#page_top{
  width: 90px;
  height: 90px;
  position: fixed;
  right: 0;
  bottom: 0;
  background: #ef3f98;
  opacity: 0.6;
  border-radius: 50%;
}


body{
    background: #000000;
}
.site-header{
    background: rgba(255,255,255,0.5);
    display: flex;
    padding: 20px 20px;
    position: fixed;
    justify-content: space-between;
    transition: .5s;
    width: 100%s;
}
.site-header.transform{
    background: rgba(255,255,255,0.9);
    padding: 20px;
}

.site-logo img{
    height: 90px;
    width: 400px;
}
.gnav__menu{
    display: flex;
}
.gnav__menu__item{
    margin-left: 40px;
}
.gnav__menu__item a{
    color: #333;
    text-decoration: none;
}
.hero{
    max-height: 40px;
    overflow: hidden;
}
.hero img{
    height: 100%;
    width: 100%;
}
.content{
    line-height: 1.6;
    margin: 0 auto;
    padding-top: 200px;
    width: 800px;
}
.content p{
    margin-bottom: 30px;
}
.site-footer{
    background: #000;
    padding: 20px 0;
}
.copyright{
    color: #fff;
    font-size: 12px;
    text-align: center;
}