.page-contact {
  --pc-panel: var(--ink-800);
  --pc-ink: var(--ink-900);
}

.page-contact :focus-visible {
  outline: 2px solid var(--flag-blue);
  outline-offset: 2px;
}

.page-contact .yt-breadcrumb {
  margin-bottom: clamp(1rem, 3vw, 2rem);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.page-contact .pc-hero__lede h1 {
  margin: 0.5rem 0 1rem;
  max-width: 22ch;
}

.page-contact .pc-hero__lede .yt-lede {
  max-width: 48ch;
}

.page-contact .pc-hero__meta {
  display: grid;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  overflow: hidden;
}

.page-contact .pc-meta__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .pc-meta__key {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.page-contact .pc-meta__val {
  font-family: var(--font-data);
  font-size: 0.9375rem;
  color: var(--text-1);
  overflow-wrap: anywhere;
}

.page-contact .pc-banner {
  margin-top: clamp(1.75rem, 4vw, 3rem);
}

/* ---------- 左右桌面 ---------- */
.page-contact .pc-desk-wrap {
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.page-contact .pc-desk {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  min-width: 0;
}

.page-contact .pc-desk__main {
  min-width: 0;
}

.page-contact .pc-block + .pc-block {
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
}

.page-contact .pc-block > .yt-section__head {
  margin-bottom: clamp(1.1rem, 2.5vw, 1.75rem);
}

.page-contact .pc-block .yt-prose {
  max-width: 46ch;
}

/* ---------- 渠道卡片 ---------- */
.page-contact .pc-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
}

.page-contact .pc-channel {
  display: grid;
  gap: 0.55rem;
  padding: 1.1rem 1.15rem 1.25rem;
  align-content: start;
  min-width: 0;
}

.page-contact .pc-channel__head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
}

.page-contact .pc-channel__head h3 {
  margin: 0;
}

.page-contact .pc-channel__value {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  letter-spacing: -0.01em;
  color: var(--flag-blue);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel__value--text {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-1);
}

.page-contact .pc-channel__desc {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---------- 材料清单：标签页 + 配图 ---------- */
.page-contact .pc-tabs-layout {
  display: grid;
  gap: var(--gap);
  min-width: 0;
}

.page-contact .pc-tabs {
  min-width: 0;
}

.page-contact .pc-tabs .yt-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.page-contact .pc-tab {
  flex: 0 0 auto;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  color: var(--text-2);
  cursor: pointer;
  transition: background 150ms var(--ease), color 150ms var(--ease), border-color 150ms var(--ease);
}

.page-contact .pc-tab:hover {
  background: var(--glass-strong);
  color: var(--text-1);
}

.page-contact .pc-tab.is-active,
.page-contact .pc-tab[aria-selected="true"] {
  background: var(--flag-blue);
  border-color: var(--flag-blue);
  color: var(--ink-900);
}

.page-contact .pc-tabpanel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
  padding: 1.1rem 1.15rem 1.25rem;
}

.page-contact .pc-tabpanel h3 {
  margin: 0 0 0.85rem;
}

.page-contact .pc-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-contact .pc-checklist li {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr);
  gap: 0.55rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-contact .pc-checklist li::before {
  content: "";
  display: block;
  width: 0.4rem;
  height: 0.4rem;
  margin-top: 0.62rem;
  background: var(--flag-blue);
}

.page-contact .pc-tabpanel__tip {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  color: var(--text-2);
  font-size: 0.875rem;
  line-height: 1.75;
}

.page-contact .pc-shot {
  margin: 0;
}

/* ---------- 时效时间轴 ---------- */
.page-contact .pc-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-contact .pc-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 0 0 1.6rem 0;
}

.page-contact .pc-timeline__item::before {
  content: "";
  position: absolute;
  left: 0.94rem;
  top: 1.6rem;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-contact .pc-timeline__item:last-child {
  padding-bottom: 0;
}

.page-contact .pc-timeline__item:last-child::before {
  display: none;
}

.page-contact .pc-timeline__num {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  line-height: 2rem;
  text-align: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--ink-700);
  color: var(--flag-blue);
  font-size: 0.8125rem;
}

.page-contact .pc-timeline__body h3 {
  margin: 0.2rem 0 0.45rem;
}

.page-contact .pc-timeline__body p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---------- 合作与纠错 ---------- */
.page-contact .pc-partner {
  display: grid;
  gap: var(--gap);
}

.page-contact .pc-partner__card {
  display: grid;
  gap: 0.65rem;
  align-content: start;
  padding: 1.15rem 1.2rem 1.3rem;
}

.page-contact .pc-partner__card .yt-tag {
  justify-self: start;
}

.page-contact .pc-partner__card h3 {
  margin: 0;
}

.page-contact .pc-partner__card p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-contact .pc-partner__ask {
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
}

/* ---------- 右侧粘性指引 ---------- */
.page-contact .pc-desk__side {
  min-width: 0;
}

.page-contact .pc-guide {
  display: grid;
  gap: 0.9rem;
  padding: 1.2rem 1.25rem 1.35rem;
}

.page-contact .pc-guide__title {
  margin: 0;
  font-size: 1.25rem;
}

.page-contact .pc-guide__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-contact .pc-guide__steps li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
}

.page-contact .pc-guide__steps p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-contact .pc-guide__num {
  color: var(--flag-blue);
  font-size: 0.8125rem;
  line-height: 1.75;
}

.page-contact .pc-index {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}

.page-contact .pc-guide__foot {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-contact .pc-guide__foot a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 底部通栏信息 ---------- */
.page-contact .pc-info {
  position: relative;
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-contact .pc-info::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--flag-blue) 0 20%,
    var(--flag-white) 20% 40%,
    var(--flag-red) 40% 60%,
    var(--flag-green) 60% 80%,
    var(--flag-yellow) 80% 100%
  );
}

.page-contact .pc-info__inner {
  padding-block: clamp(2rem, 5vw, 3.25rem);
}

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

.page-contact .pc-info__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-info__row dt {
  color: var(--text-2);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

.page-contact .pc-info__row dd {
  margin: 0;
  color: var(--text-1);
  font-family: var(--font-data);
  font-size: 0.9375rem;
  overflow-wrap: anywhere;
}

.page-contact .pc-info__note {
  margin: 1.4rem 0 0;
  max-width: 62ch;
  color: var(--text-2);
  font-size: 0.875rem;
  line-height: 1.85;
}

.page-contact .pc-info__note a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 640px 以上 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .pc-channel--wide {
    grid-column: 1 / -1;
  }

  .page-contact .pc-partner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 900px 以上 ---------- */
@media (min-width: 900px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-contact .pc-tabs-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 960px 以上：左右分栏固定 ---------- */
@media (min-width: 960px) {
  .page-contact .pc-desk {
    grid-template-columns: minmax(0, 7.5fr) minmax(0, 4fr);
  }

  .page-contact .pc-desk__side {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 2.5rem);
    overflow-y: auto;
    scrollbar-width: thin;
  }

  .page-contact .pc-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-tab {
    transition: none;
  }

  .page-contact .pc-desk__side {
    position: static;
    max-height: none;
    overflow: visible;
  }
}
<<<END>>>