.page-contact {
  --pc-gap: clamp(.9rem, 2.2vw, 1.5rem);
  --pc-block: clamp(2.25rem, 5.5vw, 4rem);
}

/* ---------- 面包屑间距 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(1rem, 2.5vw, 1.75rem);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(1.25rem, 3vw, 2.25rem);
}

.page-contact .contact-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

.page-contact .contact-hero-copy h1 {
  font-family: var(--f-sans);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-paper);
  margin: .85rem 0 1rem;
}

.page-contact .contact-hero-copy .lede {
  max-width: 46ch;
  color: var(--c-paper);
  opacity: .86;
}

.page-contact .contact-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .contact-hero-media {
  margin: 0;
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 四条合作路径 ---------- */
.page-contact .tracks-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

@media (min-width: 640px) {
  .page-contact .tracks-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-contact .tracks-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .track {
  --track-accent: var(--c-cyan);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: clamp(1.1rem, 2.4vw, 1.5rem);
  background: linear-gradient(180deg, var(--c-navy-2) 0%, var(--c-navy) 100%);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--track-accent);
  box-shadow: var(--shadow-card);
}

.page-contact .track--cyan { --track-accent: var(--c-cyan); }
.page-contact .track--soft { --track-accent: var(--c-cyan-soft); }
.page-contact .track--gold { --track-accent: var(--c-gold); }
.page-contact .track--steel { --track-accent: var(--c-steel); }

.page-contact .track-index {
  font-family: var(--f-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--track-accent);
}

.page-contact .track-title {
  font-family: var(--f-sans);
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-paper);
  margin: 0;
}

.page-contact .track-for {
  font-family: var(--f-serif);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--track-accent);
  margin: 0;
}

.page-contact .track-body {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-paper);
  opacity: .82;
  margin: 0;
}

/* ---------- 通用折叠块 ---------- */
.page-contact details {
  border-top: 1px solid var(--c-line-soft);
}

.page-contact details > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem 0 .35rem;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--c-cyan);
  transition: color var(--dur) var(--ease);
}

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

.page-contact details > summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-contact details[open] > summary::after {
  transform: rotate(-135deg);
}

.page-contact details > summary:hover,
.page-contact details > summary:focus-visible {
  color: var(--c-cyan-soft);
}

.page-contact .details-body {
  padding: .25rem 0 .6rem;
}

.page-contact .details-body p {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-steel);
  margin: 0;
}

.page-contact .track-more {
  margin-top: auto;
}

/* ---------- 三步流程 ---------- */
.page-contact .flow-lede {
  max-width: 62ch;
  margin-top: 1rem;
}

.page-contact .flow-steps {
  list-style: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

@media (min-width: 820px) {
  .page-contact .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .flow-step {
  position: relative;
  padding: clamp(1.25rem, 2.6vw, 1.75rem);
  background: var(--c-board);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-card);
}

.page-contact .flow-num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  font-weight: 700;
  line-height: .85;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--c-cyan);
  margin-bottom: .85rem;
}

@supports not ((-webkit-text-stroke: 1px #000)) {
  .page-contact .flow-num {
    color: rgba(31, 227, 208, .55);
  }
}

.page-contact .flow-title {
  font-family: var(--f-sans);
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--c-paper);
  margin: 0 0 .6rem;
}

.page-contact .flow-step > p {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-paper);
  opacity: .82;
  margin: 0 0 .75rem;
}

.page-contact .flow-more {
  margin-top: auto;
}

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .4rem;
}

.page-contact .prep-list li {
  position: relative;
  padding-left: 1rem;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--c-steel);
}

.page-contact .prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--c-cyan);
  transform: rotate(45deg);
}

/* ---------- 看板定制 ---------- */
.page-contact .dash-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 900px) {
  .page-contact .dash-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

.page-contact .dash-copy > p {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--c-paper);
  opacity: .86;
}

.page-contact .dash-copy .section-title {
  margin-top: .6rem;
}

.page-contact .dash-modules {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}

.page-contact .dash-modules li {
  position: relative;
  padding-left: 1.4rem;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--c-paper);
  opacity: .88;
}

