.page-contact {
  --ct-ink: var(--by-text);
  --ct-gap: clamp(18px, 3vw, 30px);
  --ct-hard: 12px 12px 0 rgba(3, 7, 14, .78);
  --ct-hard-sm: 8px 8px 0 rgba(3, 7, 14, .78);
  display: block;
  background: var(--by-void);
  color: var(--ct-ink);
  font-family: var(--by-font-sans);
  padding-bottom: clamp(56px, 9vw, 112px);
}

.page-contact .by-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: clamp(16px, 3.5vw, 26px);
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--by-muted);
}

.page-contact .by-crumbs a {
  color: var(--by-ice);
  text-decoration: none;
}

.page-contact .by-crumbs a:hover,
.page-contact .by-crumbs a:focus-visible {
  color: var(--by-cyan);
}

.page-contact .ct-masthead {
  position: relative;
  padding: clamp(22px, 5vw, 48px) 0 clamp(30px, 6vw, 62px);
  border-bottom: 1px solid var(--by-line);
}

.page-contact .ct-masthead__eyebrow {
  margin: 0 0 clamp(14px, 2.5vw, 22px);
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--by-ice);
}

.page-contact .ct-title {
  margin: 0;
  font-size: clamp(46px, 13vw, 124px);
  font-weight: 900;
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--ct-ink);
}

.page-contact .ct-lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.75;
  color: var(--ct-ink);
}

.page-contact .ct-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3.5vw, 30px);
}

.page-contact .ct-masthead__meta .by-meta {
  display: inline-block;
  border: 1px solid var(--by-line);
  padding: 6px 11px;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--by-ice);
}

/* ---------- section head ---------- */
.page-contact .ct-head {
  min-width: 0;
}

.page-contact .by-section__head {
  display: flex;
  gap: clamp(12px, 2vw, 22px);
  align-items: flex-start;
  padding: clamp(40px, 7vw, 76px) 0 clamp(18px, 3vw, 30px);
}

/* ---------- 01 channels ---------- */
.page-contact .ct-rail {
  display: grid;
  gap: var(--ct-gap);
}

.page-contact .ct-rail__cards {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
  min-width: 0;
}

.page-contact .ct-card {
  position: relative;
  background: var(--by-surface);
  border: 3px solid var(--by-line);
  box-shadow: var(--ct-hard);
  padding: clamp(22px, 3.2vw, 32px);
  transition: transform .32s var(--by-ease), border-color .32s var(--by-ease), box-shadow .32s var(--by-ease);
}

.page-contact .ct-card:hover {
  transform: translateY(-4px);
  border-color: var(--by-cyan);
  box-shadow: var(--ct-hard-sm);
}

.page-contact .ct-card .by-card__corner {
  position: absolute;
  top: 0;
  right: 0;
  padding: 5px 12px;
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--by-void);
  background: var(--by-hot);
}

.page-contact .ct-card:nth-child(2) .by-card__corner {
  background: var(--by-ice);
}

.page-contact .ct-card:nth-child(3) .by-card__corner {
  background: var(--by-cyan);
}

.page-contact .ct-card .by-card__title {
  margin: 0 0 12px;
  padding-right: 54px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--ct-ink);
}

.page-contact .ct-card .by-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--by-muted);
}

.page-contact .ct-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--by-line);
}

.page-contact .ct-line__k {
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--by-muted);
}

.page-contact .ct-line__v {
  font-family: var(--by-font-mono);
  font-size: clamp(14px, 2vw, 16px);
  letter-spacing: .02em;
  color: var(--by-ice);
  word-break: break-word;
}

.page-contact .ct-side {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  align-content: start;
  min-width: 0;
}

.page-contact .ct-side__block {
  border: 3px solid var(--by-line);
  border-top: 6px solid var(--by-hot);
  background: var(--by-surface);
  padding: clamp(20px, 3vw, 28px);
}

.page-contact .ct-side__label {
  margin: 0;
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--by-muted);
}

