saas-one/frontend/saas-web/app-make/app/view/sys/parameter/SettingNav.scss

.sys-parameter-nav{
    .x-nav-box{
        ul{
            .x-nav-item{
                position: relative;
                height:55px;
                line-height:55px;
                text-align: center;
                font-size: 16px;
                letter-spacing: 1px;
                font-weight: 400;
                font-family: 'Microsoft YaHei';
                cursor: pointer;
            }
            .x-nav-item-selected{
                background:#e5f7ff;
                &:before {
                    content: ' ';
                    position: absolute;
                    width: 6px;
                    height: 55px;
                    background: #6666ff;
                    left: 0;
                }
            }
        }
    }
}