.home-box{
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

.home-box .top-banner{
    position: relative;
    height: 75%;
    width: 100%;
    min-width: 1200px;
}
.home-box .top-banner .slick-list{
    height: 100%;
}
.home-box .top-banner .slick-track{
    height: 100%;
}
.home-box .top-banner .background-img{
    height: 100%;width: 100%;
    /*position: absolute;*/
    /*top: 0;left: 0;*/
    object-fit: fill;
}
.home-box .top-banner .prev,.home-box .top-banner .next{
    position: absolute;
    height: 50px;width: 50px;
    background-color: inherit;
    line-height: 50px;
    text-align: center;
    border-radius: 4px;
    color: #347780;
    font-size: 25px;
    z-index: 10;
    cursor: pointer;
    background-image: url(../images/cssbyy_new/dots-bg.svg);
    background-size: 240%;
    overflow: hidden;
    background-position: center;
}
.home-box .top-banner .prev{bottom: 30px;right: 15%;}
.home-box .top-banner .next{bottom: 30px;right: 10%;}
.home-box .csbyy-header-logo img{
    width: 468px;
    height: 86px;
    position: absolute;
    left: 50%;
    top: 30px;
    margin-left: -234px;
    z-index: 11;
}
.home-box .bottom-message{
    position: relative;
    height: 25%;
    width: 100%;
    background-image: url(../images/cssbyy/index-bot_bg.jpg);
}
.home-box .bottom-message>img{
    height: 100%;
    position: absolute;
    left: 0;top: 0;
}
.bottom-message .nav-list{
    height: 140px;
    width: 485px;
    margin: 0 auto;
    position: relative;
    top: -60px;
    justify-content: space-between;
    align-items: center;
    display: flex;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s;
}
.bottom-message .nav-list div.home_btn{
    position: relative;
    width: 90px;height: 90px;
    background-color: #83BFB1;
    border-radius: 50%;
    display: flex;justify-content: center;align-items: center;
    transition: all 0.3s;
}
.bottom-message .nav-list div.home_btn img{
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.5s;
}
.bottom-message .nav-list div.home_btn:hover{
    transform: scale(1.1);
}
.bottom-message .nav-list div.home_btn:hover .hover_img img{
    opacity: 1;
    transform: scale(1.1);
}
.bottom-message .nav-list div.home_btn .hover_img {
    height: 98px;
    width: 98px;
    position: absolute;
    top: -5px;
    left: -5px;
    animation-name: corrotate;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
}
.bottom-message .nav-list div.home_btn .hover_img img{
    height: 100%;width: 100%;
}
@keyframes corrotate {
    to {
        transform: rotate(360deg);
    }
}
.bottom-message .nav-list div.inner_home_btn span{
    font-family: "宋体 常规", 宋体, sans-serif;
    font-weight: 400;
    font-style: normal;
    font-size: 24px;
    color: #fff;
    display: block;
    line-height: 26px;
}
.bottom-message .nav-list div.home_btn .inner_home_btn{
    height: 86px;width: 86px;box-sizing: border-box;
    border-radius: 50%;border: 1px solid rgba(255, 255, 255, 0.3);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    align-content: center;
}
.bottom-message .nav-list a:nth-child(2) div.home_btn{
    height: 140px;
    width: 140px;
    background-color: inherit;
    background-image: url(../images/cssbyy/to_home.png);
    background-size: 111%;
    background-position: center;
}
.bottom-message .nav-list a:nth-child(2) div.home_btn .go_home_btn span{
    font-family: "宋体 常规", 宋体, sans-serif;
    font-weight: 400;
    font-style: normal;
    font-size: 36px;
    line-height: 46px;
    color: #fff;
    display: block;
}
.bottom-message .nav-list a:nth-child(2) div.home_btn:hover{
    transform: scale(1);
}
.bottom-message .nav-list a:nth-child(2) div.home_btn .hover_home_img{
    opacity: 1;
    height: 154px;
    width: 154px;
    position: absolute;
    top: -7px;
    left: -7px;
}
.bottom-message .nav-list a:nth-child(2) div.home_btn:hover .hover_home_img{
    animation-name: corrotate;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
}
.bottom-message .nav-list a:nth-child(2) div.home_btn .hover_home_img img{
    transform: scale(1);
    transition: all 1s;
    opacity: 1;
    height: 100%;width: 100%;
}
.bottom-message .csbyy-index-footer-msg{
    text-align: center;
    width: 1300px;
    position: absolute;
    text-align: center;
    margin-top: 30px;
    left: 50%;
    bottom: 10px;
    margin-left: -650px;
}
.bottom-message .csbyy-index-footer-msg span{
    font-size: 14px;
    color: #9DB7B1;
    display: inline-block;

}
.bottom-message .csbyy-index-footer-msg span:nth-child(n + 2){
    margin-left: 10px;
}
.bottom-message .csbyy-index-footer-msg span a{
    color: #9DB7B1;
}
.index_btn_hover{
    position: absolute;
    transition: all 0.3s;
    height: 103px;
    width: 114px;
    opacity: 0;
    left: 0;
    top: 0;
}
.index_btn_hover img{
    width: 100%;height: 100%;
}