app-nav li:hover{
    color: #f94f4f;
}
.app-details{
    width: 990px;
    margin-left: 72px;
    float: right;
}
.app-details .app-onekind{
    width: 100%;
    margin-top: 50px;
    overflow: hidden;
}
.app-onekind h4{
    font-size: 17px;
    font-weight: 400;
    height: 30px;
    border-bottom: 1px solid #f1f1f1;
    color: #333333;
}
.app-list{
    font-size: 0;
}
.app-list li{
    margin-top: 50px;
    overflow: visible;
}
.app-list .left{
    width: 350px;
    height: 85px;
    float: left;
}
.app-list .middle{
    width: 350px;
    height: 85px;
    float: left;
}
.app-list .right{
    width: 290px;
    height: 85px;
    float: left;
}
.app-list li .icon{
    display: inline-block;
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 10px;
    transition: all 0.4s ease;
    background-size: cover;
}
.app-list li .icon:hover{
    transform: scale(1.1);
    -webkit-transform: scale(1.1);
}
.app-list li .bebigger{
    width: 275px;
}
.app-list li .bebigger:hover a .icon{
    transform: scale(1.1);
    -webkit-transform: scale(1.1);
}
.noradius{
    border-radius: 0 !important;
    width: 58px !important;
    height: 58px !important;
    margin-left: -4px;
}
.app-list li .fr{
    display: inline-block;
    margin-left: 65px;
    font-size: 13px;
    line-height: 18px;
    color: #999;
    width: 210px;
    letter-spacing: 0;
}
.app-list li .title{
    font-size: 18px;
    line-height: 25px;
    font-weight: 400;
    margin-bottom: 4px;
    display: inline-block;
    color: #333333;
    overflow: hidden;
    background-repeat: no-repeat;
    background-size: contain;
    transition: all 0.3s ease;
}
.app-list .title:hover {
    color: #f94f4f;
}

@media screen and (max-width: 1280px){
    .header{
        padding-left: 40px;
        padding-right: 40px;
        width: auto;
    }
    .yd-application{
        margin-left: 40px;
        margin-right: 40px;
        width: auto;
    }
    .container{
        width: 100%;
    }
    .app-details{
        width: 82.5%;
        margin-left: 0;
    }
    .app-list .left{
        width: 50%;
        height: 75px;
    }
    .app-list .middle{
        width: 50%;
        height: 75px;
    }
    .app-list .right{
        width: 50%;
        height: 75px;
    }
}
@media screen and (max-width: 1088px){
    .intro p{
        width: calc(100% - 80px);
    }
    .app-nav{
        display: none;
    }
    .app-details{
        width: calc(100% - 80px);
        margin-left: 40px;
        margin-right: 40px;
    }
}
@media screen and (max-width: 750px){
    .app-nav{
        display: none;
    }
    .app-list .left{
        width: 100%;
        height: auto;
    }
    .app-list .middle{
        width: 100%;
        height: auto;
    }
    .app-list .right{
        width: 100%;
        height: auto;
    }
    .app-list li .fr{
        width: calc(100% - 65px);
    }
    .app-list li .bebigger{
        width: calc(100% - 65px);
    }
}
@media screen and (max-width: 650px){
    .yd-introduce h1{
        width: calc(100% - 80px);
    }
}
@media screen and (max-width: 609px){
    .yd-introduce{
        height: auto;
        background-size: auto;
    }
}

/*footer样式*/
#footer {
    background-color: #f6f6f9;
    padding: 34px 0;
    line-height: 12px;
    font-size: 12px;
    color: #929297;
    margin-top: 50px;
}
.clearfix {
    zoom: 1;
}
.wrap {
    width: 960px;
    margin: 0 auto;
}
#footer ul {
    list-style: none;
}
.about-list {
    height: 20px;
    width: 785px;
    margin: 0 auto;
}
#footer li {
    float: left;
    margin-right: 30px;
}
#footer a {
    color: inherit;
}
#footer a:hover{
    color: #000;
}
.copy-right {
    text-align: center;
    margin-top: 10px;
    float: none!important;
}
.clearfix:after {
    content: '.';
    display: block;
    visibility: hidden;
    height: 0;
    line-height: 0;
    font-size: 0;
    clear: both;
}