Saber/public/cdn/element-ui/2.12.0/theme-chalk/option-group.css

.el-select-group{margin:0;padding:0}.el-select-group__wrap{position:relative;list-style:none;margin:0;padding:0}.el-select-group__wrap:not(:last-of-type){padding-bottom:24px}.el-select-group__wrap:not(:last-of-type)::after{content:'';position:absolute;display:block;left:20px;right:20px;bottom:12px;height:1px;background:#E4E7ED}.el-select-group__title{padding-left:20px;font-size:12px;color:#909399;line-height:30px}.el-select-group .el-select-dropdown__item{padding-left:20px}