.page-contact {
  --pc-gap: clamp(16px, 2.4vw, 28px);
  --pc-pad: clamp(22px, 3.6vw, 42px);
}

/* ---------- 通用标题 ---------- */
.page-contact .pc-h2 {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-ink);
  margin: 10px 0 14px;
}

.page-contact .pc-h2--dark {
  color: var(--on-dark);
}

.page-contact .pc-intro {
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--index-gray);
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-contact .pc-intro--dark {
  color: var(--on-dark-dim);
}

.page-contact .pc-figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

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

.page-contact .pc-figure--dark {
  border-color: var(--rule-on-dark);
}

/* ---------- 首屏框景 ---------- */
.page-contact .pc-hero {
  background: var(--mist);
  padding: clamp(20px, 3vw, 40px) 0 clamp(48px, 6vw, 88px);
}

.page-contact .pc-hero__frame {
  border-color: var(--rule);
}

.page-contact .pc-hero__box {
  padding: var(--pc-pad);
}

.page-contact .pc-hero__title {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(32px, 6.4vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text-ink);
  margin: 14px 0 20px;
  max-width: 16ch;
}

.page-contact .pc-hero__lede {
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-ink);
  margin: 0 0 26px;
}

.page-contact .pc-hero__points {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  border-top: 1px solid var(--rule);
}

.page-contact .pc-hero__points li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--index-gray);
}

.page-contact .pc-hero__points li::before {
  content: "—";
  margin-right: 8px;
  color: var(--gold);
}

/* ---------- 通道卡片 ---------- */
.page-contact .pc-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .pc-channel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: var(--pc-pad);
  transition: border-color 160ms ease;
}

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  border-color: var(--gold);
}

.page-contact .pc-channel--lead {
  border-width: 2px;
  border-color: var(--gold);
}

.page-contact .pc-channel__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--index-gray);
}

.page-contact .pc-channel--lead .pc-channel__num {
  color: var(--gold);
}

.page-contact .pc-channel__name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 0;
}

.page-contact .pc-channel__desc {
  font-size: 15px;
  line-height: 1.78;
  color: var(--index-gray);
  margin: 0;
}

.page-contact .pc-channel__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
  align-self: flex-start;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-contact .pc-channel__link:hover,
.page-contact .pc-channel__link:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

.page-contact .pc-channel__note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--index-gray);
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
}

.page-contact .pc-channel .copy-chip {
  width: 100%;
  justify-content: space-between;
}

/* ---------- 处理流程 ---------- */
.page-contact .pc-flow {
  background: var(--ink-blue);
  color: var(--on-dark);
}

.page-contact .pc-flow .section-label {
  color: var(--gold-light);
}

.page-contact .pc-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .pc-flow__step {
  border-top: 2px solid var(--rule-on-dark);
  padding-top: 18px;
  transition: border-color 160ms ease;
}

.page-contact .pc-flow__step:hover {
  border-top-color: var(--gold);
}

.page-contact .pc-flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-light);
  margin-bottom: 12px;
}

.page-contact .pc-flow__name {
  font-size: 19px;
  font-weight: 700;
  color: var(--on-dark);
  margin: 0 0 10px;
}

.page-contact .pc-flow__desc {
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-dark-dim);
  margin: 0 0 12px;
}

.page-contact .pc-flow__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--gold-light);
  margin: 0;
}

/* ---------- 反馈类型 ---------- */
.page-contact .pc-types {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .pc-type {
  background: var(--paper);
  border: 1px solid var(--rule);
  transition: border-color 160ms ease;
}

.page-contact .pc-type:hover,
.page-contact .pc-type[open] {
  border-color: var(--gold);
}

.page-contact .pc-type__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-type__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-contact .pc-type__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-ink);
}

.page-contact .pc-type__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--index-gray);
}

.page-contact .pc-type[open] .pc-type__hint {
  color: var(--gold);
}

.page-contact .pc-type__body {
  padding: 0 20px 22px;
}

.page-contact .pc-type__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--index-gray);
  margin: 0 0 12px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

