.page-contact {
  --pc-line: var(--hair);
}

.page-contact .section {
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
}

.page-contact .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}

.page-contact .breadcrumb {
  padding-top: 1.25rem;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  display: grid;
  gap: 1.75rem;
  padding-top: 1.5rem;
  align-items: start;
}

.page-contact .pc-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
  font-size: clamp(1.85rem, 5.4vw, 3.3rem);
  color: var(--paper);
  margin: 0.6rem 0 0;
  max-width: 20ch;
}

.page-contact .pc-hero-copy h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 1.1rem;
  background: linear-gradient(90deg, var(--coral), var(--amber));
}

.page-contact .pc-hero-copy .lede {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-hero-points {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 52ch;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-hero-points li {
  display: grid;
  grid-template-columns: 1rem minmax(0, 1fr);
  gap: 0.7rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--pc-line);
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--paper);
  opacity: 0.86;
}

.page-contact .pc-hero-points li::before {
  content: "▸";
  color: var(--cyan);
  font-size: var(--fs-12);
  line-height: 1.9;
}

.page-contact .pc-hero-media {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
}

.page-contact .pc-hero-media::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), transparent 72%);
}

.page-contact .pc-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.82);
}

.page-contact .pc-hero-media figcaption {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--pc-line);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--mist);
  line-height: 1.6;
}

/* ---------- 区块标题 ---------- */
.page-contact .pc-section-head {
  max-width: 62ch;
  margin-bottom: 1.6rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.4vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0.45rem 0 0.7rem;
}

.page-contact .pc-section-head .lede {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 联络板 ---------- */
.page-contact .pc-board-grid {
  display: grid;
  gap: 1rem;
}

.page-contact .pc-channels {
  display: grid;
  gap: 1rem;
  align-content: start;
  min-width: 0;
}

.page-contact .pc-channel {
  --ch: var(--coral);
  position: relative;
  padding: 1.15rem 1.05rem 1rem;
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
  border-left: 3px solid var(--ch);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-contact .pc-channel--coral { --ch: var(--coral); }
.page-contact .pc-channel--cyan { --ch: var(--cyan); }
.page-contact .pc-channel--steel { --ch: var(--steel); }

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  transform: translateY(-2px);
  border-color: var(--ch);
  box-shadow: 0 12px 26px rgba(3, 12, 22, 0.55);
}

.page-contact .pc-channel-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.7rem;
}

.page-contact .pc-channel-index {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--ch);
}

.page-contact .pc-channel-title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-channel-value {
  margin: 0.8rem 0 0.55rem;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.6vw, 1.125rem);
  line-height: 1.45;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .pc-channel-value a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--ch);
  padding-bottom: 2px;
  transition: color var(--ease), border-color var(--ease);
}

.page-contact .pc-channel-value a:hover,
.page-contact .pc-channel-value a:focus-visible {
  color: var(--ch);
  border-color: var(--ch);
}

.page-contact .pc-channel-desc {
  margin: 0 0 0.95rem;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--paper);
  opacity: 0.84;
}

.page-contact .pc-channel-tags {
  list-style: none;
  margin: 0;
  padding: 0.75rem 0 0;
  border-top: 1px solid var(--pc-line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--mist);
  opacity: 0.55;
  transition: opacity var(--ease);
}

.page-contact .pc-channel:hover .pc-channel-tags,
.page-contact .pc-channel:focus-within .pc-channel-tags {
  opacity: 1;
}

.page-contact .pc-channel-tags li::before {
  content: "/";
  color: var(--ch);
  margin-right: 0.35rem;
}

/* ---------- 地址与备案 ---------- */
.page-contact .pc-address {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--pc-line);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(107, 134, 166, 0.24), transparent 62%),
    var(--ink-800);
}

.page-contact .pc-address-visual {
  position: relative;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-address-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: grayscale(1) contrast(1.08) brightness(0.7);
  opacity: 0.6;
}

.page-contact .pc-address-visual::after {
  content: "↑ N";
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.15rem 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: rgba(7, 26, 43, 0.75);
  border: 1px solid var(--pc-line);
}

