@media screen and (min-width: 1240px) and (max-width: 1360px) {
  /* container */
  .container {
    padding: 0 20px;
  }

  /* intro */
  .introSub4 {
    font-size: 24px;
  }

  /* market */
  .marketTitle {
    font-size: 30px;
  }
}

@media screen and (max-width: 1024px) {
  /* container */
  .container {
    padding: 0 20px;
  }

  /* intro */
  .introInner {
    padding: 0;
  }
  .introSub3 {
    font-size: 30px;
  }
  .introSub4 {
    font-size: 22px;
  }

  /* items */
  .itemsTitle {
    font-size: 55px;
  }
  .itemsBlocks {
    padding: 0;
  }

  /* use */
  .useInner {
    padding: 0;
  }

  /* market */
  .marketTop {
    padding: 0;
  }
  .marketTitle {
    font-size: 27px;
  }

  /* what */
  .whatInner {
    padding: 0;
  }

  /* about */
  .aboutInner {
    padding: 0;
  }
}

@media screen and (max-width: 991px) {
  /* container */
  .container {
    max-width: 750px;
    margin: 0 auto;
  }

  /* intro */
  .intro {
    padding-top: 50px;
  }
  .introTop {
    flex-direction: column;
    row-gap: 30px;
  }
  .introText {
    width: 100%;
  }
  .introVideo {
    width: 100%;
    height: 400px;
  }
  .introSub5 br {
    display: none;
  }
  .introSub5 {
    text-align: center;
  }

  /* items */
  .items {
    padding-top: 50px;
  }
  .itemsTitle {
    font-size: 40px;
    line-height: 55px;
  }
  .itemsBlocks {
    flex-direction: column;
    row-gap: 30px;
  }
  .itemBlock {
    width: 100%;
  }

  /* use */
  .use {
    margin-top: 50px;
  }
  .useInner {
    flex-direction: column;
    row-gap: 30px;
  }
  .useList {
    width: 100%;
  }
  .useImg {
    width: 100%;
  }

  /* who */
  .who {
    margin-top: 50px;
  }
  .whoTitle {
    font-size: 50px;
    line-height: 60px;
  }

  /* market */
  .marketTop {
    flex-direction: column;
    row-gap: 30px;
    align-items: center;
  }
  .marketBtn {
    padding: 15px 30px;
  }
  .fullSpan {
    width: auto;
    display: inline-block;
  }
  .marketBottomTitle {
    font-size: 40px;
    line-height: 50px;
  }
  .marketBottomSub {
    font-size: 18px;
  }

  /* what */
  .what {
    padding-bottom: 50px;
  }
  .whatTitle {
    font-size: 45px;
    line-height: 55px;
  }
  .whatBlock {
    width: 100%;
  }
  .whatBlock img {
    margin: 0 auto;
  }

  /* about */
  .about {
    padding: 50px 0;
  }
  .aboutInner {
    flex-direction: column;
    row-gap: 30px;
  }
  .aboutImg {
    width: 100%;
  }
  .aboutText {
    width: 100%;
  }

  /* unlock */
  .unlock {
    padding-top: 50px;
  }
}

@media screen and (max-width: 767px) {
  /* container */
  .container {
    max-width: 750px;
    margin: 0 auto;
  }

  /* intro */
  .intro {
    padding-top: 30px;
  }
  .introSub {
    font-size: 28px;
  }
  .introTitle {
    font-size: 70px;
  }
  .introSub1 {
    font-size: 30px;
    line-height: 40px;
  }
  .introSub2 {
    font-size: 25px;
  }
  .introSub3 {
    font-size: 20px;
  }
  .introSub4 {
    font-size: 16px;
  }
  .introVideo {
    height: 200px;
  }
  .introSub5 {
    font-size: 17px;
    padding-top: 30px;
    padding-bottom: 30px;
  }
  .introBtn {
    font-size: 20px;
  }
  .introSub6 {
    font-size: 25px;
  }

  /* items */
  .items {
    padding-top: 30px;
  }
  .itemsTitle {
    font-size: 25px;
    line-height: 35px;
  }

  /* use */
  .use {
    margin-top: 30px;
  }

  /* who */
  .who {
    margin-top: 30px;
    padding: 30px 0;
  }
  .whoInner {
    padding: 0;
  }
  .whoTitle {
    font-size: 26px;
    line-height: 36px;
  }

  /* market */
  .market {
    padding-top: 30px;
  }
  .marketTitle {
    font-size: 17px;
    text-align: center;
  }
  .marketBtn {
    padding: 15px 10px;
    font-size: 22px;
    gap: 10px;
  }
  .marketBottomTitle {
    font-size: 25px;
    line-height: 35px;
  }
  .marketBottomSub {
    font-size: 15px;
  }

  /* what */
  .what {
    padding-bottom: 30px;
    border-width: 30px;
  }
  .whatTitle {
    font-size: 30px;
    line-height: 45px;
  }

  /* about */
  .about {
    padding: 30px 0;
  }
  .aboutTitle {
    font-size: 30px;
    line-height: 40px;
  }

  /* unlock */
  .unlock {
    padding: 30px 0;
  }
  .unlockBtn {
    font-size: 18px;
    line-height: 35px;
    padding: 12px;
  }

  /* footer */
  .footer {
    padding: 30px 0;
  }
  .footerSub {
    font-size: 14px;
  }
}