body{
    max-width: 1920px;
    max-height: 1500px;
    margin: 0 auto;
    position: relative;
    background: url(../../imger/bg1.png) no-repeat center top;
}
body>div{
  width: 100%;
  overflow: hidden;
  min-width: 1000px;
}
.header{
    transition: background-color 0.3s;
    background:rgba(255,255,255,1);
    width: 1200px;
    margin:0px auto;
    height:76px;
    padding:0px 360px;
    animation: headerbox 1s both ease-in-out;
    position: relative;
}
.logo{
    width:350px;
}
.logobox{
    float:left;
}
.headernav{
    display:flex;
    float:right;
}
.headernav01{
    margin: 0 20px;
    text-align:center;
    line-height: 76px;
    position: relative;
}
.headernav01:hover:before {
    display: inline-block;
    content: "";
    height: 2px;
    width: 100%;
    background: rgb(89,148,242);
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
.headernav01:hover a{
    color: rgb(89,148,242);
}
.headernav01:first-child a{
    color: rgb(89,148,242);
}
.header ul li:last-child:hover ul{
    height: 500px;
    padding-top: 10px;
}
.headernav>li:last-child:hover>a:after{
    transform:rotate(180deg);
    border-top:5px solid rgb(89,148,242);
}
.headernav>li:last-child>a:after{
    float: right;
    margin-top: 35px;
    margin-left: 5px;
    content: "";
    width:0px;
    height:0px;
    border-top:5px solid rgb(0,0,0);
    border-right:5px solid transparent;
    border-left:5px solid transparent;
}
.header ul li:last-child ul{
    transition:all 0.3s;
    overflow: hidden;
    height: 0px;
    background:rgba(255,255,255,1);
    width:110%;
    z-index: 99;
    position: absolute;
    box-shadow: 0 1px 15px 0 rgba(0,0,0,5%);
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
}
.header ul li:last-child ul li{
    width:100%;
    line-height: 60px;
    text-align:left;
    padding-left:20px;
}
.header ul li:last-child ul li a{
    display:block;
    width:100%;
    color:#000;
    transition:padding 0.3s;
}
.header ul li:last-child ul li:hover{
    background: rgb(89,148,242);
}
.header ul li:last-child ul li:hover a{
    color:#fff;
    padding-left:5px;
}
.header ul li:last-child ul li:hover a:after{
    content: "";
    float: left;
    width: 7px;
    height: 20px;
    margin-top: 20px;
    margin-right: 5px;
    background: #fff;
}
.header ul li:last-child ul li a:after{
    content: "";
    float: left;
    width: 0px;
    height: 20px;
    margin-top: 20px;
    margin-right: 5px;
    background: #fff;
    transition:all 0.3s;
}
.header ul li a{
    display: block;
    font-size: 15px;
    color: #000;
    transition:all 0.3s;
}