.page-contact {
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-contact .pc-h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .pc-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .45);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .pc-link:hover,
.page-contact .pc-link:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-contact .pc-mono {
  font-family: var(--font-mono);
  font-size: .96em;
  letter-spacing: -.01em;
  word-break: break-all;
}

/* ---------- 首屏 ---------- */

.page-contact .pc-hero {
  position: relative;
  padding: 92px 0 56px;
  background:
    radial-gradient(900px 520px at 88% -12%, rgba(55, 230, 178, .14), transparent 62%),
    radial-gradient(760px 460px at 2% 6%, rgba(124, 92, 255, .13), transparent 60%),
    linear-gradient(180deg, #08182B 0%, #0E2033 100%);
  overflow: hidden;
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(147, 167, 188, .09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(147, 167, 188, .09) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 82%);
  pointer-events: none;
}

.page-contact .pc-hero__inner {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-contact .pc-hero .db-crumbs {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-contact .pc-hero__eyebrow {
  margin: 20px 0 0;
  color: var(--lime);
}

.page-contact .pc-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(31px, 7vw, 60px);
  line-height: 1.07;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--paper);
  text-wrap: balance;
}

.page-contact .pc-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.78;
  color: #C4D2E0;
}

.page-contact .pc-hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--stone);
}

.page-contact .pc-hero__points .db-num {
  margin-right: 8px;
  font-size: 12px;
  color: var(--lime);
}

.page-contact .pc-hero__figure {
  margin: 0;
  align-self: start;
}

.page-contact .pc-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(147, 167, 188, .24);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.page-contact .pc-hero__cap {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 三条联系渠道 ---------- */

.page-contact .pc-channels {
  margin-top: 6px;
}

.page-contact .pc-channels__title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--mint);
}

.page-contact .pc-channels__grid {
  display: grid;
  gap: 14px;
}

.page-contact .pc-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 22px 20px 20px;
  background: var(--paper);
  color: var(--ink-900);
  border: 1px solid var(--ink-800);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(8, 24, 43, .55);
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--lime);
}

.page-contact .pc-channel--phone::before { background: var(--mint); }
.page-contact .pc-channel--addr::before { background: var(--orange); }

.page-contact .pc-channel__label {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink-600);
}

.page-contact .pc-channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.45;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
  color: var(--ink-900);
  word-break: break-all;
}

.page-contact .pc-channel--phone .pc-channel__value {
  font-size: clamp(21px, 5vw, 26px);
  letter-spacing: .04em;
}

.page-contact .pc-channel--addr .pc-channel__value {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0;
  word-break: break-word;
}

.page-contact .pc-channel__desc {
  margin: 2px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink-fade);
}

/* ---------- 合作类型 ---------- */

.page-contact .pc-coop {
  padding: 60px 0 64px;
  background: var(--ink-800);
  border-top: 1px solid rgba(147, 167, 188, .14);
}

.page-contact .pc-section-head {
  max-width: 640px;
  margin-bottom: 30px;
}

.page-contact .pc-section-head .db-label {
  color: var(--mint);
}

.page-contact .pc-section-head__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: #B9C8D7;
}

.page-contact .pc-coop__grid {
  display: grid;
  gap: 14px;
}

.page-contact .pc-coop__card {
  background: linear-gradient(158deg, rgba(27, 69, 104, .82), rgba(14, 32, 51, .94));
  border: 1px solid rgba(147, 167, 188, .22);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-contact .pc-coop__card:hover {
  border-color: rgba(200, 255, 61, .42);
}

.page-contact .pc-coop__card[open] {
  border-color: rgba(200, 255, 61, .55);
}

.page-contact .pc-coop__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 18px;
  list-style: none;
  cursor: pointer;
}

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

.page-contact .pc-coop__head:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
}

.page-contact .pc-coop__num {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-contact .pc-coop__headText {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-contact .pc-coop__name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .pc-coop__tag {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mint);
}

.page-contact .pc-coop__cue {
  flex: none;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--stone);
  transition: color .2s var(--ease);
}

.page-contact .pc-coop__card[open] .pc-coop__cue { color: var(--lime); }

.page-contact .pc-coop__body {
  padding: 16px 18px 22px 46px;
  border-top: 1px solid rgba(147, 167, 188, .18);
  font-size: 14.5px;
  line-height: 1.78;
  color: #C4D2E0;
}

.page-contact .pc-coop__body p {
  margin: 0;
}

.page-contact .pc-coop__list {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 7px;
  font-size: 14px;
  line-height: 1.7;
  color: #AEBFCF;
}

