header{
    width: 100%;
}
.header-box{
    width: 1200px;
    height:80px;
    margin:0 auto;
    display:flex;
    justify-content: space-between;
    align-items: center;
}
.logo{
    width: 300px;
    height:80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-decoration: none;
}
.logo:hover{
    text-decoration: none;
}
.logo p{
    font-family: '黑体';
    font-size: 30px;
    color:#333;
    line-height:80px;
    height:80px;
    font-size:900;
}
.nav{
    width: 800px;
    height:80px;
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.nav a{
    text-decoration: none;
    color:#000;
    font-size:20px;
    font-weight:900;
}
.nav a:hover{
    color:red;
}