.page-contact {
  --contact-gap: clamp(1.6rem, 4vw, 3rem);
  --contact-ink-soft: rgba(24, 15, 46, 0.72);
}

/* ---------- 面包屑与首屏 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.8rem);
}

.page-contact .contact-hero {
  padding-top: clamp(1.4rem, 4vw, 2.6rem);
}

.page-contact .contact-hero__title {
  margin: 0.35em 0 0.3em;
  font-size: clamp(2.3rem, 8.4vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .contact-hero__lede {
  max-width: 38em;
  margin: 0;
}

.page-contact .contact-hero__media {
  position: relative;
  margin: clamp(1.8rem, 5vw, 3.2rem) 0 0;
  border: 1px solid var(--line);
  background: var(--board);
  overflow: hidden;
}

.page-contact .contact-hero__media .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-contact .media__watermark {
  position: absolute;
  right: clamp(0.8rem, 2vw, 1.4rem);
  bottom: clamp(0.6rem, 2vw, 1.1rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--paper);
  opacity: 0.72;
  pointer-events: none;
}

/* ---------- 通用标题 ---------- */
.page-contact h2 {
  margin: 0 0 0.7em;
  font-size: clamp(1.5rem, 3.6vw, 2.7rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact h3 {
  margin: 0 0 0.5em;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--paper);
}

/* ---------- 两条通道 ---------- */
.page-contact .contact-channels .section-title {
  max-width: 24em;
}

.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .channel {
  padding: clamp(1.6rem, 5vw, 2.6rem) 0;
  min-width: 0;
}

.page-contact .channel + .channel {
  border-top: 1px solid var(--line);
}

.page-contact .channel__label {
  margin: 0 0 1em;
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  color: var(--violet);
}

.page-contact .channel__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1rem, 3.6vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-decoration: none;
  overflow-wrap: anywhere;
  padding-bottom: 0.55em;
  border-bottom: 1px solid var(--line);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-contact .channel__value--tel {
  font-size: clamp(1.6rem, 6vw, 2.6rem);
  letter-spacing: 0.01em;
}

.page-contact .channel__value:hover,
.page-contact .channel__value:focus-visible {
  color: var(--odds);
  border-bottom-color: var(--odds);
}

.page-contact .channel__desc {
  margin: 1.2em 0 1.2em;
  max-width: 34em;
  color: var(--ash);
  line-height: 1.75;
  font-size: 0.97rem;
}

.page-contact .channel__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.92rem;
  color: var(--paper);
  opacity: 0.86;
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.5rem;
  height: 1px;
  background: var(--turf);
}

/* ---------- 填写提示 ---------- */
.page-contact .brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  align-items: start;
}

.page-contact .brief-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--board);
  overflow: hidden;
}

.page-contact .brief-figure .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .brief-body .prose {
  margin: 0 0 1.6em;
  color: var(--ash);
}

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

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .checklist__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--violet);
  padding-top: 0.35em;
}

.page-contact .checklist__title {
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
  transition: color 0.22s var(--ease);
}

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

.page-contact .checklist__title::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--amber);
  line-height: 1;
}

.page-contact details[open] > .checklist__title::after {
  content: "–";
}

.page-contact .checklist__title:hover,
.page-contact .checklist__title:focus-visible {
  color: var(--odds);
}

.page-contact .checklist__body {
  margin: 0.6em 0 0;
  max-width: 40em;
  color: var(--ash);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ---------- 共建 ---------- */
.page-contact .contact-collab__lede {
  max-width: 42em;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .collab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

.page-contact .collab-steps > li {
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-contact .collab-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--odds);
  margin-bottom: 0.55rem;
}

.page-contact .collab-steps p {
  margin: 0;
  max-width: 32em;
  color: var(--ash);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-contact .materials {
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
  padding-top: 1rem;
}

.page-contact .materials__title {
  margin: 0 0 0.9em;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-contact .materials__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
}

.page-contact .materials__list li {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--board);
  font-size: 0.86rem;
  color: var(--paper);
  opacity: 0.9;
}

/* ---------- 地址 ---------- */
.page-contact .address-panel {
  padding: clamp(1.6rem, 5vw, 3.4rem);
  border-radius: 2px;
  color: var(--ink-on-paper);
}

.page-contact .address-panel h2 {
  color: var(--ink-on-paper);
}

.page-contact .eyebrow--dark {
  color: var(--violet-deep);
}

.page-contact .eyebrow--dark::before {
  background: var(--odds);
}

.page-contact .address-line {
  margin: 0 0 0.5em;
  font-size: clamp(1.2rem, 4.4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--ink-on-paper);
}

.page-contact .address-note {
  margin: 0;
  max-width: 34em;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--contact-ink-soft);
}

/* ---------- 后续 ---------- */
.page-contact .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  align-items: start;
}

.page-contact .next-head .prose {
  margin: 0;
  color: var(--ash);
}

.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .flow li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .flow__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--turf);
  padding-top: 0.3em;
}

.page-contact .flow p {
  margin: 0;
  max-width: 40em;
  color: var(--paper);
  font-size: 0.97rem;
  line-height: 1.7;
  opacity: 0.9;
}

.page-contact .next-links {
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.page-contact .next-links p {
  margin: 0;
  max-width: 44em;
  color: var(--ash);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-contact .next-links a {
  color: var(--violet);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-contact .next-links a:hover,
.page-contact .next-links a:focus-visible {
  color: var(--odds);
  border-bottom-color: var(--odds);
}

/* ---------- 页尾一行 ---------- */
.page-contact .contact-legal {
  margin: clamp(3rem, 9vw, 5.5rem) 0 clamp(2rem, 5vw, 3rem);
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ash);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .collab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .collab-steps > li {
    padding: 1.6rem 1.5rem;
    border-bottom: none;
    border-left: 1px solid var(--line);
  }

  .page-contact .collab-steps > li:first-child {
    border-left: none;
    padding-left: 0;
  }
}

@media (min-width: 880px) {
  .page-contact .channels {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-contact .channel {
    padding: clamp(1.8rem, 4vw, 3rem) clamp(1.4rem, 3vw, 2.4rem);
  }

  .page-contact .channel + .channel {
    border-top: none;
    border-left: 1px solid var(--line);
  }

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

  .page-contact .channel:last-child {
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .brief-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-contact .next-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }
}