.page-contact {
  --pc-warm-edge: rgba(20, 24, 31, .22);
  --pc-accent: var(--nebula);
  background: var(--ink-deep);
  color: var(--frost);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  padding-bottom: clamp(30px, 5vw, 64px);
}

.page-contact .pc-hero__banner {
  position: relative;
  height: clamp(170px, 30vw, 340px);
  overflow: hidden;
  background: var(--ink-module);
}

.page-contact .pc-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: .62;
}

.page-contact .pc-hero__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(130% 120% at 84% 6%, rgba(109, 63, 196, .58), transparent 62%),
    radial-gradient(90% 90% at 8% 96%, rgba(42, 212, 224, .22), transparent 60%),
    linear-gradient(180deg, rgba(10, 19, 48, .18) 0%, rgba(10, 19, 48, .64) 60%, var(--ink-deep) 100%);
}

.page-contact .pc-hero__body {
  position: relative;
  margin-top: clamp(-58px, -4.5vw, -22px);
}

.page-contact .pc-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-contact .pc-hero__crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .pc-hero__crumbs a:hover,
.page-contact .pc-hero__crumbs a:focus-visible {
  color: var(--volt);
  border-bottom-color: var(--volt);
  outline: none;
}

.page-contact .pc-hero__crumbs span[aria-current] {
  color: var(--frost);
}

.page-contact .pc-hero__eyebrow {
  margin: 26px 0 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--volt);
}

.page-contact .pc-hero__title {
  margin: 12px 0 0;
  max-width: 18ch;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--frost);
}

.page-contact .pc-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.86;
  color: rgba(232, 238, 249, .82);
}

.page-contact .pc-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .pc-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 132px;
}

.page-contact .pc-fact dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-contact .pc-fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--frost);
}

.page-contact .pc-fact dd .mono {
  font-size: 17px;
  color: var(--flame);
}

/* ---------- 区块外壳 ---------- */
.page-contact .pc-block {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-contact .pc-head {
  max-width: 720px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-contact .pc-head--tight {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .pc-head__kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--volt);
}

.page-contact .pc-head__title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--frost);
}

.page-contact .pc-head__desc {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(232, 238, 249, .74);
}

/* ---------- 联系渠道 ---------- */
.page-contact .pc-channels__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

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

.page-contact .channel-card {
  position: relative;
  padding: 22px 22px 20px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 7px 7px 0 rgba(10, 19, 48, .72);
}

.page-contact .channel-card--address {
  box-shadow: 4px 4px 0 rgba(109, 63, 196, .62);
}

.page-contact .channel-card__tag {
  display: inline-block;
  padding: 4px 11px;
  border: 1px solid rgba(20, 24, 31, .5);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink);
}

.page-contact .channel-card__value {
  margin: 13px 0 0;
  font-size: clamp(15px, 1.7vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .channel-card__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(20, 24, 31, .76);
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 9px 17px;
  border: 1px solid var(--nebula);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: 500 13px/1 var(--font-sans);
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--nebula);
  border-color: var(--nebula);
  color: var(--frost);
  outline: none;
}

.page-contact .copy-btn.is-copied {
  background: var(--volt);
  border-color: var(--volt);
  color: var(--ink);
}

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

.page-contact .pc-channels__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-contact .image-frame__caption {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 受理范围 ---------- */
.page-contact .help-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .help-card {
  position: relative;
  overflow: hidden;
  padding: 26px 24px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(22, 34, 77, .95), rgba(22, 34, 77, .52));
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-contact .help-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--pc-accent);
}

.page-contact .help-card:hover {
  border-color: var(--pc-accent);
  transform: translateY(-4px);
}

.page-contact .help-card--flame { --pc-accent: var(--flame); }
.page-contact .help-card--volt { --pc-accent: var(--volt); }
.page-contact .help-card--nebula { --pc-accent: var(--nebula-soft); }
.page-contact .help-card--river { --pc-accent: var(--river); }

