*{
    margin: 0;
    padding: 0;
}
header{
    width: 100%;
    height: 180px;
    margin-top: 50px;
    background-image: url(../images/header-bgi.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}
div#user{
    width: 350px;
    position: relative;
    top: 8%;
    left: 10%;
}
div#head{
    width: 150px;
    height: 150px;
    float: left;
    margin-right: 20px;
    background-image: url(../images/head.jpg);
    background-repeat: no-repeat;
    background-size: contain;
}
div#name{
    height: 150px;
    margin-left: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    overflow: hidden;
}
div#name > h2{
    color: burlywood;
    font-size: 38px;
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
}
div#name > p{
    height: 60px;
    font-size: 16px;
    font-family: "楷体";
}
nav{
    width: 100%;
    height: 50px;
    font-size: 20px;
    color: darkgray;
    background-color: #000;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
}
ul{
    text-align: center;
    list-style: none;
}
a,a:visited{
    text-decoration: none;
    color: darkgray;
}
ul#first{
    width: 40%;
    margin: 0 auto;
    padding-top:5px;
    display: flex;
    justify-content: space-around;
}
ul#first > li{
    padding: 5px;
    float: left;
}
ul#first ul{
    padding: 20px 10px 10px 10px;
    font-size: 16px;
    background-color: #000;
    display: none;
}
ul#first ul > li:nth-last-of-type(1){
    padding-top: 10px;
}
ul#first > li:hover > ul,ul#first ul:hover{
    display: block;
}

@media screen and (min-width: 679px) and (max-width: 860px){
    ul#first{
        width: 60%;
    }
}
@media screen and (max-width: 680px){
    ul#first{
        width: 70%;
    }
}
footer{
    width: 100%;
    height: 120px;
    padding-top: 1%;
    padding-right:2%; 
    font-family: 'Courier New', Courier, monospace;
    text-align: right;
    background-color: rgb(200,200,200);
    box-sizing: border-box;
    position: relative;
    bottom: 0;
}
footer > h3{
    font-family: "仿宋";
}
footer > div > h6{
    display: inline;
}