.page-contact .pc-coop__list li::marker {
  color: var(--mint);
}

/* ---------- 来信清单（浅色区） ---------- */

.page-contact .pc-brief {
  padding: 60px 0 64px;
  background: var(--paper);
  color: var(--ink-900);
}

.page-contact .pc-brief__grid {
  display: grid;
  gap: 30px;
}

.page-contact .pc-brief .db-label {
  color: var(--ink-600);
}

.page-contact .pc-brief__title {
  color: var(--ink-900);
}

.page-contact .pc-brief__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-fade);
}

.page-contact .pc-brief__hint {
  margin: 20px 0 0;
  padding: 14px 16px;
  background: #fff;
  border-left: 3px solid var(--ink-600);
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-900);
}

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

.page-contact .pc-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid rgba(14, 32, 51, .16);
  border-left: 3px solid var(--ink-600);
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-900);
}

.page-contact .pc-checklist__box {
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1.5px solid var(--ink-600);
  border-radius: 2px;
  background:
    linear-gradient(135deg, rgba(200, 255, 61, .55) 0 40%, transparent 40% 100%);
}

.page-contact .pc-checklist strong {
  font-weight: 700;
  color: var(--ink-800);
}

/* ---------- 收信流程 ---------- */

.page-contact .pc-flow {
  padding: 60px 0 64px;
  background:
    radial-gradient(760px 420px at 92% 0%, rgba(55, 230, 178, .10), transparent 65%),
    var(--ink-900);
}

.page-contact .pc-flow__inner {
  display: grid;
  gap: 34px;
}

.page-contact .pc-flow .db-label {
  color: var(--mint);
}

.page-contact .pc-flow__lead {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: #B9C8D7;
}

.page-contact .pc-flow__steps {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .pc-flow__step {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: rgba(27, 69, 104, .48);
  border: 1px solid rgba(147, 167, 188, .18);
  border-radius: var(--radius);
}

.page-contact .pc-flow__node {
  margin-top: 3px;
}

.page-contact .pc-flow__stepTitle {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .pc-flow__stepText {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: #AEBFCF;
}

.page-contact .pc-flow__note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

.page-contact .pc-flow__figure {
  margin: 0;
  align-self: start;
}

.page-contact .pc-flow__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(147, 167, 188, .22);
}

/* ---------- 常见问题 ---------- */

.page-contact .pc-faq {
  padding: 58px 0 60px;
  background: var(--ink-800);
  border-top: 1px solid rgba(147, 167, 188, .14);
}

.page-contact .pc-section-head--tight {
  margin-bottom: 26px;
}

.page-contact .pc-faq__grid {
  display: grid;
  gap: 12px;
}

.page-contact .pc-faq__item {
  padding: 20px 18px;
  background: rgba(8, 24, 43, .46);
  border: 1px solid rgba(147, 167, 188, .18);
  border-top: 2px solid var(--mint);
  border-radius: var(--radius);
}

.page-contact .pc-faq__q {
  margin: 0 0 9px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .pc-faq__a {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: #B9C8D7;
}

.page-contact .pc-faq__more {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */

.page-contact .pc-outro {
  padding: 0 0 68px;
  background: var(--ink-800);
}

.page-contact .pc-outro__inner {
  display: grid;
  gap: 22px;
  padding-top: 34px;
  border-top: 1px solid rgba(147, 167, 188, .2);
}

.page-contact .pc-outro__title {
  margin-top: 0;
  font-size: clamp(22px, 4vw, 30px);
}

.page-contact .pc-outro__lead {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.78;
  color: #B9C8D7;
}

.page-contact .pc-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .pc-channels__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .pc-channel--addr {
    grid-column: 1 / -1;
  }
  .page-contact .pc-coop__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .pc-faq__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero {
    padding: 124px 0 64px;
  }
  .page-contact .pc-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 46px 52px;
    align-items: start;
  }
  .page-contact .pc-channels {
    grid-column: 1 / -1;
    margin-top: 4px;
  }
  .page-contact .pc-channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .pc-channel--addr {
    grid-column: auto;
  }
  .page-contact .pc-brief__grid {
    grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
    gap: 52px;
    align-items: start;
  }
  .page-contact .pc-flow__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 52px;
    align-items: start;
  }
  .page-contact .pc-faq__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .pc-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
  .page-contact .pc-outro__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-contact .pc-coop {
    padding: 72px 0 78px;
  }
  .page-contact .pc-brief,
  .page-contact .pc-flow,
  .page-contact .pc-faq {
    padding-top: 72px;
    padding-bottom: 76px;
  }
  .page-contact .pc-channel {
    padding: 26px 24px 24px;
  }
}

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