.page-contact .ct-side__big {
  margin: 10px 0 0;
  font-family: var(--by-font-mono);
  font-size: clamp(42px, 9vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--by-hot);
}

.page-contact .ct-side__big span {
  margin-left: 6px;
  font-size: .32em;
  letter-spacing: .08em;
  color: var(--by-muted);
}

.page-contact .ct-side__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--by-muted);
}

.page-contact .ct-facts {
  margin: 0;
  border: 1px solid var(--by-line);
  background: rgba(14, 24, 48, .5);
}

.page-contact .ct-facts__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--by-line);
  font-family: var(--by-font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
}

.page-contact .ct-facts__row:last-child {
  border-bottom: 0;
}

.page-contact .ct-facts dt {
  color: var(--by-muted);
}

.page-contact .ct-facts dd {
  margin: 0;
  color: var(--ct-ink);
}

/* ---------- route figure ---------- */
.page-contact .ct-route {
  padding-top: clamp(34px, 6vw, 62px);
}

.page-contact .ct-route__figure {
  position: relative;
  margin: 0;
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  box-shadow: var(--ct-hard);
  overflow: hidden;
}

.page-contact .ct-route__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.06);
}

.page-contact .ct-route__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding: 14px 18px;
  border-top: 1px solid var(--by-line);
  font-family: var(--by-font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--by-muted);
}

.page-contact .ct-route__cap .by-meta {
  color: var(--by-ice);
  letter-spacing: .06em;
}

/* ---------- 02 prepare ---------- */
.page-contact .ct-picker {
  border: 1px solid var(--by-line);
  border-left: 5px solid var(--by-cyan);
  background: rgba(0, 240, 224, .05);
  padding: clamp(16px, 2.4vw, 22px);
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-contact .ct-picker__label {
  margin: 0 0 12px;
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--by-muted);
}

.page-contact .ct-picker__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-picker__item {
  border: 2px solid var(--by-line);
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--by-muted);
  transition: border-color .3s var(--by-ease), color .3s var(--by-ease);
}

.page-contact .ct-picker__item.is-active {
  border-color: var(--by-cyan);
  background: var(--by-cyan);
  color: var(--by-void);
}

.page-contact .ct-picker__hint {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--by-muted);
}

.page-contact .ct-checklist {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-check {
  display: flex;
  gap: clamp(14px, 2.4vw, 22px);
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  padding: clamp(18px, 3vw, 26px);
  transition: border-color .3s var(--by-ease);
}

.page-contact .ct-check:hover {
  border-color: var(--by-hot);
}

.page-contact .ct-check__num {
  flex: 0 0 auto;
  font-family: var(--by-font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--by-hot);
}

.page-contact .ct-check__body {
  min-width: 0;
}

.page-contact .ct-check__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.1vw, 20px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ct-ink);
}

.page-contact .ct-check__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--by-muted);
}

/* ---------- 03 flow ---------- */
.page-contact .ct-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-step {
  position: relative;
  margin-left: 7px;
  padding: 0 0 clamp(26px, 4.4vw, 42px) clamp(34px, 5vw, 54px);
  border-left: 2px solid var(--by-line);
}

.page-contact .ct-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .ct-step::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--by-void);
  border: 2px solid var(--by-cyan);
}

.page-contact .ct-step:nth-child(2)::before {
  border-color: var(--by-ice);
}

.page-contact .ct-step:nth-child(4)::before {
  border-color: var(--by-hot);
}

.page-contact .ct-step__idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--by-ice);
}

.page-contact .ct-step__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.3vw, 23px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ct-ink);
}

.page-contact .ct-step__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--by-muted);
}

/* ---------- 04 venue ---------- */
.page-contact .ct-venue__grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  align-items: start;
}

.page-contact .ct-venue__media {
  margin: 0;
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  box-shadow: var(--ct-hard);
  overflow: hidden;
}

.page-contact .ct-venue__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.88) contrast(1.06);
}

.page-contact .ct-venue__info {
  display: grid;
  gap: clamp(12px, 2vw, 16px);
  min-width: 0;
}

