.page-contact {
  --pc-hairline: rgba(47, 54, 70, .72);
  --pc-panel: rgba(18, 22, 32, .82);
  --pc-flame-soft: rgba(255, 90, 31, .12);
  --pc-data-soft: rgba(45, 156, 255, .12);
  --pc-neon-soft: rgba(184, 255, 59, .10);
  --pc-amber-soft: rgba(255, 176, 32, .12);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-contact .pc-crumb {
  margin: 0 0 clamp(20px, 4vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 6vw, 62px) 0 clamp(38px, 7vw, 78px);
  border-bottom: var(--hair);
  background:
    radial-gradient(130% 95% at 92% -6%, rgba(255, 90, 31, .20), transparent 58%),
    radial-gradient(90% 70% at 4% 110%, rgba(45, 156, 255, .12), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--char) 100%);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--pc-hairline) 1px, transparent 1px),
    linear-gradient(to bottom, var(--pc-hairline) 1px, transparent 1px);
  background-size: 78px 78px;
  opacity: .38;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
          mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
}

.page-contact .pc-hero .shell {
  position: relative;
  z-index: 1;
}

.page-contact .pc-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 52px);
  align-items: start;
}

.page-contact .pc-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.4vw, 58px);
  font-weight: 200;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ice);
  max-width: 20ch;
}

.page-contact .pc-hero__lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.78;
  color: var(--text);
}

.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: 28px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: var(--hair);
  font-size: 13px;
  color: var(--slate);
}

.page-contact .pc-hero__meta li {
  position: relative;
  padding-left: 14px;
}

.page-contact .pc-hero__meta li::before {
  content: "";
  position: absolute;
  top: .62em;
  left: 0;
  width: 6px;
  height: 1px;
  background: var(--flame);
}

.page-contact .pc-hero__meta .num {
  color: var(--neon);
  font-size: 13px;
}

.page-contact .pc-hero__figure {
  position: relative;
  border: 1px solid var(--pc-hairline);
  background: var(--char-2);
  box-shadow: 0 22px 48px rgba(0, 0, 0, .42);
}

.page-contact .pc-hero__figure::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 74px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--flame));
}

.page-contact .pc-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.04);
}

/* ---------- 通用题头 ---------- */
.page-contact .pc-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4.4vw, 42px);
}

.page-contact .pc-head h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 4.6vw, 32px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--ice);
}

/* ---------- 三条联系通道 ---------- */
.page-contact .pc-channels {
  background: linear-gradient(180deg, var(--ink) 0%, #0D1017 100%);
}

.page-contact .pc-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .pc-channel {
  position: relative;
  padding: 24px 22px 22px;
  border: 1px solid var(--pc-hairline);
  background: var(--pc-panel);
  overflow: hidden;
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--flame);
}

.page-contact .pc-channel--biz::before { background: var(--data); }
.page-contact .pc-channel--phone::before { background: var(--neon); }

.page-contact .pc-channel__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-contact .pc-channel h3 {
  margin: 10px 0 12px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--ice);
}

.page-contact .pc-channel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--text);
}

.page-contact .pc-channel__value {
  margin-top: 16px !important;
  padding: 12px 14px;
  background: rgba(10, 12, 16, .6);
  border: 1px dashed var(--pc-hairline);
  font-size: 13.5px;
  color: var(--ice);
  word-break: break-all;
}

.page-contact .pc-channel--service .pc-channel__value { color: #FFC7AE; }
.page-contact .pc-channel--biz .pc-channel__value { color: #A9D6FF; }
.page-contact .pc-channel--phone .pc-channel__value { color: var(--neon); }

.page-contact .pc-channel__note {
  margin-top: 10px !important;
  font-size: 12.5px;
  color: var(--slate);
}

/* ---------- 合作方向 ---------- */
.page-contact .pc-kinds {
  background: var(--ink);
  border-top: var(--hair);
}

.page-contact .pc-kinds__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--pc-hairline);
  border: 1px solid var(--pc-hairline);
}

.page-contact .pc-kind {
  position: relative;
  padding: 26px 22px;
  background: var(--char);
  transition: background .25s var(--ease), transform .25s var(--ease);
}

.page-contact .pc-kind:nth-child(1) { box-shadow: inset 3px 0 0 var(--flame); }
.page-contact .pc-kind:nth-child(2) { box-shadow: inset 3px 0 0 var(--data); }
.page-contact .pc-kind:nth-child(3) { box-shadow: inset 3px 0 0 var(--neon); }
.page-contact .pc-kind:nth-child(4) { box-shadow: inset 3px 0 0 var(--amber); }
.page-contact .pc-kind:nth-child(5) { box-shadow: inset 3px 0 0 var(--flame-deep); }

.page-contact .pc-kind h3 {
  margin: 12px 0 12px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.36;
  color: var(--ice);
}

.page-contact .pc-kind__tag {
  display: flex;
  justify-content: flex-start;
}

.page-contact .pc-kind__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-contact .pc-kind__fit {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: var(--hair);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--slate);
}

/* ---------- 地址 ---------- */
.page-contact .pc-place {
  background: linear-gradient(180deg, #0C0F15 0%, var(--char) 100%);
  border-top: var(--hair);
}

.page-contact .pc-place__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 48px);
  align-items: start;
}

.page-contact .pc-place h2 {
  margin: 12px 0 0;
  font-size: clamp(21px, 4.6vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ice);
}

.page-contact .pc-place__lead {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-contact .pc-place__facts {
  margin: 26px 0 0;
  border-top: var(--hair);
}

