._bnr.modal-slideup {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    z-index: 9999; /* 必要に応じて調整 */
    background: rgba(0,0,0,.3); /* 背景色はお好みで */
    box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
    margin: 0;
    padding: 0;
  }
  
  .modal-slide_inner {
    max-width: 500px; /* お好みで */
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
  }
  
  .modal_slideup_contents img {
    max-height: 60px; /* お好みで */
    height: auto;
    display: block;
  }
  
  .modal-close-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-left: 16px;
    display: flex;
    align-items: center;
  }