.page-contact .dash-modules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: .75rem;
  height: 1px;
  background: var(--c-cyan);
}

.page-contact .dash-note {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--c-gold);
  background: rgba(243, 197, 68, .06);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-paper);
  opacity: .9;
}

.page-contact .dash-link {
  margin-top: 1.5rem;
}

.page-contact .dash-media {
  margin: 0;
}

/* ---------- 专题共创 ---------- */
.page-contact .topic-lede {
  max-width: 68ch;
  margin-top: 1rem;
}

.page-contact .topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  border-top: 1px solid var(--c-line);
  padding-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

@media (min-width: 820px) {
  .page-contact .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .topic-item {
  padding-left: 1.1rem;
  border-left: 2px solid var(--c-line);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .topic-item:hover {
  border-left-color: var(--c-cyan);
}

.page-contact .topic-item h3 {
  font-family: var(--f-sans);
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--c-paper);
  margin: 0 0 .6rem;
}

.page-contact .topic-item p {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-steel);
  margin: 0;
}

.page-contact .topic-cta {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

/* ---------- 联系方式 ---------- */
.page-contact .contact-channels {
  position: relative;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(31, 227, 208, .09) 0%, transparent 60%),
    var(--c-navy-deep);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

@media (min-width: 860px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .channel {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: clamp(1.25rem, 2.8vw, 1.85rem);
  background: rgba(11, 33, 56, .82);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: inherit;
}

.page-contact a.channel {
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact a.channel:hover,
.page-contact a.channel:focus-visible {
  border-color: var(--c-cyan);
  transform: translateY(-2px);
}

.page-contact .channel-label {
  font-family: var(--f-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.page-contact .channel-value {
  font-family: var(--f-mono);
  font-size: clamp(1rem, 2.3vw, 1.45rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--c-cyan);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .channel-value--text {
  font-family: var(--f-sans);
  font-size: var(--fs-20);
  font-weight: 800;
  line-height: 1.45;
  color: var(--c-paper);
  letter-spacing: 0;
}

.page-contact .channel-meta {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-steel);
}

.page-contact .channel-foot {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-steel);
}

.page-contact .channel-foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 227, 208, .4);
}

.page-contact .channel-foot a:hover {
  color: var(--c-cyan-soft);
  border-bottom-color: var(--c-cyan-soft);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq-list {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  display: grid;
  gap: 0;
  max-width: 900px;
}

.page-contact .faq-item {
  border: 1px solid var(--c-line);
  border-top: none;
  background: var(--c-navy-2);
}

.page-contact .faq-item:first-child {
  border-top: 1px solid var(--c-line);
}

.page-contact .faq-item > summary {
  padding: 1.1rem clamp(1rem, 2.4vw, 1.5rem);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--c-paper);
  border-top: none;
}

.page-contact .faq-item > summary:hover,
.page-contact .faq-item > summary:focus-visible {
  color: var(--c-cyan);
}

.page-contact .faq-item[open] > summary {
  color: var(--c-cyan);
}

.page-contact .faq-item .faq-body {
  padding: 0 clamp(1rem, 2.4vw, 1.5rem) 1.25rem;
}

.page-contact .faq-item .faq-body p {
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--c-steel);
  margin: 0;
}

.page-contact .faq-item .faq-body b {
  color: var(--c-cyan-soft);
  font-family: var(--f-mono);
  font-weight: 700;
}

/* ---------- 装饰刻度线 ---------- */
.page-contact .tick-rail {
  height: 20px;
  margin-top: clamp(2rem, 5vw, 3.5rem);
  background-image: repeating-linear-gradient(
    to right,
    var(--c-line) 0 1px,
    transparent 1px 26px
  );
  background-repeat: repeat-x;
  background-position: bottom left;
  background-size: 26px 9px;
  border-bottom: 1px solid var(--c-line);
  position: relative;
}

.page-contact .tick-rail::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 88px;
  height: 2px;
  background: var(--c-cyan);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .track,
  .page-contact .flow-step,
  .page-contact .topic-item,
  .page-contact a.channel,
  .page-contact details > summary,
  .page-contact details > summary::after {
    transition: none;
  }
}