html, body { margin: 0; background: #000; }
img, video { max-width: 100%; height: auto; }
@font-face {
  font-family: Pulse;
  src: url("font/Pulse-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Pulse;
  src: url("font/Pulse-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Pulse;
  src: url("font/Pulse-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: Pulse;
  src: url("font/Pulse-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

.bt,
.bt * {
  box-sizing: border-box;
}

.bt {
  min-height: 100vh;
  background: #000;
  color: #f4f5f7;
  overflow-x: clip;
  font-family: Pulse, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
}

.bt :where(h1, h2, p, button) {
  margin: 0;
  font-family: inherit;
}

.bt a {
  color: inherit;
  text-decoration: none;
}

.bt a.bt-register {
  color: #151517;
}

.bt-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  background: #070808;
}

.bt-logo {
  display: block;
  width: 103px;
  height: 32px;
  color: #fff;
  flex: none;
}

.bt-logo svg {
  display: block;
  width: 103px;
  height: 32px;
}

.bt-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  min-width: 0;
  font-size: 16px;
  line-height: 22px;
  color: #f4f5f7;
}

.bt-nav a {
  white-space: nowrap;
}

.bt-nav img {
  display: block;
  height: 24px;
  width: auto;
}

.bt-header__right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}

.bt-login {
  padding: 0 8px;
  font-size: 16px;
  line-height: 32px;
  white-space: nowrap;
}

.bt-register {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-width: 87px;
  height: 32px;
  padding: 0 18px;
  border-radius: 8px;
  background: #f4f5f7;
  color: #151517;
  font-size: 16px;
  font-weight: 500;
  line-height: 32px;
  white-space: nowrap;
}

.bt-icon {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f4f5f7;
}

.bt-icon svg {
  width: 20px;
  height: 20px;
}

.bt-menu {
  display: none;
}

.bt-main {
  padding: 80px 0 180px;
}

.bt-hero {
  position: relative;
  z-index: 2;
}

.bt-hero__inner {
  position: relative;
  z-index: 1;
  width: 1280px;
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 180px;
  padding: 0 20px;
}

.bt-hero__video {
  position: absolute;
  z-index: 0;
  top: -100px;
  left: 450px;
  width: 1215px;
  height: auto;
  object-fit: contain;
  pointer-events: none;
}

.bt-hero__copy {
  position: relative;
  z-index: 1;
  width: min(564px, 100%);
  flex: none;
}

.bt-hero h1 {
  max-width: 564px;
  font-size: 72px;
  font-weight: 700;
  line-height: 1.2;
  color: #f4f5f7;
}

.bt-hero__sub {
  margin-top: 24px;
  font-size: 20px;
  font-weight: 400;
  line-height: 28px;
  color: #8e8e92;
}

.bt-actions {
  margin-top: 70px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.bt-white,
.bt-square {
  height: 48px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  line-height: 22px;
}

.bt-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  background: #fff;
  color: #151517;
}

.bt-white img,
.bt-opt img,
.bt-store img {
  width: 20px;
  height: 20px;
  display: block;
  flex: none;
}

.bt-square {
  width: 48px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #252629;
  color: #f4f5f7;
}

.bt-square svg {
  width: 24px;
  height: 24px;
}

.bt-popwrap {
  position: relative;
}

.bt-pop {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 30;
  padding-top: 12px;
}

.bt-pop__panel {
  padding: 12px;
  border-radius: 12px;
  background: #17181a;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.bt-popwrap:hover .bt-pop,
.bt-popwrap:focus-within .bt-pop {
  display: block;
}

.bt-pop--app {
  width: 188px;
}

.bt-pop--desk {
  width: 243px;
}

.bt-pop--qr {
  width: 164px;
}

.bt-pop__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bt-opt,
.bt-store {
  display: flex;
  align-items: center;
  height: 58px;
  border-radius: 8px;
  background: #252629;
  color: #f4f5f7;
}

.bt-opt {
  gap: 10px;
  padding: 0 12px;
}

.bt-opt div,
.bt-store div {
  display: flex;
  flex-direction: column;
  text-align: start;
}

.bt-opt b,
.bt-store b {
  font-weight: 500;
  font-size: 16px;
  line-height: 1.25;
}

.bt-opt small,
.bt-store small {
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.3;
  color: #8e8e92;
}

.bt-qrimg {
  display: block;
  width: 140px;
  height: 140px;
}

.bt-qrlabel {
  margin-top: 4px;
  text-align: center;
  font-size: 12px;
  line-height: 1.2;
  color: #8e8e92;
}

.bt-banner {
  position: relative;
  z-index: 1;
  width: 408px;
  height: auto;
  flex: none;
}

.bt-block {
  width: 1280px;
  max-width: 100%;
  margin: 180px auto 0;
  padding: 0 20px;
  text-align: center;
}

.bt-block h2,
.bt-feature h2 {
  font-size: 48px;
  font-weight: 600;
  line-height: 1.25;
  color: #f4f5f7;
}

.bt-block p,
.bt-feature p {
  margin-top: 12px;
  font-size: 18px;
  line-height: 26px;
  color: #8e8e92;
}

