.site-logo {
position: relative;
width: 150px; height: 60px; color: #000;
}
.site-logo span {
float: left;
line-height: 63px;
padding: 5px;
}
.logo img {
max-height: 60px;
}
.logo {
position: absolute;
top: 0;
left: 0;
transition: opacity 0.5s ease;
opacity: 0;
display:none;
}
.mainlogo {
opacity: 1;
z-index: 2;
}
.rocalogo {
z-index: 1;
width: 380px;
}
.logo {
opacity: 0;
transition: opacity 0.5s ease;
}
.logo.show {
opacity: 1;
}