.box_cmt_before {
    display: flex;
    position: relative;
}

.new-com-bt {
    margin-left: 20px;
    height: 40px;
}

.box_cmt_before .cmt-avatar {
    width: 40px;
    overflow: hidden;
    border-radius: 50%;
}
.cmt-avatar img {
    width: 100%;
    height: auto;
}

.send-cmt.post_comment {
    position: absolute;
    top: 0;
    background: #E40C14;
    right: 0px;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0px 15px;
    font-size: 18px;
    color: #fff;
}