修改源码

1. (文章内页)在PIX文件-tpl文件-single-moment.php
第25行<div class="avatar"><?php echo  get_user_avatar(); ?>后添加<span class="avatar-badge badge_5 w-12"></span>
2. （片刻首页）在PIX文件-inc文件-pix-comment.php
第102行<a href="<?php echo $url ?>" target="_blank"><?php echo pix_comment_ava($user_id,$comment) ?>后添加<span class="avatar-badge badge_5 w-12"></span>
3. （评论）在PIX文件-tpl文件-content-moment.php
第39行<div class="avatar"><?php echo  get_user_avatar(); ?>后添加<span class="avatar-badge badge_5 w-12"></span>

主题后台自定义css

.list_user_meta .avatar img {
    border-radius: 50px;
}
.comments-area ul.comment-list li .profile a img {
    border-radius: 50px;
}
.avatar .avatar-badge.badge_5 {
    background-image: url(data:image/svg+xml;base64,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);
}
.list_user_meta .avatar {
    position: relative;
}
.avatar .avatar-badge.w-12 {
    width: 14px;
    height: 14px;
    right: 0px;
    bottom: 0px;
}
.avatar .avatar-badge {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 15px;
    height: 15px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    transform: translate(0%, 0%);
}
.profile .avatar-badge.badge_5 {
    background-image: url(data:image/svg+xml;base64,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);
}
.profile {
    position: relative;
}
.profile .avatar-badge.w-12 {
    width: 12px;
    height: 12px;
    right: 0px;
    bottom: 0px;
}
.profile .avatar-badge {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 15px;
    height: 15px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    transform: translate(0%, 0%);
}

原文地址