element-plus/theme-chalk/el-backtop.css

A Component Library for Vue 3

.el-backtop{--el-backtop-background-color:var(--el-color-white);--el-backtop-font-color:var(--el-color-primary);--el-backtop-hover-background-color:var(--el-border-color-extra-light);position:fixed;background-color:var(--el-backtop-background-color);width:40px;height:40px;border-radius:50%;color:var(--el-backtop-font-color);display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 0 6px rgba(0,0,0,.12);cursor:pointer;z-index:5}.el-backtop:hover{background-color:var(--el-backtop-hover-background-color)}