.page-contact {
  --ct-cut: 16px;
  --ct-gap: 22px;
  background:
    radial-gradient(120% 82% at 10% -6%, rgba(255, 90, 54, 0.11), transparent 58%),
    radial-gradient(86% 72% at 94% 2%, rgba(56, 214, 224, 0.07), transparent 62%),
    var(--bg-night);
  color: var(--text);
}

.page-contact .section {
  padding: 40px 0;
}

.page-contact .contact-hero {
  position: relative;
  padding-top: 34px;
  padding-bottom: 10px;
}

.page-contact .contact-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero h1 {
  max-width: 19ch;
  margin: 14px 0 16px;
  font-size: clamp(29px, 5.2vw, 50px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.012em;
}

.page-contact .contact-hero .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.78;
}

.page-contact .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-contact .section__head {
  max-width: 70ch;
  margin-bottom: 26px;
}

.page-contact .section__head h2 {
  margin: 10px 0 12px;
  font-size: clamp(22px, 3.1vw, 32px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .section__head p {
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.78;
}

/* ---------- 渠道板块 ---------- */

.page-contact .contact-figure {
  margin: 0 0 30px;
}

.page-contact .contact-figure .figure__frame {
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(18, 50, 74, 0.88), rgba(7, 14, 31, 0.94));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  overflow: hidden;
}

.page-contact .contact-figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .contact-figure .figure__cap {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

.page-contact .contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
}

.page-contact .channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .channel-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 16px;
  background: linear-gradient(152deg, rgba(18, 50, 74, 0.92), rgba(14, 26, 51, 0.88));
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 0.2s var(--ease), border-left-color 0.2s var(--ease);
}

.page-contact .channel-item:hover {
  transform: translateY(-2px);
  border-left-color: var(--accent-warm);
}

.page-contact .channel-item__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: var(--accent);
  border: 1px solid rgba(255, 90, 54, 0.34);
  background: rgba(255, 90, 54, 0.08);
  clip-path: polygon(0 0, 100% 0, 100% 76%, 76% 100%, 0 100%);
}

.page-contact .channel-item__body {
  min-width: 0;
}

.page-contact .channel-item__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .channel-item__value {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--text);
  word-break: break-word;
}

.page-contact .channel-item__desc {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

.page-contact .channel-side {
  min-width: 0;
}

.page-contact .hours-card {
  position: relative;
  padding: 24px 20px 22px;
  background: linear-gradient(160deg, rgba(14, 26, 51, 0.96), rgba(7, 14, 31, 0.94));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--ct-cut)) 0, 100% var(--ct-cut), 100% 100%, var(--ct-cut) 100%, 0 calc(100% - var(--ct-cut)));
  overflow: hidden;
}

.page-contact .hours-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), rgba(255, 138, 61, 0.2) 62%, transparent);
}

.page-contact .hours-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-contact .hours-card__head h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .hours-card__note {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .hours-scale {
  margin-bottom: 16px;
}

.page-contact .hours-rail {
  position: relative;
  height: 34px;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(30, 42, 68, 0.85) 0 1px, transparent 1px 8.3333%),
    linear-gradient(180deg, rgba(14, 26, 51, 0.92), rgba(7, 14, 31, 0.92));
  overflow: hidden;
}

.page-contact .hours-online {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 37.5%;
  width: 37.5%;
  background: linear-gradient(180deg, rgba(255, 90, 54, 0.42), rgba(255, 90, 54, 0.12));
  border-left: 1px solid var(--accent);
  border-right: 1px solid var(--accent);
}

.page-contact .hours-labels {
  position: relative;
  height: 16px;
  margin-top: 10px;
}

.page-contact .hours-label {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  white-space: nowrap;
}

.page-contact .hours-label--0 {
  left: 0;
  transform: none;
}

.page-contact .hours-label--25 {
  left: 25%;
}

.page-contact .hours-label--50 {
  left: 50%;
}

.page-contact .hours-label--75 {
  left: 75%;
}

.page-contact .hours-label--100 {
  left: 100%;
  transform: translateX(-100%);
}

.page-contact .hours-legend {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-contact .hours-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-contact .dot {
  width: 9px;
  height: 9px;
  display: inline-block;
}

.page-contact .dot--accent {
  background: var(--accent);
}

.page-contact .dot--muted {
  background: var(--line);
}

.page-contact .hours-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .hours-facts li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(30, 42, 68, 0.7);
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--text);
}

.page-contact .hours-facts li:last-child {
  border-bottom: 0;
}

.page-contact .hours-facts .mono {
  color: var(--accent-warm);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

/* ---------- 勘误板块 ---------- */

.page-contact .errata-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-contact .errata-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-contact .errata-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 12px 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s var(--ease);
}

