编辑主题文件 style.css

/**
    *WordPress 圆形头像
*/
img.avatar.photo {
    border-radius: 100%;
    -moz-border-radius: 100%;
}

头像旋转

/**
    *WordPress 圆形头像
    *头像旋转
*/
img.avatar.photo {
    border-radius: 100%;
    -moz-border-radius: 100%;
    transition: .5s;
    -webkit-transition: .5s;
    -moz-transition: .5s;
    -o-transition: .5s;
}
 
img.avatar.photo:hover {
    transform: rotate(720deg);
    -webkit-transform: rotate(720deg);
    -moz-transform: rotate(720deg);
    -o-transform: rotate(720deg);
    -ms-transform: rotate(720deg);
}