.down_head{
    position: fixed;
    top:29px;
    width:1200px;
    left:50%;
    margin-left: -600px;
    z-index:100;
}
.down_head img{
    display: block;
    width:98px;
    height:44px;
    float:left;
}
.down_head p{
    font-size: 18px;
    color: #fff;
    float:right;
    text-align: right;
}
.down_head p span{
    padding-left: 50px;
}

 .swiper-container {
    width: 100%;
    height: 100%;
}
.swiper-slide {

}
.slideCont{
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    width: 1200px;
    height: 521px;
    margin: 0 auto;
    margin-top: 170px;
    flex-wrap:wrap;
    flex-direction:column;
}
.swiper-slide  h2{
    font-size: 54px;
    color:#fff;
    order:2;
    width:800px;
     flex-grow:0;
    flex-shrink:0;
    margin-top: 40px;
    margin-bottom: 40px;
}
.swiper-slide .down_pic{
    order:1;
    flex-grow:0;
    flex-shrink:0;
    width:400px;
}
.swiper-slide .down_mes{
    width: 800px;
    order:3;
    font-size: 28px;
    color:#fff;
}
.swiper-slide .down_mes p{
    float:left;
    margin-bottom: 25px;
    width: 400px;
}
.swiper-slide .down_mes .iconfont{
    font-size: 33px;
    margin-right: 12px;
}
.swiper-slide .down_dbox{
    order:4;
    width: 400px;
    margin-top: 38px;
}
.swiper-slide .down_btns{
    float: right;
}
.swiper-slide .down_btns button{
    border:none;
    background: #fff;
    width: 196px;
    height: 54px;
    line-height: 50px;
    border-radius: 54px;
    font-size: 20px;
    display: block;
    margin: 10px 0 15px 0;
    cursor: pointer;
}
.swiper-slide .down_btns button i{
    font-size: 26px;
    margin-right: 16px;
}
.swiper-slide .down_ewm img{
    width:142px;
    height:142px;
    border:solid 8px #fff;
    background: #fff;
}
.swiper-slide .down_ewm p{
    width:158px;
    font-size: 16px;
    text-align: center;
    color:#fff;
}
.down_nav{
    width: 1200px;
    height: 52px;
    position: fixed;
    bottom:0;
    left:50%;
    margin-left: -600px;
    z-index:100;
}
.down_nav li{
    float: left;
    width: 300px;
    text-align: center;
    position: relative;
    height: 52px;
    color:#fff;
    font-size: 18px;
    text-align: center;
    line-height: 52px;
}
.down_nav li span{
    display: block;
    position: absolute;
    bottom:0;
    width: 100%;
    height: 12px;
    background: #fed;
    z-index:1;
}
.down_nav li i{
    display: block;
    width: 100%;
    height: 100%;
    left: 0;
    position:absolute;
    z-index:2;
}
.down_nav li.active span{
    height: 100%;
}
.down_nav li.cheng span{
    background-color: #FF8533;
   background-image: linear-gradient(-90deg, #FF6331 0%, #FF8533 100%);
}
.down_nav li.lan span{
    background-color: #46B4E5;
    background-image: linear-gradient(-90deg, #538EEB 0%, #46B4E5 100%);
}
.down_nav li.huang span{
    background-color: #FDDB44;
    background-image: linear-gradient(-90deg, #FFBC00 0%, #FDDB44 100%);
}
.down_nav li.lv span{
    background-color: #38CE76;
    background-image: linear-gradient(-90deg, #23AF79 0%, #38CE76 100%);
}
.down_nav li:hover span{
   animation: hoverHei 0.2s 1 forwards;
}

