.waterfall .QHauthTree{-moz-column-count:4;column-count:4;-moz-column-gap:10px;column-gap:10px}.waterfall .QHauthTree>.authTree{background:#f9f9f9;margin-bottom:10px;padding:10px;border:1px solid #e5e5e5;-moz-column-break-inside:avoid;break-inside:avoid}