.page-contact {
  --pc-line: #162B4A;
  background: var(--ink);
  color: var(--body-text);
}

/* ============ 首屏 ============ */
.page-contact .pc-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 34px) 0 46px;
  background: linear-gradient(180deg, #0A1730 0%, var(--ink) 88%);
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--aqua), transparent);
  opacity: .45;
}

.page-contact .pc-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-contact .pc-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .28;
  filter: grayscale(.25) contrast(1.08);
}

.page-contact .pc-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(88% 68% at 6% 0%, rgba(47, 230, 196, .18), transparent 62%),
    radial-gradient(66% 58% at 94% 12%, rgba(91, 140, 255, .16), transparent 66%),
    linear-gradient(180deg, rgba(5, 8, 15, .5), #05080F 94%);
}

.page-contact .pc-hero__inner {
  position: relative;
  max-width: 1180px;
}

.page-contact .pc-hero h1 {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(27px, 6.4vw, 50px);
  line-height: 1.18;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-contact .pc-hero .lede {
  margin: 20px 0 0;
  max-width: 58ch;
  color: var(--body-text);
  font-size: 15.5px;
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .pc-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 32px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--pc-line);
  font-size: 13px;
  color: var(--silver);
}

.page-contact .pc-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-contact .pc-hero__meta .mono {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: .04em;
}

/* ============ 主体分栏 ============ */
.page-contact .pc-body {
  max-width: 1180px;
}

.page-contact .pc-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

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

.page-contact .pc-block {
  padding-top: 40px;
}

/* ============ 合作方向 ============ */
.page-contact .pc-tracks {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.page-contact .pc-track {
  position: relative;
  padding: 22px 18px 20px;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--pc-line);
  clip-path: var(--cut);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}

.page-contact .pc-track::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 52px;
  height: 3px;
  background: linear-gradient(90deg, var(--aqua), transparent);
}

.page-contact .pc-track:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px rgba(47, 230, 196, .42);
}

.page-contact .pc-track__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--aqua);
}

.page-contact .pc-track__title {
  margin: 12px 0 10px;
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-track p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
}

.page-contact .pc-track__foot {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--pc-line);
  font-size: 12.5px;
  color: var(--silver);
  line-height: 1.7;
}

/* ============ 流程 ============ */
.page-contact .pc-block .media-frame {
  margin: 24px 0 0;
}

.page-contact .pc-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .pc-step {
  position: relative;
  padding: 20px 18px 20px 62px;
  background: var(--panel-deep);
  box-shadow: inset 0 0 0 1px var(--pc-line);
  border-radius: 4px 14px 14px 4px;
}

.page-contact .pc-step::after {
  content: "";
  position: absolute;
  left: 29px;
  bottom: -16px;
  width: 2px;
  height: 16px;
  background: linear-gradient(180deg, var(--pc-line), transparent);
}

.page-contact .pc-step:last-child::after {
  content: none;
}

.page-contact .pc-step__no {
  position: absolute;
  left: 14px;
  top: 20px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  background: var(--aqua);
  clip-path: var(--cut-sm);
}

.page-contact .pc-step__title {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
}

/* ============ 反馈通道说明 ============ */
.page-contact .pc-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-contact .pc-note {
  padding: 18px 16px;
  background: linear-gradient(160deg, rgba(11, 22, 40, .96), rgba(7, 16, 30, .96));
  box-shadow: inset 0 0 0 1px var(--pc-line);
  clip-path: var(--cut);
}

.page-contact .pc-note h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 9px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-note h3::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--blue);
  transform: rotate(45deg);
}

.page-contact .pc-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
}

.page-contact .pc-hours {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin: 18px 0 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  border-left: 3px solid var(--orange);
  background: rgba(255, 122, 69, .08);
}

.page-contact .pc-hours .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

/* ============ 服务范围与备案 ============ */
.page-contact .pc-scope {
  padding-top: 40px;
}

.page-contact .pc-scope__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 24px 20px;
  background: linear-gradient(120deg, rgba(11, 22, 40, .92), rgba(5, 8, 15, .92));
  box-shadow: inset 0 0 0 1px var(--pc-line);
  clip-path: var(--cut-lg);
}

.page-contact .pc-scope__inner h2 {
  margin: 10px 0 12px;
  font-size: clamp(20px, 4.6vw, 26px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-contact .pc-scope__inner p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.76;
}