.page-contact .pc-place__fact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 15px 0;
  border-bottom: var(--hair);
}

.page-contact .pc-place__fact dt {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-contact .pc-place__fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ice);
  word-break: break-word;
}

.page-contact .pc-place__fact dd.num {
  color: var(--neon);
  font-size: 14.5px;
}

.page-contact .pc-place__tip {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  background: var(--pc-amber-soft);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .pc-place__figure {
  border: 1px solid var(--pc-hairline);
  background: var(--char-2);
}

.page-contact .pc-place__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 合作流程时间线 ---------- */
.page-contact .pc-flow {
  background: var(--ink);
  border-top: var(--hair);
}

.page-contact .pc-flow__line {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-contact .pc-flow__line::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--flame) 0%, var(--data) 52%, var(--neon) 100%);
  opacity: .68;
}

.page-contact .pc-step {
  position: relative;
  padding: 0 0 30px;
}

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

.page-contact .pc-step__dot {
  position: absolute;
  top: 6px;
  left: -28px;
  width: 14px;
  height: 14px;
  border: 2px solid var(--flame);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, .14);
}

.page-contact .pc-step:nth-child(2) .pc-step__dot {
  border-color: #E2551C;
  box-shadow: 0 0 0 4px rgba(226, 85, 28, .14);
}

.page-contact .pc-step:nth-child(3) .pc-step__dot {
  border-color: var(--data);
  box-shadow: 0 0 0 4px var(--pc-data-soft);
}

.page-contact .pc-step:nth-child(4) .pc-step__dot {
  border-color: var(--neon);
  box-shadow: 0 0 0 4px var(--pc-neon-soft);
}

.page-contact .pc-step__idx {
  display: block;
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--slate);
}

.page-contact .pc-step h3 {
  margin: 8px 0 10px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}

.page-contact .pc-step p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 资料准备 ---------- */
.page-contact .pc-prep {
  background: var(--char);
  border-top: var(--hair);
}

.page-contact .pc-prep__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .pc-prep__item {
  padding: 22px 20px;
  border: 1px solid var(--pc-hairline);
  background: linear-gradient(160deg, rgba(22, 27, 38, .95) 0%, rgba(10, 12, 16, .95) 100%);
}

.page-contact .pc-prep__item h3 {
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--pc-hairline);
  font-size: 15px;
  font-weight: 700;
  color: var(--flame);
}

.page-contact .pc-prep__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-prep__list li {
  position: relative;
  padding: 0 0 10px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

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

.page-contact .pc-prep__list li::before {
  content: "";
  position: absolute;
  top: .72em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--slate);
}

/* ---------- 常见问题 ---------- */
.page-contact .pc-faq {
  background: var(--ink);
  border-top: var(--hair);
}

.page-contact .pc-faq__list {
  border-top: var(--hair);
}

.page-contact .pc-qa {
  border-bottom: var(--hair);
}

.page-contact .pc-qa summary {
  position: relative;
  padding: 18px 40px 18px 0;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
  list-style: none;
}

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

.page-contact .pc-qa summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 400;
  color: var(--flame);
}

.page-contact .pc-qa[open] summary::after {
  content: "−";
  color: var(--neon);
}

.page-contact .pc-qa summary:hover {
  color: var(--flame);
}

.page-contact .pc-qa p {
  margin: 0;
  padding: 0 0 20px;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .pc-qa p a {
  color: var(--data);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 156, 255, .45);
}

/* ---------- 下一步 ---------- */
.page-contact .pc-next {
  background: linear-gradient(180deg, var(--char) 0%, var(--ink) 100%);
  border-top: var(--hair);
}

.page-contact .pc-next__panel {
  position: relative;
  padding: clamp(26px, 5vw, 44px) clamp(22px, 4vw, 46px);
  border: 1px solid var(--pc-hairline);
  background:
    radial-gradient(120% 130% at 100% 0%, var(--pc-flame-soft), transparent 62%),
    var(--char-2);
}

.page-contact .pc-next__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, var(--flame), transparent);
}

.page-contact .pc-next__copy h2 {
  margin: 12px 0 0;
  font-size: clamp(20px, 4.4vw, 30px);
  font-weight: 700;
  line-height: 1.32;
  color: var(--ice);
}

.page-contact .pc-next__copy p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-contact .pc-next__copy a {
  color: var(--data);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 156, 255, .45);
}

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

.page-contact .pc-next__note {
  margin: 24px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--slate);
  word-break: break-word;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {
  .page-contact .pc-channels__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-contact .pc-place__fact {
    grid-template-columns: 120px 1fr;
    align-items: baseline;
    gap: 16px;
  }

  .page-contact .pc-prep__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-contact .pc-next__panel {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 32px;
    align-items: center;
  }

  .page-contact .pc-next__actions {
    margin-top: 0;
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: 1.08fr .92fr;
    gap: 56px;
  }

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

  .page-contact .pc-kind:nth-child(5) {
    grid-column: 1 / -1;
  }

  .page-contact .pc-place__grid {
    grid-template-columns: 1.05fr .95fr;
  }

  .page-contact .pc-flow__line {
    padding-left: 40px;
  }

  .page-contact .pc-flow__line::before {
    left: 8px;
  }

  .page-contact .pc-step__dot {
    left: -40px;
    width: 18px;
    height: 18px;
  }

  .page-contact .pc-prep__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .pc-kind {
    padding: 30px 28px;
  }

  .page-contact .pc-channel {
    padding: 28px 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-kind,
  .page-contact .pc-channel {
    transition: none;
  }
}
<<<END>>>