.page-contact {
  --pc-line: var(--silver);
  --pc-block: clamp(48px, 7vw, 96px);
  --pc-sub: clamp(22px, 2.6vw, 34px);
  background: var(--warm);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-contact .pc-crumb {
  padding-top: clamp(84px, 11vw, 124px);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
  margin-top: clamp(16px, 2.6vw, 30px);
}

.page-contact .pc-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(36px, 6.6vw, 88px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 16px 0 0;
  text-wrap: balance;
}

.page-contact .pc-lead {
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.9;
  color: var(--graphite);
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 30em;
}

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

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

.page-contact .pc-figure .figure-cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--graphite);
}

@media (min-width: 940px) {
  .page-contact .pc-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 三张错位档案卡 ---------- */
.page-contact .pc-archive {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: var(--pc-block);
}

.page-contact .pc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(22px, 2.3vw, 30px);
  background: var(--paper);
  border: 1px solid var(--pc-line);
}

.page-contact .pc-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--red);
}

.page-contact .pc-card[data-rank="1"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--warm);
}

.page-contact .pc-card[data-rank="1"]::before {
  background: var(--cyan);
  width: 44px;
}

.page-contact .pc-card-label {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-contact .pc-card[data-rank="1"] .pc-card-label {
  color: var(--cyan);
}

.page-contact .pc-card-key {
  margin: 2px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.15;
}

.page-contact .pc-card-value {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.5vw, 19px);
  line-height: 1.5;
  overflow-wrap: anywhere;
  color: var(--ink);
}

.page-contact .pc-card-value--plain {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.6;
}

.page-contact .pc-card[data-rank="1"] .pc-card-value {
  color: var(--paper);
}

.page-contact .pc-card-note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .pc-card[data-rank="1"] .pc-card-note {
  color: #D8D4CE;
}

.page-contact .pc-card .tag {
  align-self: flex-start;
  margin-top: 6px;
}

@media (min-width: 880px) {
  .page-contact .pc-archive {
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(14px, 1.5vw, 22px);
    align-items: start;
  }

  .page-contact .pc-card[data-rank="1"] {
    grid-column: 1 / span 5;
  }

  .page-contact .pc-card[data-rank="2"] {
    grid-column: 6 / span 4;
    margin-top: 44px;
  }

  .page-contact .pc-card[data-rank="3"] {
    grid-column: 10 / span 3;
    margin-top: 88px;
  }
}

/* ---------- 响应时段 ---------- */
.page-contact .pc-window {
  margin-top: var(--pc-block);
  border-top: 1px solid var(--pc-line);
  padding-top: clamp(24px, 3vw, 40px);
}

.page-contact .pc-sub-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--pc-sub);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-contact .pc-window-note {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--graphite);
  max-width: 40em;
}

.page-contact .pc-strip {
  display: block;
  width: 100%;
  height: auto;
  margin-top: clamp(22px, 3vw, 36px);
}

.page-contact .pc-sla {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-line);
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .pc-sla li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-sla-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--red-deep);
  min-width: 5.5em;
}

.page-contact .pc-sla-key {
  font-size: 14.5px;
  color: var(--graphite);
}

@media (min-width: 800px) {
  .page-contact .pc-window-head {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(20px, 4vw, 48px);
    align-items: baseline;
  }

  .page-contact .pc-sla {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-sla li {
    flex-direction: column;
    gap: 6px;
    padding: 16px 0 16px;
    border-bottom: 1px solid var(--pc-line);
  }

  .page-contact .pc-sla li + li {
    padding-left: clamp(14px, 2vw, 24px);
    border-left: 1px solid var(--pc-line);
  }
}

/* ---------- 四步路径 + 前置清单 ---------- */
.page-contact .pc-split {
  margin-top: var(--pc-block);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 5vw, 64px);
}

.page-contact .pc-steps {
  list-style: none;
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 30px);
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-step-no {
  align-self: start;
  padding: 4px 8px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: var(--red);
}

.page-contact .pc-step-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.25;
}

.page-contact .pc-step-body {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .pc-steps-foot {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--deep-teal);
  border-left: 3px solid var(--cyan);
  padding-left: 14px;
}

.page-contact .pc-side {
  display: grid;
  align-content: start;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-contact .pc-side-figure {
  border: 1px solid var(--pc-line);
  padding: 8px;
  background: var(--paper);
}

.page-contact .pc-side-figure .figure-cap {
  margin: 10px 2px 2px;
}

.page-contact .pc-checks {
  display: grid;
  gap: 8px;
}

.page-contact .pc-check {
  background: var(--paper);
  border: 1px solid var(--pc-line);
}

.page-contact .pc-check-sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.4;
}

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

.page-contact .pc-check-box {
  flex: none;
  width: 13px;
  height: 13px;
  background: var(--amber);
}

.page-contact .pc-check[open] .pc-check-box {
  background: var(--red);
}

.page-contact .pc-check[open] .pc-check-sum {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-check-hint {
  margin: 0;
  padding: 11px 16px 14px 41px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .pc-checks-foot {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--graphite);
}

@media (min-width: 960px) {
  .page-contact .pc-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 合作与授权 ---------- */
.page-contact .pc-coop {
  margin-top: var(--pc-block);
}

.page-contact .pc-coop-inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(26px, 4vw, 52px);
  background: var(--ink);
  color: var(--warm);
  border-left: 6px solid var(--red);
}

.page-contact .pc-coop-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--pc-sub);
  line-height: 1.15;
  color: var(--paper);
}

.page-contact .pc-coop-body {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: #D8D4CE;
  max-width: 42em;
}

.page-contact .pc-coop-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

@media (min-width: 900px) {
  .page-contact .pc-coop-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: end;
  }

  .page-contact .pc-coop-actions {
    justify-content: flex-end;
  }
}

/* ---------- 备案细线区块 ---------- */
.page-contact .pc-legal {
  margin-top: clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--pc-line);
  padding-top: 16px;
}

.page-contact .pc-legal-sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 22px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

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

.page-contact .pc-legal-icp {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-contact .pc-legal-tap {
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
  color: var(--deep-teal);
}

.page-contact .pc-legal-details[open] .pc-legal-tap {
  color: var(--red-deep);
  border-bottom-color: var(--red);
}

.page-contact .pc-legal-body {
  margin-top: 18px;
  padding: 18px 0 4px;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .pc-legal-list {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .pc-legal-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 10px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-legal-list dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-contact .pc-legal-list dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-contact .pc-legal-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 46em;
}

@media (min-width: 720px) {
  .page-contact .pc-legal-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 44px);
  }

  .page-contact .pc-legal-list > div {
    grid-template-columns: minmax(0, 4.5em) minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-check,
  .page-contact .pc-legal-details {
    scroll-behavior: auto;
  }
}
<<<END>>>