* {
	margin: 0;
	padding: 0;
}
a {
    text-decoration: none;
}
.header-content {
	position: relative;
}
.nav {
    position: absolute;
    width: 100%;
    height: 59px;
    background-color: rgba(0,0,0,.3);
}
.nav a {
    color: white;
    font-size: 21px;
    height: 59px;
    line-height: 59px;
    padding: 18px;
    margin-right: 91px;
}
.nav a.current {
	background-color: blue;
}
.link-container {
	width: 75%;
	margin: 0 auto;
}
a.index-page {
    margin-left: 123px;
}
.common-title-a {
	width: 100%;
    display: inline-block;
}
.bottom{
    position: absolute;
    position: center;
    left: 40%;
    margin-top: -25px;

}