.bt-stores {
  margin-top: 60px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.bt-store {
  width: 160px;
  justify-content: center;
  gap: 8px;
  padding: 0 8px;
}

.bt-guide {
  margin-top: 24px;
  font-size: 16px;
  line-height: 24px;
  color: #8e8e92;
}

.bt-guide button {
  padding: 0;
  border: 0;
  background: none;
  color: #03aac7;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}

.bt-feature {
  margin-top: 180px;
  text-align: center;
}

.bt-feature__video {
  display: block;
  width: 100%;
  height: auto;
  margin-top: -35px;
  object-fit: contain;
}

.bt-feature h2,
.bt-feature p {
  position: relative;
  z-index: 1;
}

.bt-footer {
  margin-top: 80px;
  background: #070808;
  color: #f4f5f7;
}

.bt-footer__cols {
  width: min(1140px, calc(100% - 48px));
  margin: 0 auto;
  padding: 60px 0 24px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  column-gap: 24px;
}

.bt-footer h2 {
  font-size: 18px;
  font-weight: 500;
  line-height: 26px;
}

.bt-footer__cols a {
  display: block;
  margin-top: 12px;
  color: #8e8e92;
  font-size: 16px;
  line-height: 24px;
}

.bt-footer__cols a:hover {
  color: #f4f5f7;
}

.bt-scan {
  width: 152px;
  margin-top: 24px;
}

.bt-scan__box {
  width: 152px;
  padding: 6px;
  border-radius: 8px;
  background: #fff;
}

.bt-scan img {
  display: block;
  width: 140px;
  height: 140px;
}

.bt-scan p {
  width: 152px;
  margin-top: 8px;
  text-align: center;
  font-size: 12px;
  line-height: 16.8px;
  color: #8e8e92;
}

.bt-footer__bar {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.bt-footer__bar-inner {
  width: min(1140px, calc(100% - 48px));
  margin: 0 auto;
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.bt-copy {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: #f4f5f7;
}

.bt-copy svg {
  width: 103px;
  height: 32px;
  color: #fff;
}

.bt-social {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bt-social a {
  width: 40px;
  height: 40px;
  position: relative;
}

.bt-social img {
  width: 40px;
  height: 40px;
  display: block;
}

.bt-social .is-hover {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.bt-social a:hover .is-hover {
  opacity: 1;
}

@media (max-width: 1280px) {
  .bt-hero__inner {
    flex-direction: column-reverse;
    flex-wrap: wrap;
    justify-content: center;
    gap: 68px;
    text-align: center;
  }

  .bt-hero__copy {
    width: 100%;
  }

  .bt-hero h1 {
    max-width: 100%;
  }

  .bt-hero__video {
    left: 50%;
    width: 1165px;
    max-width: 100%;
    transform: translateX(50%);
  }

  .bt-actions {
    margin-top: 60px;
    justify-content: center;
  }
}

@media (max-width: 1023px) {
  .bt-nav {
    display: none;
  }

  .bt-menu {
    display: block;
    position: relative;
  }

  .bt-menu summary {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    list-style: none;
    cursor: pointer;
  }

  .bt-menu summary::-webkit-details-marker {
    display: none;
  }

  .bt-menu__panel {
    position: absolute;
    top: 48px;
    right: 0;
    width: 220px;
    padding: 8px;
    border-radius: 12px;
    background: #17181a;
    display: flex;
    flex-direction: column;
  }

  .bt-menu__panel a {
    padding: 10px 12px;
    font-size: 14px;
  }

  .bt-footer__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 32px;
  }
}

@media (max-width: 767px) {
  .bt-main {
    padding: 20px 0 48px;
  }

  .bt-hero__inner {
    gap: 32px;
    padding: 0 16px;
  }

  .bt-hero__copy {
    width: max-content;
    max-width: 100%;
  }

  .bt-hero h1 {
    font-size: 48px;
    line-height: 1.25;
  }

  .bt-hero__video {
    left: 0;
    top: 0;
    width: 100%;
    max-width: none;
    transform: none;
  }

  .bt-actions {
    width: 100%;
    margin-top: 32px;
  }

  .bt-square,
  .bt-actions .bt-popwrap:nth-child(2),
  .bt-store--desk,
  .bt-scan {
    display: none;
  }

  .bt-actions .bt-popwrap:first-child,
  .bt-actions .bt-white {
    width: 100%;
  }

  .bt-actions .bt-white {
    justify-content: center;
  }

  .bt-banner {
    width: 220px;
  }

  .bt-block {
    margin-top: 48px;
    padding: 0 16px;
  }

  .bt-block h2 {
    font-size: 28px;
    line-height: 1.25;
  }

  .bt-feature {
    margin-top: 48px;
  }

  .bt-feature h2 {
    font-size: 24px;
    line-height: 1.25;
  }

  .bt-feature__video {
    margin-top: 46px;
  }

  .bt-stores {
    margin-top: 24px;
  }

  .bt-store {
    width: auto;
    flex: 1 1 calc(50% - 10px);
  }

  .bt-footer__bar-inner,
  .bt-social {
    flex-wrap: wrap;
  }
}