.site-header.has-utility-nav {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(20px, 2.8vw, 48px);
}

.site-header.has-utility-nav .main-menu {
  width: min(620px, 100%);
  justify-self: end;
}

.utility-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.1vw, 34px);
  padding-left: clamp(20px, 2.1vw, 34px);
  border-left: 1px solid rgba(244, 243, 240, 0.16);
}

@media (min-width: 721px) {
  .site-header .utility-nav {
    position: relative;
    border-left-color: transparent;
  }

  .site-header .utility-nav::before {
    position: absolute;
    top: 0;
    bottom: 0;
    left: var(--utility-divider-left, -1px);
    width: 1px;
    background: rgba(244, 243, 240, 0.16);
    content: "";
    pointer-events: none;
  }
}

.utility-link {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 6px;
  min-width: 0;
  padding: 10px 0;
  border: 0;
  background: transparent;
  color: rgba(244, 243, 240, 0.78);
  font: inherit;
  font-size: 0.65rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: color 220ms ease;
}

.utility-link span[lang="zh-CN"] {
  color: rgba(244, 243, 240, 0.58);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  transition: color 220ms ease;
}

.utility-link::after {
  position: absolute;
  right: 16%;
  bottom: 2px;
  left: 16%;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transition: transform 220ms ease;
}

.utility-link:hover,
.utility-link[aria-current="page"],
.utility-link:focus-visible {
  color: #fff;
}

.utility-link:hover span[lang="zh-CN"],
.utility-link[aria-current="page"] span[lang="zh-CN"],
.utility-link:focus-visible span[lang="zh-CN"] {
  color: rgba(244, 243, 240, 0.78);
}

.utility-link:hover::after,
.utility-link[aria-current="page"]::after,
.utility-link:focus-visible::after {
  transform: scaleX(1);
}

.utility-link:focus,
.project-header-contact:focus,
.project-contact-link:focus,
#contact-dialog button:focus {
  outline: none;
  box-shadow: none;
}

.page-intro-contact { display: none; }

.nav-link.mobile-home-link { display: none; }

@media (max-width: 360px) {
  .main-menu:has(> .mobile-home-link) .nav-link {
    font-size: 0.44rem;
    letter-spacing: 0.04em;
  }
}

.project-contact-link {
  grid-column: 2;
  grid-row: 1;
  justify-self: center;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 6px;
  min-height: 36px;
  padding: 0;
  border: 0;
  color: rgba(244, 243, 240, 0.82);
  background: transparent;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-align: center;
  cursor: pointer;
}

.project-contact-link span:last-child {
  color: rgba(244, 243, 240, 0.48);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-contact-link:hover {
  color: white;
}

.project-header-contact {
  position: absolute;
  z-index: 5;
  grid-row: 1 / 2;
  top: 0;
  bottom: 0;
  /* Mirror the centre of the 30px close button, not just its outer edge. */
  right: 15px;
  transform: translateX(50%);
  display: grid;
  place-items: center;
  min-width: 44px;
  height: 30px;
  margin: auto 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: rgba(244, 243, 240, 0.82);
  font: inherit;
  font-size: 0.62rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.project-header-contact:hover { color: #fff; }

.project-actions {
  width: min(1180px, 100%);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: center;
  gap: 20px;
  margin: 0 auto;
  padding: clamp(24px, 3vw, 38px) 0;
  border-top: 1px solid rgba(244, 243, 240, 0.2);
}
.project-crew[hidden] + .project-actions,
.scroll-gallery + .project-actions { margin-top: clamp(36px, 5vw, 64px); }
.project-actions .project-bts {
  grid-column: 1;
  grid-row: 1;
  width: auto;
  margin: 0;
  padding: 0;
  border: 0;
}
.project-actions .project-next {
  grid-column: 3;
  grid-row: 1;
  width: 100%;
  min-width: 0;
  margin: 0;
  border: 0;
}

