.topup-notice-tb {
      position: fixed;
      left: 0;
      right: 0;
      top: 0;
      transform: translateY(-120%);
      background: linear-gradient(90deg, rgba(11, 18, 32, 0.98), rgba(18, 24, 40, 0.98));
      color: rgba(255, 255, 255, 0.8);
      box-shadow: 0 6px 30px rgba(2, 6, 23, 0.6);
      z-index: 99999;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 18px;
      gap: 12px;
      transition: transform 0.45s cubic-bezier(.2, .9, .3, 1);
    }

    .topup-notice-tb.show-tb {
      transform: translateY(0);
    }

    .topup-inner-tb {
      max-width: 1100px;
      margin: 0 auto;
      display: flex;
      gap: 16px;
      align-items: center;
      width: 100%;
    }

    .icon-tb {
      flex: 0 0 48px;
      height: 48px;
      border-radius: 8px;
      background: var(--accent);
      display: grid;
      place-items: center;
      color: #111;
      font-weight: 700;
    }

    .content-tb {
      flex: 1;
    }

    .content-tb h3 {
      margin: 0 0 6px;
      font-size: 16px;
    }

    .content-tb p {
      margin: 0 0 10px;
      line-height: 1.35;
      opacity: 0.95;
    }

    .links-tb {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .links-tb a {
      background: rgba(255, 255, 255, 0.06);
      padding: 8px 10px;
      border-radius: 8px;
      text-decoration: none;
      color: rgba(255, 255, 255, 0.8);
      font-weight: 600;
      font-size: 14px;
    }

    .actions-tb {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 8px;
    }

    .btn-close-tb {
      background: transparent;
      border: 0;
      color: rgba(255, 255, 255, 0.8);
      font-size: 18px;
      cursor: pointer;
    }

    .small-opts-tb {
      display: flex;
      gap: 8px;
      align-items: center;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.9);
    }

    .small-opts-tb input {
      transform: scale(1.1);
      margin-right: 6px;
    }

    /* --- Responsive cho điện thoại (hiển thị dưới cùng) --- */
    @media (max-width: 720px) {
      .topup-notice-tb {
        top: auto;
        bottom: 0;
        transform: translateY(120%);
        background: linear-gradient(180deg, rgba(11, 18, 32, 0.98), rgba(18, 24, 40, 0.98));
        box-shadow: 0 -4px 30px rgba(2, 6, 23, 0.6);
        border-top-left-radius: 16px;
        border-top-right-radius: 16px;
        padding: 14px 10px;
      }

      .topup-notice-tb.show-tb {
        transform: translateY(0);
      }

      .topup-inner-tb {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        text-align: center;
      }

      .content-tb h3 {
        font-size: 15px;
      }

      .content-tb p {
        font-size: 13px;
      }

      .links-tb {
        justify-content: center;
      }

      .links-tb a {
        flex: 1 1 45%;
        text-align: center;
        font-size: 13px;
        min-width: 120px;
      }

      .actions-tb {
        align-items: center;
        margin-top: 8px;
      }

      .btn-close-tb {
        background: rgba(255, 255, 255, 0.1);
        padding: 6px 14px;
        border-radius: 8px;
      }
    }