.page-contact {
  --pc-gap: clamp(20px, 3vw, 40px);
  --pc-pad-y: clamp(38px, 5.5vw, 80px);
  --pc-cell: rgba(18, 56, 46, .82);
  background: var(--ink);
  color: var(--sand);
}

.page-contact #channels {
  scroll-margin-top: calc(var(--bar-h) + 16px);
}

/* 面包屑 */
.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--dim);
}

.page-contact .crumbs__link {
  color: var(--gold);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-contact .crumbs__link:hover {
  color: var(--sand);
}

.page-contact .crumbs__sep {
  color: var(--dim-soft);
}

/* 首屏 */
.page-contact .contact-hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 100% at 88% -10%, rgba(102, 199, 217, .12), transparent 62%),
    linear-gradient(180deg, var(--forest) 0%, var(--ink) 84%);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: var(--pc-gap);
  padding: clamp(24px, 4vw, 52px) 0 clamp(34px, 5vw, 72px);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 14em;
  font-size: clamp(38px, 6.4vw, 86px);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--sand);
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 30em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--dim);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .contact-hero__meta {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--dim-soft);
}

.page-contact .contact-hero__media {
  margin: 0;
  border: 1px solid var(--line);
}

/* 区块头 */
.page-contact .block-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
}

.page-contact .block-head--tight {
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.page-contact .block-head__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--sand);
}

.page-contact .block-head__sub {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dim);
}

/* 双栏联络台 */
.page-contact .desk {
  display: grid;
  gap: clamp(30px, 4vw, 60px);
  padding: var(--pc-pad-y) 0 0;
}

.page-contact .desk__aside {
  align-self: start;
}

.page-contact .channel-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.page-contact .channel {
  position: relative;
  padding: 16px 18px 16px 20px;
  background: linear-gradient(180deg, rgba(18, 56, 46, .88), rgba(12, 43, 35, .72));
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  transition: border-color .16s var(--ease), border-left-color .16s var(--ease), transform .16s var(--ease);
}

.page-contact .channel:hover {
  border-color: var(--line-strong);
  border-left-color: var(--orange);
  transform: translateX(2px);
}

.page-contact .channel__key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-contact .channel__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.5;
  color: var(--sand);
  overflow-wrap: anywhere;
  user-select: all;
}

.page-contact .channel__val--addr {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
}

.page-contact .channel__note {
  margin: 9px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-contact .channel__inline {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(102, 199, 217, .4);
}

.page-contact .channel__inline:hover {
  color: var(--sand);
  border-bottom-color: var(--sand);
}

.page-contact .channel__act {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(102, 199, 217, .4);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-contact .channel__act:hover {
  color: var(--sand);
  border-bottom-color: var(--sand);
}

/* 合作类型 */
.page-contact .coop-list {
  margin-top: 6px;
}

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

.page-contact .coop__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-height: 56px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-contact .coop__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-contact .coop__name {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 400;
  color: var(--sand);
  transition: color .16s var(--ease);
}

.page-contact .coop__summary:hover .coop__name {
  color: var(--gold);
}

.page-contact .coop__sign {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  width: 14px;
  height: 14px;
  margin-left: auto;
}

.page-contact .coop__sign::before,
.page-contact .coop__sign::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .18s var(--ease), background .18s var(--ease);
}

.page-contact .coop__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-contact .coop__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-contact .coop[open] .coop__sign::before {
  background: var(--orange);
}

.page-contact .coop[open] .coop__sign::after {
  transform: translateX(-50%) scaleY(0);
}

.page-contact .coop__body {
  padding: 0 0 20px 30px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

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

.page-contact .coop__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

/* 写信准备 */
.page-contact .prep {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  margin-top: clamp(34px, 4.5vw, 60px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--line-strong);
}

.page-contact .prep__list {
  list-style: none;
  counter-reset: prep;
  display: grid;
  gap: 16px;
  margin: 20px 0 0;
  padding: 0;
}

.page-contact .prep__item {
  position: relative;
  padding-left: 42px;
}

.page-contact .prep__item::before {
  counter-increment: prep;
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--orange);
  border: 1px solid var(--line);
}

.page-contact .prep__label {
  display: block;
  font-size: 15px;
  color: var(--sand);
  line-height: 1.6;
}

.page-contact .prep__desc {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-contact .prep__media {
  margin: 0;
  border: 1px solid var(--line);
}

/* 服务时间带 */
.page-contact .hours-band {
  margin-top: var(--pc-pad-y);
  padding: clamp(30px, 4.5vw, 60px) 0;
  background:
    linear-gradient(90deg, rgba(216, 181, 106, .07), transparent 55%),
    var(--forest);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .hours {
  display: grid;
  gap: 1px;
  margin-top: 22px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .hours__cell {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  background: var(--pc-cell);
}

.page-contact .hours__num {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 26px);
  letter-spacing: -.01em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-contact .hours__lbl {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--dim);
}

.page-contact .hours__note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--dim-soft);
}

/* 常见问题入口 */
.page-contact .route-outs {
  padding: var(--pc-pad-y) 0 clamp(44px, 6vw, 88px);
}

.page-contact .route-outs__list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

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

.page-contact .route-out__link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  min-height: 56px;
  padding: 17px 0;
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-contact .route-out__q {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--sand);
  transition: color .16s var(--ease);
}

.page-contact .route-out__go {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ice);
}

.page-contact .route-out__link:hover .route-out__q {
  color: var(--gold);
}

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

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

@media (min-width: 760px) {
  .page-contact .prep {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr);
    align-items: end;
  }

  .page-contact .desk {
    grid-template-columns: minmax(0, 4.6fr) minmax(0, 7.4fr);
    align-items: start;
  }

  .page-contact .desk__aside {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

  .page-contact .hours {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 559px) {
  .page-contact .coop__body {
    padding-left: 0;
  }

  .page-contact .contact-hero__actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel__act,
  .page-contact .coop__name,
  .page-contact .coop__sign::before,
  .page-contact .coop__sign::after,
  .page-contact .route-out__q {
    transition: none;
  }

  .page-contact .channel:hover {
    transform: none;
  }
}
<<<END>>>