.header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5f5f5;
    height:50px;
    z-index: 1;
    box-shadow: 0px 2px 10px 2px rgba(200,200,200,0.6);
}
body,.header{
    min-width:800px;
}
.header p {
    color: #a0a0a0;
    font-size: 16px;
    margin: 0 15px;
}
.header a {
    margin: 0 15px;
}
.header a img{
    display: inline;
}
.content{
    padding-top:50px;
    position: relative;
}
.content .tags{
    position: absolute;
    right:15px;
    top:70px;
}
.content .tags ul{
    display: flex;
    justify-content: center;
    align-items: center;
}
.content .tags ul li{
    margin-left:50px;
    position: relative;
}
.content .tags ul li.active::after{
    content: "";
    display: block;
    position: absolute;
    bottom:-10px;
    left:50%;
    transform: translateX(-50%);
    width:20px;
    height:4px;
    border-radius:2px;
    background-color: #fff;
}
.content .tags ul li a{
    color:rgba(255, 255, 255, 0.8);
    font-size: 15px;
}
.content .tags ul li.active a{
    color:rgba(255, 255, 255,1);
}
.footer{
    background-color: #383838;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding:10px 20px;
}
.footer img{
    width:auto;
}
.footer a{
    font-size: 14px;
    color:rgba(255, 255, 255, 0.8);
    margin: 0 10px;
}