.page-contact .pc-address-body {
  padding: 1.15rem 1.05rem 1.35rem;
}

.page-contact .pc-address-body h3 {
  margin: 0.35rem 0 0.85rem;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  color: var(--paper);
}

.page-contact .pc-address-line {
  margin: 0 0 0.8rem;
  padding-left: 0.8rem;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--cyan);
}

.page-contact .pc-address-note {
  margin: 0 0 1.2rem;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .pc-registry {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--pc-line);
  display: grid;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
}

.page-contact .pc-registry-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
}

.page-contact .pc-registry dt {
  color: var(--steel);
  letter-spacing: 0.06em;
}

.page-contact .pc-registry dd {
  margin: 0;
  color: var(--mist);
  text-align: right;
  word-break: break-all;
}

/* ---------- 数据疑义 ---------- */
.page-contact .pc-issue-grid {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

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

.page-contact .pc-step {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.25rem 1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-step-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  line-height: 1;
  color: var(--coral);
  letter-spacing: 0.02em;
}

.page-contact .pc-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-step p {
  margin: 0.3rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .pc-template {
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
  border-top: 3px solid var(--amber);
}

.page-contact .pc-disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--paper);
}

.page-contact .pc-disclosure summary::-webkit-details-marker {
  display: none;
}

.page-contact .pc-disclosure summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  line-height: 1;
  color: var(--amber);
}

.page-contact .pc-disclosure[open] summary::after {
  content: "−";
}

.page-contact .pc-disclosure summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .pc-template-body {
  padding: 0 1.05rem 1.15rem;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-template-body pre {
  margin: 1rem 0 0.85rem;
  padding: 0.95rem;
  background: rgba(7, 26, 43, 0.85);
  border: 1px solid var(--pc-line);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.85;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-contact .pc-template-note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .pc-template-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  transition: border-color var(--ease);
}

.page-contact .pc-template-note a:hover,
.page-contact .pc-template-note a:focus-visible {
  border-color: var(--cyan);
}

/* ---------- 栏目合作 ---------- */
.page-contact .pc-coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-contact .pc-coop-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 1.15rem 1.05rem 1.2rem;
  border: 1px solid var(--pc-line);
  background: var(--ink-800);
  transition: transform var(--ease), border-color var(--ease);
}

.page-contact .pc-coop-card:hover,
.page-contact .pc-coop-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--coral);
}

.page-contact .pc-coop-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .pc-coop-card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
  flex: 1 1 auto;
}

/* ---------- 回复时效横条 ---------- */
.page-contact .pc-response {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  padding: clamp(1.4rem, 4vw, 2.25rem);
  display: grid;
  gap: 1.5rem;
  border: 1px solid var(--pc-line);
  border-top: 3px solid var(--coral);
  background:
    linear-gradient(100deg, rgba(255, 107, 74, 0.12), transparent 55%),
    var(--ink-800);
}

.page-contact .pc-response h2 {
  margin: 0.45rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.2vw, 1.75rem);
  line-height: 1.3;
  color: var(--paper);
  max-width: 24ch;
}

.page-contact .pc-response-text {
  margin: 0 0 1.1rem;
  max-width: 56ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-response-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-response-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.35rem 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-response-key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-contact .pc-response-val {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--amber);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .pc-issue-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 1.75rem;
  }
}

@media (min-width: 960px) {
  .page-contact .pc-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 2.5rem;
  }

  .page-contact .pc-board-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 1.5rem;
    align-items: stretch;
  }

  .page-contact .pc-channel {
    padding: 1.3rem 1.25rem 1.15rem;
  }
}

@media (min-width: 1100px) {
  .page-contact .pc-response {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: center;
    gap: 2.5rem;
  }
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-contact .pc-hero-copy h1 {
    max-width: none;
  }

  .page-contact .pc-step-num {
    font-size: var(--fs-18);
  }

  .page-contact .pc-address-line {
    font-size: var(--fs-14);
  }
}