*{
    margin: 0;
    padding: 0;
}
.nav{
    position: fixed;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.5);
    width: 100%;
    height: 70px;
    font-size: 18px;
    z-index: 200;
}
.nav-menu{
    float: right;
}
.nav-nav{
    float: left;
}
.nav-nav li{
    float: left;
    width: 160px;
    height: 70px;
    line-height: 70px;
    text-align: center;
}
.nav-nav li a{
    display: inline-block;

}
.nav-nav li a div{
    width: 110px;
    height: 20px;
    overflow: hidden;
}
.nav-nav-item span{
    display: block;
    height: 24px;
    line-height: 24px;
}
.nav-nav-item span:first-child{
    color: #fff;
}
.nav-nav-item span:last-child{
    color: #3755D3;
    font-size: 20px;
    font-weight: 600;
}
.nav-nav-item{
    transition: all 0.5s ease;
    -moz-transition: all 0.5s ease; /* Firefox 4 */
    -webkit-transition: all 0.5s ease; /* Safari and Chrome */
    -o-transition: all 0.5s ease; /* Opera */
}
.nav-nav li:hover .nav-nav-item{
    margin-top: -24px;
}
.nav-nav li:nth-child(3) .nav-nav-item{
    margin-top: -24px;
}
.dropdown{
    display: none;
    background-color: rgba(0, 0, 0, 0.5);
    min-width: 180px;
}
.dropdown a{
    width: 180px;
    color: #fff;
    font-size: 16px;
}
.dropdown a:hover{
    background-color: rgba(255, 255, 255, 0.5);
    color: #3755D3;
    font-weight: 600;
}
.drop:hover .dropdown{
    display: block;
}
#DVB{
    position: absolute;
    width: 100%;
    height: 300vh;
}
.section{
    width: 100%;
}
.section1{
    height: 60vh;
}
/* .DVBBackground{
    position: absolute;
    width: 100%;
    height: 40vh;
    background:url(../img/product/DVB\ background.jpg) center top /cover;
}
.DVBBackground h1{
    font-size: 2.5vw;
    margin-top: 10vh;
    margin-left: 10%;
    color: rgba(55, 85, 211, 1);
} */
.DVB-list{
    position: absolute;
    width: 80%;
    /* height: 30vh; */
    background-color: #fff;
    /* margin-top: 25vh; */
    /* margin-left: 10%; */
    /* border-radius: 10px; */
    /* box-shadow: 10px 10px 5px -4px rgba(114, 113, 119, 0.3);  */
    /* justify-content: space-between; */
    /* display: flex; */
}
/* .DVBbox{
    width: 20%;
    height: 30vh;
    text-align: center;
    display: flex;
}
.DVBbox img {
    width: 100%;
    height: 15vh;
    margin-top: 3vh;
} */
.DVBbig{
    width: 100vw;
    height: 90vh;
    text-align: center;
    display: flex;
}
.DVBbig img {
    width: 100%;
}
/* .DVB-text{
    width: 20%;
    margin-top: 20vh;
}
.DVB-text h1{
    font-size: 1.2vw;
    color: rgb(55, 85, 211);
}
.DVB-text p{
    font-size: 0.2vw;
} */
.habndover{
    width: 4%;
    height: 1vh;
    position: absolute;
    /* top: 93vh; */
    top: 94vh;
    margin-left: 48%;
}
.habndover ul{
    justify-content: space-between;
    display: flex;
}
.habndover li{
    list-style: none;
    width: 12px;
    height: 12px;
    border: 1px solid rgb(55, 85, 211);
    border-radius: 8px;
    float: left;
}
.habndover li.point{
    background-color: rgb(55, 85, 211);
}
.section2{
    /* height: 300vh; */
    margin-top: 40vh;
    background:url(../img/product/background.jpg) center top /cover;
}
.DVBPart{
    width: 80%;
    margin-top: 15vh;
    margin-left: 10%;
}
.DVBPart1{
    height: 60vh;
}
.DVB-header{
    position:absolute;
    width: 25%;
    height: 5vh;
    background-color: rgba(55, 85, 211, 1);
    border-radius: 5px;
    z-index: 2;
    align-items: center;
    display: flex;
}
.DVB-header img{
    width: 12%;
}
.DVB-header h1{
    font-size: 1vw;
    margin-left: 10px;
    color: #fff;
}
.text{
    font-weight: 200;
}
.DVBPart2{
    height: 50vh;
}
.DVBPart3{
    height: 60vh;
}
.DVBPart4{
    height: 50vh;
}
.DVB-content{
    position:absolute;
    width: 74%;
    margin-top: 30px;
    margin-left: 3%;
    background-color: rgba(255, 255, 255,1);
    border-radius: 10px;
    box-shadow: 10px 10px 5px -4px rgba(114, 113, 119, 0.3);
    z-index: 1;
    align-items: center;
    display: flex;
    
}
.DVB-content1{
    height: 50vh;
}
.DVB-left{
    position:absolute;
    width: 60%;
}
.DVB-left a{
    display: block;
    margin-top: 1vh;
    margin-left: 10%;
    font-size: 1vw;
    color: #000;
}
.DVB-left a:hover{
    color: #3755D3;
}
.DVB-right{
    width: 30%;
    height: 25vh;
    margin-left: 60%;
    align-items: center;
    display: flex;
}
.DVB-right img{
    width: 100%;
    height: 25vh;
}
.DVB-content2{
    height: 40vh;
}
.DVB-content3{
    height: 50vh;
}
.DVB-content4{
    height: 40vh;
}