.page-contact .errata-item:hover {
  background: rgba(18, 50, 74, 0.42);
}

.page-contact .errata-num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 34px;
  border: 1px solid rgba(255, 90, 54, 0.42);
  background: rgba(255, 90, 54, 0.08);
  color: var(--accent);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.page-contact .errata-item__body {
  min-width: 0;
}

.page-contact .errata-item__body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.page-contact .errata-item__body p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.74;
}

.page-contact .errata-figure {
  margin: 0;
  align-self: start;
}

.page-contact .errata-figure .figure__frame {
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 50, 74, 0.9), rgba(7, 14, 31, 0.94));
  clip-path: polygon(0 0, calc(100% - var(--ct-cut)) 0, 100% var(--ct-cut), 100% 100%, var(--ct-cut) 100%, 0 calc(100% - var(--ct-cut)));
  overflow: hidden;
}

.page-contact .errata-figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .errata-figure .figure__cap {
  margin: 12px 0 14px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
}

/* ---------- 对照与协作 ---------- */

.page-contact .revlog-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-contact .revlog-card,
.page-contact .coop-card {
  position: relative;
  padding: 26px 22px 24px;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - var(--ct-cut)) 0, 100% var(--ct-cut), 100% 100%, var(--ct-cut) 100%, 0 calc(100% - var(--ct-cut)));
  overflow: hidden;
}

.page-contact .revlog-card {
  background: linear-gradient(158deg, rgba(18, 50, 74, 0.92), rgba(7, 14, 31, 0.94));
}

.page-contact .revlog-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(56, 214, 224, 0.12) 70%, transparent);
}

.page-contact .coop-card {
  background: linear-gradient(158deg, rgba(26, 34, 54, 0.94), rgba(7, 14, 31, 0.94));
}

.page-contact .coop-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), rgba(255, 138, 61, 0.14) 72%, transparent);
}

.page-contact .revlog-card__kicker,
.page-contact .coop-card__kicker {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .revlog-card h3,
.page-contact .coop-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .revlog-card > p,
.page-contact .coop-card > p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .revlog-list,
.page-contact .coop-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .revlog-list li,
.page-contact .coop-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .revlog-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .coop-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--accent);
}

.page-contact .coop-list strong {
  color: var(--text);
  font-weight: 700;
}

.page-contact .coop-note {
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
}

/* ---------- 到访 ---------- */

.page-contact .visit-band {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 32px 24px;
  background: linear-gradient(135deg, rgba(18, 50, 74, 0.95), rgba(7, 14, 31, 0.95));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
  overflow: hidden;
}

.page-contact .visit-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 68, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 68, 0.5) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.45;
  pointer-events: none;
}

.page-contact .visit-band__main,
.page-contact .visit-band__side {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-contact .visit-band h2 {
  margin: 10px 0 16px;
  font-size: clamp(21px, 2.9vw, 30px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .visit-address {
  margin: 0 0 16px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .visit-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .visit-rules li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.74;
}

.page-contact .visit-rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--accent-warm);
  background: rgba(255, 138, 61, 0.14);
}

/* ---------- 场景折叠 ---------- */

.page-contact .fold {
  border-top: 1px solid var(--line);
}

.page-contact .fold__item {
  border-bottom: 1px solid var(--line);
}

.page-contact .fold__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-contact .fold__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 12px;
  padding: 18px 6px;
  background: none;
  border: 0;
  color: var(--text);
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.page-contact .fold__trigger:hover {
  color: var(--accent-warm);
}

.page-contact .fold__trigger::after {
  content: "+";
  font-family: var(--mono);
  font-size: 17px;
  color: var(--accent);
  text-align: center;
  line-height: 1;
}

.page-contact .fold__trigger[aria-expanded="true"]::after {
  content: "−";
}

.page-contact .fold__idx {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .fold__text {
  min-width: 0;
}

.page-contact .fold__panel {
  padding: 0 6px 20px 54px;
}

.page-contact .fold__panel p {
  margin: 0;
  max-width: 66ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .section {
    padding: 52px 0;
  }

  .page-contact .channel-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .errata-figure {
    max-width: 560px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 28px;
    align-items: start;
  }

  .page-contact .errata-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .revlog-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 22px;
    align-items: stretch;
  }

  .page-contact .visit-band {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 34px;
    padding: 38px 34px;
  }
}

@media (min-width: 1080px) {
  .page-contact .contact-hero {
    padding-top: 46px;
  }

  .page-contact .channel-list {
    gap: 14px;
  }

  .page-contact .errata-item {
    padding-right: 20px;
  }
}

@media (max-width: 399px) {
  .page-contact .channel-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-contact .fold__trigger {
    grid-template-columns: 34px minmax(0, 1fr) 20px;
    gap: 9px;
    font-size: 15px;
  }

  .page-contact .fold__panel {
    padding-left: 43px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-item,
  .page-contact .errata-item,
  .page-contact .fold__trigger {
    transition: none;
  }

  .page-contact .channel-item:hover {
    transform: none;
  }
}