@media (max-width: 960px) {
  .background-container img {
    /*배경*/
    width: 140vw;
  }
    .content-title span {
    text-align: center;
    margin: 0 auto;
  }
  .content-title button {
    display: none;
  }
  .responsive-btn-wrapper {
    display: flex;
    justify-content: center; /* 수평 정렬 */
    align-items: center;     /* 수직 정렬 */
  }
}

@media (max-width: 600px) {
  .background-container img {
    /*배경*/
    height: 220vh;
  }
}

@media (max-width: 470px) {
  .background-container img {
    /*배경*/
    height: 250vh;
  }
}

@media (max-width: 420px) {
  .background-container img {
    /*배경*/
    height: 270vh;
  }
}

@media (max-width: 380px) {
  .background-container img {
    /*배경*/
    height: 280vh;
  }
}

@media (max-width: 350px) {
  .background-container img {
    /*배경*/
    height: 290vh;
  }
}