.page-contact {
  --pc-gap: 18px;
  --pc-line: 2px solid var(--grid-line);
  --pc-pad: 20px;
  overflow-x: hidden;
}

.page-contact .section {
  padding: 36px 0;
}

.page-contact .section__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.15;
  font-weight: 800;
  font-style: italic;
  color: var(--ice);
  margin: 0 0 10px;
}

.page-contact .pc-sub {
  max-width: 36em;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  padding: 22px 0 6px;
  border-bottom: var(--pc-line);
}

.page-contact .pc-hero__grid {
  display: grid;
  gap: 26px;
  padding-bottom: 26px;
}

.page-contact .pc-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .pc-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--lime);
  flex: none;
}

.page-contact .pc-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5.4vw, 54px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--ice);
  margin: 0 0 18px;
  max-width: 16em;
}

.page-contact .pc-lede {
  max-width: 32em;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .pc-quick {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-contact .pc-quick__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--blueprint);
  border: var(--pc-line);
}

.page-contact .pc-quick__value {
  flex: none;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-contact .pc-quick__plus {
  font-size: 18px;
  color: var(--orange-soft);
}

.page-contact .pc-quick__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 合作形式 ---------- */
.page-contact .pc-forms__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-contact .pc-form {
  position: relative;
  padding: 20px 18px 26px;
  background: var(--blueprint);
  border: var(--pc-line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .pc-form::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 26px 26px;
  border-color: transparent transparent var(--deep) transparent;
}

.page-contact .pc-form:hover,
.page-contact .pc-form:focus-within {
  border-color: var(--orange);
  transform: translate(-2px, -2px);
}

.page-contact .pc-form__no {
  display: inline-block;
  padding: 2px 8px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--deep);
  background: var(--orange);
  font-weight: 700;
}

.page-contact .pc-form__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  font-style: italic;
  line-height: 1.25;
  color: var(--ice);
  margin: 0 0 10px;
}

.page-contact .pc-form__who {
  margin: 0 0 14px;
  padding-bottom: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
  border-bottom: 1px dashed var(--grid-line);
}

.page-contact .pc-form__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .pc-form__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .pc-form__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ice);
}

.page-contact .pc-form__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 7px;
  height: 7px;
  background: var(--lime);
}

/* ---------- 流程 ---------- */
.page-contact .pc-flow__fig {
  margin: 0 0 28px;
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--pc-line);
}

.page-contact .pc-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2px;
}

.page-contact .pc-step {
  position: relative;
  margin-left: 10px;
  padding: 0 0 26px 34px;
  border-left: var(--pc-line);
}

.page-contact .pc-step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-contact .pc-step__dot {
  position: absolute;
  left: -11px;
  top: 2px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--deep);
  box-shadow: 0 0 0 2px var(--lime);
}

.page-contact .pc-step__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--ice);
  margin: 0 0 7px;
  line-height: 1.35;
}

.page-contact .pc-step__body p {
  margin: 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 材料与联系 ---------- */
.page-contact .pc-coop__grid {
  gap: 28px;
}

.page-contact .pc-checklist {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .pc-check {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: var(--blueprint);
  border: 1px solid var(--grid-line);
  border-left: 3px solid var(--cyan);
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

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

.page-contact .pc-check__box {
  flex: none;
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border: 2px solid var(--cyan);
}

.page-contact .pc-check__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(42deg);
}

.page-contact .pc-materials__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .pc-coop__side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-contact .pc-contactcard {
  position: relative;
  padding: 26px 20px 22px;
  background: var(--paper);
  color: var(--deep);
  border: 2px solid var(--deep);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-contact .pc-contactcard::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--orange);
}

.page-contact .pc-contactcard__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: #5a6b91;
}

.page-contact .pc-contactcard__title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  font-style: italic;
  line-height: 1.25;
  color: var(--deep);
  margin: 0 0 18px;
}

.page-contact .pc-contactcard__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .pc-contactcard__list li {
  display: grid;
  gap: 3px;
  padding-bottom: 13px;
  border-bottom: 1px solid rgba(8, 17, 38, .16);
}

.page-contact .pc-contactcard__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .pc-contactcard__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: #5a6b91;
}

.page-contact .pc-contactcard__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--deep);
  font-weight: 600;
  word-break: break-word;
}

.page-contact .pc-contactcard__note {
  margin: 0;
  padding-top: 14px;
  border-top: 2px solid var(--orange);
  font-size: 13px;
  line-height: 1.7;
  color: #3a4a६8;
  color: #3a4a68;
}

/* ---------- 常见问题 ---------- */
.page-contact .pc-faq__list {
  display: grid;
  gap: 10px;
}

.page-contact .pc-faq__item {
  background: var(--blueprint);
  border: var(--pc-line);
}

.page-contact .pc-faq__item summary {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 15px 48px 15px 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-faq__item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
}

.page-contact .pc-faq__item[open] summary::after {
  content: "–";
}

.page-contact .pc-faq__item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

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

.page-contact .pc-faq__item p {
  margin: 0;
  padding: 14px 16px 18px;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 延伸入口 ---------- */
.page-contact .pc-more__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-contact .pc-more__card {
  display: grid;
  gap: 6px;
  padding: 18px;
  background: var(--deep);
  border: var(--pc-line);
  color: var(--ice);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .pc-more__card:hover,
.page-contact .pc-more__card:focus-visible {
  border-color: var(--cyan);
  background: var(--blueprint);
}

.page-contact .pc-more__card span:first-child {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .pc-more__card span:last-child {
  font-size: 14px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .pc-quick__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .page-contact .pc-more__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    align-items: start;
  }
  .page-contact .pc-forms__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-contact .pc-form {
    padding: 24px 22px 30px;
  }
  .page-contact .pc-timeline {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }
  .page-contact .pc-step:nth-last-child(-n+1) {
    padding-bottom: 0;
  }
  .page-contact .pc-step:nth-child(5) {
    border-left-color: transparent;
  }
}

@media (min-width: 1040px) {
  .page-contact .section {
    padding: 48px 0;
  }
  .page-contact .pc-contactcard {
    padding: 30px 26px 26px;
  }
  .page-contact .pc-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 30px;
  }
  .page-contact .pc-step:nth-child(5) {
    border-left-color: var(--grid-line);
  }
  .page-contact .pc-step:last-child {
    border-left-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-form,
  .page-contact .pc-more__card {
    transition: none;
  }
  .page-contact .pc-form:hover,
  .page-contact .pc-form:focus-within {
    transform: none;
  }
}