body {
  color: #fff;
  background: #000;
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", Meiryo, sans-serif;
  line-height: 1.6;
}
.section-in {
  width: 90%;
  margin: 0 auto;
}
.section-in {
  padding: clamp(50px, calc(50 / 375 * 100vw), 100px) 0;
}
.contact-tit {
  font-weight: normal;
  text-align: center;
  margin-bottom: clamp(10px, calc(10 / 375 * 100vw), 30px);
  font-size: clamp(20px, calc(20 / 375 * 100vw), 28px);
}
#header {
  position: fixed;
  width: 90%;
  left: 5%;
  right: 0;
  top: 1%;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}
.header-tit {
  font-size: clamp(20px, calc(20 / 375 * 100vw), 28px);
  font-weight: bold;
}
.collection-tit-box {
  width: 90%;
  margin: 0 auto;
}
.header-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: clamp(5px, calc(5 / 375 * 100vw), 20px);
}
.header-list a {
  display: block;
  font-size: clamp(10px, calc(10 / 375 * 100vw), 18px);
  padding: 10px 5px;
  border: 1px solid transparent;
}
.header-list a:hover {
  background: #fff;
  color: #000;
}
.header-contact a {
  border: 1px solid #fff;
}

.collection-tit {
  font-size: clamp(18px, calc(18 / 375 * 100vw), 24px);
}
.collection-txt {
  font-size: clamp(14px, calc(14 / 375 * 100vw), 18px);
}
.video-background {
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1; /* ビデオを背面に表示 */
}

#bgvid {
  width: 100vw;
  height: 100vh;
  object-fit: contain; /* 画面全体にビデオをフィットさせる */
}
.collection-list img {
  width: 100%;
  height: auto;
}
.collection-list {
  width: 90%;
  margin: 0 auto;
  padding: 0;
}
.collection-list li:nth-child(even) img {
  filter: grayscale(100%);
}
.collection-list li:nth-child(even) {
  position: sticky;
  left: 0;
  top: 0;
  z-index: -1;
}
.collection-list li img {
  object-fit: cover;
  object-position: 50% 50%;
}
.collection-list li {
  margin-top: clamp(30px, calc(30 / 375 * 100vw), 50px);
  height: 100vw;
  overflow: hidden;
  list-style-type: none;
}
.collection-list li:first-child {
  margin-top: 0;
}

.contact-table {
  width: 100%;
}
.contact-table tr {
  display: block;
}
.contact-table th {
  font-weight: normal;
  margin-bottom: clamp(10px, calc(10 / 375 * 100vw), 20px);
  padding-bottom: calc(5 / 375 * 100vw);
  border-bottom: 1px solid #666;
  text-align: left;
  display: block;
  width: 100%;
  font-size: clamp(12px, calc(12 / 375 * 100vw), 18px);
}
.contact-table td {
  display: block;
  width: 100%;
  font-size: calc(14 / 375 * 100vw);
  margin-bottom: clamp(20px, calc(20 / 375 * 100vw), 30px);
}
.cmn-input {
  display: block;
  width: 100%;
  padding: calc(5 / 375 * 100vw);
  border: 1px solid #fff;
  font-size: calc(18 / 375 * 100vw);
  box-sizing: border-box;
}
.cmn-input-textarea {
  width: 100%;
  height: 300px;
  border: 1px solid #fff;
}
.cmn-submit {
  width: 60%;
  margin: 0 auto;
  color: #000;
  background: #fff;
}
.cmn-input-submit {
  width: 100%;
  border: 0;
  text-align: center;
  padding: calc(10 / 375 * 100vw);
  color: #000;
  background: #fff;
}
.brand-in {
  position: relative;
  margin-top: clamp(50px, calc(50 / 375 * 100vw), 100px);
}
.brand-in::before {
  content: "";
  position: absolute;
  top: 5%;
  left: 5%;
  width: 90%;
  height: 90%;
  border: 1px solid #fff;
  z-index: -1;
}
.brand-tit {
  padding: 20px 0;
  font-size: clamp(12px, calc(12 / 375 * 100vw), 18px);
  background: #000;
}
.brand-one {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 20px;
}
.brand-one img {
  width: min(300px, 30%);
}
.brand-name {
  font-size: clamp(14px, calc(14 / 375 * 100vw), 22px);
}
.brand-name-sub {
  display: block;
  font-size: 80%;
}
@media (min-width: 980px) {
  .header-contact {
    font-size: 12px;
  }
  .collection-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  .collection-list li:nth-child(odd) {
    width: 64%;
  }
  .collection-list li:nth-child(even) {
    width: 32%;
    top: 5vw;
  }
  .section-in {
    width: 600px;
    margin: 0 auto;
  }
  .cmn-input {
    font-size: 22px;
    padding: 5px;
  }
  .cmn-input-textarea {
    font-size: 22px;
    padding: 5px;
  }
  .contact-table th {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #666;
    font-size: 16px;
  }
  .cmn-input {
    margin-top: 0;
  }
  .cmn-input-submit {
    padding: 10px 5px;
    font-size: 24px;
  }
  .header-list a {
    font-size: 14px;
    padding: 5px 10px;
  }
  .collection-tit-box {
    width: 90%;
    padding: 2vw 0;
  }
}