.down_head {
    position: fixed;
    top: 28px;
    width: 1200px;
    left: 50%;
    margin-left: -600px;
    z-index: 100;
}

.down_head img {
    display: block;
    width: 60px;
    height: 100%;
    float: left;
}

.down_head p {
    font-size: 18px;
    margin-top: 28px;
    color: #fff;
    float: right;
    text-align: right;
}

.down_head p span {
    padding-left: 50px;
}

.down_head p span a {
    color: #fff;
}

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

.swiper-slide {}

.slideCont {
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    width: 1050px;
    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: 50px 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: 600px;
    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: 50%;
        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: 2.25rem;
        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: 1.3rem;
        height: 1.3rem;
        margin-left: 0.05rem;
    }

    .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;
    }
}