.page-contact {
  --pc-radius: 4px;
  --pc-paper-edge: rgba(11, 18, 32, 0.1);
  --pc-shadow: 0 24px 60px -34px rgba(0, 0, 0, 0.62);
  --pc-ink-soft: #3b4b5c;
  color: var(--c-haze);
  font-family: var(--font-sans);
  line-height: 1.75;
}

.page-contact a {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-contact .pc-shell {
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 40px var(--pad-x) 0;
}

/* 面包屑 */
.page-contact .pc-crumbs {
  margin-bottom: 44px;
}

.page-contact .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .breadcrumbs__link {
  color: var(--c-haze);
}

.page-contact .breadcrumbs__link:hover {
  color: var(--c-cyan);
}

.page-contact .breadcrumbs__sep {
  color: var(--c-mist);
}

.page-contact .breadcrumbs__current {
  color: var(--c-cyan);
}

/* 首屏 */
.page-contact .pc-intro {
  max-width: 940px;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--hair);
}

.page-contact .pc-intro__eyebrow {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .pc-intro__title {
  margin: 0 0 24px;
  font-size: clamp(34px, 6.4vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-contact .pc-intro__title em {
  font-style: normal;
  color: var(--c-cyan);
}

.page-contact .pc-intro__lede {
  margin: 0 0 28px;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 18px);
  color: var(--c-haze);
}

.page-contact .pc-intro__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 章节公共头 */
.page-contact .pc-channels__head,
.page-contact .pc-coop__head,
.page-contact .pc-faq__head {
  max-width: 740px;
  margin-bottom: 40px;
}

.page-contact .section__eyebrow {
  font-family: var(--font-mono);
}

.page-contact .section__title {
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

/* 01 联系方式 */
.page-contact .pc-channels {
  padding-top: 72px;
}

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

.page-contact .pc-channels__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--hair);
  min-width: 0;
}

.page-contact .pc-channel {
  padding: 28px 0;
  border-bottom: 1px solid var(--hair);
  min-width: 0;
}

.page-contact .pc-channel__key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-contact .pc-channel__val {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-paper);
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.page-contact .pc-channel__val a {
  color: var(--c-paper);
  border-bottom: 1px solid transparent;
}

.page-contact .pc-channel__val a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.page-contact .pc-channel__val--time {
  color: var(--c-cyan);
}

.page-contact .pc-channel__note {
  margin: 0 0 14px;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-haze);
  opacity: 0.84;
}

.page-contact .copy-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* 纸白回执卡 */
.page-contact .pc-receipt {
  position: relative;
  background: var(--c-paper);
  color: var(--c-ink);
  border: 1px solid var(--ink-hair);
  border-radius: 0 var(--pc-radius) var(--pc-radius) var(--pc-radius);
  box-shadow: var(--pc-shadow);
  padding: 28px 22px 24px;
  min-width: 0;
}

.page-contact .pc-receipt::before {
  content: "";
  position: absolute;
  top: -9px;
  left: 22px;
  right: 22px;
  height: 9px;
  background: #e7e9e0;
  border: 1px solid var(--ink-hair);
  border-bottom: 0;
  border-radius: var(--pc-radius) var(--pc-radius) 0 0;
}

.page-contact .pc-receipt .panel__head {
  border-bottom: 1px solid var(--ink-hair);
  padding-bottom: 12px;
}

.page-contact .pc-receipt .panel__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--c-ink);
}

.page-contact .pc-receipt .figure-frame {
  margin: 18px 0 20px;
  border: 1px solid var(--ink-hair);
}

.page-contact .pc-receipt .figure-frame__cap {
  color: var(--c-teal);
  font-family: var(--font-mono);
  font-size: 11px;
}

.page-contact .pc-checklist {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink-hair);
}

.page-contact .pc-checklist__item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--ink-hair);
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-contact .pc-checklist__num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-teal);
  font-size: 13px;
}

.page-contact .pc-receipt__cta {
  display: inline-flex;
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* 02 合作咨询 */
.page-contact .pc-coop {
  margin-top: 80px;
  padding: 44px 22px;
  background: var(--c-trench);
  border: 1px solid var(--hair);
  border-radius: var(--pc-radius);
}

.page-contact .pc-coop__tabs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: start;
}

.page-contact .pc-coop__item {
  background: rgba(3, 16, 28, 0.55);
  border: 1px solid var(--hair);
  border-radius: var(--pc-radius);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .pc-coop__item[open] {
  border-color: var(--c-cyan);
  background: rgba(33, 212, 224, 0.07);
}

.page-contact .pc-coop__summary {
  display: grid;
  grid-template-columns: 38px 1fr;
  grid-template-rows: auto auto;
  gap: 4px 12px;
  align-items: baseline;
  padding: 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-coop__num {
  grid-row: span 2;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .pc-coop__label {
  font-size: 17px;
  font-weight: 800;
  color: var(--c-paper);
  line-height: 1.4;
}

.page-contact .pc-coop__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-contact .pc-coop__body {
  padding: 0 20px 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-haze);
}