.page-contact .help-card__no {
  margin: 0;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--pc-accent);
}

.page-contact .help-card__title {
  margin: 14px 0 0;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--frost);
}

.page-contact .help-card__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(232, 238, 249, .74);
}

/* ---------- 合作流程 ---------- */
.page-contact .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .flow-step {
  position: relative;
  padding: 22px 0 22px 34px;
  border-left: 1px solid var(--line);
}

.page-contact .flow-step__dot {
  position: absolute;
  left: -6px;
  top: 30px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--volt);
  transition: background .24s var(--ease), transform .24s var(--ease);
}

.page-contact .flow-step:hover .flow-step__dot {
  background: var(--volt);
  transform: scale(1.2);
}

.page-contact .flow-step__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-contact .flow-step__title {
  margin: 10px 0 0;
  font-size: 1.1rem;
  color: var(--frost);
}

.page-contact .flow-step__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(232, 238, 249, .72);
}

.page-contact .flow-step__out {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--volt);
  opacity: .5;
  transition: opacity .24s var(--ease);
}

.page-contact .flow-step:hover .flow-step__out,
.page-contact .flow-step:focus-within .flow-step__out {
  opacity: 1;
}

/* ---------- 常见合作对象 ---------- */
.page-contact .partner-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .partner-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-module);
  box-shadow: var(--shadow-card);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-contact .partner-card:hover {
  border-color: var(--nebula);
  transform: translateY(-4px);
}

.page-contact .partner-card__role {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--volt);
}

.page-contact .partner-card__text {
  margin: auto 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(232, 238, 249, .72);
}

/* ---------- 需求清单 ---------- */
.page-contact .pc-brief__panel {
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(109, 63, 196, .34), transparent 58%),
    var(--ink-module);
}

.page-contact .brief-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.page-contact .brief-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-content: start;
  padding: 22px 20px;
  background: var(--ink-deep);
}

.page-contact .brief-item__no {
  grid-row: span 2;
  margin: 0;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--flame);
}

.page-contact .brief-item__title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--frost);
}

.page-contact .brief-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(232, 238, 249, .72);
}

/* ---------- 延伸入口 ---------- */
.page-contact .pc-next {
  padding: clamp(40px, 6vw, 76px) 0 clamp(52px, 8vw, 96px);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(62, 123, 182, 0), rgba(62, 123, 182, .1));
}

.page-contact .pc-next__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  letter-spacing: -.005em;
  color: var(--frost);
}

.page-contact .pc-next__desc {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 238, 249, .72);
}

.page-contact .next-links {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--line-soft);
}

.page-contact .next-links a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  color: inherit;
  text-decoration: none;
  background: var(--ink-deep);
  transition: background .24s var(--ease);
}

.page-contact .next-links a:hover,
.page-contact .next-links a:focus-visible {
  background: var(--ink-module);
  outline: none;
}

.page-contact .next-links span {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--volt);
}

.page-contact .next-links em {
  font-style: normal;
  font-size: 15px;
  line-height: 1.62;
  color: var(--frost);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .partner-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-contact .help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 880px) {
  .page-contact .flow-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow-step {
    padding: 42px 26px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-contact .flow-step__dot {
    left: 0;
    top: -6px;
  }
}

@media (min-width: 940px) {
  .page-contact .pc-channels__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }

  .page-contact .partner-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: end;
    gap: 18px;
  }

  .page-contact .partner-card:nth-child(1) { min-height: 268px; }
  .page-contact .partner-card:nth-child(2) { min-height: 238px; }
  .page-contact .partner-card:nth-child(3) { min-height: 210px; }
  .page-contact .partner-card:nth-child(4) { min-height: 184px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .help-card,
  .page-contact .partner-card,
  .page-contact .flow-step__dot,
  .page-contact .flow-step__out,
  .page-contact .copy-btn,
  .page-contact .next-links a {
    transition: opacity .2s linear;
    transform: none !important;
  }

  .page-contact .flow-step__out {
    opacity: 1;
  }
}