main.css

body {
    margin: 0;
    background-color: #3f3f3f;
}

ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

li:target {
    padding-top: 55px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    height: 55px;
    background-color: #303030;
}

.header .inner {
    max-width: 80%;
    box-sizing: border-box;
    margin: 0 auto;
    padding: 15px 5px;
    text-align: center;
}

.header a {
    display: inline-block;
    margin-right: 1.8em;
    vertical-align: middle;
    font-weight: 300;
    font-size: 15px;
    color: #eee;
    line-height: 24px;
    text-decoration: none;
}

a.logo {
    float: left;
    display: inline-block;
    vertical-align: middle;
    font-weight: bold;
    color: #1FF3FD;
}
/*content*/
.view {
    width: 90%;
    margin: 0 auto;
}

.content-view {
    padding-top: 55px;
}

.content-list {
    padding: 0 50px;
}

.classify .classify-title {
    padding: 10px 0;
    font-size: 18px;
    color: #fff;
    font-weight: bold;
    border-bottom: 1px solid #1FF3FD;
}

.level .level-title {
    margin: 5px 0 5px 10px;
    float: left;
    width: 100px;
    height: 36px;
    line-height: 36px;
    font-size: 16px;
    text-align: center;
    font-weight: bold;
    color: #1FF3FD;
    border-left: 5px solid #1FF3FD;
}

.level-item {
    overflow: hidden;
}

.level-item li {
    margin-right: 15px;
    float: left;
    font-size: 14px;
    height: 46px;
    line-height: 46px;
}

.level-item a {
    text-decoration: none;
    color: #eee;
    text-transform: capitalize;
}

.level-item a:hover {
    color: #1FF3FD;
}

/*footer*/
.footer {
    width: 100%;
    background-color: #303030;
}

.footer .inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.footer p {
    margin: 5px;
    font-size: 13px;
    text-align: center;
    color: #eee;
}