.page-contact {
  background: var(--color-surface);
  color: var(--color-ink);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-intro {
  padding-block: var(--space-4) var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-block-start: var(--space-4);
}

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

.page-contact .contact-intro__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin-block: var(--space-2) 0;
  overflow-wrap: anywhere;
}

.page-contact .contact-intro__text {
  max-width: var(--measure);
  margin-block-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-intro__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  margin: var(--space-4) 0 0;
  padding-block-start: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-contact .contact-intro__meta dt {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-contact .contact-intro__meta dd {
  margin: var(--space-1) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
  padding-block-end: 2px;
}

.page-contact .contact-intro__figure {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 11;
  object-fit: cover;
}

/* ---------- 四条路径 ---------- */

.page-contact .contact-channels {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  margin-block-start: var(--space-6);
}

.page-contact .contact-channel {
  background: var(--color-surface);
  min-width: 0;
}

.page-contact .contact-channel[open] {
  background: var(--color-surface-deep);
}

.page-contact .contact-channel__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-3);
  min-height: 44px;
  position: relative;
  padding-inline-end: var(--space-6);
}

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

.page-contact .contact-channel__summary::after {
  content: "+";
  position: absolute;
  inset-block-start: var(--space-3);
  inset-inline-end: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-ink-muted);
}

.page-contact .contact-channel[open] .contact-channel__summary::after {
  content: "−";
  color: var(--color-primary);
}

.page-contact .contact-channel__index {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-contact .contact-channel__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-contact .contact-channel__fit {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-channel__body {
  padding: 0 var(--space-3) var(--space-3);
  margin-block-start: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  padding-block-start: var(--space-2);
}

.page-contact .contact-channel__body p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 邮箱与电话 ---------- */

.page-contact .contact-direct__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-contact .contact-direct__lead h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin-block: var(--space-2) 0;
}

.page-contact .contact-direct__lead p {
  max-width: var(--measure);
  margin-block-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-direct__ways {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-line);
  border-block: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-way {
  background: var(--color-surface);
  padding-block: var(--space-6);
  min-width: 0;
}

.page-contact .contact-way__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.page-contact .contact-way__value {
  display: inline-block;
  margin-block: var(--space-2) 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
  padding-block-end: 2px;
  word-break: break-all;
}

.page-contact .contact-way__desc {
  max-width: var(--measure);
  margin-block-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-way__note {
  margin-block-start: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 通信地址 ---------- */

.page-contact .contact-address .contact-address__kicker {
  color: var(--color-contrast-accent);
}

.page-contact .contact-address h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin-block: var(--space-2) 0;
}

.page-contact .contact-address__figure {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-contact .contact-address__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
  filter: grayscale(1);
  opacity: 0.4;
}

.page-contact .contact-address__body {
  margin-block-start: var(--space-4);
  padding-block-start: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-contact .contact-address__line {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thick) solid var(--color-contrast-accent);
  display: inline-block;
  padding-block-end: 2px;
}

.page-contact .contact-address__desc {
  max-width: var(--measure);
  margin-block-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-contact .contact-address__icp {
  margin-block-start: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-contrast-line);
}

/* ---------- 五项信息清单 ---------- */

.page-contact .contact-ready__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-ready__item {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-ready__label {
  display: grid;
  grid-template-columns: 20px auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-1) var(--space-2);
  align-items: baseline;
  padding-block: var(--space-3);
  min-height: 44px;
  cursor: pointer;
}

.page-contact .contact-ready__box {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  width: 20px;
  height: 20px;
  margin: 4px 0 0;
  accent-color: var(--color-primary);
}

.page-contact .contact-ready__num {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-contact .contact-ready__name {
  grid-column: 3;
  grid-row: 1;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  overflow-wrap: anywhere;
}

.page-contact .contact-ready__hint {
  grid-column: 2 / -1;
  grid-row: 2;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-ready__box:checked ~ .contact-ready__name {
  color: var(--color-ink-muted);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

.page-contact .contact-ready__box:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 收尾行动出口 ---------- */

.page-contact .contact-next {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-contact .contact-next__lead h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.page-contact .contact-next__lead p {
  max-width: var(--measure);
  margin-block-start: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-contact .contact-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-next__links li {
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-contact .contact-next__link {
  position: relative;
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-decoration: none;
}

.page-contact .contact-next__link::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-end: -4px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 120ms linear;
}

.page-contact .contact-next__link:hover::after,
.page-contact .contact-next__link:focus-visible::after {
  width: 100%;
}

.page-contact .contact-next__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}

.page-contact .contact-next__more {
  display: block;
  margin-block-start: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 中等屏幕 ---------- */

@media (min-width: 768px) {
  .page-contact .contact-intro__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
    gap: var(--space-6);
    align-items: start;
  }

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

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

  .page-contact .contact-ready__label {
    grid-template-columns: 20px auto 12rem minmax(0, 1fr);
    grid-template-rows: auto;
    align-items: center;
  }

  .page-contact .contact-ready__box {
    grid-row: 1;
    align-self: center;
    margin-block-start: 0;
  }

  .page-contact .contact-ready__num {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .contact-ready__name {
    grid-column: 3;
    grid-row: 1;
  }

  .page-contact .contact-ready__hint {
    grid-column: 4;
    grid-row: 1;
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 960px) {
  .page-contact .contact-intro {
    padding-block: var(--space-6) var(--section-y);
  }

  .page-contact .contact-intro__title {
    font-size: var(--text-3xl);
  }

  .page-contact .contact-channels__grid {
    grid-template-columns: 1.35fr 1.15fr 1fr 1.3fr;
  }

  .page-contact .contact-direct__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-8);
  }

  .page-contact .contact-next__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
  }

  .page-contact .contact-address h2,
  .page-contact .contact-direct__lead h2,
  .page-contact .contact-next__lead h2 {
    font-size: var(--text-2xl);
  }
}