v2 能改头像吗,站里的那些大佬为啥能自定义 bg

如题，我试了，就算设置了 Gravatar 邮箱头像也没效果，还有自定义 css 代码只有自己能看见😭，是暂时关闭了吗

顺便贴下我的代码： @import url("//jkjoke.b0.upaiyun.com/css/v2ex.css"); body { background-color: #efefef; background-image: url( https://i.v2ex.co/6I8TG2g8.jpeg); background-repeat: no-repeat; background-attachment: fixed; background-position: center 0; background-size: cover; } #Wrapper{ background-color: transparent; animation-delay: 1s; -webkit-animation-delay: 1s; animation: fadein 2s; -webkit-animation: fadein 2s; } @-webkit-keyframes fadein { from { background-color: rgba(239, 239, 239, 255); } to { background-color: rgba(239, 239, 239, 0); } } @keyframes fadein { from { background-color: rgba(239, 239, 239, 255); } to { background-color: rgba(239, 239, 239, 0); } } #Main, #Top, #Rightbar { opacity: 0.95; }