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

.page-contact .pc-type__list li {
  padding-left: 16px;
  border-left: 2px solid var(--rule);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-ink);
}

/* ---------- 合作洽谈 ---------- */
.page-contact .pc-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .pc-coop__head {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--index-gray);
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--rule);
}

.page-contact .pc-coop__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .pc-coop__list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.page-contact .pc-coop__idx {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  border: 1px solid var(--rule);
}

.page-contact .pc-coop__list strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-ink);
  margin-bottom: 6px;
}

.page-contact .pc-coop__list p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--index-gray);
  margin: 0;
}

.page-contact .pc-coop__list--plain li {
  display: block;
  padding-left: 16px;
  border-left: 2px solid var(--rule);
  font-size: 14px;
  line-height: 1.75;
  color: var(--index-gray);
}

.page-contact .pc-coop__prep {
  margin-top: 28px;
  padding: 20px;
  background: var(--mist);
  border: 1px solid var(--rule);
}

.page-contact .pc-coop__prep-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--index-gray);
  margin: 0 0 14px;
}

.page-contact .pc-coop__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .pc-coop__links li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--index-gray);
}

.page-contact .pc-coop__links a {
  color: var(--text-ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 160ms ease;
}

.page-contact .pc-coop__links a:hover,
.page-contact .pc-coop__links a:focus-visible {
  color: var(--gold);
}

/* ---------- 常见反馈 ---------- */
.page-contact .pc-faq__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .pc-faq__item {
  background: var(--paper);
  border-left: 3px solid var(--gold);
  padding: 18px 22px;
  transition: border-color 160ms ease;
}

.page-contact .pc-faq__item:hover {
  border-left-color: var(--cinnabar);
}

.page-contact .pc-faq__q {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-ink);
  margin: 0 0 8px;
}

.page-contact .pc-faq__a {
  font-size: 14px;
  line-height: 1.78;
  color: var(--index-gray);
  margin: 0;
}

.page-contact .pc-faq__tip {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-ink);
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.page-contact .pc-faq__tip a {
  color: var(--text-ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 160ms ease;
}

.page-contact .pc-faq__tip a:hover,
.page-contact .pc-faq__tip a:focus-visible {
  color: var(--gold);
}

/* ---------- 办公联系信息 ---------- */
.page-contact .pc-contact {
  background: var(--ink-blue);
  color: var(--on-dark);
}

.page-contact .pc-contact .section-label {
  color: var(--gold-light);
}

.page-contact .pc-contact__table {
  border: 1px solid var(--rule-on-dark);
}

.page-contact .pc-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--rule-on-dark-soft);
}

.page-contact .pc-contact__row:last-child {
  border-bottom: 0;
}

.page-contact .pc-contact__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-light);
}

.page-contact .pc-contact__val {
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-dark);
  word-break: break-word;
}

.page-contact .pc-contact__note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--on-dark-dim);
}

.page-contact .pc-contact__note a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-on-dark);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-contact .pc-contact__note a:hover,
.page-contact .pc-contact__note a:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-contact__row {
    grid-template-columns: 150px 1fr;
    gap: 24px;
    align-items: baseline;
  }

  .page-contact .pc-faq__item {
    padding: 22px 28px;
  }
}

@media (min-width: 780px) {
  .page-contact .pc-flow__steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .pc-types {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 880px) {
  .page-contact .pc-channels__grid {
    grid-template-columns: 1.45fr 1fr 1fr;
  }

  .page-contact .pc-coop__grid {
    grid-template-columns: 1.1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .page-contact .pc-hero__box {
    padding: clamp(40px, 4vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-channel,
  .page-contact .pc-channel__link,
  .page-contact .pc-flow__step,
  .page-contact .pc-type,
  .page-contact .pc-faq__item,
  .page-contact .pc-coop__links a,
  .page-contact .pc-contact__note a,
  .page-contact .pc-faq__tip a {
    transition: none;
  }
}