/* Without BTS, balance the two remaining actions across the full row. */
.project-actions:has(> .project-bts[hidden]) {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.project-actions:has(> .project-bts[hidden]) > .project-contact-link {
  grid-column: 1;
  justify-self: start;
}
.project-actions:has(> .project-bts[hidden]) > .project-next {
  grid-column: 2;
}
.project-actions .project-next-button {
  width: max-content;
  max-width: 100%;
  margin-left: auto;
  grid-template-columns: auto auto;
  gap: 14px;
  min-height: 36px;
  padding: 0;
  color: rgba(244, 243, 240, 0.82);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.4;
  text-align: right;
}
.project-actions .project-next-label {
  grid-column: 1;
  grid-row: 1;
  display: grid;
  justify-items: center;
  gap: 6px;
  color: inherit;
  font-size: inherit;
  letter-spacing: 0.08em;
  text-align: center;
}
.project-actions .project-bts-link {
  display: grid;
  width: max-content;
  max-width: 100%;
  grid-template-columns: auto auto;
  align-items: center;
  align-content: center;
  justify-items: center;
  gap: 6px 14px;
  min-height: 36px;
  color: rgba(244, 243, 240, 0.82);
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-align: center;
}
.project-actions .project-bts-link > span,
.project-contact-link > span,
.project-actions .project-next-label > span { white-space: nowrap; }
.project-actions .project-bts-link > span:nth-child(1) { grid-column: 1; grid-row: 1; }
.project-actions .project-bts-link > span:nth-child(2) { grid-column: 1; grid-row: 2; }
.project-actions .project-bts-link > span:last-child { grid-column: 2; grid-row: 1 / 3; }
.project-actions .project-bts-link > span:nth-child(2),
.project-actions .project-next-label > span:last-child {
  color: rgba(244, 243, 240, 0.48);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
}
.project-actions .project-next-arrow { grid-column: 2; grid-row: 1; }
.project-actions .project-bts-link > span:last-child,
.project-actions .project-next-arrow {
  width: 1em;
  color: rgba(244, 243, 240, 0.72);
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  transition: transform 180ms ease;
}
.project-actions .project-bts-link:hover > span:last-child,
.project-actions .project-bts-link:focus-visible > span:last-child,
.project-actions .project-next-button:hover .project-next-arrow,
.project-actions .project-next-button:focus-visible .project-next-arrow { transform: translateX(3px); }
.project-actions .project-bts-link:hover,
.project-actions .project-next-button:hover { color: #fff; }
.project-actions .project-next-button:focus { outline: none; box-shadow: none; }

.bts-utility-nav {
  justify-content: flex-end;
  gap: 24px;
  margin-bottom: 20px;
  padding: 0;
  border: 0;
}

/* Self-contained modal styling also supports the standalone BTS page. */
#contact-dialog {
  position: fixed;
  inset: 50% auto auto 50%;
  width: min(1160px, calc(100vw - 72px));
  max-width: none;
  max-height: calc(100dvh - 56px);
  margin: 0;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(8, 8, 8, 0.96);
  color: #f4f3f0;
  font-family: Futura, "Futura PT", "Century Gothic", "Avenir Next", sans-serif;
  text-align: left;
  transform: translate(-50%, -50%);
}

