.page-contact {
  --contact-rhythm: clamp(56px, 9vw, 112px);
  --contact-gap: clamp(20px, 3vw, 34px);
  color: var(--sk-ink);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-family: var(--sk-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--sk-faint);
}

.page-contact .contact-crumb a {
  color: var(--sk-muted);
}

.page-contact .contact-crumb [aria-current="page"] {
  color: var(--sk-gold);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(26px, 5vw, 48px);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.5vw, 66px);
  line-height: 1.04;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--sk-ink);
}

.page-contact .contact-hero__brand {
  color: var(--sk-gold);
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: var(--sk-muted);
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-contact .contact-hero__media {
  margin: 0;
}

/* ---------- 区块骨架 ---------- */
.page-contact .contact-block {
  margin-top: var(--contact-rhythm);
}

.page-contact .contact-head {
  max-width: 68ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-contact .contact-head__num {
  display: inline-block;
  margin-right: 10px;
  color: var(--sk-gold);
  letter-spacing: .08em;
}

.page-contact .contact-head h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--sk-ink);
}

.page-contact .contact-head__lede {
  margin: 16px 0 0;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--sk-muted);
}

/* ---------- 三张联系卡 ---------- */
.page-contact .contact-cards {
  display: grid;
  gap: 16px;
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(22px, 3vw, 32px);
  background: linear-gradient(180deg, var(--sk-panel) 0%, var(--sk-deep-mid) 100%);
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  transition: border-color var(--sk-ease), background var(--sk-ease), box-shadow var(--sk-ease);
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--sk-gold);
  background: linear-gradient(180deg, var(--sk-hover) 0%, var(--sk-panel) 100%);
  box-shadow: 0 14px 36px rgba(0, 0, 0, .38);
}

.page-contact .contact-card:focus {
  outline: none;
}

.page-contact .contact-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--sk-line);
}

.page-contact .contact-card__icon {
  width: 26px;
  height: 26px;
  color: var(--sk-cyan);
  transition: color var(--sk-ease);
}

.page-contact .contact-card:hover .contact-card__icon,
.page-contact .contact-card:focus-within .contact-card__icon {
  color: var(--sk-gold);
}

.page-contact .contact-card__num {
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--sk-faint);
}

.page-contact .contact-card__title {
  margin: 0;
  font-size: clamp(18px, 2.6vw, 21px);
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--sk-ink);
}

.page-contact .contact-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sk-muted);
}

.page-contact .contact-card__foot {
  margin-top: auto;
  padding-top: 4px;
}

.page-contact .contact-card__label {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--sk-cyan);
}

.page-contact .contact-card__value {
  margin: 0;
  padding: 10px 12px;
  font-family: var(--sk-mono);
  font-size: clamp(13px, 2.4vw, 15px);
  letter-spacing: .02em;
  color: var(--sk-ink);
  word-break: break-all;
  background: rgba(4, 10, 23, .6);
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .contact-card__hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sk-faint);
}

/* ---------- 勘误流程 ---------- */
.page-contact .contact-check__grid {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
  align-items: start;
}

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

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

.page-contact .check-step__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--sk-ease);
}

.page-contact .check-step__summary::-webkit-details-marker {
  display: none;
}

.page-contact .check-step__summary:hover .check-step__title {
  color: var(--sk-gold);
}

.page-contact .check-step__index {
  flex: none;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--sk-cyan);
}

.page-contact .check-step__title {
  flex: 1 1 auto;
  font-size: clamp(15px, 2vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--sk-ink);
  transition: color var(--sk-ease);
}

.page-contact .check-step__chev {
  flex: none;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  color: var(--sk-faint);
}

.page-contact .check-step__chev::before {
  content: "+";
  font-family: var(--sk-mono);
  font-size: 13px;
  line-height: 1;
}

.page-contact .check-step[open] .check-step__chev::before {
  content: "\2013";
}

.page-contact .check-step[open] .check-step__chev {
  border-color: var(--sk-gold);
  color: var(--sk-gold);
}

.page-contact .check-step__panel {
  padding: 0 0 clamp(18px, 2.6vw, 24px) 34px;
}

.page-contact .check-step__panel p {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sk-muted);
}

.page-contact .contact-check__media {
  margin: 0;
}

/* ---------- 内容协作 ---------- */
.page-contact .contact-collab__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-contact .contact-collab__lede {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--sk-muted);
}

.page-contact .collab-list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sk-line);
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  overflow: hidden;
}

.page-contact .collab-list li {
  padding: clamp(18px, 2.6vw, 24px);
  background: var(--sk-deep-mid);
}

.page-contact .collab-list h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--sk-gold);
}

.page-contact .collab-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sk-muted);
}

.page-contact .contact-collab__side {
  padding: clamp(22px, 3vw, 30px);
  background: linear-gradient(180deg, var(--sk-panel) 0%, var(--sk-deep) 100%);
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
}

.page-contact .collab-side__label {
  margin: 0 0 20px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--sk-cyan);
}

.page-contact .collab-side__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--sk-line);
}

.page-contact .collab-side__num {
  margin: 0;
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--sk-ink);
}

.page-contact .collab-side__item:last-of-type .collab-side__num {
  color: var(--sk-orange);
}

.page-contact .collab-side__unit {
  margin: 0;
  font-size: 14px;
  color: var(--sk-muted);
}

.page-contact .collab-side__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--sk-line);
  font-size: 13px;
  line-height: 1.8;
  color: var(--sk-faint);
}

/* ---------- 办公信息 ---------- */
.page-contact .office-grid {
  display: grid;
  gap: 16px;
}

.page-contact .office-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 3vw, 30px);
  background: var(--sk-panel);
  border: 1px solid var(--sk-line);
  border-left: 2px solid var(--sk-line);
  border-radius: var(--sk-radius);
  transition: border-color var(--sk-ease);
}

.page-contact .office-block:hover {
  border-left-color: var(--sk-cyan);
}

.page-contact .office-block--address {
  border-left-color: var(--sk-gold);
}

.page-contact .office-block__icon {
  width: 24px;
  height: 24px;
  color: var(--sk-cyan);
}

.page-contact .office-block--address .office-block__icon {
  color: var(--sk-gold);
}

.page-contact .office-block__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  font-weight: 600;
  color: var(--sk-faint);
}

.page-contact .office-block__value {
  margin: 0;
  font-size: clamp(14.5px, 1.9vw, 16px);
  line-height: 1.75;
  color: var(--sk-ink);
}

.page-contact .office-block__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sk-faint);
}

/* ---------- 处理顺序 ---------- */
.page-contact .reply-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-contact .reply-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: clamp(24px, 3.4vw, 34px);
}

.page-contact .reply-track__item:last-child {
  padding-bottom: 0;
}

.page-contact .reply-track__item::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--sk-line), rgba(20, 35, 57, 0));
}

.page-contact .reply-track__item:last-child::before {
  display: none;
}

.page-contact .reply-track__node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 26px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sk-deep);
  background: var(--sk-cyan);
  border-radius: var(--sk-radius);
}

.page-contact .reply-track__body h3 {
  margin: 1px 0 8px;
  font-size: clamp(15.5px, 2vw, 17.5px);
  font-weight: 700;
  color: var(--sk-ink);
}

.page-contact .reply-track__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sk-muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .office-block--address {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-contact .contact-check__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-contact .contact-collab__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  }

  .page-contact .contact-collab__side {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1080px) {
  .page-contact .office-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, .8fr);
  }

  .page-contact .office-block--address {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .contact-card__icon,
  .page-contact .check-step__title,
  .page-contact .office-block {
    transition: none;
  }
}
<<<END>>>