.page-contact .ct-venue__cell {
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  padding: 15px 18px;
}

.page-contact .ct-venue__cell--legal {
  border-style: dashed;
  border-color: var(--by-ice);
  background: transparent;
}

.page-contact .ct-venue__k {
  margin: 0 0 7px;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--by-muted);
}

.page-contact .ct-venue__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ct-ink);
}

.page-contact .ct-venue__v--mono {
  font-family: var(--by-font-mono);
  letter-spacing: .04em;
  color: var(--by-ice);
}

.page-contact .ct-fold {
  border: 3px solid var(--by-line);
  background: var(--by-surface);
}

.page-contact .ct-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ct-ink);
  cursor: pointer;
  list-style: none;
}

.page-contact .ct-fold summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-fold summary::after {
  content: "+";
  font-family: var(--by-font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--by-cyan);
}

.page-contact .ct-fold[open] summary::after {
  content: "–";
}

.page-contact .ct-fold__body {
  padding: 0 18px 16px;
  border-top: 1px solid var(--by-line);
}

.page-contact .ct-fold__body ul {
  display: grid;
  gap: 9px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-fold__body li {
  position: relative;
  padding-left: 17px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--by-muted);
}

.page-contact .ct-fold__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 8px;
  height: 2px;
  background: var(--by-ice);
}

/* ---------- 05 self-serve ---------- */
.page-contact .ct-self__grid {
  display: grid;
  gap: clamp(14px, 2.4vw, 20px);
}

.page-contact .ct-self__link {
  display: block;
  position: relative;
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  padding: clamp(20px, 3vw, 26px) clamp(20px, 3vw, 26px) clamp(40px, 5vw, 48px);
  text-decoration: none;
  color: var(--ct-ink);
  transition: transform .32s var(--by-ease), border-color .32s var(--by-ease);
}

.page-contact .ct-self__link:hover,
.page-contact .ct-self__link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--by-cyan);
}

.page-contact .ct-self__link::after {
  content: "→";
  position: absolute;
  right: 20px;
  bottom: 16px;
  font-family: var(--by-font-mono);
  font-size: 17px;
  color: var(--by-cyan);
}

.page-contact .ct-self__tag {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--by-ice);
}

.page-contact .ct-self__title {
  margin: 0 0 9px;
  font-size: clamp(17px, 2.1vw, 20px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ct-ink);
}

.page-contact .ct-self__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--by-muted);
}

/* ---------- to top ---------- */
.page-contact .by-to-top {
  display: block;
  margin: clamp(38px, 6vw, 64px) 0 0 auto;
  border: 3px solid var(--by-line);
  background: var(--by-surface);
  color: var(--by-ice);
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  padding: 11px 18px;
  cursor: pointer;
  transition: border-color .28s var(--by-ease), color .28s var(--by-ease);
}

.page-contact .by-to-top:hover,
.page-contact .by-to-top:focus-visible {
  border-color: var(--by-cyan);
  color: var(--by-cyan);
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-contact .ct-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-self__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-contact .ct-rail {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(26px, 3.6vw, 52px);
    align-items: start;
  }

  .page-contact .ct-rail__cards {
    gap: 20px;
  }

  .page-contact .ct-rail__cards .ct-card:nth-child(1) {
    margin-right: 13%;
  }

  .page-contact .ct-rail__cards .ct-card:nth-child(2) {
    margin-left: 11%;
    margin-right: 3%;
  }

  .page-contact .ct-rail__cards .ct-card:nth-child(3) {
    margin-right: 17%;
  }

  .page-contact .ct-venue__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .ct-step {
    padding-left: clamp(40px, 4vw, 62px);
  }
}

@media (min-width: 1200px) {
  .page-contact .ct-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(30px, 4vw, 64px);
    row-gap: clamp(28px, 4vw, 44px);
  }

  .page-contact .ct-step {
    padding-bottom: 0;
  }

  .page-contact .ct-step:nth-child(1),
  .page-contact .ct-step:nth-child(2) {
    border-left-color: var(--by-line);
  }
}