.page-contact {
  --pc-h1: clamp(1.9rem, 5.4vw, 4.3rem);
  --pc-h2: clamp(1.45rem, 3.1vw, 2.2rem);
  --pc-gap: clamp(28px, 5vw, 64px);
  --pc-pad-y: clamp(40px, 6vw, 80px);
  background-color: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-contact .crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  padding: clamp(28px, 5vw, 56px) 0 clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-size: var(--pc-h1);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 20ch;
}

.page-contact .pc-lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: var(--step-3);
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .pc-lead--tight {
  font-size: var(--step-2);
  color: var(--muted);
  margin-top: 16px;
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-contact .pc-hero__media {
  margin: 0;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  background-color: var(--ink-2);
}

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

.page-contact .pc-hero__media .plate {
  margin: 12px 0 0;
}

/* ---------- 区块通用 ---------- */
.page-contact .pc-section {
  padding: var(--pc-pad-y) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-section__head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
  margin-bottom: clamp(24px, 3.5vw, 44px);
}

.page-contact .pc-section__head h2,
.page-contact .pc-flow h2,
.page-contact .pc-contact-aside h2,
.page-contact .pc-fix__text h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--pc-h2);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .pc-note {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .pc-fine {
  margin: 18px 0 0;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--muted);
  max-width: 52ch;
}

/* ---------- 三条通道 ---------- */
.page-contact .pc-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
}

.page-contact .pc-channel {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 32px);
  background-color: var(--ink-2);
  border-left: 3px solid var(--line);
  transition: border-color 260ms var(--ease), transform 260ms var(--ease);
}

.page-contact .pc-channel--mail {
  border-left-color: var(--score);
}

.page-contact .pc-channel--phone {
  border-left-color: var(--pitch);
}

.page-contact .pc-channel--feed {
  border-left-color: var(--lake);
}

.page-contact .pc-channel:hover {
  transform: translateY(-2px);
}

.page-contact .pc-channel__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .pc-channel__title {
  margin: 0;
  font-size: var(--step-4);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .pc-channel__desc {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联系方式 + 流程 ---------- */
.page-contact .pc-contact-grid {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .pc-contact-aside h2,
.page-contact .pc-flow h2 {
  margin: 12px 0 clamp(20px, 3vw, 32px);
}

.page-contact .pc-info {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-info dt {
  padding-top: 18px;
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .pc-info dd {
  margin: 8px 0 0;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  font-size: var(--step-3);
  line-height: 1.6;
  color: var(--paper);
}

.page-contact .pc-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.05rem, 4.2vw, 1.6rem);
  letter-spacing: -0.01em;
  color: var(--score);
  overflow-wrap: anywhere;
}

.page-contact .pc-info__plain {
  font-size: var(--step-3);
  color: var(--paper);
}

.page-contact .pc-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pc-step;
}

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

.page-contact .pc-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-step summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-contact .pc-step summary:hover .pc-step__title {
  color: var(--lake);
}

.page-contact .pc-step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-2);
  color: var(--score);
}

.page-contact .pc-step__title {
  font-size: var(--step-3);
  color: var(--paper);
  transition: color 200ms var(--ease);
}

.page-contact .pc-step__mark {
  position: relative;
  width: 16px;
  height: 16px;
  align-self: center;
}

.page-contact .pc-step__mark::before,
.page-contact .pc-step__mark::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 7px;
  width: 10px;
  height: 1px;
  background-color: var(--lake);
}

.page-contact .pc-step__mark::after {
  transform: rotate(90deg);
  transition: transform 240ms var(--ease);
}

.page-contact .pc-step details[open] .pc-step__mark::after {
  transform: rotate(0deg);
}

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

.page-contact .pc-step__body p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--step-2);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 数据纠错要点 ---------- */
.page-contact .pc-fix__grid {
  display: grid;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .pc-checklist {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
}

.page-contact .pc-checklist li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 15px 18px;
  background-color: var(--ink-2);
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--paper);
}

.page-contact .pc-checklist__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  color: var(--lake);
}

.page-contact .pc-checklist__text strong {
  font-weight: 700;
  color: var(--alert);
}

.page-contact .pc-fix__media {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--ink-2);
}

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

.page-contact .pc-fix__media .plate {
  margin: 12px 0 0;
}

/* ---------- 选题与合作 ---------- */
.page-contact .pc-collab-grid {
  display: grid;
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
}

.page-contact .pc-collab-item {
  padding: clamp(20px, 3vw, 30px);
  background-color: var(--ink);
  transition: background-color 240ms var(--ease);
}

.page-contact .pc-collab-item:hover {
  background-color: var(--ink-2);
}

.page-contact .pc-collab-item__no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--step-2);
  color: var(--pitch);
  margin-bottom: 12px;
}

.page-contact .pc-collab-item__title {
  margin: 0 0 10px;
  font-size: var(--step-4);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .pc-collab-item p {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 先看看这里 ---------- */
.page-contact .pc-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-next-list li {
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-next-list a {
  display: block;
  padding: 18px 0;
  text-decoration: none;
  transition: transform 240ms var(--ease);
}

.page-contact .pc-next-list a:hover,
.page-contact .pc-next-list a:focus-visible {
  transform: translateY(-2px);
}

.page-contact .pc-next__title {
  display: block;
  font-size: var(--step-3);
  color: var(--paper);
  transition: color 200ms var(--ease);
}

.page-contact .pc-next-list a:hover .pc-next__title,
.page-contact .pc-next-list a:focus-visible .pc-next__title {
  color: var(--lake);
}

.page-contact .pc-next__desc {
  display: block;
  margin-top: 6px;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 页尾色带 ---------- */
.page-contact .pc-endband {
  height: 6px;
  margin-top: clamp(40px, 7vw, 88px);
  background: linear-gradient(90deg, var(--lake) 0%, var(--pitch) 34%, var(--pitch-deep) 62%, rgba(14, 122, 82, 0) 100%);
}

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

  .page-contact .pc-collab-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
  }
}

@media (min-width: 960px) {
  .page-contact .pc-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-contact .pc-hero__media {
    aspect-ratio: 4 / 5;
  }

  .page-contact .pc-contact-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }

  .page-contact .pc-fix__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (min-width: 1280px) {
  .page-contact .pc-fix__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 5fr);
    gap: clamp(48px, 6vw, 88px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-contact .pc-channel:hover,
  .page-contact .pc-next-list a:hover,
  .page-contact .pc-next-list a:focus-visible {
    transform: none;
  }
}