Custom Style - https://news.hada.io/

custom.css

.comment_row {
  border-collapse: collapse;
}

.comment_row>tbody>tr>td {
  padding-left: 3px;
}

.comment_row>tbody>tr>td:first-child:not([width]) {
  background: linear-gradient(90deg,
      #E5E5E5, #E5E5E5 1px,
      rgba(0, 0, 0, 0) 1px, rgba(0, 0, 0, 0) 12px);
  border-top: 12px solid #FBFBFB;
}

.comment_row>tbody>tr>td[width]:first-child {
  background: repeating-linear-gradient(90deg,
      #E5E5E5, #E5E5E5 1px,
      rgba(0, 0, 0, 0) 1px, rgba(0, 0, 0, 0) 12px);
}

@media (prefers-color-scheme: dark) {

  .comment_row>tbody>tr>td:first-child:not([width]) {
    background: linear-gradient(90deg,
        #383B40, #383B40 1px,
        rgba(0, 0, 0, 0) 1px, rgba(0, 0, 0, 0) 12px);
    border-top-color: #1F2023;
  }

  .comment_row>tbody>tr>td[width]:first-child {
    background: repeating-linear-gradient(90deg,
        #383B40, #383B40 1px,
        rgba(0, 0, 0, 0) 1px, rgba(0, 0, 0, 0) 12px);
  }

}