.down_nav li.active:hover span{
    animation: none;
}
.down_slide1{
    background:url(../images/bg_cheng_pc.png) no-repeat;
    background-size: cover;
    background-color:#ff6231; 
}
.down_slide1 .icon-268{
    display: inline-block;
    width: 28px;
    height: 28px;
    background: url(../images/icon_268.png) no-repeat;
    background-size: cover;
}
.down_slide1 button{
    color:#FF6231;
}
.down_slide2{
    background:url(../images/bg_lan_pc.png) no-repeat;
    background-size: cover;
    background-color:#538EEB; 
}
.down_slide2 button{
    color:#538EEB;
}
.down_slide3{
    background:url(../images/bg_huang_pc.png) no-repeat;
    background-size: cover;
    background-color:#FFB600; 
}
.down_slide3 button{
    color:#FFB600;
}
.down_slide4{
    background:url(../images/bg_lv_pc.png) no-repeat;
    background-size: cover;
    background-color:#23AF79; 
}
.down_slide4 button{
    color:#23AF79;
}
@media screen and (min-width:1366px){
     .down_nav li.active span{
        height:52px;
    }
}
@media screen and (max-width: 1366px) and (min-width:981px){
    .slideCont{
        margin-top: 110px;
        height: 500px;
    }
    .swiper-slide  h2{
        margin: 10px 0 10px 0;
    }
    .swiper-slide .down_pic{
        width:270px;
    }
    .down_pic img{
        width:210px;
    }
    .swiper-slide .down_dbox{
        margin-top: 10px;
    }
    .down_nav li.active span{
        height:52px;
    }
}
@media screen and (max-width: 980px){
    .down_head{
        display: none;
    }
    .down_nav{
        width: 100%;
        top:0;
        bottom:auto;
        left: 0;
        margin:0;
    }
    .down_nav li{
        width: 25%;
        font-size: 0.17rem;
        height: 0.66rem;
        line-height: 0.66rem;
    }
    .down_nav li span{
        height: 0.66rem;
    }
    .down_nav li.cheng span{
       background: #FF6231;
    }
    .down_nav li.lan span{
        background:#538EEB;
    }
    .down_nav li.huang span{
        background:#FFB600;
    }
    .down_nav li.lv span{
        background:#23AF79;
    }
    .down_nav li:hover span{
        height: 0.66rem;
        animation:none;
    }
    .slideCont{
        width: 100%;
        height: 100%;
        position: relative;
    }
    .swiper-slide  h2{
        width: 100%;
        order:1;
        font-size: 0.26rem;
        text-align: center;
        margin-top: 0.35rem;
    }
    .swiper-slide .down_mes{
        width: 100%;
        order:2;
        font-size: 0.16rem;
        margin-bottom: 0.3rem;
    }
    .swiper-slide .down_mes p{
        width: 100%;
        margin-bottom: 0.05rem;
        clear: both;
        text-align: center;
    }
    .swiper-slide .down_mes p i{
        display: none;
    }
    .swiper-slide .down_pic{
        order:3;
    }
    .swiper-slide .down_pic img{
        width: 1.29rem;
        margin-left: 0.35rem;
    }
    .swiper-slide .down_dbox{
        position: absolute;
        top:2.3rem;
        left: 2rem;
    }
    .swiper-slide .down_btns{
        float: none;
    }
    .swiper-slide .down_btns button{
        width: 1.48rem;
        height: 0.4rem;
        font-size: 0.16rem;
        margin-bottom: 0.16rem;
    }
    .swiper-slide .down_btns button i{
        font-size: 0.2rem;
    }
    .swiper-slide .down_ewm img{
        width: 0.86rem;
        height: 0.86rem;
        margin-left: 0.31rem;
    }
    .swiper-slide .down_ewm p{
        width: 100%;
        text-align: center;
        font-size: 0.14rem;
        color: #fff;
    }


    .down_slide1{
        background:url(../images/bg_cheng_sj.png) no-repeat;
        background-size: cover;
    }
    .down_slide2{
        background:url(../images/bg_lan_sj.png) no-repeat;
        background-size: cover;
    }
    .down_slide3{
        background:url(../images/bg_huang_sj.png) no-repeat;
        background-size: cover;
    }
    .down_slide4{
        background:url(../images/bg_lv_sj.png) no-repeat;
        background-size: cover;
    }

}
@keyframes hoverHei{
    0%{
        height:12px;
    }
    100%{
        height: 52px;
    }
}