@media (max-width: 767px) {
    .pc{display: none}
}
@media (min-width: 768px) {
    .sp{display: none}
}


.drift_d_mv{
    position: relative;
    width: 100%;
    margin: 0 auto;
    z-index: 2;
    margin-bottom: -100px;
}
@media (max-width: 767px) {
    .drift_d_mv{
        margin-top: 40px;
    }
}

.drift_d-main {
    background-image: url("../img/drift_d_bg.jpg");
    background-size: cover;
    padding-bottom: 5em; 
}
@media (max-width: 767px) {
    .drift_d-main {
        padding-bottom: 1em;
    }
}

  /* ABOUT */
.drift_d_about-area{
    position: relative;
    z-index: 1;
    width: 100%;
    background-image: url("../img/drift_d_about_bg.jpg");
    background-size: cover;
    padding: 10em 0;
}
@media (max-width: 767px) {
    .drift_d_about-area{
        padding: 7em 0 3em;
    }
}
.drift_d_about-chach{
    width: 59.114583333333336vw;
    margin: 0 auto 1em;
}
@media (max-width: 767px) {
    .drift_d_about-chach{
        width: 90vw;
        margin: 0 auto 0.3em;
    }
}

  /* MOVIE */
.drift_player {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
    background-color: #cccccc;
    border: 1px solid #cccccc;
    padding: 5px;
}

.drift_player iframe {
    width: 100%;
    height: 562.5px; /* 16:9比率 (1000px × 9 ÷ 16) */
    max-width: 1000px;
}

@media (max-width: 767px) {
    .drift_player {
        width: 90%;
    }
    .drift_player iframe {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 9;
    }
}

  /* HOW TO PLAY */
.drift_d_howto{
    width: 67.70833333333334vw;
    max-width: 1300px;
    margin: 0 auto;
    padding: 3em 0;
    border: 8px solid #fff;
    border-radius: 10px;
    background-image: url("../img/drift_d_howto_bg.jpg");
    background-size: cover;
}
@media (max-width: 767px) {
    .drift_d_howto{
        width:90%;
        padding: 1em 0 0.5em;
        border: 3px solid #fff;
        background-size: contain;
        background-repeat: repeat-y;
    }
}

.drift_d_howto-chach{
    width: 34.53125vw;
    max-width: 663px;
    margin: 0 auto;
}
@media (max-width: 767px) {
    .drift_d_howto-chach{
        width: 70%;
    }
}

.drift_d_howto-image{
    margin-bottom: 2em;
}
@media (max-width: 767px) {
    .drift_d_howto-image{
    margin-bottom: 1em;
}
}

.drift_d_line{
    width: 90%;
    margin: 0 auto;
    border-bottom: 1px solid #fff;
    margin-bottom: 4em;
}
@media (max-width: 767px) {
    .drift_d_line{
    margin-bottom: 1em;
}
}

.accordion {
  width: 100%;
}

.accordion-checkbox {
  display: none;
}

.drift_d_detail-title {
  width: 85%;
  display: block;
  margin: 0 auto 3em;
  cursor: pointer;
}
@media (max-width: 767px) {
    .drift_d_detail-title {
  margin: 0 auto 1em;
}
}

.drift_d_howto_detail_flex img{
    width: 100%;
}

.drift_d_howto_detail_flex {
  width: 90%;
  margin: 0 auto;
  list-style: none;
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  max-height: 0; /* 初期状態で非表示 */
  overflow: hidden; /* 非表示部分を隠す */
  transition: max-height 0.3s ease;
}
@media (max-width: 767px) {
    .drift_d_howto_detail_flex {
        flex-direction: column;
        justify-content: flex-start;
    }
    .drift_d_howto_detail_item{
        width: 75%;
        margin: 0.5em auto;
    }
}

.accordion-checkbox:checked ~ .drift_d_howto_detail_flex {
  max-height: 600px; /* コンテンツの高さに応じて調整 */
}
@media (max-width: 767px) {
    .accordion-checkbox:checked ~ .drift_d_howto_detail_flex {
  max-height: 1500px; /* コンテンツの高さに応じて調整 */
}
}

  /* IMAGE */
.drift_d_image{
}

  /* 購入ボタン */
.drift_d_mall-area {
  width: 1000px;
  margin: 0 auto 5em;
  position: relative;
}
@media (max-width: 767px) {
    .drift_d_mall-area {
  width: 90%;
  margin: 0 auto 1em;
}
}

.background-image {
  width: 100%;
  height: auto;
  display: block;
}

.btn-container {
  position: absolute;
  bottom: 0%;
  left: 50%;
  transform: translate(-50%, -50%); /* 完全に中央揃え */
  display: flex;
  gap: 10px; /* ボタン間の余白 */
}
@media (max-width: 767px) {
    .btn-container {
        bottom: -5%;
    }
}

.btn-light {
    font-size: 30px;
  display: block;
  background-image: url("../img/drift_d_konyu-btn.png");
  background-color: transparent;
  border: 0;
  color: #fff;
  font-weight: bold;
  width: 350px;
  height: 75px;
  background-size: cover;
  background-position: center;
  text-align: center;
  line-height: 70px;
}
@media (max-width: 767px) {
    .btn-light {
        font-size: 20px;
        width: 250px;
        height: 53px;
        line-height: 50px;
    }
}

.btn-light:hover {
  opacity: 0.8; /* ホバー時のエフェクト */
    color: #fff;
}



/*コピーライト*/
.drift_d_copyright{
    max-width: 200px;
    margin: 0 auto;
    width: 100%;
}
@media (max-width: 767px) {
    .drift_d_copyright{
    max-width: 100px;
}
}