.nav{font-size:16px;color:#666;margin:0 0 20px}.nav .nava{text-decoration:none;color:#666}.nav .navb{font-weight:700;color:#333}.nav .rt{margin:0 5px}@media screen and (max-width:660px){.nav{font-size:18px;margin:0}.channel{margin-left:13px;margin-bottom:20px}}