.page-contact .pc-coop__body p {
  margin: 0 0 10px;
}

.page-contact .pc-coop__lead {
  margin: 14px 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .pc-coop__list {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.95;
  color: var(--c-haze);
}

/* 03 反馈流程 —— 纸白阅读区 */
.page-contact .pc-flow {
  margin-top: 80px;
  background: var(--c-paper);
  color: var(--c-ink);
  border-radius: var(--pc-radius);
  box-shadow: var(--pc-shadow);
  padding: 36px 22px 28px;
}

.page-contact .pc-flow .section__eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-teal);
}

.page-contact .pc-flow .section__title {
  margin: 0 0 12px;
  font-size: clamp(26px, 4vw, 38px);
  color: var(--c-ink);
}

.page-contact .pc-flow .section__lede {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--pc-ink-soft);
}

.page-contact .pc-flow__steps {
  display: grid;
  grid-template-columns: 1fr;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink-hair);
}

.page-contact .pc-flow__step {
  padding: 20px 0;
  border-bottom: 1px solid var(--ink-hair);
}

.page-contact .pc-flow__step:last-child {
  border-bottom: 0;
}

.page-contact .pc-flow__stepnum {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-teal);
}

.page-contact .pc-flow__step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-contact .pc-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pc-ink-soft);
}

/* 04 地址与邮寄 */
.page-contact .pc-mail {
  margin-top: 80px;
}

.page-contact .pc-mail__card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 30px 22px;
  background: linear-gradient(140deg, rgba(8, 37, 58, 0.96), rgba(3, 16, 28, 0.96));
  border: 1px solid var(--hair-strong);
  border-left: 4px solid var(--c-cyan);
  border-radius: 0 var(--pc-radius) var(--pc-radius) 0;
}

.page-contact .pc-mail .section__eyebrow {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .pc-mail .section__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.6vw, 34px);
  color: var(--c-paper);
}

.page-contact .pc-mail__address {
  margin: 0 0 14px;
  font-style: normal;
  font-family: var(--font-sans);
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--c-paper);
}

.page-contact .pc-mail__note {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-haze);
  opacity: 0.86;
}

.page-contact .pc-mail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* 05 常见问题 */
.page-contact .pc-faq {
  margin-top: 80px;
}

.page-contact .pc-faq__list {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--hair);
}

.page-contact .pc-faq__item {
  border-bottom: 1px solid var(--hair);
  min-width: 0;
}

.page-contact .pc-faq__q {
  position: relative;
  padding: 18px 36px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

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

.page-contact .pc-faq__q:hover {
  color: var(--c-cyan);
}

.page-contact .pc-faq__q::after {
  content: "+";
  position: absolute;
  top: 15px;
  right: 4px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .pc-faq__item[open] .pc-faq__q::after {
  content: "\2212";
}

.page-contact .pc-faq__a {
  padding: 0 36px 20px 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-haze);
}

.page-contact .pc-faq__a p {
  margin: 0 0 10px;
}

.page-contact .pc-faq__a p:last-child {
  margin-bottom: 0;
}

/* 底部航线带 */
.page-contact .pc-band {
  position: relative;
  margin: 80px 0 0;
  overflow: hidden;
  border: 1px solid var(--hair);
  border-radius: var(--pc-radius);
}

.page-contact .pc-band img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-contact .pc-band__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 16px 20px;
  background: rgba(3, 16, 28, 0.88);
  border-top: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-haze);
}

.page-contact .pc-band__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-contact .pc-band__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
  border-bottom: 1px solid rgba(33, 212, 224, 0.42);
  padding-bottom: 2px;
}

.page-contact .pc-band__links a:hover {
  border-bottom-color: var(--c-cyan);
}

/* 断点 */
@media (min-width: 760px) {
  .page-contact .pc-flow {
    padding: 44px 40px 36px;
  }

  .page-contact .pc-flow__steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .pc-flow__step {
    padding: 24px 22px 24px 0;
    border-bottom: 0;
    border-right: 1px solid var(--ink-hair);
  }

  .page-contact .pc-flow__step + .pc-flow__step {
    padding-left: 22px;
  }

  .page-contact .pc-flow__step:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 860px) {
  .page-contact .pc-coop {
    padding: 52px 44px;
  }

  .page-contact .pc-coop__tabs {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .pc-channels__grid {
    grid-template-columns: 7fr 5fr;
    gap: 36px;
  }

  .page-contact .pc-receipt {
    padding: 30px 26px 26px;
  }

  .page-contact .pc-mail__card {
    grid-template-columns: 1fr 300px;
    align-items: center;
    gap: 32px;
    padding: 40px;
  }

  .page-contact .pc-faq__list {
    grid-template-columns: 1fr 1fr;
    column-gap: 44px;
  }

  .page-contact .pc-band img {
    aspect-ratio: 16 / 6;
  }
}

@media (min-width: 1200px) {
  .page-contact .pc-channels {
    padding-top: 88px;
  }

  .page-contact .pc-coop,
  .page-contact .pc-flow,
  .page-contact .pc-mail,
  .page-contact .pc-faq {
    margin-top: 96px;
  }

  .page-contact .pc-band {
    margin-top: 96px;
  }
}
<<<END>>>