*{
    box-sizing: border-box;
}
html{
    position: absolute;
    width: 100%;
    height: 100%;
    font-size: 62.5%;
}
html,body{
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}
img{
    display: block;
}
header{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding-top: 3.0rem;
    z-index: 9;
}
.main{
    width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
nav{
    display: flex;
    align-items: center;
}
nav a{
    text-decoration: none;
    font-size: 1.8rem;
    color: #ffffff;
    margin-left: 5.6rem;
    border-bottom: 2px solid rgba(0,0,0,0);
    padding-bottom: 10px;
}
nav a.active{
    border-bottom:2px solid #ffffff ;
}
.content .imgBox{
    width: 1200px;
    position: relative;
    margin: 0 auto;
    display: flex;
    justify-content: center;
}
.content .imgBox img{
    
}

footer{
    background-color: #555555;
    height: 40px;
    line-height: 40px;
}
footer p{
    text-align: center;
    margin: 0;
    font-size: 14px;
    color: #aaa;
}
footer p a{
    color: #999;
    text-decoration: none;
}