.page-contact .pc-scope__links {
  font-size: 13.5px;
  color: var(--silver);
}

.page-contact .pc-scope__links a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 140, 255, .35);
}

.page-contact .pc-scope__links a:hover {
  color: var(--aqua);
  border-bottom-color: var(--aqua);
}

.page-contact .pc-scope__icp {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--gold);
  white-space: nowrap;
  box-shadow: inset 0 0 0 1px rgba(246, 200, 95, .34);
  clip-path: var(--cut-sm);
}

/* ============ 常见问题 ============ */
.page-contact .pc-faq {
  padding-top: 40px;
}

.page-contact .pc-faq__list {
  margin-top: 20px;
  border-top: 1px solid var(--pc-line);
}

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

.page-contact .pc-faq__item summary {
  position: relative;
  padding: 16px 38px 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color .2s var(--ease);
}

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

.page-contact .pc-faq__item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--aqua);
}

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

.page-contact .pc-faq__item summary:hover {
  color: var(--aqua);
}

.page-contact .pc-faq__item p {
  margin: 0 0 18px;
  padding-right: 6px;
  font-size: 14px;
  line-height: 1.78;
}

/* ============ 联系方式侧卡 ============ */
.page-contact .pc-aside {
  min-width: 0;
  padding-top: 8px;
}

.page-contact .pc-card {
  position: relative;
  padding: 24px 20px 22px;
  background: linear-gradient(170deg, #0C1A2F 0%, var(--panel) 58%, #08111F 100%);
  box-shadow: inset 0 0 0 1px rgba(47, 230, 196, .28);
  clip-path: var(--cut-lg);
}

.page-contact .pc-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--aqua), var(--blue) 55%, transparent);
}

.page-contact .pc-card__head {
  margin-bottom: 8px;
}

.page-contact .pc-card__title {
  margin: 10px 0 6px;
  font-size: 22px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-contact .pc-card__hint {
  margin: 0;
  font-size: 13px;
  color: var(--gold);
}

.page-contact .pc-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 10px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--pc-line);
}

.page-contact .pc-row__key {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
}

.page-contact .pc-row__val {
  grid-column: 1 / 2;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .pc-row .copy-btn {
  grid-column: 2 / 3;
  align-self: start;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--aqua);
  background: transparent;
  border: 1px solid rgba(47, 230, 196, .42);
  cursor: pointer;
  clip-path: var(--cut-sm);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-contact .pc-row .copy-btn:hover {
  background: rgba(47, 230, 196, .14);
}

.page-contact .pc-card__note {
  margin: 18px 0 20px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--silver);
}

/* ============ 底部反馈横条 ============ */
.page-contact .pc-strip {
  margin-top: 52px;
  padding: 34px 0 48px;
  border-top: 1px solid var(--pc-line);
  background: linear-gradient(180deg, rgba(11, 22, 40, .68), transparent 92%);
}

.page-contact .pc-strip__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  max-width: 1180px;
}

.page-contact .pc-strip__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-contact .pc-strip__title {
  margin: 10px 0 8px;
  font-size: clamp(19px, 4.4vw, 24px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-contact .pc-strip__text {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.76;
}

.page-contact .pc-strip .btn {
  justify-self: start;
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-contact .pc-hero {
    padding: calc(var(--header-h) + 48px) 0 58px;
  }

  .page-contact .pc-tracks {
    grid-template-columns: repeat(auto-fit, minmax(246px, 1fr));
  }

  .page-contact .pc-notes {
    grid-template-columns: repeat(auto-fit, minmax(212px, 1fr));
  }
}

@media (min-width: 800px) {
  .page-contact .pc-scope__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
    padding: 26px 26px;
  }

  .page-contact .pc-strip__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-contact .pc-split {
    grid-template-columns: minmax(0, 1.62fr) minmax(310px, .92fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .pc-aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding-top: 40px;
  }

  .page-contact .pc-block,
  .page-contact .pc-scope,
  .page-contact .pc-faq {
    padding-top: 48px;
  }

  .page-contact .pc-hero h1 {
    font-size: 50px;
  }

  .page-contact .pc-step {
    padding: 22px 22px 22px 66px;
  }
}

@media (min-width: 1180px) {
  .page-contact .pc-hero h1 {
    font-size: 54px;
  }
}