#contact-dialog[open] { opacity: 1; pointer-events: auto; }
#contact-dialog::backdrop { background: rgba(0, 0, 0, 0.72); backdrop-filter: blur(5px); }
#contact-dialog .info-close {
  position: absolute;
  top: 17px;
  right: 22px;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 1.6rem;
  cursor: pointer;
}
#contact-dialog .contact-panel { min-height: 600px; padding: clamp(46px, 5vw, 70px); }
#contact-dialog .contact-heading { max-width: none; margin-bottom: 44px; }
#contact-dialog .contact-title { margin: 14px 0 0; font-size: clamp(2rem, 2.7vw, 2.75rem); font-weight: 300; letter-spacing: 0.02em; line-height: 1.35; }
#contact-dialog .contact-title span { display: block; }
#contact-dialog .contact-title span:first-child { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }
#contact-dialog .contact-title span:last-child { margin-top: 0.4em; color: rgba(244, 243, 240, 0.64); font-size: 0.4em; letter-spacing: 0.035em; line-height: 1.65; }
#contact-dialog .contact-groups { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr); gap: clamp(48px, 6vw, 92px); }
#contact-dialog .contact-group h3 { display: flex; align-items: center; gap: 12px; min-height: 26px; margin: 0 0 16px; font-size: 0.83rem; font-weight: 400; letter-spacing: 0.16em; line-height: 1.2; text-transform: uppercase; }
#contact-dialog .contact-group h3 span:first-child { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 0.94rem; letter-spacing: 0.1em; }
#contact-dialog .contact-list { margin: 0; }
#contact-dialog .contact-list > div { display: grid; grid-template-columns: minmax(100px, 0.8fr) minmax(0, 1.2fr); gap: 18px; padding: 12px 0; border: 0; }
#contact-dialog .contact-group:first-child .contact-list > div { grid-template-columns: 84px minmax(0, 1fr); }
#contact-dialog .contact-list dt, #contact-dialog .contact-list dd { margin: 0; }
#contact-dialog .contact-list dt { display: grid; gap: 4px; color: rgba(244, 243, 240, 0.5); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase; }
#contact-dialog .contact-list dt span:first-child { color: rgba(244, 243, 240, 0.78); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 0.76rem; letter-spacing: 0.08em; text-transform: none; }
#contact-dialog .contact-list dd { min-width: 0; font-size: 0.88rem; letter-spacing: 0.04em; }
#contact-dialog .contact-group:first-child .contact-list dd { font-size: 1.04rem; }
#contact-dialog .copy-account { display: inline-flex; align-items: baseline; gap: 8px; max-width: 100%; padding: 0; border: 0; background: transparent; color: inherit; font: inherit; letter-spacing: inherit; text-align: left; cursor: pointer; }
#contact-dialog .copy-account > span:first-child { white-space: nowrap; overflow-wrap: normal; }
#contact-dialog .copy-account-status { flex: 0 0 auto; color: rgba(244, 243, 240, 0.7); font-size: 0.65rem; }
#contact-dialog .copy-account:hover > span:first-child, #contact-dialog .copy-account:focus-visible > span:first-child { text-decoration: underline; text-underline-offset: 0.22em; }
#contact-dialog .contact-collaboration { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(48px, 6vw, 92px); margin-top: 44px; padding-top: 28px; border-top: 1px solid rgba(255, 255, 255, 0.12); }
#contact-dialog .contact-collaboration p { margin: 0; color: rgba(244, 243, 240, 0.64); font-size: 0.82rem; line-height: 1.7; }
#contact-dialog .contact-collaboration p[lang="zh-CN"] { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }

@media (min-width: 721px) {
  #contact-dialog .contact-collaboration p {
    color: rgba(244, 243, 240, 0.74);
    font-size: clamp(0.9375rem, 1.1vw, 1rem);
    line-height: 1.8;
  }
  #contact-dialog .contact-collaboration p[lang="zh-CN"] {
    color: rgba(244, 243, 240, 0.82);
    line-height: 1.85;
  }
}

@media (min-width: 721px) and (max-width: 1100px) {
  .site-header.has-utility-nav { gap: 20px; }
  .site-header.has-utility-nav .nav-link { font-size: 0.58rem; letter-spacing: 0.12em; }
  .site-header.has-utility-nav .brand-role { font-size: 0.48rem; letter-spacing: 0.25em; }
  .utility-nav { gap: 18px; padding-left: 18px; }
  .utility-link { font-size: 0.58rem; }
}

