.back-to-top{width:100%;display:inline-block;vertical-align:middle;padding:10.5px 0}.back-to-top .back-wrap{width:100%}.back-to-top .back-wrap a{width:100%;height:3.5rem;display:flex;justify-content:center;align-items:center;font-size:18px;line-height:31px;font-weight:600;color:#2d3e50;background-color:#f5f8fa;cursor:pointer}.back-to-top .back-wrap a i{font-size:26px;line-height:31px;font-weight:600;color:#2d3e50;margin-right:8px}