.page-contact {
  --pc-hair: 1px solid var(--c-grid);
  --pc-ink-soft: rgba(26, 21, 18, 0.78);
  background-color: var(--c-night);
  color: var(--c-cream);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: calc(var(--header-h) + clamp(34px, 6vw, 84px));
  padding-bottom: clamp(44px, 6vw, 88px);
  border-bottom: var(--pc-hair);
}

.page-contact .contact-hero__crumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .contact-hero__crumbs .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-silver);
}

.page-contact .contact-hero__crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-contact .contact-hero__crumbs li + li::before {
  content: "";
  width: 18px;
  height: 1px;
  background-color: var(--c-grid);
}

.page-contact .contact-hero__crumbs a {
  color: var(--c-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .contact-hero__crumbs a:hover,
.page-contact .contact-hero__crumbs a:focus-visible {
  color: var(--c-signal-soft);
  border-bottom-color: var(--c-line);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-contact .contact-hero__col {
  min-width: 0;
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--c-cream);
}

.page-contact .contact-hero__lead {
  margin: 22px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.82);
}

.page-contact .hero-facts {
  display: grid;
  grid-template-columns: 1fr;
  margin: 30px 0 0;
  border-top: var(--pc-hair);
}

.page-contact .hero-facts__item {
  padding: 14px 0;
  border-bottom: var(--pc-hair);
}

.page-contact .hero-facts dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.page-contact .hero-facts dd {
  margin: 9px 0 0;
  font-size: 17px;
  color: var(--c-score);
}

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

/* ---------- 两条通道 ---------- */
.page-contact .contact-channels__head {
  margin-bottom: clamp(24px, 3vw, 38px);
}

.page-contact .contact-channels h2,
.page-contact .contact-coop h2,
.page-contact .contact-origin h2,
.page-contact .contact-outro h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

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

.page-contact .channel {
  padding: clamp(24px, 4vw, 38px) clamp(16px, 3vw, 30px);
  border-bottom: var(--pc-hair);
  transition: background-color var(--t-base) var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  background-color: var(--c-pitch);
}

.page-contact .channel__kind {
  display: flex;
  align-items: center;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.page-contact .channel--mail .channel__kind {
  color: var(--c-signal-soft);
}

.page-contact .channel--mail .channel__kind::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 2px;
  margin-right: 9px;
  background-color: var(--c-signal);
}

.page-contact .channel__name {
  margin: 14px 0 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-cream);
}

.page-contact .channel__value {
  margin: 16px 0 0;
  font-size: clamp(17px, 3.6vw, 26px);
  line-height: 1.3;
  color: var(--c-score);
  overflow-wrap: anywhere;
}

.page-contact .channel__desc {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.78);
}

.page-contact .channel__list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-silver);
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background-color: var(--c-line);
}

/* ---------- 邮件要素（奶油纸面） ---------- */
.page-contact .contact-brief {
  border-top: var(--pc-hair);
  border-bottom: var(--pc-hair);
}

.page-contact .contact-brief .label {
  color: rgba(26, 21, 18, 0.6);
}

.page-contact .contact-brief h2 {
  color: var(--c-lead);
}

.page-contact .contact-brief__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-contact .contact-brief__body {
  min-width: 0;
}

.page-contact .contact-brief__intro {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(26, 21, 18, 0.86);
}

.page-contact .brief-list {
  margin: clamp(26px, 3vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(26, 21, 18, 0.18);
}

.page-contact .brief-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0 14px;
  padding: 20px 4px;
  border-bottom: 1px solid rgba(26, 21, 18, 0.18);
  transition: background-color var(--t-base) var(--ease);
}

.page-contact .brief-item:hover {
  background-color: rgba(31, 92, 66, 0.08);
}

.page-contact .brief-item__no {
  padding-top: 4px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-line);
}

.page-contact .brief-item__text h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-lead);
}

.page-contact .brief-item__text p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--pc-ink-soft);
}

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

/* ---------- 合作与接口 ---------- */
.page-contact .contact-coop {
  border-bottom: var(--pc-hair);
}

.page-contact .contact-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
}

.page-contact .contact-coop__body {
  min-width: 0;
}

.page-contact .contact-coop__body > p {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.8);
}

.page-contact .coop-list {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair);
}

.page-contact .coop-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--pc-hair);
}

.page-contact .coop-list__k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-silver);
}

.page-contact .coop-list__v {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.86);
}

/* ---------- 通信地址与备案 ---------- */
.page-contact .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: clamp(22px, 3vw, 34px);
  border-top: var(--pc-hair);
}

.page-contact .origin-block {
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: var(--pc-hair);
  min-width: 0;
}

.page-contact .origin-block__k {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-silver);
}

.page-contact .origin-block__v {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-cream);
  overflow-wrap: anywhere;
}

.page-contact .origin-block__note {
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-silver);
}

.page-contact .origin-more {
  margin-top: 18px;
  border-top: 1px solid var(--c-grid);
}

.page-contact .origin-more summary {
  display: flex;
  align-items: center;
  padding: 12px 0;
  list-style: none;
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-signal-soft);
  transition: color var(--t-fast) var(--ease);
}

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

.page-contact .origin-more summary::after {
  content: "＋";
  margin-left: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
}

.page-contact .origin-more[open] summary::after {
  content: "－";
}

.page-contact .origin-more summary:hover,
.page-contact .origin-more summary:focus-visible {
  color: var(--c-cream);
}

.page-contact .origin-more__line {
  margin: 0 0 8px;
  padding: 14px 16px;
  background-color: var(--c-pitch);
  border-left: 2px solid var(--c-line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-score);
  overflow-wrap: anywhere;
}

/* ---------- 收尾索引 ---------- */
.page-contact .contact-outro {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-contact .contact-outro__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3vw, 44px);
}

.page-contact .contact-outro__inner > div {
  min-width: 0;
}

.page-contact .contact-outro__inner > div > p {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 235, 221, 0.78);
}

.page-contact .outro-links {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair);
}

.page-contact .outro-link {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 6px;
  border-bottom: var(--pc-hair);
  text-decoration: none;
  transition: background-color var(--t-base) var(--ease), padding-left var(--t-base) var(--ease);
}

.page-contact .outro-link:hover,
.page-contact .outro-link:focus-visible {
  background-color: var(--c-pitch);
  padding-left: 16px;
}

.page-contact .outro-link__k {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-cream);
}

.page-contact .outro-link__v {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-silver);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-contact .hero-facts {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .hero-facts__item + .hero-facts__item {
    padding-left: 22px;
    border-left: var(--pc-hair);
  }

  .page-contact .coop-list li {
    grid-template-columns: 132px 1fr;
    gap: 0 24px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-contact .channel-grid {
    grid-template-columns: 6fr 5fr;
  }

  .page-contact .channel--mail {
    padding-left: 0;
  }

  .page-contact .channel--phone {
    border-left: var(--pc-hair);
  }
}

@media (min-width: 920px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(36px, 5vw, 76px);
  }

  .page-contact .contact-brief__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-contact .contact-coop__grid {
    grid-template-columns: 4fr 8fr;
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-contact .origin-block:nth-child(2) {
    padding-left: clamp(24px, 3vw, 44px);
    border-left: var(--pc-hair);
  }

  .page-contact .contact-outro__inner {
    grid-template-columns: 5fr 7fr;
    gap: clamp(30px, 4vw, 60px);
  }
}