.page-contact {
  --ch-gap: clamp(16px, 3vw, 28px);
  --ch-line: 1px solid var(--line);
  display: block;
  position: relative;
  isolation: isolate;
}

.page-contact *,
.page-contact *::before,
.page-contact *::after {
  box-sizing: border-box;
}

.page-contact h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.015em;
}

.page-contact h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-contact .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-contact .media-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: var(--ch-line);
  background: var(--layer);
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-size: var(--fs-xs);
  color: var(--white);
  background: linear-gradient(0deg, rgba(7, 7, 12, 0.92), rgba(7, 7, 12, 0));
}

/* ---------- hero ---------- */

.page-contact .ch-hero {
  position: relative;
  padding-top: calc(var(--header-h) + 26px);
}

.page-contact .ch-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: -12%;
  width: 78%;
  height: 360px;
  background: radial-gradient(58% 60% at 34% 40%, rgba(124, 59, 255, 0.3), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-contact .ch-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 20px;
}

.page-contact .ch-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.022em;
}

.page-contact .ch-lede {
  margin: 18px 0 0;
  max-width: var(--measure);
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .ch-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  font-size: var(--fs-xs);
  color: var(--muted);
}

.page-contact .ch-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 16px;
  border-left: 1px solid var(--line);
  line-height: 1.5;
}

.page-contact .ch-facts li:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-contact .ch-facts .mono {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--lime);
}

.page-contact .ch-facts a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 217, 255, 0.4);
}

.page-contact .ch-facts a:hover {
  border-bottom-color: var(--cyan);
}

.page-contact .ch-hero__media img {
  aspect-ratio: 16 / 9;
}

/* ---------- channels ---------- */

.page-contact .ch-channels__top {
  display: grid;
  gap: 26px;
}

.page-contact .ch-sub {
  max-width: var(--measure);
  margin: 14px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.76;
  color: var(--muted);
}

.page-contact .ch-channel-visual img {
  aspect-ratio: 5 / 3;
}

.page-contact .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.page-contact .filter-chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: var(--fs-xs);
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-contact .filter-chip:hover {
  color: var(--white);
  border-color: var(--violet);
}

.page-contact .filter-chip[aria-pressed="true"],
.page-contact .filter-chip.is-active {
  background: var(--violet);
  border-color: var(--lime);
  color: var(--white);
}

.page-contact .filter-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--lime);
}

.page-contact .filter-status {
  margin: 12px 0 0;
  font-size: var(--fs-xs);
  color: var(--muted);
}

.page-contact [data-filter-hidden] {
  display: none;
}

.page-contact .ch-channel-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: var(--ch-gap);
}

.page-contact .ch-card {
  --ch-accent: var(--violet);
  position: relative;
  padding: 24px 22px 26px;
  background: var(--panel);
  border: var(--ch-line);
  box-shadow: var(--shadow-panel);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-contact .ch-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--ch-accent), rgba(124, 59, 255, 0) 80%);
}

.page-contact .ch-card:hover {
  transform: translateY(-4px);
  border-color: var(--ch-accent);
  box-shadow: var(--shadow-panel), 0 0 0 1px rgba(124, 59, 255, 0.22);
}

.page-contact .ch-card--hot {
  --ch-accent: var(--lime);
}

.page-contact .ch-card--mail {
  --ch-accent: var(--cyan);
}

.page-contact .ch-card--ticket {
  --ch-accent: var(--violet);
}

.page-contact .ch-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.page-contact .ch-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ch-accent);
  box-shadow: 0 0 12px -2px var(--ch-accent);
  flex: none;
}

.page-contact .ch-card__use {
  margin: 14px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--white);
}

.page-contact .ch-card__dl {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .ch-card__dl dt {
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 2px;
}

.page-contact .ch-card__dl dd {
  margin: 0;
}

.page-contact .ch-card__contact {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-contact .ch-card__contact .mono {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ch-accent);
  word-break: break-all;
}

.page-contact .ch-card__contact .btn {
  word-break: normal;
}

/* ---------- flow ---------- */

.page-contact .ch-flow__grid {
  display: grid;
  gap: 30px;
}

.page-contact .ch-flow__text {
  max-width: var(--measure);
  margin: 18px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .ch-template {
  margin-top: 28px;
  border: var(--ch-line);
  border-left: 3px solid var(--cyan);
  background: var(--panel);
}

.page-contact .ch-template summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 17px 20px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

.page-contact .ch-template summary::-webkit-details-marker {
  display: none;
}

.page-contact .ch-template summary .mono {
  font-size: var(--fs-xs);
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-contact .ch-template summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-contact .ch-template[open] summary::after {
  content: "－";
}

.page-contact .ch-template__list {
  margin: 0;
  padding: 2px 22px 24px 42px;
  display: grid;
  gap: 11px;
  font-size: var(--fs-xs);
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .ch-template__list strong {
  color: var(--white);
}

.page-contact .ch-aside {
  padding: 24px 22px 26px;
}

.page-contact .ch-aside__title {
  font-size: var(--fs-sm);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-contact .ch-aside__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .ch-aside__list li {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .ch-aside__list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .ch-aside__list a {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 217, 255, 0.5);
}

.page-contact .ch-aside__list a:hover {
  color: var(--cyan);
}

.page-contact .ch-aside__list span {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-xs);
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .ch-aside__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- partner ---------- */

.page-contact .ch-partner__panel {
  padding: 30px 22px 32px;
}

.page-contact .ch-partner__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-contact .ch-partner__list li {
  padding-left: 16px;
  border-left: 2px solid var(--violet);
}

.page-contact .ch-partner__list h3 {
  font-size: var(--fs-sm);
  font-weight: 800;
}

.page-contact .ch-partner__list p {
  margin: 8px 0 0;
  font-size: var(--fs-xs);
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .ch-partner__send {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .ch-partner__send .mono {
  color: var(--lime);
  word-break: break-all;
}

/* ---------- registry ---------- */

.page-contact .ch-registry__title {
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .ch-registry__inner {
  margin-top: 16px;
  padding: 20px 20px;
  border: var(--ch-line);
  border-top: 2px solid var(--violet);
  background: var(--panel);
  display: grid;
  gap: 18px;
}

.page-contact .ch-stamp {
  display: inline-block;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: var(--layer);
}

.page-contact .ch-registry__item p {
  margin: 10px 0 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--white);
  word-break: break-all;
}

.page-contact .ch-registry__note {
  margin: 14px 0 0;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-contact .ch-registry__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }

  .page-contact .ch-partner__panel {
    padding: 36px 32px 38px;
  }

  .page-contact .ch-partner__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }
}

@media (min-width: 900px) {
  .page-contact .ch-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 40px;
  }

  .page-contact .ch-hero__media img {
    aspect-ratio: 3 / 2;
  }

  .page-contact .ch-channels__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
    align-items: end;
    gap: 40px;
  }

  .page-contact .ch-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 46px;
  }
}

@media (min-width: 1024px) {
  .page-contact .ch-channel-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 26px;
  }

  .page-contact .ch-channel-list > :nth-child(2) {
    margin-top: 48px;
  }

  .page-contact .ch-channel-list > :nth-child(3) {
    margin-top: 96px;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .ch-card,
  .page-contact .filter-chip {
    transition: none;
  }

  .page-contact .ch-card:hover {
    transform: none;
  }
}