.page-contact {
  --contact-edge: rgba(14, 42, 71, .16);
  --contact-shadow: 0 18px 44px rgba(7, 26, 43, .16);
}

.page-contact .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  font-size: .8125rem;
}

.page-contact .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--salt);
}

.page-contact .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: rgba(155, 170, 184, .6);
}

.page-contact .breadcrumbs__link {
  color: rgba(247, 244, 239, .78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .breadcrumbs__link:hover,
.page-contact .breadcrumbs__link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--coral);
}

.page-contact .mono-text {
  font-family: var(--mono);
  letter-spacing: .02em;
  word-break: break-word;
}

/* ---------- 首屏服务台 ---------- */
.page-contact .desk {
  background:
    radial-gradient(120% 90% at 88% 10%, rgba(61, 110, 143, .42) 0%, rgba(61, 110, 143, 0) 58%),
    linear-gradient(168deg, var(--deep) 0%, var(--reef) 100%);
  color: var(--mist);
  padding: 2.4rem 0 3.4rem;
  position: relative;
  overflow: hidden;
}

.page-contact .desk::after {
  content: "";
  position: absolute;
  inset: auto -10% -40% 45%;
  height: 320px;
  background: radial-gradient(closest-side, rgba(216, 166, 87, .18), transparent 72%);
  pointer-events: none;
}

.page-contact .desk .eyebrow {
  color: var(--gold);
  margin: 0 0 .9rem;
}

.page-contact .desk__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.2rem;
  position: relative;
  z-index: 1;
}

.page-contact .desk h1 {
  font-family: var(--serif);
  font-size: 2.05rem;
  line-height: 1.28;
  letter-spacing: .06em;
  margin: 0 0 1rem;
  color: var(--paper);
  max-width: 16em;
}

.page-contact .desk__intro {
  margin: 0 0 1.8rem;
  font-size: .9375rem;
  line-height: 1.85;
  color: rgba(247, 244, 239, .82);
  max-width: 34em;
}

.page-contact .mailcard {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--contact-edge);
  border-radius: 2px;
  padding: 1.4rem 1.2rem 1.3rem;
  box-shadow: var(--contact-shadow);
}

.page-contact .mailcard::before {
  content: "";
  position: absolute;
  inset: 8px -8px -8px 8px;
  border: 1px solid rgba(216, 166, 87, .45);
  border-radius: 2px;
  z-index: -1;
}

.page-contact .mailcard__head {
  display: block;
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--tide);
  margin: 0 0 1rem;
  padding-bottom: .7rem;
  border-bottom: 1px dashed var(--contact-edge);
}

.page-contact .mailcard__rows {
  margin: 0;
  display: grid;
  gap: .85rem;
}

.page-contact .mailcard__row {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: .6rem;
  align-items: baseline;
}

.page-contact .mailcard__k {
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--tide);
}

.page-contact .mailcard__v {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--ink);
}

.page-contact .mailcard__row:nth-child(-n+2) .mailcard__v {
  color: var(--deep);
  font-weight: 600;
  font-size: 1rem;
}

.page-contact .mailcard__note {
  margin: 1.1rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid rgba(14, 42, 71, .1);
  font-size: .8125rem;
  line-height: 1.75;
  color: #4a5560;
}

.page-contact .desk__side {
  display: grid;
  gap: 1.2rem;
  align-content: start;
}

.page-contact .desk__figure {
  margin: 0;
}

.page-contact .desk__figure .media__frame {
  border: 1px solid rgba(247, 244, 239, .18);
  box-shadow: 14px 14px 0 rgba(216, 166, 87, .16);
  overflow: hidden;
}

.page-contact .desk__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.86);
}

.page-contact .desk__figure .media__caption {
  margin-top: .7rem;
  font-size: .75rem;
  letter-spacing: .06em;
  color: rgba(247, 244, 239, .58);
}

.page-contact .desk__tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-contact .sortag {
  display: inline-block;
  padding: .35rem .7rem;
  font-size: .75rem;
  letter-spacing: .06em;
  color: rgba(247, 244, 239, .8);
  border: 1px solid rgba(155, 170, 184, .45);
  border-radius: 999px;
}

.page-contact .sortag--coral {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--deep);
  font-weight: 600;
}

.page-contact .sortag--gold {
  background: rgba(216, 166, 87, .16);
  border-color: rgba(216, 166, 87, .62);
  color: var(--gold);
}

/* ---------- 通用章节 ---------- */
.page-contact .section {
  padding: 3rem 0;
}

.page-contact .section__head h2,
.page-contact .prep__aside h2,
.page-contact .coop__body h2,
.page-contact .addr h2 {
  font-family: var(--serif);
  letter-spacing: .06em;
  line-height: 1.35;
  margin: 0 0 .9rem;
}

.page-contact .section__head .eyebrow,
.page-contact .prep__aside .eyebrow,
.page-contact .coop__body .eyebrow,
.page-contact .addr .eyebrow {
  margin: 0 0 .7rem;
  color: var(--tide);
}

