/*Content CSS*/
#header_wrap { width:100%; height:60px; background-color:transparent; z-index:57; position:fixed; transition: all 0.3s;border-bottom: 1px solid rgba(255,255,255,.2);}
#logo {height: 100%; display: flex; align-items: center; justify-content: center;}
#logo a {display: block; margin: 0 auto;font-size: 0; width: 140px; height: 35px; background: url('../img/logo.png') 50% / cover no-repeat; transition: .3s; line-height: 60px;}

.scrolled #header_wrap{background-color: #fff; border-bottom-color: #ddd;}
.scrolled #logo a{background-image: url('../img/logo_hv.png')}