.page-contact {
  --cc-r: 14px;
  --cc-rail: 320px;
  padding-bottom: clamp(56px, 8vw, 110px);
}

.page-contact .breadcrumb {
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(18px, 3vw, 32px);
  padding-block: clamp(52px, 8vw, 96px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--trench) 0%, rgba(7, 20, 39, .62) 58%, rgba(11, 31, 58, 0) 100%);
}

.page-contact .contact-hero::before,
.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(0, 229, 199, .5);
  pointer-events: none;
}

.page-contact .contact-hero::before {
  top: 14px;
  left: 14px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .contact-hero::after {
  right: 14px;
  bottom: 14px;
  border-top: 0;
  border-left: 0;
}

.page-contact .hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .32;
}

.page-contact .hero-inner {
  position: relative;
  z-index: 1;
}

.page-contact .hero-kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .hero-lead {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.9;
  color: rgba(230, 247, 245, .86);
}

.page-contact .hero-quick {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 780px;
}

.page-contact .hero-quick li {
  padding-left: 16px;
  border-left: 2px solid rgba(0, 229, 199, .5);
}

.page-contact .quick-title {
  display: block;
  margin-bottom: 6px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--mist);
}

.page-contact .quick-text {
  display: block;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 5vw, 44px);
  margin-top: clamp(44px, 6vw, 74px);
}

.page-contact .contact-rail {
  display: grid;
  gap: 14px;
}

.page-contact .rail-card {
  position: relative;
  overflow: hidden;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: linear-gradient(160deg, var(--card-top), var(--card-bot));
  transition: border-color .3s var(--ease);
}

.page-contact .rail-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 54px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 199, 0));
}

.page-contact .rail-card:hover {
  border-color: rgba(0, 229, 199, .5);
}

.page-contact .rail-label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--steel);
}

.page-contact .rail-value {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 17px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--mist);
  word-break: break-word;
}

.page-contact .rail-value--addr {
  font-family: var(--font-cn);
  font-size: 14.5px;
  line-height: 1.8;
  word-break: normal;
}

.page-contact .rail-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 右列章节 ---------- */
.page-contact .contact-flow {
  display: grid;
  gap: clamp(38px, 5.5vw, 64px);
  min-width: 0;
}

.page-contact .flow-section {
  min-width: 0;
}

.page-contact .contact-flow h2 {
  position: relative;
  margin: 0 0 16px;
  padding-left: 18px;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--mist);
}

.page-contact .contact-flow h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .46em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, .14);
}

.page-contact .contact-flow p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(230, 247, 245, .84);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 18px 0 18px;
}

.page-contact .channel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: linear-gradient(150deg, rgba(0, 229, 199, .07), rgba(11, 31, 58, .2));
}

.page-contact .channel h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-contact .channel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 18px 0;
}

.page-contact .collab {
  padding: 16px 18px;
  border-left: 2px solid var(--line);
  background: linear-gradient(90deg, rgba(0, 229, 199, .08), rgba(0, 229, 199, 0) 72%);
  transition: border-color .3s var(--ease);
}

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

.page-contact .collab strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--mist);
}

.page-contact .collab span {
  display: block;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 折叠面板 ---------- */
.page-contact .contact-flow details {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: rgba(10, 27, 49, .55);
  overflow: hidden;
}

.page-contact .contact-flow summary {
  position: relative;
  padding: 16px 20px 16px 48px;
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .contact-flow summary::before {
  content: "+";
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
}

.page-contact .contact-flow details[open] summary::before {
  content: "–";
}

.page-contact .contact-flow details[open] summary {
  border-bottom: 1px solid var(--line);
}

.page-contact .detail-body {
  padding: 16px 20px 20px;
}

.page-contact .detail-body p {
  margin: 0;
  font-size: 14.5px;
}

/* ---------- 准备清单 ---------- */
.page-contact .prep-list {
  counter-reset: prep;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .prep-list li {
  counter-increment: prep;
  position: relative;
  padding: 15px 18px 15px 60px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: rgba(14, 39, 66, .5);
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(230, 247, 245, .84);
}

.page-contact .prep-list li b {
  color: var(--mist);
}

.page-contact .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 咨询主题 ---------- */
.page-contact .topic-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 20px;
}

.page-contact .topic-figure {
  margin: 0;
}

.page-contact .topic-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--cc-r);
}

.page-contact .topic-side {
  min-width: 0;
}

.page-contact .topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .topic-tags .tag {
  font-size: 13px;
  padding: 7px 13px;
}

.page-contact .topic-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 服务范围 ---------- */
.page-contact .scope-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 4px 0 22px;
}

.page-contact .scope-stat {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: rgba(7, 20, 39, .5);
}

.page-contact .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-contact .stat-label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 相关入口 ---------- */
.page-contact .related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
}

.page-contact .related-card {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--cc-r);
  background: linear-gradient(160deg, var(--card-top), var(--card-bot));
  text-decoration: none;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-contact .related-card:hover {
  border-color: rgba(0, 229, 199, .55);
  transform: translateY(-2px);
}

.page-contact .rc-title {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--mist);
}

.page-contact .rc-text {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .hero-quick {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-contact .scope-stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 700px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-contact .collab-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 820px) {
  .page-contact .topic-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
  .page-contact .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-body {
    grid-template-columns: var(--cc-rail) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
  .page-contact .contact-rail {
    position: sticky;
    top: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .rail-card,
  .page-contact .collab,
  .page-contact .related-card {
    transition: none;
  }
  .page-contact .related-card:hover {
    transform: none;
  }
}