:root{--el-transition-duration:0.3s;--el-transition-duration-fast:0.2s;--el-ease-in-out-bezier-function:cubic-bezier(0.645, 0.045, 0.355, 1);--el-fast-bezier-transition:cubic-bezier(0.23, 1, 0.32, 1);--el-all-transition:all var(--el-transition-duration) var(--el-ease-in-out-bezier-function);--el-fade-transition:opacity var(--el-transition-duration) var(--el-fast-bezier-transition);--el-md-fade-transition:transform var(--el-transition-duration) var(--el-fast-bezier-transition),opacity var(--el-transition-duration) var(--el-fast-bezier-transition);--el-fade-linear-transition:opacity var(--el-transition-duration-fast) linear;--el-border-transition-base:border-color var(--el-transition-duration-fast) var(--el-ease-in-out-bezier-function);--el-color-transition-base:color var(--el-transition-duration-fast) var(--el-ease-in-out-bezier-function)}.el-backtop{position:fixed;background-color:#fff;width:40px;height:40px;border-radius:50%;color:#409eff;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;font-size:20px;-webkit-box-shadow:0 0 6px rgba(0,0,0,.12);box-shadow:0 0 6px rgba(0,0,0,.12);cursor:pointer;z-index:5}.el-backtop:hover{background-color:#f2f6fc}