/* ---------- 来信分拣 ---------- */
.page-contact .triage {
  background: var(--mist);
}

.page-contact .triage .section__head {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.page-contact .triage .section__head h2 {
  font-size: 1.6rem;
  color: var(--deep);
}

.page-contact .triage__lead {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: #4a5560;
}

.page-contact .triage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

.page-contact .triage__card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--contact-edge);
  border-top: 3px solid var(--tide);
  padding: 1.5rem 1.2rem 1.3rem;
  box-shadow: 0 10px 24px rgba(7, 26, 43, .07);
  display: flex;
  flex-direction: column;
  gap: .8rem;
}

.page-contact .triage__card::after {
  content: "";
  position: absolute;
  right: 1.1rem;
  top: 1.1rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tide);
  opacity: .55;
}

.page-contact .triage__card--coral {
  border-top-color: var(--coral);
}

.page-contact .triage__card--coral::after {
  background: var(--coral);
}

.page-contact .triage__card--gold {
  border-top-color: var(--gold);
}

.page-contact .triage__card--gold::after {
  background: var(--gold);
}

.page-contact .triage__card h3 {
  font-family: var(--serif);
  font-size: 1.1875rem;
  letter-spacing: .05em;
  color: var(--deep);
  margin: .2rem 0 0;
  padding-right: 1.4rem;
}

.page-contact .triage__card p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.8;
  color: #3f4a54;
}

.page-contact .triage__card .tag {
  align-self: flex-start;
  font-size: .6875rem;
  letter-spacing: .14em;
  padding: .25rem .6rem;
  border-radius: 2px;
  font-family: var(--mono);
  background: rgba(61, 110, 143, .12);
  color: var(--night);
}

.page-contact .triage__card .tag--coral {
  background: rgba(240, 138, 138, .2);
  color: #8f3535;
}

.page-contact .triage__card .tag--gold {
  background: rgba(216, 166, 87, .22);
  color: #7d5a17;
}

.page-contact .triage__card .tag--tide {
  background: rgba(61, 110, 143, .16);
  color: var(--night);
}

.page-contact .triage__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .45rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: #4a5560;
}

.page-contact .triage__list li {
  position: relative;
  padding-left: 1rem;
}

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

.page-contact .triage__go {
  margin-top: auto;
  padding-top: .8rem;
  border-top: 1px solid rgba(14, 42, 71, .1);
  font-size: .8125rem;
}

.page-contact .triage__go a {
  color: var(--night);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 110, 143, .45);
  padding-bottom: 1px;
}

.page-contact .triage__go a:hover,
.page-contact .triage__go a:focus-visible {
  color: var(--deep);
  border-bottom-color: var(--coral);
}

/* ---------- 准备清单 ---------- */
.page-contact .prep {
  background: var(--paper);
}

.page-contact .prep__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
}

.page-contact .prep__aside h2 {
  font-size: 1.55rem;
  color: var(--deep);
}

.page-contact .prep__aside p {
  margin: 0 0 1.2rem;
  font-size: .9375rem;
  line-height: 1.85;
  color: #4a5560;
  max-width: 26em;
}

.page-contact .prep__jump {
  display: inline-block;
}

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

.page-contact .prep__item {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: .8rem;
  padding: 1.1rem 0;
  border-top: 1px solid rgba(14, 42, 71, .12);
}

.page-contact .prep__item:last-child {
  border-bottom: 1px solid rgba(14, 42, 71, .12);
}

.page-contact .prep__idx {
  font-size: .8125rem;
  color: var(--gold);
  letter-spacing: .1em;
  padding-top: .2rem;
}

.page-contact .prep__item h3 {
  margin: 0 0 .35rem;
  font-family: var(--serif);
  font-size: 1.0625rem;
  letter-spacing: .04em;
  color: var(--night);
}

.page-contact .prep__item p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.8;
  color: #4a5560;
}

/* ---------- 合作 ---------- */
.page-contact .coop {
  background: linear-gradient(180deg, var(--mist) 0%, #eef0ee 100%);
}

.page-contact .coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
}

.page-contact .coop__figure {
  margin: 0;
}

.page-contact .coop__figure .media__frame {
  border: 1px solid var(--contact-edge);
  box-shadow: -14px 14px 0 rgba(61, 110, 143, .14);
  overflow: hidden;
}

.page-contact .coop__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .coop__figure .media__caption {
  margin-top: .7rem;
  font-size: .75rem;
  color: #6b7885;
}

.page-contact .coop__body h2 {
  font-size: 1.55rem;
  color: var(--deep);
}

.page-contact .coop__body p {
  margin: 0 0 1rem;
  font-size: .9375rem;
  line-height: 1.85;
  color: #3f4a54;
  max-width: 34em;
}

.page-contact .coop__details {
  border: 1px solid var(--contact-edge);
  background: var(--paper);
  padding: .9rem 1rem;
  margin-bottom: .8rem;
}

.page-contact .coop__details summary {
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: .05em;
  color: var(--night);
  list-style: none;
}

