.page-contact {
  --contact-lead-max: 46ch;
}

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}

.page-contact .contact-hero__lead h1 {
  margin: 0.65rem 0 1rem;
  max-width: 20ch;
}

.page-contact .contact-hero__lede {
  margin: 0 0 1.7rem;
  max-width: var(--contact-lead-max);
  color: var(--c-cool);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-contact .contact-hero__panel {
  padding: clamp(1.15rem, 2.6vw, 1.6rem);
}

.page-contact .quick-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.page-contact .quick-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 0.9rem;
}

.page-contact .quick-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .quick-list span:first-child {
  flex: 0 0 auto;
  color: var(--c-cool);
}

.page-contact .quick-list a {
  color: var(--c-mint);
  text-decoration: none;
  text-align: right;
  word-break: break-all;
  transition: color 0.2s var(--ease);
}

.page-contact .quick-list a:hover,
.page-contact .quick-list a:focus-visible {
  color: var(--c-paper);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-note {
  margin: 0 0 1.4rem;
  max-width: 68ch;
  color: var(--c-cool);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-contact .coop-note a {
  color: var(--c-mint);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mint);
}

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

.page-contact .coop-grid {
  margin-top: 1.6rem;
}

.page-contact .coop-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: clamp(1.15rem, 2.4vw, 1.6rem);
  border-left: 3px solid var(--c-mint);
}

.page-contact .coop-card h3 {
  margin: 0;
  color: var(--c-ink);
  font-size: var(--fs-h3);
}

.page-contact .coop-card p {
  margin: 0;
  color: rgba(10, 20, 32, 0.78);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-contact .coop-list {
  list-style: none;
  margin: auto 0 0;
  padding: 0.85rem 0 0;
  border-top: 1px solid rgba(10, 20, 32, 0.14);
  display: grid;
  gap: 0.45rem;
  font-size: 0.85rem;
}

.page-contact .coop-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  color: rgba(10, 20, 32, 0.6);
}

.page-contact .coop-list .mono {
  color: var(--c-ink);
  font-weight: 600;
}

.page-contact .coop-figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-contact .channel-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .channel-item {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .channel-item__value {
  display: block;
  margin: 0.5rem 0 0.4rem;
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  line-height: 1.35;
  color: var(--c-mint);
  text-decoration: none;
  word-break: break-all;
  transition: color 0.2s var(--ease);
}

.page-contact a.channel-item__value:hover,
.page-contact a.channel-item__value:focus-visible {
  color: var(--c-paper);
}

.page-contact .channel-item__value--plain {
  color: var(--c-paper);
}

.page-contact .channel-item__note {
  margin: 0;
  max-width: 52ch;
  color: var(--c-cool);
  font-size: 0.9rem;
  line-height: 1.75;
}

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

.page-contact .channels__figure .figure__media {
  aspect-ratio: 10 / 7;
}

/* ---------- 合作流程 ---------- */
.page-contact .flow {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-contact .flow__step {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding: clamp(1.1rem, 2.6vw, 1.75rem);
  background: var(--c-ink);
}

.page-contact .flow__num {
  color: var(--c-mint);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
}

.page-contact .flow__step h3 {
  margin: 0;
  color: var(--c-paper);
  font-size: var(--fs-h3);
}

.page-contact .flow__step p {
  margin: 0;
  color: var(--c-cool);
  font-size: 0.94rem;
  line-height: 1.75;
}

/* ---------- 响应说明 ---------- */
.page-contact .response__band {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.5rem);
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
}

.page-contact .response__time {
  display: block;
  margin: 0.55rem 0 0;
  font-size: clamp(1.3rem, 3.6vw, 2.1rem);
  line-height: 1.2;
  color: var(--c-mint);
}

.page-contact .response__body h2 {
  margin: 0 0 1rem;
  font-size: var(--fs-h2);
}

.page-contact .response__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .response__list li {
  position: relative;
  padding-left: 1.15rem;
  color: rgba(244, 241, 234, 0.84);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-contact .response__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background: var(--c-mint);
}

.page-contact .response__list a {
  color: var(--c-mint);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mint);
}

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

/* ---------- 常见合作问题 ---------- */
.page-contact .faq-list {
  margin-top: 1.6rem;
  border-top: 1px solid var(--line-dark);
}

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

.page-contact .faq-item summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 1.15rem 2.6rem 1.15rem 0;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.7vw, 1.15rem);
  line-height: 1.5;
  color: var(--c-paper);
}

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

.page-contact .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0.35rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--c-mint);
  transition: transform 0.25s var(--ease);
}

.page-contact .faq-item[open] summary::after {
  content: "–";
}

.page-contact .faq-item__body {
  padding: 0 0 1.3rem;
  max-width: 68ch;
}

.page-contact .faq-item__body p {
  margin: 0;
  color: var(--c-cool);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-contact .faq-item__body a {
  color: var(--c-mint);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mint);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .quick-list li {
    font-size: 0.95rem;
  }
}

@media (min-width: 860px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 1.3fr 0.85fr;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-contact .channels__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-contact .response__band {
    grid-template-columns: 0.72fr 1.28fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .quick-list a,
  .page-contact .channel-item__value,
  .page-contact .faq-item summary::after {
    transition: none;
  }
}