@media (min-width: 721px) and (max-width: 900px) {
  #contact-dialog .contact-groups { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 720px) {
  .nav-link.mobile-home-link { display: grid; }
  .site-header .main-menu {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
  }
  .site-header .main-menu .nav-link {
    flex: 0 0 auto;
    grid-template-rows: 10px 11px;
    align-items: center;
    justify-items: center;
    gap: 6px;
    padding: 8px 0;
    text-align: center;
  }
  body.narrative-page:has(.page-intro .page-intro-contact) { --header-h: 76px; }
  body:has(.page-intro-contact) .site-header.has-utility-nav { grid-template-rows: auto; }
  body:has(.page-intro-contact) .site-header > .utility-nav { display: none; }
  .page-intro:has(.page-intro-contact) > p { display: none; }
  .page-intro:has(.page-intro-contact) { align-items: center; }
  .page-intro-contact {
    display: grid;
    flex: 0 0 auto;
    justify-items: end;
    margin-left: auto;
    text-align: right;
    gap: 5px;
    padding: 4px 0;
    font-size: 0.48rem;
    letter-spacing: 0.08em;
  }
  .page-intro-contact span[lang="zh-CN"] { font-size: 0.54rem; }
  .project-header-contact { font-size: 0.55rem; letter-spacing: 0.06em; }
  body:has(.site-header.has-utility-nav) { --header-h: 110px; }
  body.about-page:has(.site-header.has-utility-nav) { --header-h: 76px; }
  .about-page .site-header.has-utility-nav { grid-template-rows: auto; }
  .about-page .site-header.has-utility-nav > .utility-nav { display: none; }
  .site-header.has-utility-nav {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    align-content: center;
    width: 100%;
    height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
    gap: 6px;
    padding: calc(8px + env(safe-area-inset-top, 0px)) 20px 8px;
  }
  .site-header.has-utility-nav .brand { display: none; }
  .site-header.has-utility-nav .main-menu { width: 100%; flex-basis: auto; }
  .site-header.has-utility-nav .utility-nav { justify-self: end; gap: 24px; padding: 0; border: 0; }
  .site-header.has-utility-nav .utility-link { display: flex; gap: 6px; min-height: 32px; padding: 6px 0; font-size: 0.55rem; letter-spacing: 0.06em; }
  .site-header.has-utility-nav .utility-link span[lang="zh-CN"] { font-size: 0.62rem; }
  .project-actions { gap: 10px; padding: 22px 0; }
  .project-actions .project-bts-link { gap: 5px 6px; font-size: 0.56rem; letter-spacing: 0.04em; }
  .project-contact-link { gap: 5px; font-size: 0.56rem; }
  .project-actions .project-next-button { gap: 6px; font-size: 0.56rem; }
  .project-actions .project-next-label { gap: 5px; letter-spacing: 0.04em; }
  .project-contact-link span:last-child,
  .project-actions .project-bts-link > span:nth-child(2),
  .project-actions .project-next-label > span:last-child { font-size: clamp(0.36rem, 1.65vw, 0.44rem); letter-spacing: 0.06em; }
  .project-actions .project-bts-link > span:last-child,
  .project-actions .project-next-arrow { font-size: 0.7rem; }
  .project-dialog .dialog-header { padding-inline: 54px; }
  .bts-utility-nav { gap: 20px; }
  .bts-utility-nav .utility-link { gap: 5px; font-size: 0.55rem; }
  .bts-header:has(.bts-utility-nav) { padding-inline: 54px; }
  #contact-dialog { width: calc(100vw - 24px); max-height: calc(100dvh - 24px); }
  #contact-dialog .contact-panel { min-height: 0; padding: 42px 22px 26px; }
  #contact-dialog .contact-heading { margin-bottom: 26px; }
  #contact-dialog .contact-title { font-size: 1.45rem; }
  #contact-dialog .contact-title span:last-child { margin-top: 8px; font-size: 0.55em; }
  #contact-dialog .contact-groups { grid-template-columns: 1fr; gap: 26px; }
  #contact-dialog .contact-group h3 { min-height: 22px; margin-bottom: 9px; }
  #contact-dialog .contact-list > div { grid-template-columns: 80px minmax(0, 1fr); gap: 12px; padding: 7px 0; }
  #contact-dialog .contact-group:first-child .contact-list > div { grid-template-columns: 1fr; gap: 3px; }
  #contact-dialog .contact-group:first-child .contact-list dd { font-size: 0.9rem; }
  #contact-dialog .contact-collaboration { grid-template-columns: 1fr; gap: 12px; margin-top: 24px; padding-top: 18px; }
  #contact-dialog .contact-collaboration p { font-size: 0.72rem; line-height: 1.5; }
}