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

.page-contact .coop__details summary::before {
  content: "+";
  display: inline-block;
  width: 1.1rem;
  color: var(--coral);
  font-family: var(--mono);
}

.page-contact .coop__details[open] summary::before {
  content: "−";
}

.page-contact .coop__details summary:focus-visible {
  outline: 2px solid var(--tide);
  outline-offset: 3px;
}

.page-contact .coop__materials {
  margin: .8rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: .45rem;
  font-size: .875rem;
  line-height: 1.75;
  color: #4a5560;
}

.page-contact .coop__details p {
  margin: .8rem 0 0;
  font-size: .875rem;
  line-height: 1.8;
  color: #4a5560;
}

.page-contact .coop__mail {
  margin: .4rem 0 0;
  padding: .8rem 1rem;
  background: rgba(216, 166, 87, .14);
  border-left: 3px solid var(--gold);
  font-size: .875rem;
  color: var(--night);
}

/* ---------- 地址窄栏 ---------- */
.page-contact .addr {
  background: var(--night);
  color: var(--mist);
  padding: 2.8rem 0 3.2rem;
}

.page-contact .addr__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
}

.page-contact .addr .eyebrow {
  color: rgba(240, 138, 138, .9);
}

.page-contact .addr h2 {
  font-size: 1.5rem;
  color: var(--paper);
  margin-bottom: .8rem;
}

.page-contact .addr__line {
  margin: 0 0 .9rem;
  font-size: 1rem;
  color: var(--gold);
  letter-spacing: .04em;
}

.page-contact .addr__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.85;
  color: rgba(247, 244, 239, .78);
  max-width: 36em;
}

.page-contact .addr__side {
  border-top: 1px solid rgba(247, 244, 239, .16);
  padding-top: 1.4rem;
}

.page-contact .addr__facts {
  margin: 0 0 1.2rem;
  display: grid;
  gap: .8rem;
}

.page-contact .addr__fact {
  display: grid;
  gap: .2rem;
}

.page-contact .addr__fact dt {
  font-size: .6875rem;
  letter-spacing: .16em;
  color: rgba(155, 170, 184, .9);
  font-family: var(--mono);
}

.page-contact .addr__fact dd {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: rgba(247, 244, 239, .88);
}

.page-contact .addr__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0 0 1.2rem;
  font-size: .8125rem;
}

.page-contact .addr__links a {
  color: rgba(247, 244, 239, .72);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 166, 87, .5);
  padding-bottom: 2px;
}

.page-contact .addr__links a:hover,
.page-contact .addr__links a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--coral);
}

.page-contact .back-top {
  appearance: none;
  cursor: pointer;
  background: transparent;
  border: 1px solid rgba(247, 244, 239, .34);
  color: var(--paper);
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .16em;
  padding: .55rem 1rem;
  border-radius: 2px;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-contact .back-top:hover,
.page-contact .back-top:focus-visible {
  background: rgba(240, 138, 138, .18);
  border-color: var(--coral);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

@media (min-width: 640px) {
  .page-contact .desk {
    padding: 3rem 0 4rem;
  }

  .page-contact .desk h1 {
    font-size: 2.5rem;
  }

  .page-contact .mailcard {
    padding: 1.6rem 1.6rem 1.5rem;
  }

  .page-contact .mailcard__row {
    grid-template-columns: 6rem 1fr;
  }

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

  .page-contact .addr__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.6rem;
  }
}

@media (min-width: 960px) {
  .page-contact .desk {
    padding: 3.2rem 0 4.6rem;
  }

  .page-contact .desk__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 3.2rem;
    align-items: start;
  }

  .page-contact .desk h1 {
    font-size: 3.25rem;
    line-height: 1.24;
  }

  .page-contact .desk__intro {
    font-size: 1rem;
  }

  .page-contact .desk__figure .media--wide {
    aspect-ratio: 4 / 3;
  }

  .page-contact .desk__figure .media__img {
    height: 100%;
  }

  .page-contact .triage__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-contact .triage .section__head h2 {
    font-size: 2rem;
  }

  .page-contact .prep__grid {
    grid-template-columns: minmax(0, 29%) minmax(0, 1fr);
    gap: 3rem;
  }

  .page-contact .prep__aside {
    position: sticky;
    top: 6rem;
    align-self: start;
  }

  .page-contact .prep__aside h2 {
    font-size: 1.9rem;
  }

  .page-contact .prep__item {
    grid-template-columns: 3rem 1fr;
    padding: 1.3rem 0;
  }

  .page-contact .coop__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 3rem;
    align-items: start;
  }

  .page-contact .coop__body h2 {
    font-size: 1.9rem;
  }

  .page-contact .addr__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 3rem;
    align-items: start;
  }

  .page-contact .addr__side {
    border-top: 0;
    border-left: 1px solid rgba(247, 244, 239, .16);
    padding-top: 0;
    padding-left: 2rem;
  }

  .page-contact .addr__facts {
    grid-template-columns: 1fr;
  }

  .page-contact .addr h2 {
    font-size: 2rem;
  }
}