@charset "utf-8";
.banner{
    position: relative;
    width: 100%;
    height: 830px;
    overflow: hidden;
}
.banner_bd li{
    position: relative;
    width: 100%;
    height: 830px;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
}
.banner_bd .bg1{
    background-image: url(../images/banner1.png);
}
.banner_bd .bg2{
    background-image: url(../images/banner2.png);
}
.banner_bd .bg3{
    background-image: url(../images/banner3.png);
}
.banner_bd .bg4{
    background-image: url(../images/banner4.png);
}
.banner_hd{
    position: absolute;
    z-index: 20;
    width: 100%;
    left: 0;
    bottom: 40px;
}
.banner_hd li{
    font-size: 0;
    width: 8px;
    height: 8px;
    background: #fff;
    box-shadow: 0 0 2px rgba(0,0,0,.5);
    overflow: hidden;
    line-height: 9999px;
    border-radius: 4px;
    transition: width .3s;
    margin: 0 5px;
    cursor: pointer;
}
.banner_hd li.on{
    background: #1AB5FF;
    width: 16px;
}
.banner .prev,.banner .next{
    width: 64px;
    height: 64px;
    position: absolute;
    z-index: 50;
    top: 50%;
    left: 50%;
    margin-top: -32px;
    opacity: 0;
    transition: all .3s;
}
.banner .prev{
    margin-left: -664px;
    background: url(../images/arrow-left.svg) no-repeat center center;
    background-size: cover;
    transform: translate(-100px,0);
}
.banner .next{
    margin-left: 632px;
    background: url(../images/arrow-right.svg) no-repeat center center;
    background-size: cover;
    transform: translate(100px,0);
}
.banner:hover .prev,.banner:hover .next{
    opacity: 1;
    transform: translate(0,0);
}
.index_dom1{
    width: 100%;
    height: 1941px;
    position: relative;
    background: url(../images/index_bj1.png) no-repeat center center;
    background-size: cover;
    z-index: 10;
}
.al_bj{
    background: url(../images/index_al_bj.svg) no-repeat center center;
    background-size: cover;
    width: 384px;
    height: 414px;
    padding: 46px 24px 0 24px;
    position: relative;
    overflow: hidden;
}