*{
    margin: 0;
    pad: 0;
}
a{
    text-decoration:none
}
html,body{
    width: 100%;
    height: 100%;
}

header{
    width: 1150px;
    height: 10vh;
    margin: 0 auto;
}

header .logo{
    /* margin-left: 40px; */
    margin-top: 10px;
    height: 7vh;
}

header .login{
    cursor: pointer;
    float: right;
    margin-top: 3vh;
    width: 80px;
    height: 40px;
    background: url('../images/DL-1.png');
}
header .login a{
    width: 80px;
    height: 40px;
    display: block;
}
header .login:hover{
    background: url('../images/DL-2.png');
}

#content{
    width: 100%;
    min-width: 1300px;
    height: 980px;
    background: url('../images/BG2.png') no-repeat; 
    background-size: cover;
}

.opacity{
    position: absolute;
    width: 100%;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.2);
}

.content{
    width: 1182px;
    margin: 0 auto;
    position: relative;
}

.nav{
    width: 100%;
    display: flex;
}
.nav a{
    height: 50px;
    line-height: 50px;
    margin: 0 40px;
    color: white;
}
.nav a.active, .nav a:hover{
    color: #00ffff;
}

.center{
    width: 100%;
    margin-top: 60px;
    height:730px;
    position: relative;
    background: url('../images/lechengzhongxin.png') no-repeat;
    background-size: cover;
    overflow: hidden;
}

.center>a{
    /* position: absolute;
    display: block;
    width: 200px;
    height: 210px;
    cursor: pointer; */
}
.center ul{
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

.center ul li{
    width: 200px;
    height: 210px;
    margin:10px 45px;
}
.center ul li a{
    width: 200px;
    height: 210px;
    display: block;
}
.center ul li:nth-of-type(1){
    background: url('../images/dianzidianlu.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(1):hover{
    background: url('../images/dianzidianlu1.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(2){
    background: url('../images/qidongyeya.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(2):hover{
    width: 200px;
    height: 210px;
    background: url('../images/qidongyeya1.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(3){
    background: url('../images/dianqikongzhi.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(3):hover{
    background: url('../images/dianqikongzhi1.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(4){
    background: url('../images/gongyejiqiren.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(4):hover{
    background: url('../images/gongyejiqiren1.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(5){
    background: url('../images/dianqikongzhi.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(5):hover{
    background: url('../images/dianqikongzhi1.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(6){
    background: url('../images/gongyejiqirenyuanli.png') no-repeat;
    background-size: cover;
}
.center ul li:nth-of-type(6):hover{
    background: url('../images/gongyejiqirenyuanli1.png') no-repeat;
    background-size: cover;
}